* [Qemu-devel] [PATCH] Porting TCG to alpha platform
@ 2010-01-19 8:47 identifier scorpio
2010-01-19 20:18 ` Richard Henderson
2010-01-19 21:42 ` Stefan Weil
0 siblings, 2 replies; 21+ messages in thread
From: identifier scorpio @ 2010-01-19 8:47 UTC (permalink / raw)
To: qemu-devel
Hello.
I ported TCG to alpha platform, the patch is currently based on stable-0.10 branch, and now it can run linux-0.2.img testing image on my alpha XP1000 workstation. but it still can't run MS-windows, and I hope someone, especially those guys that are working on target-alpha, may help me to find the bugs.
From 0ee33ea1e43298e6045e16dfcf07cb7a530dfd56 Mon Sep 17 00:00:00 2001
From: Dong Weiyu <cidentifier@yahoo.com.cn>
Date: Tue, 19 Jan 2010 16:22:54 +0800
Subject: [PATCH] porting TCG to alpha platform.
---
cpu-all.h | 2 +-
tcg/alpha/tcg-target.c | 1335 ++++++++++++++++++++++++++++++++++++++++++++++++
tcg/alpha/tcg-target.h | 70 +++
3 files changed, 1406 insertions(+), 1 deletions(-)
create mode 100644 tcg/alpha/tcg-target.c
create mode 100644 tcg/alpha/tcg-target.h
diff --git a/cpu-all.h b/cpu-all.h
index e0c3efd..bdf6fb2 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -22,7 +22,7 @@
#include "qemu-common.h"
-#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__)
+#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__) || defined(__alpha__)
#define WORDS_ALIGNED
#endif
diff --git a/tcg/alpha/tcg-target.c b/tcg/alpha/tcg-target.c
new file mode 100644
index 0000000..6bbd69f
--- /dev/null
+++ b/tcg/alpha/tcg-target.c
@@ -0,0 +1,1335 @@
+/*
+ * Tiny Code Generator for QEMU on ALPHA platform
+*/
+
+#ifndef NDEBUG
+static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
+ "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
+ "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
+ "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
+ "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31",
+};
+#endif
+
+/*
+ * $26 ~ $31 are special, reserved,
+ * and $25 is deliberately reserved for jcc operation
+ * and $0 is usually used for return function result, better allocate it later
+ * and $15 is used for cpu_env pointer, allocate it at last
+*/
+static const int tcg_target_reg_alloc_order[] = {
+ TCG_REG_1, TCG_REG_2, TCG_REG_3, TCG_REG_4, TCG_REG_5, TCG_REG_6,
+ TCG_REG_7, TCG_REG_8, TCG_REG_22,
+ TCG_REG_9, TCG_REG_10, TCG_REG_11, TCG_REG_12, TCG_REG_13, TCG_REG_14,
+ TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19, TCG_REG_20, TCG_REG_21
+};
+
+/*
+ * according to alpha calling convention, these 6 registers are used for
+ * function parameter passing. if function has more than 6 parameters, remained
+ * ones are stored on stack.
+*/
+static const int tcg_target_call_iarg_regs[6] = {
+ TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19, TCG_REG_20, TCG_REG_21
+};
+
+/*
+ * according to alpha calling convention, $0 is used for returning function result.
+*/
+static const int tcg_target_call_oarg_regs[1] = { TCG_REG_0 };
+
+/*
+ * save the address of TB's epilogue.
+*/
+static uint8_t *tb_ret_addr;
+
+/*
+ * op-code and func-code for jump insn
+*/
+#define OP_CALL 0x01A
+#define OP_RET 0x01A
+#define OP_JMP 0x01A
+
+#define FUNC_JMP 0x00
+#define FUNC_CALL 0x01
+#define FUNC_RET 0x02
+
+#define OP_BR 0x30
+#define OP_BEQ 0x39
+#define OP_BNE 0x3D
+#define OP_BLBC 0x38
+#define OP_BLBS 0x3C
+
+#define OP_ADDSUBCMP 0x10
+
+#define FUNC_ADDL 0x00
+#define FUNC_SUBL 0x09
+#define FUNC_ADDQ 0x20
+#define FUNC_SUBQ 0x29
+#define FUNC_CMPEQ 0x2D
+#define FUNC_CMPLT 0x4D
+#define FUNC_CMPLE 0x6D
+#define FUNC_CMPULT 0x1D
+#define FUNC_CMPULE 0x3D
+
+#define OP_MUL 0x13
+
+#define FUNC_MULL 0x00
+#define FUNC_MULQ 0x20
+
+#define OP_LOGIC 0x11
+
+#define FUNC_AND 0x00
+#define FUNC_BIS 0x20
+#define FUNC_XOR 0x40
+
+#define OP_SHIFT 0x12
+
+#define FUNC_SLL 0x39
+#define FUNC_SRL 0x34
+#define FUNC_SRA 0x3C
+
+#define OP_SEXT 0x1C
+
+#define FUNC_SEXTB 0x00
+#define FUNC_SEXTW 0x01
+
+#define OP_LDA 0x08
+#define OP_LDAH 0x09
+#define OP_LDBU 0x0A
+#define OP_LDWU 0x0C
+#define OP_LDL 0x28
+#define OP_LDQ 0x29
+#define OP_STB 0x0E
+#define OP_STW 0x0D
+#define OP_STL 0x2C
+#define OP_STQ 0x2D
+
+/*
+ * return the # of regs used for parameter passing on procedure calling.
+ * note that alpha use $16~$21 to transfer the first 6 paramenters of a procedure.
+*/
+static inline int tcg_target_get_call_iarg_regs_count(int flags)
+{
+ return 6;
+}
+
+/*
+ * given constraint, return available register set. this function is called once
+ * for each op at qemu's initialization stage.
+*/
+static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
+{
+ const char *ct_str = *pct_str;
+
+ switch(ct_str[0])
+ {
+ case 'r':
+ /* constaint 'r' means any register is okay */
+ ct->ct |= TCG_CT_REG;
+ tcg_regset_set32(ct->u.regs, 0, 0xffffffffu);
+ break;
+
+ case 'L':
+ /*
+ * constranit 'L' is used for qemu_ld/st, which has 2 meanings:
+ * 1st, we the argument need to be allocated a register.
+ * 2nd, we should reserve some registers that belong to caller-clobbered
+ * list for qemu_ld/st local usage, so these registers must not be
+ * allocated to the argument that the 'L' constraint is describing.
+ *
+ * note that op qemu_ld/st has the TCG_OPF_CALL_CLOBBER flag, and
+ * tcg will free all callee-clobbered registers before generate target
+ * insn for qemu_ld/st, so we can use these register directly without
+ * warrying about destroying their content.
+ */
+ ct->ct |= TCG_CT_REG;
+ tcg_regset_set32(ct->u.regs, 0, 0xffffffffu);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_0);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_16);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_17);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_18);
+ break;
+
+ default:
+ return -1;
+ }
+
+ ct_str++;
+ *pct_str = ct_str;
+ return 0;
+}
+
+/*
+ * whether op's input argument may use constant
+*/
+static inline int tcg_target_const_match( \
+ tcg_target_long val, const TCGArgConstraint *arg_ct)
+{
+ int ct = arg_ct->ct;
+ return (ct & TCG_CT_CONST) ? 1 : 0;
+}
+
+static inline void tcg_out_inst2(TCGContext *s, int Opcode, int Ra, int Disp)
+{
+ uint32_t v = 0;
+ v = ( ( Opcode & 0x3f ) << 26 )
+ | ( ( Ra & 0x1f ) << 21 )
+ | ( Disp & 0x1fffff) ;
+ tcg_out32(s, v);
+}
+
+static inline void tcg_out_inst3_disp(TCGContext *s, int Opcode, int Ra, int Rb, int Disp)
+{
+ uint32_t v = 0;
+ v = ( ( Opcode & 0x3f ) << 26 )
+ | ( ( Ra & 0x1f ) << 21 )
+ | ( ( Rb & 0x1f ) << 16 )
+ | ( Disp & 0xffff) ;
+ tcg_out32(s, v);
+}
+
+static inline void tcg_out_inst3_func(TCGContext *s, int Opcode, int Ra, int Rb, int Func, int Disp)
+{
+ uint32_t v = 0;
+ v = ( ( Opcode & 0x3f ) << 26 )
+ | ( ( Ra & 0x1f ) << 21 )
+ | ( ( Rb & 0x1f ) << 16 )
+ | ( ( Func & 0x3 ) << 14 )
+ | ( Disp & 0x3fff) ;
+ tcg_out32(s, v);
+}
+
+static inline void tcg_out_inst4(TCGContext *s, int Opcode, int Ra, int Rb, int Func, int Rc)
+{
+ uint32_t v = 0;
+ v = ( (Opcode & 0x3f) << 26 )
+ | ( ( Ra & 0x1f ) << 21 )
+ | ( ( Rb & 0x1f ) << 16 )
+ | ( ( Func & 0x7f ) << 5 )
+ | ( Rc & 0x1f ) ;
+ tcg_out32(s, v);
+}
+
+static inline void tcg_out_inst4i(TCGContext *s, int Opcode, int Ra, int Lit, int Func, int Rc)
+{
+ uint32_t v = 0;
+ v = ( (Opcode & 0x3f) << 26 )
+ | ( ( Ra & 0x1f ) << 21 )
+ | ( ( Lit & 0xff ) << 13 )
+ | ( ( Func & 0x7f ) << 5 )
+ | ( 1 << 12 )
+ | ( Rc & 0x1f ) ;
+ tcg_out32(s, v);
+}
+
+/*
+ * mov from a reg to another
+*/
+static inline void tcg_out_mov(TCGContext *s, int Rc, int Rb)
+{
+ if ( Rb != Rc ) {
+ tcg_out_inst4(s, OP_LOGIC, TCG_REG_31, Rb, FUNC_BIS, Rc);
+ }
+}
+
+/*
+ * mov a 64-bit immediate 'arg' to regsiter 'Ra', this function will
+ * generate fixed length (8 insns, 32 bytes) of target insn sequence.
+*/
+static void tcg_out_movi_fixl( \
+ TCGContext *s, TCGType type, int Ra, tcg_target_long arg)
+{
+ tcg_target_long l0, l1, l2, l3;
+ tcg_target_long l1_tmp, l2_tmp, l3_tmp;
+
+ l0 = arg & 0xffffu;
+ l1_tmp = l1 = ( arg >> 16) & 0xffffu;
+ l2_tmp = l2 = ( arg >> 32) & 0xffffu;
+ l3_tmp = l3 = ( arg >> 48) & 0xffffu;
+
+ if ( l0 & 0x8000u)
+ l1_tmp = (l1 + 1) & 0xffffu;
+ if ( (l1_tmp & 0x8000u) || ((l1_tmp == 0) && (l1_tmp != l1)))
+ l2_tmp = (l2 + 1) & 0xffffu;
+ if ( (l2_tmp & 0x8000u) || ((l2_tmp == 0) && (l2_tmp != l2)))
+ l3_tmp = (l3 + 1) & 0xffffu;
+
+ tcg_out_inst3_disp( s, OP_LDAH, Ra, TCG_REG_31, l3_tmp);
+ tcg_out_inst3_disp( s, OP_LDA, Ra, Ra, l2_tmp);
+ tcg_out_inst4i( s, OP_SHIFT, Ra, 32, FUNC_SLL, Ra);
+ tcg_out_inst3_disp( s, OP_LDAH, Ra, Ra, l1_tmp);
+ tcg_out_inst3_disp( s, OP_LDA, Ra, Ra, l0);
+}
+
+/*
+ * mov 64-bit immediate 'arg' to regsiter 'Ra'. this function will
+ * generate variable length of target insn sequence.
+*/
+static inline void tcg_out_movi( \
+ TCGContext *s, TCGType type, int Ra, tcg_target_long arg)
+{
+ if (type == TCG_TYPE_I32) {
+ if ( arg != (int32_t)arg)
+ tcg_abort();
+ }
+
+ if (arg == 0) {
+ tcg_out_inst4(s, OP_LOGIC, Ra, Ra, FUNC_XOR, Ra);
+ }
+ else if( arg == (int16_t)arg ) {
+ tcg_out_inst3_disp(s, OP_LDA, Ra, TCG_REG_31, arg );
+ }
+ else if( arg == (int32_t)arg ) {
+ tcg_out_inst3_disp(s, OP_LDAH, Ra, TCG_REG_31, (arg>>16));
+ if( arg & ((tcg_target_ulong)0x8000) ) {
+ tcg_out_inst3_disp(s, OP_LDAH, Ra, Ra, 1);
+ }
+ tcg_out_inst3_disp(s, OP_LDA, Ra, Ra, arg);
+ } else {
+ tcg_out_movi_fixl(s, type, Ra, arg);
+ }
+}
+
+static inline int _is_tmp_reg( int r)
+{
+ if ( r == TMP_REG1 || r == TMP_REG2 || r == TMP_REG3)
+ return 1;
+ else
+ return 0;
+}
+
+/*
+ * load value in disp(Rb) to Ra.
+*/
+static inline void tcg_out_ld( \
+ TCGContext *s, TCGType type, int Ra, int Rb, tcg_target_long disp)
+{
+ int Opcode;
+
+ if ( _is_tmp_reg(Ra) || _is_tmp_reg(Rb))
+ tcg_abort();
+
+ Opcode = ((type == TCG_TYPE_I32) ? OP_LDL : OP_LDQ);
+
+ if( disp != (int16_t)disp ) {
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
+ tcg_out_inst4(s, OP_ADDSUBCMP, Rb, TMP_REG1, FUNC_ADDQ, TMP_REG1);
+ tcg_out_inst3_disp(s, Opcode, Ra, TMP_REG1, 0);
+ }
+ else
+ tcg_out_inst3_disp(s, Opcode, Ra, Rb, disp);
+}
+
+/*
+ * store value in Ra to disp(Rb).
+*/
+static inline void tcg_out_st( \
+ TCGContext *s, TCGType type, int Ra, int Rb, tcg_target_long disp)
+{
+ int Opcode;
+
+ if ( _is_tmp_reg(Ra) || _is_tmp_reg(Rb))
+ tcg_abort();
+
+ Opcode = ((type == TCG_TYPE_I32) ? OP_STL : OP_STQ);
+
+ if( disp != (int16_t)disp ) {
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
+ tcg_out_inst4(s, OP_ADDSUBCMP, Rb, TMP_REG1, FUNC_ADDQ, TMP_REG1);
+ tcg_out_inst3_disp(s, Opcode, Ra, TMP_REG1, 0);
+ }
+ else
+ tcg_out_inst3_disp(s, Opcode, Ra, Rb, disp);
+}
+
+/*
+ * generate arithmatic instruction with immediate. Ra is used as both
+ * input and output, and val is used as another input.
+*/
+static inline void tgen_arithi( \
+ TCGContext *s, int Opcode, int Func, int Ra, tcg_target_long val)
+{
+ if ( _is_tmp_reg(Ra))
+ tcg_abort();
+
+ if (val == (uint8_t)val) {
+ tcg_out_inst4i(s, Opcode, Ra, val, Func, Ra);
+ } else {
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, val);
+ tcg_out_inst4(s, Opcode, Ra, TMP_REG1, Func, Ra);
+ }
+}
+
+/*
+ * generate addq instruction with immediate.
+*/
+static void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
+{
+ if (val != 0)
+ tgen_arithi(s, OP_ADDSUBCMP, FUNC_ADDQ, reg, val);
+}
+
+/*
+ * generate insn to push reg onto stack.
+*/
+static inline void tcg_out_push(TCGContext *s, int reg)
+{
+ tcg_out_inst4i(s, OP_ADDSUBCMP, TCG_REG_30, 8, FUNC_SUBQ, TCG_REG_30);
+ tcg_out_inst3_disp(s, OP_STQ, reg, TCG_REG_30, 0);
+}
+
+/*
+ * generate insn to pop value from stack to reg.
+*/
+static inline void tcg_out_pop(TCGContext *s, int reg)
+{
+ tcg_out_inst3_disp(s, OP_LDQ, reg, TCG_REG_30, 0);
+ tcg_out_inst4i(s, OP_ADDSUBCMP, TCG_REG_30, 8, FUNC_ADDQ, TCG_REG_30);
+}
+
+static const uint8_t tcg_cond_to_jcc[10] = {
+ [TCG_COND_EQ] = FUNC_CMPEQ,
+ [TCG_COND_NE] = FUNC_CMPEQ,
+ [TCG_COND_LT] = FUNC_CMPLT,
+ [TCG_COND_GE] = FUNC_CMPLT,
+ [TCG_COND_LE] = FUNC_CMPLE,
+ [TCG_COND_GT] = FUNC_CMPLE,
+ [TCG_COND_LTU] = FUNC_CMPULT,
+ [TCG_COND_GEU] = FUNC_CMPULT,
+ [TCG_COND_LEU] = FUNC_CMPULE,
+ [TCG_COND_GTU] = FUNC_CMPULE
+};
+
+/*
+ * called by tcg_out_reloc() when the label address is determined,
+ * i.e., label->has_value is true. what should be done is to patch
+ * the jmp insn that reference this label.
+ *
+ * code_ptr - position need to patch
+ * type - relocation type
+ * value - label address
+ * addend - not used
+*/
+static void patch_reloc(uint8_t *code_ptr, \
+ int type, tcg_target_long value, tcg_target_long addend)
+{
+ TCGContext s;
+ tcg_target_long val;
+
+ if ( type != R_ALPHA_REFQUAD)
+ tcg_abort();
+ if ( value & 3)
+ tcg_abort();
+
+ s.code_ptr = code_ptr;
+ val = (value - (tcg_target_long)s.code_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+
+ tcg_out_inst2(&s, OP_BR, TCG_REG_31, val);
+}
+
+/*
+ * generate insns for BR
+*/
+static void tcg_out_br(TCGContext *s, int label_index)
+{
+ TCGLabel *l = &s->labels[label_index];
+
+ if (l->has_value) {
+ tcg_target_long val;
+ if ( l->u.value & 0x3)
+ tcg_abort();
+ val = ((tcg_target_long)(l->u.value) - (tcg_target_long)s->code_ptr - 4) >> 2;
+ if ( val >= -0x100000 && val < 0x100000) {
+ // if distance can be put into 21-bit field
+ tcg_out_inst2(s, OP_BR, TMP_REG1, val);
+ } else {
+ tcg_abort();
+ }
+ } else {
+ /* record relocation infor */
+ tcg_out_reloc(s, s->code_ptr, R_ALPHA_REFQUAD, label_index, 0);
+ s->code_ptr += 4;
+ }
+}
+
+/*
+ * generate insn for INDEX_op_brcond
+*/
+static void tcg_out_brcond( TCGContext *s, int cond, \
+ TCGArg arg1, TCGArg arg2, int const_arg2, int label_index)
+{
+ int func, opc;
+ TCGLabel *l = &s->labels[label_index];
+
+ if ( cond < TCG_COND_EQ || cond > TCG_COND_GTU || const_arg2)
+ tcg_abort();
+
+ func = tcg_cond_to_jcc[cond];
+ tcg_out_inst4(s, OP_ADDSUBCMP, arg1, arg2, func, TMP_REG1);
+
+ // if cond is an odd number, TMP_REG1 = 0 means true
+ opc = (cond & 1) ? OP_BLBC : OP_BLBS;
+
+ if (l->has_value) {
+ tcg_target_long val;
+ if ( l->u.value & 3)
+ tcg_abort();
+ val = ((tcg_target_long)l->u.value - (tcg_target_long)s->code_ptr - 4) >> 2;
+ if ( val >= -0x100000 && val < 0x100000) {
+ // if distance can be put into 21-bit field
+ tcg_out_inst2(s, opc, TMP_REG1, val);
+ } else {
+ tcg_abort();
+ }
+ } else {
+ tcg_out_inst2(s, opc^4, TMP_REG1, 1);
+ /* record relocation infor */
+ tcg_out_reloc(s, s->code_ptr, R_ALPHA_REFQUAD, label_index, 0);
+ s->code_ptr += 4;
+ }
+}
+
+
+#if defined(CONFIG_SOFTMMU)
+
+#include "../../softmmu_defs.h"
+
+static void *qemu_ld_helpers[4] = {
+ __ldb_mmu,
+ __ldw_mmu,
+ __ldl_mmu,
+ __ldq_mmu,
+};
+
+static void *qemu_st_helpers[4] = {
+ __stb_mmu,
+ __stw_mmu,
+ __stl_mmu,
+ __stq_mmu,
+};
+
+#endif
+
+/*
+ * XXX: qemu_ld and qemu_st could be modified to clobber only EDX and
+ * EAX. It will be useful once fixed registers globals are less common.
+ *
+ * output host insn for op 'qemu_ldxx t0, t1, flags', which means fetching value from t1 to t0.
+ * flags gives the current CPU mode, kernel or user.
+ *
+ * opc argument determines the data width and extension type (zero or signed), and has the
+ * following layout:
+ * 2 1 0
+ * ------------------------------------
+ * | | E | W |
+ * ------------------------------------
+ *
+ * E = 0 means zero extention, 1 means signed extension
+ * W = 0 means byte, 1 means word, 2 means dword.
+ *
+ * Note that VM addr space may be 32-bit or 64-bit, below, we take 32-bit addr space as example
+ * when doing the comment.
+*/
+static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, int opc)
+{
+ int addr_reg, data_reg, r0, r1, mem_index, s_bits;
+ tcg_target_long val;
+
+#if defined(CONFIG_SOFTMMU)
+ uint8_t *label1_ptr, *label2_ptr;
+#endif
+
+ data_reg = *args++;
+ addr_reg = *args++;
+ mem_index = *args;
+ s_bits = opc & 3;
+
+ r0 = TCG_REG_16;
+ r1 = TCG_REG_17;
+
+#if defined(CONFIG_SOFTMMU)
+
+ tcg_out_mov(s, r1, addr_reg);
+ tcg_out_mov(s, r0, addr_reg);
+
+#if TARGET_LONG_BITS == 32
+ /* if VM is of 32-bit arch, clear higher 32-bit of addr */
+ tcg_out_inst4i(s, OP_SHIFT, r0, 32, FUNC_SLL, r0);
+ tcg_out_inst4i(s, OP_SHIFT, r0, 32, FUNC_SRL, r0);
+ tcg_out_inst4i(s, OP_SHIFT, r1, 32, FUNC_SLL, r1);
+ tcg_out_inst4i(s, OP_SHIFT, r1, 32, FUNC_SRL, r1);
+#endif
+
+ tgen_arithi(s, OP_LOGIC, FUNC_AND, r0, TARGET_PAGE_MASK|((1<<s_bits)-1));
+
+ tgen_arithi(s, OP_SHIFT, FUNC_SRL, r1, TARGET_PAGE_BITS-CPU_TLB_ENTRY_BITS);
+ tgen_arithi(s, OP_LOGIC, FUNC_AND, r1, (CPU_TLB_SIZE-1)<<CPU_TLB_ENTRY_BITS);
+
+ tcg_out_addi(s, r1, offsetof(CPUState, tlb_table[mem_index][0].addr_read)); // addq r1, offset, r1
+ tcg_out_inst4(s, OP_ADDSUBCMP, r1, TCG_REG_15, FUNC_ADDQ, r1); // addq r1, $15, r1
+#if TARGET_LONG_BITS == 32
+ tcg_out_inst3_disp(s, OP_LDL, TMP_REG1, r1, 0); // ldl TMP_REG1, 0(r1)
+ tcg_out_inst4i(s, OP_SHIFT, TMP_REG1, 32, FUNC_SLL, TMP_REG1);
+ tcg_out_inst4i(s, OP_SHIFT, TMP_REG1, 32, FUNC_SRL, TMP_REG1);
+#else
+ tcg_out_inst3_disp(s, OP_LDQ, TMP_REG1, r1, 0); // ldq TMP_REG1, 0(r1)
+#endif
+
+ //
+ // now, r0 contains the page# and TMP_REG1 contains the addr to tlb_entry.addr_read
+ // we below will compare them
+ //
+ tcg_out_inst4(s, OP_ADDSUBCMP, TMP_REG1, r0, FUNC_CMPEQ, TMP_REG1);
+
+ tcg_out_mov(s, r0, addr_reg);
+#if TARGET_LONG_BITS == 32
+ tcg_out_inst4i(s, OP_SHIFT, r0, 32, FUNC_SLL, r0);
+ tcg_out_inst4i(s, OP_SHIFT, r0, 32, FUNC_SRL, r0);
+#endif
+
+ //
+ // if equal, we jump to label1. since label1 is not resolved yet,
+ // we just record a relocation.
+ //
+ label1_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ //
+ // here, unequal, TLB-miss.
+ //
+ tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_17, mem_index); // pass argument 2
+ tcg_out_movi(s, TCG_TYPE_I64, \
+ TMP_REG1, (tcg_target_long)qemu_ld_helpers[s_bits]); // get helper func entry
+ tcg_out_push(s, addr_reg);
+ tcg_out_push(s, TCG_REG_26);
+ tcg_out_push(s, TCG_REG_15);
+ tcg_out_mov(s, TCG_REG_27, TMP_REG1);
+ tcg_out_inst3_func(s, OP_CALL, TCG_REG_26, TMP_REG1, FUNC_CALL, 0); // call helper func
+ tcg_out_pop(s, TCG_REG_15);
+ tcg_out_pop(s, TCG_REG_26);
+ tcg_out_pop(s, addr_reg);
+
+ //
+ // after helper function call, the result of ld is saved in $0
+ //
+ switch(opc) {
+ case 0 | 4:
+ tcg_out_inst4(s, OP_SEXT, TCG_REG_31, TCG_REG_0, FUNC_SEXTB, data_reg);
+ break;
+ case 1 | 4:
+ tcg_out_inst4(s, OP_SEXT, TCG_REG_31, TCG_REG_0, FUNC_SEXTW, data_reg);
+ break;
+ case 2 | 4:
+ tcg_out_inst4i(s, OP_SHIFT, TCG_REG_0, 32, FUNC_SLL, data_reg);
+ tcg_out_inst4i(s, OP_SHIFT, data_reg, 32, FUNC_SRA, data_reg);
+ break;
+ case 0:
+ tcg_out_inst4i(s, OP_SHIFT, TCG_REG_0, 56, FUNC_SLL, data_reg);
+ tcg_out_inst4i(s, OP_SHIFT, data_reg, 56, FUNC_SRL, data_reg);
+ break;
+ case 1:
+ tcg_out_inst4i(s, OP_SHIFT, TCG_REG_0, 48, FUNC_SLL, data_reg);
+ tcg_out_inst4i(s, OP_SHIFT, data_reg, 48, FUNC_SRL, data_reg);
+ break;
+ case 2:
+ tcg_out_inst4i(s, OP_SHIFT, TCG_REG_0, 32, FUNC_SLL, data_reg);
+ tcg_out_inst4i(s, OP_SHIFT, data_reg, 32, FUNC_SRL, data_reg);
+ break;
+ case 3:
+ tcg_out_mov(s, data_reg, TCG_REG_0);
+ break;
+ default:
+ tcg_abort();
+ break;
+ }
+
+ //
+ // we have done, jmp to label2. label2 is not resolved yet,
+ // we record a relocation.
+ //
+ label2_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ // patch jmp to label1
+ val = (s->code_ptr - label1_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label1_ptr = (uint32_t) \
+ ( ( OP_BNE << 26 ) | ( TMP_REG1 << 21 ) \
+ | ( val & 0x1fffff) );
+
+ //
+ // if we get here, a TLB entry is hit, r0 contains the guest addr and
+ // r1 contains the ptr that point to tlb_entry.addr_read. what we should
+ // do is to load the tlb_entry.addend (64-bit on alpha) and add it to
+ // r0 to get the host VA
+ //
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, \
+ offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_read));
+ tcg_out_inst4(s, OP_ADDSUBCMP, r1, TMP_REG1, FUNC_ADDQ, r1);
+ tcg_out_inst3_disp(s, OP_LDQ, TMP_REG1, r1, 0);
+ tcg_out_inst4(s, OP_ADDSUBCMP, r0, TMP_REG1, FUNC_ADDQ, r0);
+
+#else
+ r0 = addr_reg;
+#endif // endif defined(CONFIG_SOFTMMU)
+
+#ifdef TARGET_WORDS_BIGENDIAN
+ tcg_abort();
+#endif
+
+ //
+ // when we get here, r0 contains the host VA that can be used to access guest PA
+ //
+ switch(opc) {
+ case 0:
+ tcg_out_inst3_disp(s, OP_LDBU, data_reg, r0, 0);
+ break;
+ case 0 | 4:
+ tcg_out_inst3_disp(s, OP_LDBU, data_reg, r0, 0);
+ tcg_out_inst4(s, OP_SEXT, TCG_REG_31, data_reg, FUNC_SEXTB, data_reg);
+ break;
+ case 1:
+ tcg_out_inst3_disp(s, OP_LDWU, data_reg, r0, 0);
+ break;
+ case 1 | 4:
+ tcg_out_inst3_disp(s, OP_LDWU, data_reg, r0, 0);
+ tcg_out_inst4(s, OP_SEXT, TCG_REG_31, data_reg, FUNC_SEXTW, data_reg);
+ break;
+ case 2:
+ tcg_out_inst3_disp(s, OP_LDL, data_reg, r0, 0);
+ tcg_out_inst4i(s, OP_SHIFT, data_reg, 32, FUNC_SLL, data_reg);
+ tcg_out_inst4i(s, OP_SHIFT, data_reg, 32, FUNC_SRL, data_reg);
+ break;
+ case 2 | 4:
+ tcg_out_inst3_disp(s, OP_LDL, data_reg, r0, 0);
+ break;
+ case 3:
+ tcg_out_inst3_disp(s, OP_LDQ, data_reg, r0, 0);
+ break;
+ default:
+ tcg_abort();
+ }
+
+#if defined(CONFIG_SOFTMMU)
+ /* label2: */
+ val = (s->code_ptr - label2_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label2_ptr = (uint32_t)( ( OP_BR << 26 ) \
+ | ( TCG_REG_31 << 21 ) | ( val & 0x1fffff) );
+#endif
+}
+
+static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int opc)
+{
+ int addr_reg, data_reg, r0, r1, mem_index, s_bits;
+ tcg_target_long val;
+
+#if defined(CONFIG_SOFTMMU)
+ uint8_t *label1_ptr, *label2_ptr;
+#endif
+
+ data_reg = *args++;
+ addr_reg = *args++;
+ mem_index = *args;
+ s_bits = opc&3;
+
+ r0 = TCG_REG_16;
+ r1 = TCG_REG_17;
+
+#if defined(CONFIG_SOFTMMU)
+
+ tcg_out_mov(s, r1, addr_reg);
+ tcg_out_mov(s, r0, addr_reg);
+
+#if TARGET_LONG_BITS == 32
+ /* if VM is of 32-bit arch, clear higher 32-bit of addr */
+ tcg_out_inst4i(s, OP_SHIFT, r0, 32, FUNC_SLL, r0);
+ tcg_out_inst4i(s, OP_SHIFT, r0, 32, FUNC_SRL, r0);
+ tcg_out_inst4i(s, OP_SHIFT, r1, 32, FUNC_SLL, r1);
+ tcg_out_inst4i(s, OP_SHIFT, r1, 32, FUNC_SRL, r1);
+#endif
+
+ tgen_arithi(s, OP_LOGIC, FUNC_AND, r0, TARGET_PAGE_MASK | ((1 << s_bits) - 1));
+
+ tgen_arithi(s, OP_SHIFT, FUNC_SRL, r1, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
+ tgen_arithi(s, OP_LOGIC, FUNC_AND, r1, (CPU_TLB_SIZE-1) << CPU_TLB_ENTRY_BITS);
+
+ tcg_out_addi(s, r1, offsetof(CPUState, tlb_table[mem_index][0].addr_write));
+ tcg_out_inst4(s, OP_ADDSUBCMP, r1, TCG_REG_15, FUNC_ADDQ, r1);
+
+#if TARGET_LONG_BITS == 32
+ tcg_out_inst3_disp(s, OP_LDL, TMP_REG1, r1, 0);
+ tcg_out_inst4i(s, OP_SHIFT, TMP_REG1, 32, FUNC_SLL, TMP_REG1);
+ tcg_out_inst4i(s, OP_SHIFT, TMP_REG1, 32, FUNC_SRL, TMP_REG1);
+#else
+ tcg_out_inst3_disp(s, OP_LDQ, TMP_REG1, r1, 0);
+#endif
+
+ //
+ // now, r0 contains the page# and TMP_REG1 contains the addr to tlb_entry.addr_read
+ // we below will compare them
+ //
+ tcg_out_inst4(s, OP_ADDSUBCMP, TMP_REG1, r0, FUNC_CMPEQ, TMP_REG1);
+
+ tcg_out_mov(s, r0, addr_reg);
+#if TARGET_LONG_BITS == 32
+ tcg_out_inst4i(s, OP_SHIFT, r0, 32, FUNC_SLL, r0);
+ tcg_out_inst4i(s, OP_SHIFT, r0, 32, FUNC_SRL, r0);
+#endif
+
+ //
+ // if equal, we jump to label1. since label1 is not resolved yet,
+ // we just record a relocation.
+ //
+ label1_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ // here, unequal, TLB-miss, ...
+ tcg_out_mov(s, TCG_REG_17, data_reg);
+ tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_18, mem_index);
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)qemu_st_helpers[s_bits]);
+
+ tcg_out_push(s, data_reg);
+ tcg_out_push(s, addr_reg);
+ tcg_out_push(s, TCG_REG_26);
+ tcg_out_push(s, TCG_REG_15);
+ tcg_out_mov(s, TCG_REG_27,TMP_REG1);
+ tcg_out_inst3_func(s, OP_CALL, TCG_REG_26, TMP_REG1, FUNC_CALL, 0);
+ tcg_out_pop(s, TCG_REG_15);
+ tcg_out_pop(s, TCG_REG_26);
+ tcg_out_pop(s, addr_reg);
+ tcg_out_pop(s, data_reg);
+
+ //
+ // we have done, jmp to label2. label2 is not resolved yet,
+ // we record a relocation.
+ //
+ label2_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ // patch jmp to label1
+ val = (s->code_ptr - label1_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label1_ptr = (uint32_t) \
+ ( ( OP_BNE << 26) | ( TMP_REG1 << 21 )
+ | ( val & 0x1fffff) );
+
+ //
+ // if we get here, a TLB entry is hit, r0 contains the guest addr and
+ // r1 contains the ptr that point to tlb_entry.addr_read. what we should
+ // do is to load the tlb_entry.addend (64-bit on alpha) and add it to
+ // r0 to get the host VA
+ //
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, \
+ offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_write));
+ tcg_out_inst4(s, OP_ADDSUBCMP, r1, TMP_REG1, FUNC_ADDQ, r1);
+ tcg_out_inst3_disp(s, OP_LDQ, TMP_REG1, r1, 0);
+ tcg_out_inst4(s, OP_ADDSUBCMP, r0, TMP_REG1, FUNC_ADDQ, r0);
+
+#else
+ r0 = addr_reg;
+#endif
+
+#ifdef TARGET_WORDS_BIGENDIAN
+ tcg_abort();
+#endif
+
+ //
+ // when we get here, r0 contains the host VA that can be used to access guest PA
+ //
+ switch(opc) {
+ case 0:
+ tcg_out_inst3_disp(s, OP_STB, data_reg, r0, 0);
+ break;
+ case 1:
+ tcg_out_inst3_disp(s, OP_STW, data_reg, r0, 0);
+ break;
+ case 2:
+ tcg_out_inst3_disp(s, OP_STL, data_reg, r0, 0);
+ break;
+ case 3:
+ tcg_out_inst3_disp(s, OP_STQ, data_reg, r0, 0);
+ break;
+ default:
+ tcg_abort();
+ }
+
+#if defined(CONFIG_SOFTMMU)
+ /* patch jmp to label2: */
+ val = (s->code_ptr - label2_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label2_ptr = (uint32_t)( ( OP_BR << 26 ) \
+ | ( TCG_REG_31 << 21 ) | ( val & 0x1fffff));
+#endif
+}
+
+static inline void tgen_ldxx( TCGContext *s, int Ra, int Rb, tcg_target_long disp, int flags)
+{
+ int opc_array[4] = { OP_LDBU, OP_LDWU, OP_LDL, OP_LDQ};
+ int opc = opc_array[flags & 3];
+
+ if ( _is_tmp_reg(Ra) || _is_tmp_reg(Rb))
+ tcg_abort();
+
+ if( disp != (int16_t)disp ) {
+ /* disp cannot be stored in insn directly */
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
+ tcg_out_inst4(s, OP_ADDSUBCMP, Rb, TMP_REG1, FUNC_ADDQ, TMP_REG1);
+ tcg_out_inst3_disp(s, opc, Ra, TMP_REG1, 0);
+ } else {
+ tcg_out_inst3_disp(s, opc, Ra, Rb, disp);
+ }
+
+ switch ( flags & 7) {
+ case 0:
+ case 1:
+ case 2|4:
+ case 3:
+ break;
+ case 0|4:
+ tcg_out_inst4(s, OP_SEXT, TCG_REG_31, Ra, FUNC_SEXTB, Ra);
+ break;
+ case 1|4:
+ tcg_out_inst4(s, OP_SEXT, TCG_REG_31, Ra, FUNC_SEXTW, Ra);
+ break;
+ case 2:
+ tcg_out_inst4i(s, OP_SHIFT, Ra, 32, FUNC_SLL, Ra);
+ tcg_out_inst4i(s, OP_SHIFT, Ra, 32, FUNC_SRL, Ra);
+ break;
+ default:
+ tcg_abort();
+ }
+}
+
+static inline void tgen_stxx( TCGContext *s, int Ra, int Rb, tcg_target_long disp, int flags)
+{
+ int opc_array[4] = { OP_STB, OP_STW, OP_STL, OP_STQ};
+ int opc = opc_array[flags & 3];
+
+ if( disp != (int16_t)disp ) {
+ /* disp cannot be stored in insn directly */
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
+ tcg_out_inst4(s, OP_ADDSUBCMP, Rb, TMP_REG1, FUNC_ADDQ, TMP_REG1);
+ tcg_out_inst3_disp(s, opc, Ra, TMP_REG1, 0);
+ } else {
+ tcg_out_inst3_disp(s, opc, Ra, Rb, disp);
+ }
+}
+
+static inline void tcg_out_op(TCGContext *s, \
+ int opc, const TCGArg *args, const int *const_args)
+{
+ int oc, c;
+ switch(opc)
+ {
+ case INDEX_op_exit_tb:
+ /*
+ * exit_tb t0, where t0 is always constant and should be returned to engine
+ * since we'll back to engine soon, $0 and $1 will never be used
+ */
+ tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_0, args[0]);
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)tb_ret_addr);
+ tcg_out_inst3_func(s, OP_JMP, TCG_REG_31, TMP_REG1, FUNC_JMP, 0);
+ break;
+
+ case INDEX_op_goto_tb:
+ /* goto_tb idx, where idx is constant 0 or 1, indicating the branch # */
+ if (s->tb_jmp_offset) {
+ /* we don't support direct jmp */
+ tcg_abort();
+ } else {
+ tcg_out_movi( s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)(s->tb_next + args[0]));
+ tcg_out_inst3_disp(s, OP_LDQ, TMP_REG1, TMP_REG1, 0);
+ tcg_out_inst3_func(s, OP_JMP, TCG_REG_31, TMP_REG1, FUNC_JMP, 0);
+ }
+ s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;
+ break;
+
+ case INDEX_op_call:
+ if (const_args[0]) {
+ tcg_abort();
+ } else {
+ tcg_out_push( s, TCG_REG_26);
+ tcg_out_push( s, TCG_REG_15);
+ tcg_out_mov( s, TCG_REG_27, args[0]);
+ tcg_out_inst3_func(s, OP_CALL, TCG_REG_26, args[0], FUNC_CALL, 0);
+ tcg_out_pop( s, TCG_REG_15);
+ tcg_out_pop( s, TCG_REG_26);
+ }
+ break;
+
+ case INDEX_op_jmp:
+ if (const_args[0]) {
+ tcg_abort();
+ } else {
+ tcg_out_inst3_func(s, OP_JMP, TCG_REG_31, args[0], FUNC_JMP, 0);
+ }
+ break;
+
+ case INDEX_op_br:
+ tcg_out_br(s, args[0]);
+ break;
+
+ case INDEX_op_ld8u_i32:
+ case INDEX_op_ld8u_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 0);
+ break;
+ case INDEX_op_ld8s_i32:
+ case INDEX_op_ld8s_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 0|4);
+ break;
+ case INDEX_op_ld16u_i32:
+ case INDEX_op_ld16u_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 1);
+ break;
+ case INDEX_op_ld16s_i32:
+ case INDEX_op_ld16s_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 1|4);
+ break;
+ case INDEX_op_ld32u_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 2);
+ break;
+ case INDEX_op_ld_i32:
+ case INDEX_op_ld32s_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 2|4);
+ break;
+ case INDEX_op_ld_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 3);
+ break;
+
+ case INDEX_op_st8_i32:
+ case INDEX_op_st8_i64:
+ tgen_stxx( s, args[0], args[1], args[2], 0);
+ break;
+ case INDEX_op_st16_i32:
+ case INDEX_op_st16_i64:
+ tgen_stxx( s, args[0], args[1], args[2], 1);
+ break;
+ case INDEX_op_st_i32:
+ case INDEX_op_st32_i64:
+ tgen_stxx( s, args[0], args[1], args[2], 2);
+ break;
+ case INDEX_op_st_i64:
+ tgen_stxx( s, args[0], args[1], args[2], 3);
+ break;
+
+ case INDEX_op_add_i32:
+ case INDEX_op_add_i64:
+ oc = OP_ADDSUBCMP;
+ c = FUNC_ADDQ;
+ goto gen_arith;
+ case INDEX_op_sub_i32:
+ case INDEX_op_sub_i64:
+ oc = OP_ADDSUBCMP;
+ c = FUNC_SUBQ;
+ goto gen_arith;
+ case INDEX_op_mul_i32:
+ oc = OP_MUL;
+ c = FUNC_MULL;
+ goto gen_arith;
+ case INDEX_op_mul_i64:
+ oc = OP_MUL;
+ c = FUNC_MULQ;
+ goto gen_arith;
+ case INDEX_op_and_i32:
+ case INDEX_op_and_i64:
+ oc = OP_LOGIC;
+ c = FUNC_AND;
+ goto gen_arith;
+ case INDEX_op_or_i32:
+ case INDEX_op_or_i64:
+ oc = OP_LOGIC;
+ c = FUNC_BIS;
+ goto gen_arith;
+ case INDEX_op_xor_i32:
+ case INDEX_op_xor_i64:
+ oc = OP_LOGIC;
+ c = FUNC_XOR;
+ goto gen_arith;
+ case INDEX_op_shl_i32:
+ case INDEX_op_shl_i64:
+ oc = OP_SHIFT;
+ c = FUNC_SLL;
+ goto gen_arith;
+ case INDEX_op_shr_i32:
+ tcg_out_inst4i(s, OP_SHIFT, args[1], 32, FUNC_SLL, args[1]);
+ tcg_out_inst4i(s, OP_SHIFT, args[1], 32, FUNC_SRL, args[1]);
+ case INDEX_op_shr_i64:
+ oc = OP_SHIFT;
+ c = FUNC_SRL;
+ goto gen_arith;
+ case INDEX_op_sar_i32:
+ tcg_out_inst4i(s, OP_SHIFT, args[1], 32, FUNC_SLL, args[1]);
+ tcg_out_inst4i(s, OP_SHIFT, args[1], 32, FUNC_SRA, args[1]);
+ case INDEX_op_sar_i64:
+ oc = OP_SHIFT;
+ c = FUNC_SRA;
+ gen_arith:
+ if (const_args[2]) {
+ tcg_abort();
+ } else {
+ tcg_out_inst4(s, oc, args[1], args[2], c, args[0]);
+ }
+ break;
+
+ case INDEX_op_brcond_i32:
+ tcg_out_mov(s, TMP_REG2, args[0]);
+ tcg_out_mov(s, TMP_REG3, args[1]);
+ if ( args[2] >= TCG_COND_LTU && args[2] <= TCG_COND_GTU) {
+ tcg_out_inst4i(s, OP_SHIFT, TMP_REG2, 32, FUNC_SLL, TMP_REG2);
+ tcg_out_inst4i(s, OP_SHIFT, TMP_REG2, 32, FUNC_SRL, TMP_REG2);
+ tcg_out_inst4i(s, OP_SHIFT, TMP_REG3, 32, FUNC_SLL, TMP_REG3);
+ tcg_out_inst4i(s, OP_SHIFT, TMP_REG3, 32, FUNC_SRL, TMP_REG3);
+ } else {
+ tcg_out_inst4i(s, OP_SHIFT, TMP_REG2, 32, FUNC_SLL, TMP_REG2);
+ tcg_out_inst4i(s, OP_SHIFT, TMP_REG2, 32, FUNC_SRA, TMP_REG2);
+ tcg_out_inst4i(s, OP_SHIFT, TMP_REG3, 32, FUNC_SLL, TMP_REG3);
+ tcg_out_inst4i(s, OP_SHIFT, TMP_REG3, 32, FUNC_SRA, TMP_REG3);
+ }
+ tcg_out_brcond(s, args[2], TMP_REG2, TMP_REG3, const_args[1], args[3]);
+ break;
+ case INDEX_op_brcond_i64:
+ tcg_out_brcond(s, args[2], args[0], args[1], const_args[1], args[3]);
+ break;
+
+ case INDEX_op_ext8s_i32:
+ case INDEX_op_ext8s_i64:
+ tcg_out_inst4(s, OP_SEXT, TCG_REG_31, args[1], FUNC_SEXTB, args[0]);
+ printf("ext8s met\n");
+ break;
+ case INDEX_op_ext16s_i32:
+ case INDEX_op_ext16s_i64:
+ tcg_out_inst4(s, OP_SEXT, TCG_REG_31, args[1], FUNC_SEXTW, args[0]);
+ printf("ext16s met\n");
+ break;
+
+ case INDEX_op_qemu_ld8u:
+ tcg_out_qemu_ld(s, args, 0);
+ break;
+ case INDEX_op_qemu_ld8s:
+ tcg_out_qemu_ld(s, args, 0 | 4);
+ break;
+ case INDEX_op_qemu_ld16u:
+ tcg_out_qemu_ld(s, args, 1);
+ break;
+ case INDEX_op_qemu_ld16s:
+ tcg_out_qemu_ld(s, args, 1 | 4);
+ break;
+ case INDEX_op_qemu_ld32u:
+ tcg_out_qemu_ld(s, args, 2);
+ break;
+ case INDEX_op_qemu_ld32s:
+ tcg_out_qemu_ld(s, args, 2 | 4);
+ break;
+ case INDEX_op_qemu_ld64:
+ tcg_out_qemu_ld(s, args, 3);
+ break;
+
+ case INDEX_op_qemu_st8:
+ tcg_out_qemu_st(s, args, 0);
+ break;
+ case INDEX_op_qemu_st16:
+ tcg_out_qemu_st(s, args, 1);
+ break;
+ case INDEX_op_qemu_st32:
+ tcg_out_qemu_st(s, args, 2);
+ break;
+ case INDEX_op_qemu_st64:
+ tcg_out_qemu_st(s, args, 3);
+ break;
+
+ case INDEX_op_movi_i32:
+ case INDEX_op_movi_i64:
+ case INDEX_op_mov_i32:
+ case INDEX_op_mov_i64:
+ case INDEX_op_div2_i32:
+ case INDEX_op_divu2_i32:
+ default:
+ tcg_abort();
+ }
+}
+
+static const TCGTargetOpDef alpha_op_defs[] = {
+ { INDEX_op_exit_tb, { } },
+ { INDEX_op_goto_tb, { } },
+ { INDEX_op_call, { "r" } },
+ { INDEX_op_jmp, { "r" } },
+ { INDEX_op_br, { } },
+
+ { INDEX_op_mov_i32, { "r", "r" } },
+ { INDEX_op_movi_i32, { "r" } },
+ { INDEX_op_ld8u_i32, { "r", "r" } },
+ { INDEX_op_ld8s_i32, { "r", "r" } },
+ { INDEX_op_ld16u_i32, { "r", "r" } },
+ { INDEX_op_ld16s_i32, { "r", "r" } },
+ { INDEX_op_ld_i32, { "r", "r" } },
+ { INDEX_op_st8_i32, { "r", "r" } },
+ { INDEX_op_st16_i32, { "r", "r" } },
+ { INDEX_op_st_i32, { "r", "r" } },
+
+ { INDEX_op_add_i32, { "r", "0", "r" } },
+ { INDEX_op_mul_i32, { "r", "0", "r" } },
+ //{ INDEX_op_div2_i32, { "a", "d", "0", "1", "r" } },
+ //{ INDEX_op_divu2_i32, { "a", "d", "0", "1", "r" } },
+ { INDEX_op_sub_i32, { "r", "0", "r" } },
+ { INDEX_op_and_i32, { "r", "0", "r" } },
+ { INDEX_op_or_i32, { "r", "0", "r" } },
+ { INDEX_op_xor_i32, { "r", "0", "r" } },
+
+ { INDEX_op_shl_i32, { "r", "0", "r" } },
+ { INDEX_op_shr_i32, { "r", "0", "r" } },
+ { INDEX_op_sar_i32, { "r", "0", "r" } },
+
+ { INDEX_op_brcond_i32, { "r", "r" } },
+
+ { INDEX_op_mov_i64, { "r", "r" } },
+ { INDEX_op_movi_i64, { "r" } },
+ { INDEX_op_ld8u_i64, { "r", "r" } },
+ { INDEX_op_ld8s_i64, { "r", "r" } },
+ { INDEX_op_ld16u_i64, { "r", "r" } },
+ { INDEX_op_ld16s_i64, { "r", "r" } },
+ { INDEX_op_ld32u_i64, { "r", "r" } },
+ { INDEX_op_ld32s_i64, { "r", "r" } },
+ { INDEX_op_ld_i64, { "r", "r" } },
+ { INDEX_op_st8_i64, { "r", "r" } },
+ { INDEX_op_st16_i64, { "r", "r" } },
+ { INDEX_op_st32_i64, { "r", "r" } },
+ { INDEX_op_st_i64, { "r", "r" } },
+
+ { INDEX_op_add_i64, { "r", "0", "r" } },
+ { INDEX_op_mul_i64, { "r", "0", "r" } },
+ //{ INDEX_op_div2_i64, { "a", "d", "0", "1", "r" } },
+ //{ INDEX_op_divu2_i64, { "a", "d", "0", "1", "r" } },
+ { INDEX_op_sub_i64, { "r", "0", "r" } },
+ { INDEX_op_and_i64, { "r", "0", "r" } },
+ { INDEX_op_or_i64, { "r", "0", "r" } },
+ { INDEX_op_xor_i64, { "r", "0", "r" } },
+
+ { INDEX_op_shl_i64, { "r", "0", "r" } },
+ { INDEX_op_shr_i64, { "r", "0", "r" } },
+ { INDEX_op_sar_i64, { "r", "0", "r" } },
+
+ { INDEX_op_brcond_i64, { "r", "r" } },
+
+ { INDEX_op_ext8s_i32, { "r", "r"} },
+ { INDEX_op_ext16s_i32, { "r", "r"} },
+ { INDEX_op_ext8s_i64, { "r", "r"} },
+ { INDEX_op_ext16s_i64, { "r", "r"} },
+
+ { INDEX_op_qemu_ld8u, { "r", "L" } },
+ { INDEX_op_qemu_ld8s, { "r", "L" } },
+ { INDEX_op_qemu_ld16u, { "r", "L" } },
+ { INDEX_op_qemu_ld16s, { "r", "L" } },
+ { INDEX_op_qemu_ld32u, { "r", "L" } },
+ { INDEX_op_qemu_ld32s, { "r", "L" } },
+ { INDEX_op_qemu_ld64, { "r", "L" } },
+
+ { INDEX_op_qemu_st8, { "L", "L" } },
+ { INDEX_op_qemu_st16, { "L", "L" } },
+ { INDEX_op_qemu_st32, { "L", "L" } },
+ //{ INDEX_op_qemu_st64, { "L", "L", "L"} },
+ { INDEX_op_qemu_st64, { "L", "L"} },
+ { -1 },
+};
+
+
+static int tcg_target_callee_save_regs[] = {
+ TCG_REG_15, // used for the global env, so no need to save
+ TCG_REG_9,
+ TCG_REG_10,
+ TCG_REG_11,
+ TCG_REG_12,
+ TCG_REG_13,
+ TCG_REG_14
+};
+
+/*
+ * Generate global QEMU prologue and epilogue code
+*/
+void tcg_target_qemu_prologue(TCGContext *s)
+{
+ int i, frame_size, push_size, stack_addend;
+
+ /* TB prologue */
+ /*printf("TB prologue @ %lx\n", s->code_ptr);*/
+
+ /* save TCG_REG_26 */
+ tcg_out_push(s, TCG_REG_26);
+ tcg_out_push(s, TCG_REG_27);
+ tcg_out_push(s, TCG_REG_28);
+ tcg_out_push(s, TCG_REG_29);
+
+ /* save all callee saved registers */
+ for(i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
+ tcg_out_push(s, tcg_target_callee_save_regs[i]);
+ }
+
+ /* reserve some stack space */
+ push_size = 8 + (4 + ARRAY_SIZE(tcg_target_callee_save_regs)) * 8;
+ frame_size = push_size + 4*TCG_STATIC_CALL_ARGS_SIZE;
+ frame_size = (frame_size + TCG_TARGET_STACK_ALIGN - 1) & ~(TCG_TARGET_STACK_ALIGN - 1);
+ stack_addend = frame_size - push_size;
+ tcg_out_addi(s, TCG_REG_30, -stack_addend);
+
+ tcg_out_inst3_func(s, OP_JMP, TCG_REG_31, TCG_REG_16, FUNC_JMP, 0); /* jmp $16 */
+
+ /* TB epilogue */
+ tb_ret_addr = s->code_ptr;
+ tcg_out_addi(s, TCG_REG_30, stack_addend);
+ for(i = ARRAY_SIZE(tcg_target_callee_save_regs) - 1; i >= 0; i--) {
+ tcg_out_pop(s, tcg_target_callee_save_regs[i]);
+ }
+
+ tcg_out_pop(s, TCG_REG_29);
+ tcg_out_pop(s, TCG_REG_28);
+ tcg_out_pop(s, TCG_REG_27);
+ tcg_out_pop(s, TCG_REG_26);
+ tcg_out_inst3_func(s, OP_RET, TCG_REG_31, TCG_REG_26, FUNC_RET, 0); /* ret */
+}
+
+
+void tcg_target_init(TCGContext *s)
+{
+ /* fail safe */
+ if ((1 << CPU_TLB_ENTRY_BITS) != sizeof(CPUTLBEntry))
+ tcg_abort();
+
+ tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffffffff);
+ tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffffffff);
+ tcg_regset_set32(tcg_target_call_clobber_regs, 0,
+ (1 << TCG_REG_1 ) | (1 << TCG_REG_2 ) | (1 << TCG_REG_3 ) | (1 << TCG_REG_4 ) |
+ (1 << TCG_REG_5 ) | (1 << TCG_REG_6 ) | (1 << TCG_REG_7 ) | (1 << TCG_REG_8 ) |
+ (1 << TCG_REG_22) | (1 << TCG_REG_23) | (1 << TCG_REG_24) | (1 << TCG_REG_25) |
+ (1 << TCG_REG_16) | (1 << TCG_REG_17) | (1 << TCG_REG_18) | (1 << TCG_REG_19) |
+ (1 << TCG_REG_20) | (1 << TCG_REG_21) | (1 << TCG_REG_0 ));
+
+ //tcg_regset_set32( tcg_target_call_clobber_regs, 0, 0xffffffff);
+
+ tcg_regset_clear(s->reserved_regs);
+ // $26~$31 not allocated by tcg.c
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_26);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_27);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_28);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_29);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_30);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_31);
+ // resved registers for tmp usage
+ tcg_regset_set_reg(s->reserved_regs, TMP_REG1);
+ tcg_regset_set_reg(s->reserved_regs, TMP_REG2);
+ tcg_regset_set_reg(s->reserved_regs, TMP_REG3);
+
+ tcg_add_target_add_op_defs(alpha_op_defs);
+}
+
diff --git a/tcg/alpha/tcg-target.h b/tcg/alpha/tcg-target.h
new file mode 100644
index 0000000..3c15a15
--- /dev/null
+++ b/tcg/alpha/tcg-target.h
@@ -0,0 +1,70 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#define TCG_TARGET_ALPHA 1
+
+#define TCG_TARGET_REG_BITS 64
+
+#define TCG_TARGET_NB_REGS 32
+
+enum {
+ TCG_REG_0 = 0, TCG_REG_1, TCG_REG_2, TCG_REG_3,
+ TCG_REG_4, TCG_REG_5, TCG_REG_6, TCG_REG_7,
+ TCG_REG_8, TCG_REG_9, TCG_REG_10, TCG_REG_11,
+ TCG_REG_12, TCG_REG_13, TCG_REG_14, TCG_REG_15,
+ TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19,
+ TCG_REG_20, TCG_REG_21, TCG_REG_22, TCG_REG_23,
+ TCG_REG_24, TCG_REG_25, TCG_REG_26, TCG_REG_27,
+ TCG_REG_28, TCG_REG_29, TCG_REG_30, TCG_REG_31
+};
+
+/* used for function call generation */
+#define TCG_REG_CALL_STACK TCG_REG_30
+#define TCG_TARGET_STACK_ALIGN 16
+#define TCG_TARGET_CALL_STACK_OFFSET 0
+
+/* we have signed extension instructions */
+#define TCG_TARGET_HAS_ext8s_i32
+#define TCG_TARGET_HAS_ext16s_i32
+#define TCG_TARGET_HAS_ext8s_i64
+#define TCG_TARGET_HAS_ext16s_i64
+//#define TCG_TARGET_HAS_ext32s_i64
+
+/* Note: must be synced with dyngen-exec.h */
+#define TCG_AREG0 TCG_REG_15
+#define TCG_AREG1 TCG_REG_9
+#define TCG_AREG2 TCG_REG_10
+#define TCG_AREG3 TCG_REG_11
+#define TCG_AREG4 TCG_REG_12
+#define TCG_AREG5 TCG_REG_13
+#define TCG_AREG6 TCG_REG_14
+
+#define TMP_REG1 TCG_REG_23
+#define TMP_REG2 TCG_REG_24
+#define TMP_REG3 TCG_REG_25
+
+static inline void flush_icache_range(unsigned long start, unsigned long stop)
+{
+ __asm__ __volatile__ ("call_pal 0x86");
+}
+
--
1.6.3.3
___________________________________________________________
好玩贺卡等你发，邮箱贺卡全新上线！
http://card.mail.cn.yahoo.com/
^ permalink raw reply related [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-19 8:47 identifier scorpio
@ 2010-01-19 20:18 ` Richard Henderson
2010-01-19 21:35 ` malc
2010-01-19 21:42 ` Stefan Weil
1 sibling, 1 reply; 21+ messages in thread
From: Richard Henderson @ 2010-01-19 20:18 UTC (permalink / raw)
To: identifier scorpio; +Cc: qemu-devel
On 01/19/2010 12:47 AM, identifier scorpio wrote:
> I ported TCG to alpha platform, the patch is currently based on stable-0.10 branch,
> and now it can run linux-0.2.img testing image on my alpha XP1000 workstation.
> but it still can't run MS-windows, and I hope someone, especially those guys that
> are working on target-alpha, may help me to find the bugs.
Your patch is mangled. If you can't use sendmail directly, then attach
the patch.
> +/*
> + * $26 ~ $31 are special, reserved,
> + * and $25 is deliberately reserved for jcc operation
> + * and $0 is usually used for return function result, better allocate it later
> + * and $15 is used for cpu_env pointer, allocate it at last
> +*/
I don't see any reason why $28 should be reserved, particularly.
Although I'd use it as a temporary before anything else. I expect that
you could get away with not reserving $26 and $27 as well, and simply
know that it's free since only $16-$21 have values at the point of a
call and all others have no live values.
> +static const int tcg_target_reg_alloc_order[] = {
> + TCG_REG_1, TCG_REG_2, TCG_REG_3, TCG_REG_4, TCG_REG_5, TCG_REG_6,
> + TCG_REG_7, TCG_REG_8, TCG_REG_22,
> + TCG_REG_9, TCG_REG_10, TCG_REG_11, TCG_REG_12, TCG_REG_13, TCG_REG_14,
> + TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19, TCG_REG_20, TCG_REG_21
> +};
Existing targets put call-saved registers at the front of the allocation
order. From looking at tcg.c, I think the only way values actually get
saved across calls is to already happen to be allocated to a call-saved
register.
> +#define OP_ADDSUBCMP 0x10
> +#define FUNC_ADDL 0x00
> +#define FUNC_SUBL 0x09
> +#define FUNC_ADDQ 0x20
Things might be a bit cleaner if you pre-assembled these values and
passed only one value to the tcg_out_* routines. E.g.
#define INSN_ADDQ ((0x10 << 26) | (0x20 << 5))
Compare the sparc port, for example.
> +static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
> +{
> + const char *ct_str = *pct_str;
> +
> + switch(ct_str[0])
> + {
> + case 'r':
...
> + case 'L':
Do you really need extra temporaries for L? You already have 3.
You'd also do well to define I,J,K constraints for constants (mirroring
gcc's letters for clarity).
> +static inline void tcg_out_inst2(TCGContext *s, int Opcode, int Ra, int Disp)
> +static inline void tcg_out_inst3_disp(TCGContext *s, int Opcode, int Ra, int Rb, int Disp)
> +static inline void tcg_out_inst3_func(TCGContext *s, int Opcode, int Ra, int Rb, int Func, int Disp)
> +static inline void tcg_out_inst4(TCGContext *s, int Opcode, int Ra, int Rb, int Func, int Rc)
> +static inline void tcg_out_inst4i(TCGContext *s, int Opcode, int Ra, int Lit, int Func, int Rc)
inst2, inst3, inst4 isn't very descriptive. How about nice names like
tcg_out_fmt_mem // memory format w/ displacement
tcg_out_fmt_opr // operate format w/ register
tcg_out_fmt_opi // operate format w/ immediate
tcg_out_fmt_jmp // jump instruction format
> +/*
> + * mov a 64-bit immediate 'arg' to regsiter 'Ra', this function will
> + * generate fixed length (8 insns, 32 bytes) of target insn sequence.
> +*/
> +static void tcg_out_movi_fixl( \
> + TCGContext *s, TCGType type, int Ra, tcg_target_long arg)
Err.. "8 insns"? You'd only ever need to output 5. Also, why would you
ever want to explicitly never elide one of these insns if you could?
Say, if only L0 and L3 were non-zero?
> +/*
> + * mov 64-bit immediate 'arg' to regsiter 'Ra'. this function will
> + * generate variable length of target insn sequence.
> +*/
> +static inline void tcg_out_movi( \
> + TCGContext *s, TCGType type, int Ra, tcg_target_long arg)
> +{
> + if (type == TCG_TYPE_I32) {
> + if ( arg != (int32_t)arg)
> + tcg_abort();
Well that's most likely a bug. If I32 then I'd consider the high bits
garbage. I don't recall any promise that TCG sign-extends 32-bit inputs.
> + if (arg == 0) {
> + tcg_out_inst4(s, OP_LOGIC, Ra, Ra, FUNC_XOR, Ra);
Err, don't xor and create a false dependency on the previous contents.
Either do a move from the zero register, or better don't special case
this at all and generate the zero from ...
> + else if( arg == (int16_t)arg ) {
> + tcg_out_inst3_disp(s, OP_LDA, Ra, TCG_REG_31, arg );
> + }
... here. Watch your formatting as well.
> + else if( arg == (int32_t)arg ) {
> + tcg_out_inst3_disp(s, OP_LDAH, Ra, TCG_REG_31, (arg>>16));
> + if( arg& ((tcg_target_ulong)0x8000) ) {
> + tcg_out_inst3_disp(s, OP_LDAH, Ra, Ra, 1);
> + }
You are emitting an unnecessary instruction most of the time here. You
should increment the LDAH constant except for the case that it overflows.
However, I'd say that the best way to rearrange all of this is:
void tcg_out_op_long(TCGContext *s, int opc,
int Ra, int Rb, tcg_target_long val)
{
int l0, l1a, l1b = 0, l2 = 0, l3 = 0;
long val = orig;
int Rs;
switch (opc) {
case INSN_STB:
case INSN_STW:
case INSN_STL:
case INSN_STQ:
assert(Ra != TCG_REG_28);
Rs = TCG_REG_28;
break;
default:
Rs = (Rb != Ra ? Ra : TCG_REG_28);
break;
}
l0 = (int16_t)val;
val = (val - l0) >> 16;
l1a = (int16_t)val;
if (orig >> 31 == -1 || orig >> 31 == 0) {
if (l1a < 0 && orig >= 0) {
l1b = 0x4000;
l1a = (int16_t)(val - 0x4000);
}
} else {
val = (val - l1a) >> 16;
l2 = (int16_t)val;
val = (val - l2) >> 16;
l3 = (int16_t)val;
assert(Rs != Rb);
if (l3) {
tcg_out_fmt_mem(s, INSN_LDAH, Rs, TCG_REG_ZERO, l3);
}
if (l2) {
tcg_out_fmt_mem(s, INSN_LDA, Rs, Rs, l2);
}
tcg_out_fmt_opi(s, INSN_SLL, Rs, Rs, 32);
if (Rb != TCG_REG_ZERO) {
tcg_out_fmt_opr(s, INSN_ADDQ, Rs, Rs, Rb);
}
Rb = Rs;
}
if (l1a) {
tcg_out_fmt_mem(s, INSN_LDAH, Rs, Rb, l1a);
Rb = Rs;
}
if (l1b) {
tcg_out_fmt_mem(s, INSN_LDAH, Rs, Rb, l1b);
Rb = Rs;
}
if (l0 || opc != INSN_LDA || Rb != Ra) {
tcg_opc_fmt_mem(s, opc, Ra, Rb, l0);
}
}
With a function like this you get
void tcg_out_movi(TCGContext *s, TCGType type, int Ra,
tcg_target_long c)
{
if (type == TCG_TYPE_I32) {
c = (int32_t)c;
}
tcg_out_opc_long(s, INSN_LDA, Ra, TCG_REG_ZERO, c);
}
void tcg_out_ld(TCGContext *s, TCGType type, int Ra, int Rb,
tcg_target_long disp)
{
tcg_out_opc_long(s, type == TCG_TYPE_I32 ? INSN_LDL : INSN_LDQ,
Ra, Rb, disp);
}
void tcg_out_st(TCGContext *s, TCGType type, int Ra, int Rb,
tcg_target_long disp)
{
tcg_out_opc_long(s, type == TCG_TYPE_I32 ? INSN_STL : INSN_STQ,
Ra, Rb, disp);
}
void tcg_out_addi(TCGContext *s, int Ra, tcg_target_long val)
{
tcg_out_opc_long(s, INSN_LDA, Ra, Ra, val);
}
> +static inline void tgen_arithi( \
> + TCGContext *s, int Opcode, int Func, int Ra, tcg_target_long val)
> +{
> + if (val == (uint8_t)val) {
> + tcg_out_inst4i(s, Opcode, Ra, val, Func, Ra);
> + } else {
> + tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, val);
> + tcg_out_inst4(s, Opcode, Ra, TMP_REG1, Func, Ra);
> + }
With I/J constraints you don't need this special casing.
> +static inline void tcg_out_push(TCGContext *s, int reg)
> +static inline void tcg_out_pop(TCGContext *s, int reg)
You ought not need this, writing the prologue/epilogue properly. You
certainly don't want to adjust the stack pointer that many times.
> +static void tcg_out_br(TCGContext *s, int label_index)
> +{
> + TCGLabel *l =&s->labels[label_index];
> +
> + if (l->has_value) {
> + tcg_target_long val;
> + if ( l->u.value& 0x3)
> + tcg_abort();
> + val = ((tcg_target_long)(l->u.value) - (tcg_target_long)s->code_ptr - 4)>> 2;
> + if ( val>= -0x100000&& val< 0x100000) {
> + // if distance can be put into 21-bit field
> + tcg_out_inst2(s, OP_BR, TMP_REG1, val);
> + } else {
> + tcg_abort();
> + }
> + } else {
> + /* record relocation infor */
> + tcg_out_reloc(s, s->code_ptr, R_ALPHA_REFQUAD, label_index, 0);
> + s->code_ptr += 4;
I realize that it doesn't really matter what value you use here, so long
as things are consistent with patch_reloc, but it'll be less confusing
if you use the proper relocation type: R_ALPHA_BRADDR.
> +static void tcg_out_brcond( TCGContext *s, int cond, \
> + TCGArg arg1, TCGArg arg2, int const_arg2, int label_index)
> +{
> + int func, opc;
> + TCGLabel *l =&s->labels[label_index];
> +
> + if ( cond< TCG_COND_EQ || cond> TCG_COND_GTU || const_arg2)
> + tcg_abort();
> +
> + func = tcg_cond_to_jcc[cond];
> + tcg_out_inst4(s, OP_ADDSUBCMP, arg1, arg2, func, TMP_REG1);
> +
> + // if cond is an odd number, TMP_REG1 = 0 means true
> + opc = (cond& 1) ? OP_BLBC : OP_BLBS;
> +
> + if (l->has_value) {
> + tcg_target_long val;
> + if ( l->u.value& 3)
> + tcg_abort();
> + val = ((tcg_target_long)l->u.value - (tcg_target_long)s->code_ptr - 4)>> 2;
> + if ( val>= -0x100000&& val< 0x100000) {
> + // if distance can be put into 21-bit field
> + tcg_out_inst2(s, opc, TMP_REG1, val);
> + } else {
> + tcg_abort();
> + }
> + } else {
> + tcg_out_inst2(s, opc^4, TMP_REG1, 1);
> + /* record relocation infor */
> + tcg_out_reloc(s, s->code_ptr, R_ALPHA_REFQUAD, label_index, 0);
> + s->code_ptr += 4;
Bug: You've applied the relocation to the wrong instruction.
Bug: What's with the "opc^4"?
You'd do well to avoid duplication between tcg_out_brcond and tcg_out_br
by passing in the branch opcode to tcg_out_br.
> + /* if VM is of 32-bit arch, clear higher 32-bit of addr */
Use a zapnot insn for this.
> + case INDEX_op_call:
> + if (const_args[0]) {
> + tcg_abort();
> + } else {
> + tcg_out_push( s, TCG_REG_26);
> + tcg_out_push( s, TCG_REG_15);
> + tcg_out_mov( s, TCG_REG_27, args[0]);
> + tcg_out_inst3_func(s, OP_CALL, TCG_REG_26, args[0], FUNC_CALL, 0);
> + tcg_out_pop( s, TCG_REG_15);
> + tcg_out_pop( s, TCG_REG_26);
You don't need to push/pop anything here. $26 should be saved by the
prologue we emitted, and $15 is call-saved. What you could usefully do
is define a register constraint for $27 so that TCG automatically loads
the value into that register and saves you a register move here.
> + case INDEX_op_and_i32:
> + case INDEX_op_and_i64:
> + oc = OP_LOGIC;
> + c = FUNC_AND;
> + goto gen_arith;
You'd do well to recognize zapnot constants. They are very common.
> + tcg_out_inst4i(s, OP_SHIFT, args[1], 32, FUNC_SLL, args[1]);
> + tcg_out_inst4i(s, OP_SHIFT, args[1], 32, FUNC_SRL, args[1]);
zapnot.
> + case INDEX_op_sar_i32:
> + tcg_out_inst4i(s, OP_SHIFT, args[1], 32, FUNC_SLL, args[1]);
> + tcg_out_inst4i(s, OP_SHIFT, args[1], 32, FUNC_SRA, args[1]);
That last shift can be combined with the requested shift via addition.
For constant input, this saves an insn; for register input, the addition
can be done in parallel with the first shift.
> + case INDEX_op_brcond_i32:
> + tcg_out_mov(s, TMP_REG2, args[0]);
> + tcg_out_mov(s, TMP_REG3, args[1]);
> + if ( args[2]>= TCG_COND_LTU&& args[2]<= TCG_COND_GTU) {
> + tcg_out_inst4i(s, OP_SHIFT, TMP_REG2, 32, FUNC_SLL, TMP_REG2);
> + tcg_out_inst4i(s, OP_SHIFT, TMP_REG2, 32, FUNC_SRL, TMP_REG2);
> + tcg_out_inst4i(s, OP_SHIFT, TMP_REG3, 32, FUNC_SLL, TMP_REG3);
> + tcg_out_inst4i(s, OP_SHIFT, TMP_REG3, 32, FUNC_SRL, TMP_REG3);
> + } else {
> + tcg_out_inst4i(s, OP_SHIFT, TMP_REG2, 32, FUNC_SLL, TMP_REG2);
> + tcg_out_inst4i(s, OP_SHIFT, TMP_REG2, 32, FUNC_SRA, TMP_REG2);
> + tcg_out_inst4i(s, OP_SHIFT, TMP_REG3, 32, FUNC_SLL, TMP_REG3);
> + tcg_out_inst4i(s, OP_SHIFT, TMP_REG3, 32, FUNC_SRA, TMP_REG3);
For comparing 32-bit inputs, it doesn't actually matter how you extend
the inputs, so long as you do it the same for both inputs. Therefore
the best solution here is to sign-extend both inputs with "addl r,0,r".
Note as well that you don't need temporaries, as the inputs only have
32-bits defined; high bits are garbage in, garbage out.
> + case INDEX_op_ext8s_i32:
> + case INDEX_op_ext8s_i64:
> + tcg_out_inst4(s, OP_SEXT, TCG_REG_31, args[1], FUNC_SEXTB, args[0]);
> + printf("ext8s met\n");
> + break;
> + case INDEX_op_ext16s_i32:
> + case INDEX_op_ext16s_i64:
> + tcg_out_inst4(s, OP_SEXT, TCG_REG_31, args[1], FUNC_SEXTW, args[0]);
> + printf("ext16s met\n");
> + break;
You'll also want to define INDEX_op_ext32s_i64 as "addl r,0,r".
> + case INDEX_op_div2_i32:
> + case INDEX_op_divu2_i32:
Don't define these, but you will need to define
div_i32, divu_i32, rem_i32, remu_i32
div_i64, divu_i64, rem_i64, remu_i64
The easiest way to do this is to emit calls to the compiler support
routines directly. They have special call conventions, which should be
easy enough to satisfy from within the code generator:
* The alpha chip doesn't provide hardware division, so we have to do it
* by hand. The compiler expects the functions
*
* __divqu: 64-bit unsigned long divide
* __remqu: 64-bit unsigned long remainder
* __divqs/__remqs: signed 64-bit
* __divlu/__remlu: unsigned 32-bit
* __divls/__remls: signed 32-bit
*
* These are not normal C functions: instead of the normal
* calling sequence, these expect their arguments in registers
* $24 and $25, and return the result in $27. Register $28 may
* be clobbered (assembly temporary), anything else must be saved.
* The return address is in $23.
There's a note in gcc sources re the 32-bit routines:
;; ??? Force sign-extension here because some versions of OSF/1 and
;; Interix/NT don't do the right thing if the inputs are not properly
;; sign-extended. But Linux, for instance, does not have this
;; problem. Is it worth the complication here to eliminate the sign
;; extension?
Note as well the register constraints from gcc:
"a" = $24
"b" = $25
"c" = $27
All this suggests that $24, $25, $27 should *not* be reserved, so that
TCG can put inputs into the proper places for both division and calls.
> + tcg_out_push(s, TCG_REG_26);
> + tcg_out_push(s, TCG_REG_27);
> + tcg_out_push(s, TCG_REG_28);
> + tcg_out_push(s, TCG_REG_29);
Of these only $26 needs to be saved.
What would be very interesting to do would be to set up a "constant
pool" with all of the helper function addresses (including the division
routines) and point $29 at it in the prologue. I suspect that this
would significantly reduce the amount of code generated for the calling
the helpers.
Note that this $29 would have to be reloaded after calls. If you can
prove that the constant pool address is within 32-bits of the entire
code_gen_buffer, then you can reload $29 as the compiler does -- with an
LDAH+LDA pair. Otherwise you could reserve a slot in the stack frame to
hold the address of the constant pool, and reload $29 via a normal load
from the stack frame.
Alternately, you could experiment with reserving another call-saved
register and use that instead of $29. This call-saved register would
not need to be reloaded after calls.
Note that if you don't use $29 for a constant pool, it's perfectly valid
to use it as either a reserved temporary, or for allocation by TCG.
r~
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-19 20:18 ` Richard Henderson
@ 2010-01-19 21:35 ` malc
0 siblings, 0 replies; 21+ messages in thread
From: malc @ 2010-01-19 21:35 UTC (permalink / raw)
To: Richard Henderson; +Cc: identifier scorpio, qemu-devel
On Tue, 19 Jan 2010, Richard Henderson wrote:
> On 01/19/2010 12:47 AM, identifier scorpio wrote:
> > I ported TCG to alpha platform, the patch is currently based on stable-0.10
> > branch,
> > and now it can run linux-0.2.img testing image on my alpha XP1000
> > workstation.
> > but it still can't run MS-windows, and I hope someone, especially those guys
> > that
> > are working on target-alpha, may help me to find the bugs.
>
> Your patch is mangled. If you can't use sendmail directly, then attach the
> patch.
[..snip..]
> > +/*
> > + * mov 64-bit immediate 'arg' to regsiter 'Ra'. this function will
> > + * generate variable length of target insn sequence.
> > +*/
> > +static inline void tcg_out_movi( \
> > + TCGContext *s, TCGType type, int Ra, tcg_target_long arg)
> > +{
> > + if (type == TCG_TYPE_I32) {
> > + if ( arg != (int32_t)arg)
> > + tcg_abort();
>
> Well that's most likely a bug. If I32 then I'd consider the high bits
> garbage. I don't recall any promise that TCG sign-extends 32-bit inputs.
They are garbage, see f.e. 591d6f1dfdb60ab0a4cc487cd5781fa799dcac4b
[..snip..]
>
>
> r~
>
Thanks for reviewing it!
--
mailto:av1474@comtv.ru
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-19 8:47 identifier scorpio
2010-01-19 20:18 ` Richard Henderson
@ 2010-01-19 21:42 ` Stefan Weil
1 sibling, 0 replies; 21+ messages in thread
From: Stefan Weil @ 2010-01-19 21:42 UTC (permalink / raw)
To: identifier scorpio; +Cc: qemu-devel
identifier scorpio schrieb:
> Hello.
>
> I ported TCG to alpha platform, the patch is currently based on stable-0.10 branch, and now it can run linux-0.2.img testing image on my alpha XP1000 workstation. but it still can't run MS-windows, and I hope someone, especially those guys that are working on target-alpha, may help me to find the bugs.
>
> From 0ee33ea1e43298e6045e16dfcf07cb7a530dfd56 Mon Sep 17 00:00:00 2001
> From: Dong Weiyu <cidentifier@yahoo.com.cn>
> Date: Tue, 19 Jan 2010 16:22:54 +0800
> Subject: [PATCH] porting TCG to alpha platform.
>
> ---
> cpu-all.h | 2 +-
> tcg/alpha/tcg-target.c | 1335 ++++++++++++++++++++++++++++++++++++++++++++++++
> tcg/alpha/tcg-target.h | 70 +++
> 3 files changed, 1406 insertions(+), 1 deletions(-)
> create mode 100644 tcg/alpha/tcg-target.c
> create mode 100644 tcg/alpha/tcg-target.h
>
Maybe you can also try the TCG interpreter (TCI) from
http://repo.or.cz/w/qemu/ar7.git.
In theory, it supports any host architecture with or without native TCG
support.
It was tested successful with some basic tests on x86, mips, ppc and arm,
so I hope it will run on alpha, too.
Kind regards,
Stefan Weil
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
@ 2010-01-20 17:19 identifier scorpio
2010-01-20 21:26 ` Richard Henderson
0 siblings, 1 reply; 21+ messages in thread
From: identifier scorpio @ 2010-01-20 17:19 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel
[-- Attachment #1: Type: text/plain, Size: 49081 bytes --]
Thank you all, especially Richard, for reviewing, and I'v partly amended my code according to you advices, but the result is not very encouraging, I can still run linux-0.2.img image and still can't run MS windows. I think that most of your advices are related to performance and may significantly reduce the TB size. Below i'll append my newly generated patch against stable-0.10, in case it is mangled, i also put it in the attachment.
now I have some answers for your doubts.
> > +static int target_parse_constraint(TCGArgConstraint
> *ct, const char **pct_str)
> > +{
> > + const char *ct_str = *pct_str;
> > +
> > + switch(ct_str[0])
> > + {
> > + case 'r':
> ...
> > + case 'L':
>
> Do you really need extra temporaries for L? You
> already have 3.
in qemu_ld/st, we must use $16,$17,$18 as temporaries, because pass them as argument to helper functions such as qemu_ld/st_helpers[].
...
> Err.. "8 insns"? You'd only ever need to output
> 5. Also, why would you ever want to explicitly never
> elide one of these insns if you could? Say, if only L0 and
> L3 were non-zero?
>
yes, the number of output instructions is 5, and my comment is a bit out-of-date.
your method here is more elegant and I'll migrate to your "tcg_out_op_long()" version tomorrow.
...
> With I/J constraints you don't need this special casing.
I'm not very familiar with I/J constraints and i'll study them later.
...
> > + tcg_out_reloc(s,
> s->code_ptr, R_ALPHA_REFQUAD, label_index, 0);
> > + s->code_ptr += 4;
>
> I realize that it doesn't really matter what value you use
> here, so long as things are consistent with patch_reloc, but
> it'll be less confusing if you use the proper relocation
> type: R_ALPHA_BRADDR.
>
you are right, R_ALPHA_BRADDR is more clear.
...
> > + tcg_out_inst2(s, opc^4,
> TMP_REG1, 1);
> > + /* record relocation infor */
> > + tcg_out_reloc(s,
> s->code_ptr, R_ALPHA_REFQUAD, label_index, 0);
> > + s->code_ptr += 4;
>
> Bug: You've applied the relocation to the wrong
> instruction.
> Bug: What's with the "opc^4"?
>
what did you mean that i "applied the relocation to the wrong
instruction", couldn't i apply relocation to INDEX_op_brcond_i32 operation?
and opc^4 here is used to toggle between OP_BLBC(opcode 0x38) and OP_BLBS(opcode 0x3c), ugly code :)
...
> > + /* if VM is of 32-bit arch, clear
> higher 32-bit of addr */
>
> Use a zapnot insn for this.
zapnot is a good thing.
...
> You don't need to push/pop anything here. $26 should
> be saved by the prologue we emitted, and $15 is
> call-saved. What you could usefully do is define a
> register constraint for $27 so that TCG automatically loads
> the value into that register and saves you a register move
> here.
I push/pop them here just for safe.
>
> > + case INDEX_op_sar_i32:
> > + tcg_out_inst4i(s,
> OP_SHIFT, args[1], 32, FUNC_SLL, args[1]);
> > + tcg_out_inst4i(s,
> OP_SHIFT, args[1], 32, FUNC_SRA, args[1]);
>
> That last shift can be combined with the requested shift
> via addition. For constant input, this saves an insn; for
> register input, the addition can be done in parallel with
> the first shift.
i changed to use "addl r, 0, r" here.
> For comparing 32-bit inputs, it doesn't actually matter how
> you extend the inputs, so long as you do it the same for
> both inputs. Therefore the best solution here is to
> sign-extend both inputs with "addl r,0,r". Note as
> well that you don't need temporaries, as the inputs only
> have 32-bits defined; high bits are garbage in, garbage
> out.
i changed to use "addl r, 0, r" here too.
> You'll also want to define INDEX_op_ext32s_i64 as "addl r,0,r".
added.
> > + case INDEX_op_div2_i32:
> > + case INDEX_op_divu2_i32:
>
> Don't define these, but you will need to define
>
> div_i32, divu_i32, rem_i32, remu_i32
> div_i64, divu_i64, rem_i64, remu_i64
I think when qemu met x86 divide instructions, it will call helper functions to simulate them, must i define div_i32/divu_i32/...?
...
> > + tcg_out_push(s, TCG_REG_26);
> > + tcg_out_push(s, TCG_REG_27);
> > + tcg_out_push(s, TCG_REG_28);
> > + tcg_out_push(s, TCG_REG_29);
>
> Of these only $26 needs to be saved.
also, i save them for safe.
++++++++++++++++++++++++++++++++++
below is the newest patch ...
From 7cc2acddfb7333ab3f1f6b17fa8fa5dcdd3c0095 Mon Sep 17 00:00:00 2001
From: Dong Weiyu <cidentifier@yahoo.com.cn>
Date: Wed, 20 Jan 2010 23:48:55 +0800
Subject: [PATCH] Porting TCG to alpha platform.
---
cpu-all.h | 2 +-
tcg/alpha/tcg-target.c | 1196 ++++++++++++++++++++++++++++++++++++++++++++++++
tcg/alpha/tcg-target.h | 70 +++
3 files changed, 1267 insertions(+), 1 deletions(-)
create mode 100644 tcg/alpha/tcg-target.c
create mode 100644 tcg/alpha/tcg-target.h
diff --git a/cpu-all.h b/cpu-all.h
index e0c3efd..bdf6fb2 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -22,7 +22,7 @@
#include "qemu-common.h"
-#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__)
+#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__) || defined(__alpha__)
#define WORDS_ALIGNED
#endif
diff --git a/tcg/alpha/tcg-target.c b/tcg/alpha/tcg-target.c
new file mode 100644
index 0000000..143f576
--- /dev/null
+++ b/tcg/alpha/tcg-target.c
@@ -0,0 +1,1196 @@
+/*
+ * Tiny Code Generator for QEMU on ALPHA platform
+*/
+
+#ifndef NDEBUG
+static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
+ "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
+ "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
+ "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
+ "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31",
+};
+#endif
+
+/*
+ * $26 ~ $31 are special, reserved,
+ * and $25 is deliberately reserved for jcc operation
+ * and $0 is usually used for return function result, better allocate it later
+ * and $15 is used for cpu_env pointer, allocate it at last
+*/
+static const int tcg_target_reg_alloc_order[] = {
+ TCG_REG_9, TCG_REG_10, TCG_REG_11, TCG_REG_12, TCG_REG_13, TCG_REG_14,
+ TCG_REG_1, TCG_REG_2, TCG_REG_3, TCG_REG_4, TCG_REG_5, TCG_REG_6,
+ TCG_REG_7, TCG_REG_8, TCG_REG_22,
+ TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19, TCG_REG_20, TCG_REG_21
+};
+
+/*
+ * according to alpha calling convention, these 6 registers are used for
+ * function parameter passing. if function has more than 6 parameters, remained
+ * ones are stored on stack.
+*/
+static const int tcg_target_call_iarg_regs[6] = {
+ TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19, TCG_REG_20, TCG_REG_21
+};
+
+/*
+ * according to alpha calling convention, $0 is used for returning function result.
+*/
+static const int tcg_target_call_oarg_regs[1] = { TCG_REG_0 };
+
+/*
+ * save the address of TB's epilogue.
+*/
+static uint8_t *tb_ret_addr;
+
+#define INSN_OP(x) (((x) & 0x3f) << 26)
+#define INSN_FUNC1(x) (((x) & 0x3) << 14)
+#define INSN_FUNC2(x) (((x) & 0x7f) << 5)
+#define INSN_RA(x) (((x) & 0x1f) << 21)
+#define INSN_RB(x) (((x) & 0x1f) << 16)
+#define INSN_RC(x) ((x) & 0x1f)
+#define INSN_LIT(x) (((x) & 0xff) << 13)
+#define INSN_DISP16(x) ((x) & 0xffff)
+#define INSN_DISP21(x) ((x) & 0x1fffff)
+#define INSN_RSVED(x) ((x) & 0x3fff)
+
+#define INSN_JMP (INSN_OP(0x1a) | INSN_FUNC1(0))
+#define INSN_CALL (INSN_OP(0x1a) | INSN_FUNC1(1))
+#define INSN_RET (INSN_OP(0x1a) | INSN_FUNC1(2))
+#define INSN_BR INSN_OP(0x30)
+#define INSN_BEQ INSN_OP(0x39)
+#define INSN_BNE INSN_OP(0x3d)
+#define INSN_BLBC INSN_OP(0x38)
+#define INSN_BLBS INSN_OP(0x3c)
+#define INSN_ADDL (INSN_OP(0x10) | INSN_FUNC2(0))
+#define INSN_SUBL (INSN_OP(0x10) | INSN_FUNC2(0x9))
+#define INSN_ADDQ (INSN_OP(0x10) | INSN_FUNC2(0x20))
+#define INSN_SUBQ (INSN_OP(0x10) | INSN_FUNC2(0x29))
+#define INSN_CMPEQ (INSN_OP(0x10) | INSN_FUNC2(0x2d))
+#define INSN_CMPLT (INSN_OP(0x10) | INSN_FUNC2(0x4d))
+#define INSN_CMPLE (INSN_OP(0x10) | INSN_FUNC2(0x6d))
+#define INSN_CMPULT (INSN_OP(0x10) | INSN_FUNC2(0x1d))
+#define INSN_CMPULE (INSN_OP(0x10) | INSN_FUNC2(0x3d))
+#define INSN_MULL (INSN_OP(0x13) | INSN_FUNC2(0))
+#define INSN_MULQ (INSN_OP(0x13) | INSN_FUNC2(0x20))
+#define INSN_AND (INSN_OP(0x11) | INSN_FUNC2(0))
+#define INSN_BIS (INSN_OP(0x11) | INSN_FUNC2(0x20))
+#define INSN_XOR (INSN_OP(0x11) | INSN_FUNC2(0x40))
+#define INSN_SLL (INSN_OP(0x12) | INSN_FUNC2(0x39))
+#define INSN_SRL (INSN_OP(0x12) | INSN_FUNC2(0x34))
+#define INSN_SRA (INSN_OP(0x12) | INSN_FUNC2(0x3c))
+#define INSN_ZAPNOT (INSN_OP(0x12) | INSN_FUNC2(0x31))
+#define INSN_SEXTB (INSN_OP(0x1c) | INSN_FUNC2(0))
+#define INSN_SEXTW (INSN_OP(0x1c) | INSN_FUNC2(0x1))
+#define INSN_LDA INSN_OP(0x8)
+#define INSN_LDAH INSN_OP(0x9)
+#define INSN_LDBU INSN_OP(0xa)
+#define INSN_LDWU INSN_OP(0xc)
+#define INSN_LDL INSN_OP(0x28)
+#define INSN_LDQ INSN_OP(0x29)
+#define INSN_STB INSN_OP(0xe)
+#define INSN_STW INSN_OP(0xd)
+#define INSN_STL INSN_OP(0x2c)
+#define INSN_STQ INSN_OP(0x2d)
+
+/*
+ * return the # of regs used for parameter passing on procedure calling.
+ * note that alpha use $16~$21 to transfer the first 6 paramenters of a procedure.
+*/
+static inline int tcg_target_get_call_iarg_regs_count(int flags)
+{
+ return 6;
+}
+
+/*
+ * given constraint, return available register set. this function is called once
+ * for each op at qemu's initialization stage.
+*/
+static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
+{
+ const char *ct_str = *pct_str;
+
+ switch(ct_str[0])
+ {
+ case 'r':
+ /* constaint 'r' means any register is okay */
+ ct->ct |= TCG_CT_REG;
+ tcg_regset_set32(ct->u.regs, 0, 0xffffffffu);
+ break;
+
+ case 'L':
+ /*
+ * constranit 'L' is used for qemu_ld/st, which has 2 meanings:
+ * 1st, we the argument need to be allocated a register.
+ * 2nd, we should reserve some registers that belong to caller-clobbered
+ * list for qemu_ld/st local usage, so these registers must not be
+ * allocated to the argument that the 'L' constraint is describing.
+ *
+ * note that op qemu_ld/st has the TCG_OPF_CALL_CLOBBER flag, and
+ * tcg will free all callee-clobbered registers before generate target
+ * insn for qemu_ld/st, so we can use these register directly without
+ * warrying about destroying their content.
+ */
+ ct->ct |= TCG_CT_REG;
+ tcg_regset_set32(ct->u.regs, 0, 0xffffffffu);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_0);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_16);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_17);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_18);
+ break;
+
+ default:
+ return -1;
+ }
+
+ ct_str++;
+ *pct_str = ct_str;
+ return 0;
+}
+
+/*
+ * whether op's input argument may use constant
+*/
+static inline int tcg_target_const_match( \
+ tcg_target_long val, const TCGArgConstraint *arg_ct)
+{
+ int ct = arg_ct->ct;
+ return (ct & TCG_CT_CONST) ? 1 : 0;
+}
+
+static inline void tcg_out_fmt_br(TCGContext *s, int opc, int ra, int disp)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_DISP21(disp));
+}
+
+static inline void tcg_out_fmt_mem(TCGContext *s, int opc, int ra, int rb, int disp)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_RB(rb)|INSN_DISP16(disp));
+}
+
+static inline void tcg_out_fmt_jmp(TCGContext *s, int opc, int ra, int rb, int rsved)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_RB(rb)|INSN_RSVED(rsved));
+}
+
+static inline void tcg_out_fmt_opr(TCGContext *s, int opc, int ra, int rb, int rc)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_RB(rb)|INSN_RC(rc));
+}
+
+static inline void tcg_out_fmt_opi(TCGContext *s, int opc, int ra, int lit, int rc)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_LIT(lit)|INSN_RC(rc)|(1<<12));
+}
+
+/*
+ * mov from a reg to another
+*/
+static inline void tcg_out_mov(TCGContext *s, int rc, int rb)
+{
+ if ( rb != rc ) {
+ tcg_out_fmt_opr(s, INSN_BIS, TCG_REG_31, rb, rc);
+ }
+}
+
+/*
+ * mov a 64-bit immediate 'arg' to regsiter 'ra', this function will
+ * generate fixed length (5 insns) of target insn sequence.
+*/
+static void tcg_out_movi_fixl( \
+ TCGContext *s, TCGType type, int ra, tcg_target_long arg)
+{
+ tcg_target_long l0, l1, l2, l3;
+ tcg_target_long l1_tmp, l2_tmp, l3_tmp;
+
+ l0 = arg & 0xffffu;
+ l1_tmp = l1 = ( arg >> 16) & 0xffffu;
+ l2_tmp = l2 = ( arg >> 32) & 0xffffu;
+ l3_tmp = l3 = ( arg >> 48) & 0xffffu;
+
+ if ( l0 & 0x8000u)
+ l1_tmp = (l1 + 1) & 0xffffu;
+ if ( (l1_tmp & 0x8000u) || ((l1_tmp == 0) && (l1_tmp != l1)))
+ l2_tmp = (l2 + 1) & 0xffffu;
+ if ( (l2_tmp & 0x8000u) || ((l2_tmp == 0) && (l2_tmp != l2)))
+ l3_tmp = (l3 + 1) & 0xffffu;
+
+ tcg_out_fmt_mem(s, INSN_LDAH, ra, TCG_REG_31, l3_tmp);
+ tcg_out_fmt_mem(s, INSN_LDA, ra, ra, l2_tmp);
+ tcg_out_fmt_opi(s, INSN_SLL, ra, 32, ra);
+ tcg_out_fmt_mem(s, INSN_LDAH, ra, ra, l1_tmp);
+ tcg_out_fmt_mem(s, INSN_LDA, ra, ra, l0);
+}
+
+/*
+ * mov 64-bit immediate 'arg' to regsiter 'ra'. this function will
+ * generate variable length of target insn sequence.
+*/
+static inline void tcg_out_movi( \
+ TCGContext *s, TCGType type, int ra, tcg_target_long arg)
+{
+ if ( type == TCG_TYPE_I32)
+ arg = (int32_t)arg;
+
+ if( arg == (int16_t)arg ) {
+ tcg_out_fmt_mem(s, INSN_LDA, ra, TCG_REG_31, arg);
+ } else if( arg == (int32_t)arg ) {
+ tcg_out_fmt_mem(s, INSN_LDAH, ra, TCG_REG_31, (arg>>16));
+ if( arg & ((tcg_target_ulong)0x8000) ) {
+ tcg_out_fmt_mem(s, INSN_LDAH, ra, ra, 1);
+ }
+ tcg_out_fmt_mem(s, INSN_LDA, ra, ra, arg);
+ } else {
+ tcg_out_movi_fixl(s, type, ra, arg);
+ }
+}
+
+static inline int _is_tmp_reg( int r)
+{
+ if ( r == TMP_REG1 || r == TMP_REG2 || r == TMP_REG3)
+ return 1;
+ else
+ return 0;
+}
+
+/*
+ * load value in disp(Rb) to Ra.
+*/
+static inline void tcg_out_ld( \
+ TCGContext *s, TCGType type, int ra, int rb, tcg_target_long disp)
+{
+ int opc;
+
+ if ( _is_tmp_reg(ra) || _is_tmp_reg(rb))
+ tcg_abort();
+
+ opc = ((type == TCG_TYPE_I32) ? INSN_LDL : INSN_LDQ);
+
+ if( disp != (int16_t)disp ) {
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
+ tcg_out_fmt_opr(s, INSN_ADDQ, rb, TMP_REG1, TMP_REG1);
+ tcg_out_fmt_mem(s, opc, ra, TMP_REG1, 0);
+ }
+ else
+ tcg_out_fmt_mem(s, opc, ra, rb, disp);
+}
+
+/*
+ * store value in Ra to disp(Rb).
+*/
+static inline void tcg_out_st( \
+ TCGContext *s, TCGType type, int ra, int rb, tcg_target_long disp)
+{
+ int opc;
+
+ if ( _is_tmp_reg(ra) || _is_tmp_reg(rb))
+ tcg_abort();
+
+ opc = ((type == TCG_TYPE_I32) ? INSN_STL : INSN_STQ);
+
+ if( disp != (int16_t)disp ) {
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
+ tcg_out_fmt_opr(s, INSN_ADDQ, rb, TMP_REG1, TMP_REG1);
+ tcg_out_fmt_mem(s, opc, ra, TMP_REG1, 0);
+ }
+ else
+ tcg_out_fmt_mem(s, opc, ra, rb, disp);
+}
+
+/*
+ * generate arithmatic instruction with immediate. ra is used as both
+ * input and output, and val is used as another input.
+*/
+static inline void tgen_arithi( \
+ TCGContext *s, int opc, int ra, tcg_target_long val)
+{
+ if ( _is_tmp_reg(ra))
+ tcg_abort();
+
+ if (val == (uint8_t)val) {
+ tcg_out_fmt_opi(s, opc, ra, val, ra);
+ } else {
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, val);
+ tcg_out_fmt_opr(s, opc, ra, TMP_REG1, ra);
+ }
+}
+
+static void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
+{
+ if (val != 0)
+ tgen_arithi(s, INSN_ADDQ, reg, val);
+}
+
+static inline void tcg_out_push(TCGContext *s, int reg)
+{
+ tcg_out_fmt_opi(s, INSN_SUBQ, TCG_REG_30, 8, TCG_REG_30);
+ tcg_out_fmt_mem(s, INSN_STQ, reg, TCG_REG_30, 0);
+}
+
+static inline void tcg_out_pop(TCGContext *s, int reg)
+{
+ tcg_out_fmt_mem(s, INSN_LDQ, reg, TCG_REG_30, 0);
+ tcg_out_fmt_opi(s, INSN_ADDQ, TCG_REG_30, 8, TCG_REG_30);
+}
+
+static const uint64_t tcg_cond_to_jcc[10] = {
+ [TCG_COND_EQ] = INSN_CMPEQ,
+ [TCG_COND_NE] = INSN_CMPEQ,
+ [TCG_COND_LT] = INSN_CMPLT,
+ [TCG_COND_GE] = INSN_CMPLT,
+ [TCG_COND_LE] = INSN_CMPLE,
+ [TCG_COND_GT] = INSN_CMPLE,
+ [TCG_COND_LTU] = INSN_CMPULT,
+ [TCG_COND_GEU] = INSN_CMPULT,
+ [TCG_COND_LEU] = INSN_CMPULE,
+ [TCG_COND_GTU] = INSN_CMPULE
+};
+
+static void patch_reloc(uint8_t *code_ptr, \
+ int type, tcg_target_long value, tcg_target_long addend)
+{
+ TCGContext s;
+ tcg_target_long val;
+
+ if ( type != R_ALPHA_BRADDR)
+ tcg_abort();
+
+ s.code_ptr = code_ptr;
+ val = (value - (tcg_target_long)s.code_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+
+ tcg_out_fmt_br(&s, INSN_BR, TCG_REG_31, val);
+}
+
+static void tcg_out_br(TCGContext *s, int label_index)
+{
+ TCGLabel *l = &s->labels[label_index];
+
+ if (l->has_value) {
+ tcg_target_long val;
+ val = ((tcg_target_long)(l->u.value) - (tcg_target_long)s->code_ptr - 4) >> 2;
+ if ( val >= -0x100000 && val < 0x100000) {
+ // if distance can be put into 21-bit field
+ tcg_out_fmt_br(s, INSN_BR, TCG_REG_31, val);
+ } else {
+ tcg_abort();
+ }
+ } else {
+ tcg_out_reloc(s, s->code_ptr, R_ALPHA_BRADDR, label_index, 0);
+ s->code_ptr += 4;
+ }
+}
+
+static void tcg_out_brcond( TCGContext *s, int cond, \
+ TCGArg arg1, TCGArg arg2, int const_arg2, int label_index)
+{
+ int opc;
+ TCGLabel *l = &s->labels[label_index];
+
+ if ( cond < TCG_COND_EQ || cond > TCG_COND_GTU || const_arg2)
+ tcg_abort();
+
+ opc = tcg_cond_to_jcc[cond];
+ tcg_out_fmt_opr(s, opc, arg1, arg2, TMP_REG1);
+
+ if (l->has_value) {
+ tcg_target_long val;
+ val = ((tcg_target_long)l->u.value - (tcg_target_long)s->code_ptr - 4) >> 2;
+ if ( val >= -0x100000 && val < 0x100000) {
+ // if distance can be put into 21-bit field
+ opc = (cond & 1) ? INSN_BLBC : INSN_BLBS;
+ tcg_out_fmt_br(s, opc, TMP_REG1, val);
+ } else {
+ tcg_abort();
+ }
+ } else {
+ opc = (cond & 1) ? INSN_BLBS : INSN_BLBC;
+ tcg_out_fmt_br(s, opc, TMP_REG1, 1);
+ tcg_out_reloc(s, s->code_ptr, R_ALPHA_BRADDR, label_index, 0);
+ s->code_ptr += 4;
+ }
+}
+
+#if defined(CONFIG_SOFTMMU)
+
+#include "../../softmmu_defs.h"
+
+static void *qemu_ld_helpers[4] = {
+ __ldb_mmu,
+ __ldw_mmu,
+ __ldl_mmu,
+ __ldq_mmu,
+};
+
+static void *qemu_st_helpers[4] = {
+ __stb_mmu,
+ __stw_mmu,
+ __stl_mmu,
+ __stq_mmu,
+};
+
+#endif
+
+static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, int opc)
+{
+ int addr_reg, data_reg, r0, r1, mem_index, s_bits;
+ tcg_target_long val;
+
+#if defined(CONFIG_SOFTMMU)
+ uint8_t *label1_ptr, *label2_ptr;
+#endif
+
+ data_reg = *args++;
+ addr_reg = *args++;
+ mem_index = *args;
+ s_bits = opc & 3;
+
+ r0 = TCG_REG_16;
+ r1 = TCG_REG_17;
+
+#if defined(CONFIG_SOFTMMU)
+
+ tcg_out_mov(s, r1, addr_reg);
+ tcg_out_mov(s, r0, addr_reg);
+
+#if TARGET_LONG_BITS == 32
+ /* if VM is of 32-bit arch, clear higher 32-bit of addr */
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, r0, 0x0f, r0);
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, r1, 0x0f, r1);
+#endif
+
+ tgen_arithi(s, INSN_AND, r0, TARGET_PAGE_MASK|((1<<s_bits)-1));
+
+ tgen_arithi(s, INSN_SRL, r1, TARGET_PAGE_BITS-CPU_TLB_ENTRY_BITS);
+ tgen_arithi(s, INSN_AND, r1, (CPU_TLB_SIZE-1)<<CPU_TLB_ENTRY_BITS);
+
+ tcg_out_addi(s, r1, offsetof(CPUState, tlb_table[mem_index][0].addr_read));
+ tcg_out_fmt_opr(s, INSN_ADDQ, r1, TCG_REG_15, r1);
+#if TARGET_LONG_BITS == 32
+ tcg_out_fmt_mem(s, INSN_LDL, TMP_REG1, r1, 0);
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TMP_REG1, 0x0f, TMP_REG1);
+#else
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+#endif
+
+ //
+ // now, r0 contains the page# and TMP_REG1 contains the addr to tlb_entry.addr_read
+ // we below will compare them
+ //
+ tcg_out_fmt_opr(s, INSN_CMPEQ, TMP_REG1, r0, TMP_REG1);
+
+ tcg_out_mov(s, r0, addr_reg);
+#if TARGET_LONG_BITS == 32
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, r0, 0x0f, r0);
+#endif
+
+ //
+ // if equal, we jump to label1. since label1 is not resolved yet,
+ // we just record a relocation.
+ //
+ label1_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ //
+ // here, unequal, TLB-miss.
+ //
+ tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_17, mem_index);
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)qemu_ld_helpers[s_bits]);
+ tcg_out_push(s, addr_reg);
+ //tcg_out_push(s, TCG_REG_26);
+ //tcg_out_push(s, TCG_REG_15);
+ tcg_out_mov(s, TCG_REG_27, TMP_REG1);
+ tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, TMP_REG1, 0);
+ //tcg_out_pop(s, TCG_REG_15);
+ //tcg_out_pop(s, TCG_REG_26);
+ tcg_out_pop(s, addr_reg);
+
+ //
+ // after helper function call, the result of ld is saved in $0
+ //
+ switch(opc) {
+ case 0 | 4:
+ tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, TCG_REG_0, data_reg);
+ break;
+ case 1 | 4:
+ tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, TCG_REG_0, data_reg);
+ break;
+ case 2 | 4:
+ tcg_out_fmt_opr(s, INSN_ADDL, TCG_REG_0, TCG_REG_31, data_reg);
+ break;
+ case 0:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TCG_REG_0, 0x1, data_reg);
+ break;
+ case 1:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TCG_REG_0, 0x3, data_reg);
+ break;
+ case 2:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TCG_REG_0, 0xf, data_reg);
+ break;
+ case 3:
+ tcg_out_mov(s, data_reg, TCG_REG_0);
+ break;
+ default:
+ tcg_abort();
+ break;
+ }
+
+ //
+ // we have done, jmp to label2. label2 is not resolved yet,
+ // we record a relocation.
+ //
+ label2_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ // patch jmp to label1
+ val = (s->code_ptr - label1_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label1_ptr = (uint32_t) \
+ ( INSN_BNE | ( TMP_REG1 << 21 ) | ( val & 0x1fffff));
+
+ //
+ // if we get here, a TLB entry is hit, r0 contains the guest addr and
+ // r1 contains the ptr that point to tlb_entry.addr_read. what we should
+ // do is to load the tlb_entry.addend (64-bit on alpha) and add it to
+ // r0 to get the host VA
+ //
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, \
+ offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_read));
+ tcg_out_fmt_opr(s, INSN_ADDQ, r1, TMP_REG1, r1);
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+ tcg_out_fmt_opr(s, INSN_ADDQ, r0, TMP_REG1, r0);
+
+#else
+ r0 = addr_reg;
+#endif // endif defined(CONFIG_SOFTMMU)
+
+#ifdef TARGET_WORDS_BIGENDIAN
+ tcg_abort();
+#endif
+
+ //
+ // when we get here, r0 contains the host VA that can be used to access guest PA
+ //
+ switch(opc) {
+ case 0:
+ tcg_out_fmt_mem(s, INSN_LDBU, data_reg, r0, 0);
+ break;
+ case 0 | 4:
+ tcg_out_fmt_mem(s, INSN_LDBU, data_reg, r0, 0);
+ tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, data_reg, data_reg);
+ break;
+ case 1:
+ tcg_out_fmt_mem(s, INSN_LDWU, data_reg, r0, 0);
+ break;
+ case 1 | 4:
+ tcg_out_fmt_mem(s, INSN_LDWU, data_reg, r0, 0);
+ tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, data_reg, data_reg);
+ break;
+ case 2:
+ tcg_out_fmt_mem(s, INSN_LDL, data_reg, r0, 0);
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, data_reg, 0xf, data_reg);
+ break;
+ case 2 | 4:
+ tcg_out_fmt_mem(s, INSN_LDL, data_reg, r0, 0);
+ break;
+ case 3:
+ tcg_out_fmt_mem(s, INSN_LDQ, data_reg, r0, 0);
+ break;
+ default:
+ tcg_abort();
+ }
+
+#if defined(CONFIG_SOFTMMU)
+ /* label2: */
+ val = (s->code_ptr - label2_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label2_ptr = (uint32_t)( INSN_BR \
+ | ( TCG_REG_31 << 21 ) | ( val & 0x1fffff) );
+#endif
+}
+
+static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int opc)
+{
+ int addr_reg, data_reg, r0, r1, mem_index, s_bits;
+ tcg_target_long val;
+
+#if defined(CONFIG_SOFTMMU)
+ uint8_t *label1_ptr, *label2_ptr;
+#endif
+
+ data_reg = *args++;
+ addr_reg = *args++;
+ mem_index = *args;
+ s_bits = opc&3;
+
+ r0 = TCG_REG_16;
+ r1 = TCG_REG_17;
+
+#if defined(CONFIG_SOFTMMU)
+
+ tcg_out_mov(s, r1, addr_reg);
+ tcg_out_mov(s, r0, addr_reg);
+
+#if TARGET_LONG_BITS == 32
+ /* if VM is of 32-bit arch, clear higher 32-bit of addr */
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, r0, 0x0f, r0);
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, r1, 0x0f, r1);
+#endif
+
+ tgen_arithi(s, INSN_AND, r0, TARGET_PAGE_MASK | ((1 << s_bits) - 1));
+
+ tgen_arithi(s, INSN_SRL, r1, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
+ tgen_arithi(s, INSN_AND, r1, (CPU_TLB_SIZE-1) << CPU_TLB_ENTRY_BITS);
+
+ tcg_out_addi(s, r1, offsetof(CPUState, tlb_table[mem_index][0].addr_write));
+ tcg_out_fmt_opr(s, INSN_ADDQ, r1, TCG_REG_15, r1);
+
+#if TARGET_LONG_BITS == 32
+ tcg_out_fmt_mem(s, INSN_LDL, TMP_REG1, r1, 0);
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TMP_REG1, 0x0f, TMP_REG1);
+#else
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+#endif
+
+ //
+ // now, r0 contains the page# and TMP_REG1 contains the addr to tlb_entry.addr_read
+ // we below will compare them
+ //
+ tcg_out_fmt_opr(s, INSN_CMPEQ, TMP_REG1, r0, TMP_REG1);
+
+ tcg_out_mov(s, r0, addr_reg);
+#if TARGET_LONG_BITS == 32
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, r0, 0x0f, r0);
+#endif
+
+ //
+ // if equal, we jump to label1. since label1 is not resolved yet,
+ // we just record a relocation.
+ //
+ label1_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ // here, unequal, TLB-miss, ...
+ tcg_out_mov(s, TCG_REG_17, data_reg);
+ tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_18, mem_index);
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)qemu_st_helpers[s_bits]);
+
+ tcg_out_push(s, data_reg);
+ tcg_out_push(s, addr_reg);
+ //tcg_out_push(s, TCG_REG_26);
+ //tcg_out_push(s, TCG_REG_15);
+ tcg_out_mov(s, TCG_REG_27,TMP_REG1);
+ tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, TMP_REG1, 0);
+ //tcg_out_pop(s, TCG_REG_15);
+ //tcg_out_pop(s, TCG_REG_26);
+ tcg_out_pop(s, addr_reg);
+ tcg_out_pop(s, data_reg);
+
+ //
+ // we have done, jmp to label2. label2 is not resolved yet,
+ // we record a relocation.
+ //
+ label2_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ // patch jmp to label1
+ val = (s->code_ptr - label1_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label1_ptr = (uint32_t) \
+ ( INSN_BNE | ( TMP_REG1 << 21 ) | ( val & 0x1fffff));
+
+ //
+ // if we get here, a TLB entry is hit, r0 contains the guest addr and
+ // r1 contains the ptr that point to tlb_entry.addr_read. what we should
+ // do is to load the tlb_entry.addend (64-bit on alpha) and add it to
+ // r0 to get the host VA
+ //
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, \
+ offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_write));
+ tcg_out_fmt_opr(s, INSN_ADDQ, r1, TMP_REG1, r1);
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+ tcg_out_fmt_opr(s, INSN_ADDQ, r0, TMP_REG1, r0);
+
+#else
+ r0 = addr_reg;
+#endif
+
+#ifdef TARGET_WORDS_BIGENDIAN
+ tcg_abort();
+#endif
+
+ //
+ // when we get here, r0 contains the host VA that can be used to access guest PA
+ //
+ switch(opc) {
+ case 0:
+ tcg_out_fmt_mem(s, INSN_STB, data_reg, r0, 0);
+ break;
+ case 1:
+ tcg_out_fmt_mem(s, INSN_STW, data_reg, r0, 0);
+ break;
+ case 2:
+ tcg_out_fmt_mem(s, INSN_STL, data_reg, r0, 0);
+ break;
+ case 3:
+ tcg_out_fmt_mem(s, INSN_STQ, data_reg, r0, 0);
+ break;
+ default:
+ tcg_abort();
+ }
+
+#if defined(CONFIG_SOFTMMU)
+ /* patch jmp to label2: */
+ val = (s->code_ptr - label2_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label2_ptr = (uint32_t)( INSN_BR \
+ | ( TCG_REG_31 << 21 ) | ( val & 0x1fffff));
+#endif
+}
+
+static inline void tgen_ldxx( TCGContext *s, int ra, int rb, tcg_target_long disp, int flags)
+{
+ int opc_array[4] = { INSN_LDBU, INSN_LDWU, INSN_LDL, INSN_LDQ};
+ int opc = opc_array[flags & 3];
+
+ if ( _is_tmp_reg(ra) || _is_tmp_reg(rb))
+ tcg_abort();
+
+ if( disp != (int16_t)disp ) {
+ /* disp cannot be stored in insn directly */
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
+ tcg_out_fmt_opr(s, INSN_ADDQ, rb, TMP_REG1, TMP_REG1);
+ tcg_out_fmt_mem(s, opc, ra, TMP_REG1, 0);
+ } else {
+ tcg_out_fmt_mem(s, opc, ra, rb, disp);
+ }
+
+ switch ( flags & 7) {
+ case 0:
+ case 1:
+ case 2|4:
+ case 3:
+ break;
+ case 0|4:
+ tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, ra, ra);
+ break;
+ case 1|4:
+ tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, ra, ra);
+ break;
+ case 2:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, ra, 0x0f, ra);
+ break;
+ default:
+ tcg_abort();
+ }
+}
+
+static inline void tgen_stxx( TCGContext *s, int ra, int rb, tcg_target_long disp, int flags)
+{
+ int opc_array[4] = { INSN_STB, INSN_STW, INSN_STL, INSN_STQ};
+ int opc = opc_array[flags & 3];
+
+ if( disp != (int16_t)disp ) {
+ /* disp cannot be stored in insn directly */
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
+ tcg_out_fmt_opr(s, INSN_ADDQ, rb, TMP_REG1, TMP_REG1);
+ tcg_out_fmt_mem(s, opc, ra, TMP_REG1, 0);
+ } else {
+ tcg_out_fmt_mem(s, opc, ra, rb, disp);
+ }
+}
+
+static inline void tcg_out_op(TCGContext *s, \
+ int opc, const TCGArg *args, const int *const_args)
+{
+ int oc;
+ switch(opc)
+ {
+ case INDEX_op_exit_tb:
+ /*
+ * exit_tb t0, where t0 is always constant and should be returned to engine
+ * since we'll back to engine soon, $0 and $1 will never be used
+ */
+ tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_0, args[0]);
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)tb_ret_addr);
+ tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, TMP_REG1, 0);
+ break;
+
+ case INDEX_op_goto_tb:
+ /* goto_tb idx, where idx is constant 0 or 1, indicating the branch # */
+ if (s->tb_jmp_offset) {
+ /* we don't support direct jmp */
+ tcg_abort();
+ } else {
+ tcg_out_movi( s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)(s->tb_next + args[0]));
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, TMP_REG1, 0);
+ tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, TMP_REG1, 0);
+ }
+ s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;
+ break;
+
+ case INDEX_op_call:
+ if (const_args[0]) {
+ tcg_abort();
+ } else {
+ //tcg_out_push( s, TCG_REG_26);
+ //tcg_out_push( s, TCG_REG_15);
+ tcg_out_mov( s, TCG_REG_27, args[0]);
+ tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, args[0], 0);
+ //tcg_out_pop( s, TCG_REG_15);
+ //tcg_out_pop( s, TCG_REG_26);
+ }
+ break;
+
+ case INDEX_op_jmp:
+ if (const_args[0]) {
+ tcg_abort();
+ } else {
+ tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, args[0], 0);
+ }
+ break;
+
+ case INDEX_op_br:
+ tcg_out_br(s, args[0]);
+ break;
+
+ case INDEX_op_ld8u_i32:
+ case INDEX_op_ld8u_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 0);
+ break;
+ case INDEX_op_ld8s_i32:
+ case INDEX_op_ld8s_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 0|4);
+ break;
+ case INDEX_op_ld16u_i32:
+ case INDEX_op_ld16u_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 1);
+ break;
+ case INDEX_op_ld16s_i32:
+ case INDEX_op_ld16s_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 1|4);
+ break;
+ case INDEX_op_ld32u_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 2);
+ break;
+ case INDEX_op_ld_i32:
+ case INDEX_op_ld32s_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 2|4);
+ break;
+ case INDEX_op_ld_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 3);
+ break;
+
+ case INDEX_op_st8_i32:
+ case INDEX_op_st8_i64:
+ tgen_stxx( s, args[0], args[1], args[2], 0);
+ break;
+ case INDEX_op_st16_i32:
+ case INDEX_op_st16_i64:
+ tgen_stxx( s, args[0], args[1], args[2], 1);
+ break;
+ case INDEX_op_st_i32:
+ case INDEX_op_st32_i64:
+ tgen_stxx( s, args[0], args[1], args[2], 2);
+ break;
+ case INDEX_op_st_i64:
+ tgen_stxx( s, args[0], args[1], args[2], 3);
+ break;
+
+ case INDEX_op_add_i32:
+ case INDEX_op_add_i64:
+ oc = INSN_ADDQ;
+ goto gen_arith;
+ case INDEX_op_sub_i32:
+ case INDEX_op_sub_i64:
+ oc = INSN_SUBQ;
+ goto gen_arith;
+ case INDEX_op_mul_i32:
+ oc = INSN_MULL;
+ goto gen_arith;
+ case INDEX_op_mul_i64:
+ oc = INSN_MULQ;
+ goto gen_arith;
+ case INDEX_op_and_i32:
+ case INDEX_op_and_i64:
+ oc = INSN_AND;
+ goto gen_arith;
+ case INDEX_op_or_i32:
+ case INDEX_op_or_i64:
+ oc = INSN_BIS;
+ goto gen_arith;
+ case INDEX_op_xor_i32:
+ case INDEX_op_xor_i64:
+ oc = INSN_XOR;
+ goto gen_arith;
+ case INDEX_op_shl_i32:
+ case INDEX_op_shl_i64:
+ oc = INSN_SLL;
+ goto gen_arith;
+ case INDEX_op_shr_i32:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, args[1], 0x0f, args[1]);
+ case INDEX_op_shr_i64:
+ oc = INSN_SRL;
+ goto gen_arith;
+ case INDEX_op_sar_i32:
+ tcg_out_fmt_opr(s, INSN_ADDL, args[1], TCG_REG_31, args[1]);
+ case INDEX_op_sar_i64:
+ oc = INSN_SRA;
+ gen_arith:
+ if (const_args[2]) {
+ tcg_abort();
+ } else {
+ tcg_out_fmt_opr(s, oc, args[1], args[2], args[0]);
+ }
+ break;
+
+ case INDEX_op_brcond_i32:
+ tcg_out_fmt_opr(s, INSN_ADDL, args[0], TCG_REG_31, args[0]);
+ tcg_out_fmt_opr(s, INSN_ADDL, args[1], TCG_REG_31, args[1]);
+ tcg_out_brcond(s, args[2], args[0], args[1], const_args[1], args[3]);
+ break;
+ case INDEX_op_brcond_i64:
+ tcg_out_brcond(s, args[2], args[0], args[1], const_args[1], args[3]);
+ break;
+
+ case INDEX_op_ext8s_i32:
+ case INDEX_op_ext8s_i64:
+ tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, args[1], args[0]);
+ break;
+ case INDEX_op_ext16s_i32:
+ case INDEX_op_ext16s_i64:
+ tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, args[1], args[0]);
+ break;
+ case INDEX_op_ext32s_i64:
+ tcg_out_fmt_opr(s, INSN_ADDL, args[1], TCG_REG_31, args[0]);
+ break;
+
+ case INDEX_op_qemu_ld8u:
+ tcg_out_qemu_ld(s, args, 0);
+ break;
+ case INDEX_op_qemu_ld8s:
+ tcg_out_qemu_ld(s, args, 0 | 4);
+ break;
+ case INDEX_op_qemu_ld16u:
+ tcg_out_qemu_ld(s, args, 1);
+ break;
+ case INDEX_op_qemu_ld16s:
+ tcg_out_qemu_ld(s, args, 1 | 4);
+ break;
+ case INDEX_op_qemu_ld32u:
+ tcg_out_qemu_ld(s, args, 2);
+ break;
+ case INDEX_op_qemu_ld32s:
+ tcg_out_qemu_ld(s, args, 2 | 4);
+ break;
+ case INDEX_op_qemu_ld64:
+ tcg_out_qemu_ld(s, args, 3);
+ break;
+
+ case INDEX_op_qemu_st8:
+ tcg_out_qemu_st(s, args, 0);
+ break;
+ case INDEX_op_qemu_st16:
+ tcg_out_qemu_st(s, args, 1);
+ break;
+ case INDEX_op_qemu_st32:
+ tcg_out_qemu_st(s, args, 2);
+ break;
+ case INDEX_op_qemu_st64:
+ tcg_out_qemu_st(s, args, 3);
+ break;
+
+ case INDEX_op_movi_i32:
+ case INDEX_op_movi_i64:
+ case INDEX_op_mov_i32:
+ case INDEX_op_mov_i64:
+ case INDEX_op_div2_i32:
+ case INDEX_op_divu2_i32:
+ default:
+ tcg_abort();
+ }
+}
+
+static const TCGTargetOpDef alpha_op_defs[] = {
+ { INDEX_op_exit_tb, { } },
+ { INDEX_op_goto_tb, { } },
+ { INDEX_op_call, { "r" } },
+ { INDEX_op_jmp, { "r" } },
+ { INDEX_op_br, { } },
+
+ { INDEX_op_mov_i32, { "r", "r" } },
+ { INDEX_op_movi_i32, { "r" } },
+ { INDEX_op_ld8u_i32, { "r", "r" } },
+ { INDEX_op_ld8s_i32, { "r", "r" } },
+ { INDEX_op_ld16u_i32, { "r", "r" } },
+ { INDEX_op_ld16s_i32, { "r", "r" } },
+ { INDEX_op_ld_i32, { "r", "r" } },
+ { INDEX_op_st8_i32, { "r", "r" } },
+ { INDEX_op_st16_i32, { "r", "r" } },
+ { INDEX_op_st_i32, { "r", "r" } },
+
+ { INDEX_op_add_i32, { "r", "0", "r" } },
+ { INDEX_op_mul_i32, { "r", "0", "r" } },
+ //{ INDEX_op_div2_i32, { "a", "d", "0", "1", "r" } },
+ //{ INDEX_op_divu2_i32, { "a", "d", "0", "1", "r" } },
+ { INDEX_op_sub_i32, { "r", "0", "r" } },
+ { INDEX_op_and_i32, { "r", "0", "r" } },
+ { INDEX_op_or_i32, { "r", "0", "r" } },
+ { INDEX_op_xor_i32, { "r", "0", "r" } },
+
+ { INDEX_op_shl_i32, { "r", "0", "r" } },
+ { INDEX_op_shr_i32, { "r", "0", "r" } },
+ { INDEX_op_sar_i32, { "r", "0", "r" } },
+
+ { INDEX_op_brcond_i32, { "r", "r" } },
+
+ { INDEX_op_mov_i64, { "r", "r" } },
+ { INDEX_op_movi_i64, { "r" } },
+ { INDEX_op_ld8u_i64, { "r", "r" } },
+ { INDEX_op_ld8s_i64, { "r", "r" } },
+ { INDEX_op_ld16u_i64, { "r", "r" } },
+ { INDEX_op_ld16s_i64, { "r", "r" } },
+ { INDEX_op_ld32u_i64, { "r", "r" } },
+ { INDEX_op_ld32s_i64, { "r", "r" } },
+ { INDEX_op_ld_i64, { "r", "r" } },
+ { INDEX_op_st8_i64, { "r", "r" } },
+ { INDEX_op_st16_i64, { "r", "r" } },
+ { INDEX_op_st32_i64, { "r", "r" } },
+ { INDEX_op_st_i64, { "r", "r" } },
+
+ { INDEX_op_add_i64, { "r", "0", "r" } },
+ { INDEX_op_mul_i64, { "r", "0", "r" } },
+ //{ INDEX_op_div2_i64, { "a", "d", "0", "1", "r" } },
+ //{ INDEX_op_divu2_i64, { "a", "d", "0", "1", "r" } },
+ { INDEX_op_sub_i64, { "r", "0", "r" } },
+ { INDEX_op_and_i64, { "r", "0", "r" } },
+ { INDEX_op_or_i64, { "r", "0", "r" } },
+ { INDEX_op_xor_i64, { "r", "0", "r" } },
+
+ { INDEX_op_shl_i64, { "r", "0", "r" } },
+ { INDEX_op_shr_i64, { "r", "0", "r" } },
+ { INDEX_op_sar_i64, { "r", "0", "r" } },
+
+ { INDEX_op_brcond_i64, { "r", "r" } },
+
+ { INDEX_op_ext8s_i32, { "r", "r"} },
+ { INDEX_op_ext16s_i32, { "r", "r"} },
+ { INDEX_op_ext8s_i64, { "r", "r"} },
+ { INDEX_op_ext16s_i64, { "r", "r"} },
+ { INDEX_op_ext32s_i64, { "r", "r"} },
+
+ { INDEX_op_qemu_ld8u, { "r", "L" } },
+ { INDEX_op_qemu_ld8s, { "r", "L" } },
+ { INDEX_op_qemu_ld16u, { "r", "L" } },
+ { INDEX_op_qemu_ld16s, { "r", "L" } },
+ { INDEX_op_qemu_ld32u, { "r", "L" } },
+ { INDEX_op_qemu_ld32s, { "r", "L" } },
+ { INDEX_op_qemu_ld64, { "r", "L" } },
+
+ { INDEX_op_qemu_st8, { "L", "L" } },
+ { INDEX_op_qemu_st16, { "L", "L" } },
+ { INDEX_op_qemu_st32, { "L", "L" } },
+ //{ INDEX_op_qemu_st64, { "L", "L", "L"} },
+ { INDEX_op_qemu_st64, { "L", "L"} },
+ { -1 },
+};
+
+
+static int tcg_target_callee_save_regs[] = {
+ TCG_REG_15, // used for the global env, so no need to save
+ TCG_REG_9,
+ TCG_REG_10,
+ TCG_REG_11,
+ TCG_REG_12,
+ TCG_REG_13,
+ TCG_REG_14
+};
+
+/*
+ * Generate global QEMU prologue and epilogue code
+*/
+void tcg_target_qemu_prologue(TCGContext *s)
+{
+ int i, frame_size, push_size, stack_addend;
+
+ /* TB prologue */
+ /*printf("TB prologue @ %lx\n", s->code_ptr);*/
+
+ /* save TCG_REG_26 */
+ tcg_out_push(s, TCG_REG_26);
+ tcg_out_push(s, TCG_REG_27);
+ tcg_out_push(s, TCG_REG_28);
+ tcg_out_push(s, TCG_REG_29);
+
+ /* save all callee saved registers */
+ for(i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
+ tcg_out_push(s, tcg_target_callee_save_regs[i]);
+ }
+
+ /* reserve some stack space */
+ push_size = 8 + (4 + ARRAY_SIZE(tcg_target_callee_save_regs)) * 8;
+ frame_size = push_size + 4*TCG_STATIC_CALL_ARGS_SIZE;
+ frame_size = (frame_size + TCG_TARGET_STACK_ALIGN - 1) & ~(TCG_TARGET_STACK_ALIGN - 1);
+ stack_addend = frame_size - push_size;
+ tcg_out_addi(s, TCG_REG_30, -stack_addend);
+
+ tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, TCG_REG_16, 0); /* jmp $16 */
+
+ /* TB epilogue */
+ tb_ret_addr = s->code_ptr;
+ tcg_out_addi(s, TCG_REG_30, stack_addend);
+ for(i = ARRAY_SIZE(tcg_target_callee_save_regs) - 1; i >= 0; i--) {
+ tcg_out_pop(s, tcg_target_callee_save_regs[i]);
+ }
+
+ tcg_out_pop(s, TCG_REG_29);
+ tcg_out_pop(s, TCG_REG_28);
+ tcg_out_pop(s, TCG_REG_27);
+ tcg_out_pop(s, TCG_REG_26);
+ tcg_out_fmt_jmp(s, INSN_RET, TCG_REG_31, TCG_REG_26, 0); /* ret */
+}
+
+
+void tcg_target_init(TCGContext *s)
+{
+ /* fail safe */
+ if ((1 << CPU_TLB_ENTRY_BITS) != sizeof(CPUTLBEntry))
+ tcg_abort();
+
+ tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffffffff);
+ tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffffffff);
+ tcg_regset_set32(tcg_target_call_clobber_regs, 0,
+ (1 << TCG_REG_1 ) | (1 << TCG_REG_2 ) | (1 << TCG_REG_3 ) | (1 << TCG_REG_4 ) |
+ (1 << TCG_REG_5 ) | (1 << TCG_REG_6 ) | (1 << TCG_REG_7 ) | (1 << TCG_REG_8 ) |
+ (1 << TCG_REG_22) | (1 << TCG_REG_23) | (1 << TCG_REG_24) | (1 << TCG_REG_25) |
+ (1 << TCG_REG_16) | (1 << TCG_REG_17) | (1 << TCG_REG_18) | (1 << TCG_REG_19) |
+ (1 << TCG_REG_20) | (1 << TCG_REG_21) | (1 << TCG_REG_0 ));
+
+ //tcg_regset_set32( tcg_target_call_clobber_regs, 0, 0xffffffff);
+
+ tcg_regset_clear(s->reserved_regs);
+ // $26~$31 not allocated by tcg.c
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_26);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_27);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_28);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_29);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_30);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_31);
+ // resved registers for tmp usage
+ tcg_regset_set_reg(s->reserved_regs, TMP_REG1);
+ tcg_regset_set_reg(s->reserved_regs, TMP_REG2);
+ tcg_regset_set_reg(s->reserved_regs, TMP_REG3);
+
+ tcg_add_target_add_op_defs(alpha_op_defs);
+}
+
diff --git a/tcg/alpha/tcg-target.h b/tcg/alpha/tcg-target.h
new file mode 100644
index 0000000..79c57af
--- /dev/null
+++ b/tcg/alpha/tcg-target.h
@@ -0,0 +1,70 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#define TCG_TARGET_ALPHA 1
+
+#define TCG_TARGET_REG_BITS 64
+
+#define TCG_TARGET_NB_REGS 32
+
+enum {
+ TCG_REG_0 = 0, TCG_REG_1, TCG_REG_2, TCG_REG_3,
+ TCG_REG_4, TCG_REG_5, TCG_REG_6, TCG_REG_7,
+ TCG_REG_8, TCG_REG_9, TCG_REG_10, TCG_REG_11,
+ TCG_REG_12, TCG_REG_13, TCG_REG_14, TCG_REG_15,
+ TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19,
+ TCG_REG_20, TCG_REG_21, TCG_REG_22, TCG_REG_23,
+ TCG_REG_24, TCG_REG_25, TCG_REG_26, TCG_REG_27,
+ TCG_REG_28, TCG_REG_29, TCG_REG_30, TCG_REG_31
+};
+
+/* used for function call generation */
+#define TCG_REG_CALL_STACK TCG_REG_30
+#define TCG_TARGET_STACK_ALIGN 16
+#define TCG_TARGET_CALL_STACK_OFFSET 0
+
+/* we have signed extension instructions */
+#define TCG_TARGET_HAS_ext8s_i32
+#define TCG_TARGET_HAS_ext16s_i32
+#define TCG_TARGET_HAS_ext8s_i64
+#define TCG_TARGET_HAS_ext16s_i64
+#define TCG_TARGET_HAS_ext32s_i64
+
+/* Note: must be synced with dyngen-exec.h */
+#define TCG_AREG0 TCG_REG_15
+#define TCG_AREG1 TCG_REG_9
+#define TCG_AREG2 TCG_REG_10
+#define TCG_AREG3 TCG_REG_11
+#define TCG_AREG4 TCG_REG_12
+#define TCG_AREG5 TCG_REG_13
+#define TCG_AREG6 TCG_REG_14
+
+#define TMP_REG1 TCG_REG_23
+#define TMP_REG2 TCG_REG_24
+#define TMP_REG3 TCG_REG_25
+
+static inline void flush_icache_range(unsigned long start, unsigned long stop)
+{
+ __asm__ __volatile__ ("call_pal 0x86");
+}
+
--
1.6.3.3
Dong Weiyu.
___________________________________________________________
好玩贺卡等你发，邮箱贺卡全新上线！
http://card.mail.cn.yahoo.com/
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: 0001-Porting-TCG-to-alpha-platform.patch --]
[-- Type: text/x-patch; name="0001-Porting-TCG-to-alpha-platform.patch", Size: 42321 bytes --]
From 7cc2acddfb7333ab3f1f6b17fa8fa5dcdd3c0095 Mon Sep 17 00:00:00 2001
From: Dong Weiyu <cidentifier@yahoo.com.cn>
Date: Wed, 20 Jan 2010 23:48:55 +0800
Subject: [PATCH] Porting TCG to alpha platform.
---
cpu-all.h | 2 +-
tcg/alpha/tcg-target.c | 1196 ++++++++++++++++++++++++++++++++++++++++++++++++
tcg/alpha/tcg-target.h | 70 +++
3 files changed, 1267 insertions(+), 1 deletions(-)
create mode 100644 tcg/alpha/tcg-target.c
create mode 100644 tcg/alpha/tcg-target.h
diff --git a/cpu-all.h b/cpu-all.h
index e0c3efd..bdf6fb2 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -22,7 +22,7 @@
#include "qemu-common.h"
-#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__)
+#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__) || defined(__alpha__)
#define WORDS_ALIGNED
#endif
diff --git a/tcg/alpha/tcg-target.c b/tcg/alpha/tcg-target.c
new file mode 100644
index 0000000..143f576
--- /dev/null
+++ b/tcg/alpha/tcg-target.c
@@ -0,0 +1,1196 @@
+/*
+ * Tiny Code Generator for QEMU on ALPHA platform
+*/
+
+#ifndef NDEBUG
+static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
+ "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
+ "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
+ "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
+ "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31",
+};
+#endif
+
+/*
+ * $26 ~ $31 are special, reserved,
+ * and $25 is deliberately reserved for jcc operation
+ * and $0 is usually used for return function result, better allocate it later
+ * and $15 is used for cpu_env pointer, allocate it at last
+*/
+static const int tcg_target_reg_alloc_order[] = {
+ TCG_REG_9, TCG_REG_10, TCG_REG_11, TCG_REG_12, TCG_REG_13, TCG_REG_14,
+ TCG_REG_1, TCG_REG_2, TCG_REG_3, TCG_REG_4, TCG_REG_5, TCG_REG_6,
+ TCG_REG_7, TCG_REG_8, TCG_REG_22,
+ TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19, TCG_REG_20, TCG_REG_21
+};
+
+/*
+ * according to alpha calling convention, these 6 registers are used for
+ * function parameter passing. if function has more than 6 parameters, remained
+ * ones are stored on stack.
+*/
+static const int tcg_target_call_iarg_regs[6] = {
+ TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19, TCG_REG_20, TCG_REG_21
+};
+
+/*
+ * according to alpha calling convention, $0 is used for returning function result.
+*/
+static const int tcg_target_call_oarg_regs[1] = { TCG_REG_0 };
+
+/*
+ * save the address of TB's epilogue.
+*/
+static uint8_t *tb_ret_addr;
+
+#define INSN_OP(x) (((x) & 0x3f) << 26)
+#define INSN_FUNC1(x) (((x) & 0x3) << 14)
+#define INSN_FUNC2(x) (((x) & 0x7f) << 5)
+#define INSN_RA(x) (((x) & 0x1f) << 21)
+#define INSN_RB(x) (((x) & 0x1f) << 16)
+#define INSN_RC(x) ((x) & 0x1f)
+#define INSN_LIT(x) (((x) & 0xff) << 13)
+#define INSN_DISP16(x) ((x) & 0xffff)
+#define INSN_DISP21(x) ((x) & 0x1fffff)
+#define INSN_RSVED(x) ((x) & 0x3fff)
+
+#define INSN_JMP (INSN_OP(0x1a) | INSN_FUNC1(0))
+#define INSN_CALL (INSN_OP(0x1a) | INSN_FUNC1(1))
+#define INSN_RET (INSN_OP(0x1a) | INSN_FUNC1(2))
+#define INSN_BR INSN_OP(0x30)
+#define INSN_BEQ INSN_OP(0x39)
+#define INSN_BNE INSN_OP(0x3d)
+#define INSN_BLBC INSN_OP(0x38)
+#define INSN_BLBS INSN_OP(0x3c)
+#define INSN_ADDL (INSN_OP(0x10) | INSN_FUNC2(0))
+#define INSN_SUBL (INSN_OP(0x10) | INSN_FUNC2(0x9))
+#define INSN_ADDQ (INSN_OP(0x10) | INSN_FUNC2(0x20))
+#define INSN_SUBQ (INSN_OP(0x10) | INSN_FUNC2(0x29))
+#define INSN_CMPEQ (INSN_OP(0x10) | INSN_FUNC2(0x2d))
+#define INSN_CMPLT (INSN_OP(0x10) | INSN_FUNC2(0x4d))
+#define INSN_CMPLE (INSN_OP(0x10) | INSN_FUNC2(0x6d))
+#define INSN_CMPULT (INSN_OP(0x10) | INSN_FUNC2(0x1d))
+#define INSN_CMPULE (INSN_OP(0x10) | INSN_FUNC2(0x3d))
+#define INSN_MULL (INSN_OP(0x13) | INSN_FUNC2(0))
+#define INSN_MULQ (INSN_OP(0x13) | INSN_FUNC2(0x20))
+#define INSN_AND (INSN_OP(0x11) | INSN_FUNC2(0))
+#define INSN_BIS (INSN_OP(0x11) | INSN_FUNC2(0x20))
+#define INSN_XOR (INSN_OP(0x11) | INSN_FUNC2(0x40))
+#define INSN_SLL (INSN_OP(0x12) | INSN_FUNC2(0x39))
+#define INSN_SRL (INSN_OP(0x12) | INSN_FUNC2(0x34))
+#define INSN_SRA (INSN_OP(0x12) | INSN_FUNC2(0x3c))
+#define INSN_ZAPNOT (INSN_OP(0x12) | INSN_FUNC2(0x31))
+#define INSN_SEXTB (INSN_OP(0x1c) | INSN_FUNC2(0))
+#define INSN_SEXTW (INSN_OP(0x1c) | INSN_FUNC2(0x1))
+#define INSN_LDA INSN_OP(0x8)
+#define INSN_LDAH INSN_OP(0x9)
+#define INSN_LDBU INSN_OP(0xa)
+#define INSN_LDWU INSN_OP(0xc)
+#define INSN_LDL INSN_OP(0x28)
+#define INSN_LDQ INSN_OP(0x29)
+#define INSN_STB INSN_OP(0xe)
+#define INSN_STW INSN_OP(0xd)
+#define INSN_STL INSN_OP(0x2c)
+#define INSN_STQ INSN_OP(0x2d)
+
+/*
+ * return the # of regs used for parameter passing on procedure calling.
+ * note that alpha use $16~$21 to transfer the first 6 paramenters of a procedure.
+*/
+static inline int tcg_target_get_call_iarg_regs_count(int flags)
+{
+ return 6;
+}
+
+/*
+ * given constraint, return available register set. this function is called once
+ * for each op at qemu's initialization stage.
+*/
+static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
+{
+ const char *ct_str = *pct_str;
+
+ switch(ct_str[0])
+ {
+ case 'r':
+ /* constaint 'r' means any register is okay */
+ ct->ct |= TCG_CT_REG;
+ tcg_regset_set32(ct->u.regs, 0, 0xffffffffu);
+ break;
+
+ case 'L':
+ /*
+ * constranit 'L' is used for qemu_ld/st, which has 2 meanings:
+ * 1st, we the argument need to be allocated a register.
+ * 2nd, we should reserve some registers that belong to caller-clobbered
+ * list for qemu_ld/st local usage, so these registers must not be
+ * allocated to the argument that the 'L' constraint is describing.
+ *
+ * note that op qemu_ld/st has the TCG_OPF_CALL_CLOBBER flag, and
+ * tcg will free all callee-clobbered registers before generate target
+ * insn for qemu_ld/st, so we can use these register directly without
+ * warrying about destroying their content.
+ */
+ ct->ct |= TCG_CT_REG;
+ tcg_regset_set32(ct->u.regs, 0, 0xffffffffu);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_0);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_16);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_17);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_18);
+ break;
+
+ default:
+ return -1;
+ }
+
+ ct_str++;
+ *pct_str = ct_str;
+ return 0;
+}
+
+/*
+ * whether op's input argument may use constant
+*/
+static inline int tcg_target_const_match( \
+ tcg_target_long val, const TCGArgConstraint *arg_ct)
+{
+ int ct = arg_ct->ct;
+ return (ct & TCG_CT_CONST) ? 1 : 0;
+}
+
+static inline void tcg_out_fmt_br(TCGContext *s, int opc, int ra, int disp)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_DISP21(disp));
+}
+
+static inline void tcg_out_fmt_mem(TCGContext *s, int opc, int ra, int rb, int disp)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_RB(rb)|INSN_DISP16(disp));
+}
+
+static inline void tcg_out_fmt_jmp(TCGContext *s, int opc, int ra, int rb, int rsved)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_RB(rb)|INSN_RSVED(rsved));
+}
+
+static inline void tcg_out_fmt_opr(TCGContext *s, int opc, int ra, int rb, int rc)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_RB(rb)|INSN_RC(rc));
+}
+
+static inline void tcg_out_fmt_opi(TCGContext *s, int opc, int ra, int lit, int rc)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_LIT(lit)|INSN_RC(rc)|(1<<12));
+}
+
+/*
+ * mov from a reg to another
+*/
+static inline void tcg_out_mov(TCGContext *s, int rc, int rb)
+{
+ if ( rb != rc ) {
+ tcg_out_fmt_opr(s, INSN_BIS, TCG_REG_31, rb, rc);
+ }
+}
+
+/*
+ * mov a 64-bit immediate 'arg' to regsiter 'ra', this function will
+ * generate fixed length (5 insns) of target insn sequence.
+*/
+static void tcg_out_movi_fixl( \
+ TCGContext *s, TCGType type, int ra, tcg_target_long arg)
+{
+ tcg_target_long l0, l1, l2, l3;
+ tcg_target_long l1_tmp, l2_tmp, l3_tmp;
+
+ l0 = arg & 0xffffu;
+ l1_tmp = l1 = ( arg >> 16) & 0xffffu;
+ l2_tmp = l2 = ( arg >> 32) & 0xffffu;
+ l3_tmp = l3 = ( arg >> 48) & 0xffffu;
+
+ if ( l0 & 0x8000u)
+ l1_tmp = (l1 + 1) & 0xffffu;
+ if ( (l1_tmp & 0x8000u) || ((l1_tmp == 0) && (l1_tmp != l1)))
+ l2_tmp = (l2 + 1) & 0xffffu;
+ if ( (l2_tmp & 0x8000u) || ((l2_tmp == 0) && (l2_tmp != l2)))
+ l3_tmp = (l3 + 1) & 0xffffu;
+
+ tcg_out_fmt_mem(s, INSN_LDAH, ra, TCG_REG_31, l3_tmp);
+ tcg_out_fmt_mem(s, INSN_LDA, ra, ra, l2_tmp);
+ tcg_out_fmt_opi(s, INSN_SLL, ra, 32, ra);
+ tcg_out_fmt_mem(s, INSN_LDAH, ra, ra, l1_tmp);
+ tcg_out_fmt_mem(s, INSN_LDA, ra, ra, l0);
+}
+
+/*
+ * mov 64-bit immediate 'arg' to regsiter 'ra'. this function will
+ * generate variable length of target insn sequence.
+*/
+static inline void tcg_out_movi( \
+ TCGContext *s, TCGType type, int ra, tcg_target_long arg)
+{
+ if ( type == TCG_TYPE_I32)
+ arg = (int32_t)arg;
+
+ if( arg == (int16_t)arg ) {
+ tcg_out_fmt_mem(s, INSN_LDA, ra, TCG_REG_31, arg);
+ } else if( arg == (int32_t)arg ) {
+ tcg_out_fmt_mem(s, INSN_LDAH, ra, TCG_REG_31, (arg>>16));
+ if( arg & ((tcg_target_ulong)0x8000) ) {
+ tcg_out_fmt_mem(s, INSN_LDAH, ra, ra, 1);
+ }
+ tcg_out_fmt_mem(s, INSN_LDA, ra, ra, arg);
+ } else {
+ tcg_out_movi_fixl(s, type, ra, arg);
+ }
+}
+
+static inline int _is_tmp_reg( int r)
+{
+ if ( r == TMP_REG1 || r == TMP_REG2 || r == TMP_REG3)
+ return 1;
+ else
+ return 0;
+}
+
+/*
+ * load value in disp(Rb) to Ra.
+*/
+static inline void tcg_out_ld( \
+ TCGContext *s, TCGType type, int ra, int rb, tcg_target_long disp)
+{
+ int opc;
+
+ if ( _is_tmp_reg(ra) || _is_tmp_reg(rb))
+ tcg_abort();
+
+ opc = ((type == TCG_TYPE_I32) ? INSN_LDL : INSN_LDQ);
+
+ if( disp != (int16_t)disp ) {
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
+ tcg_out_fmt_opr(s, INSN_ADDQ, rb, TMP_REG1, TMP_REG1);
+ tcg_out_fmt_mem(s, opc, ra, TMP_REG1, 0);
+ }
+ else
+ tcg_out_fmt_mem(s, opc, ra, rb, disp);
+}
+
+/*
+ * store value in Ra to disp(Rb).
+*/
+static inline void tcg_out_st( \
+ TCGContext *s, TCGType type, int ra, int rb, tcg_target_long disp)
+{
+ int opc;
+
+ if ( _is_tmp_reg(ra) || _is_tmp_reg(rb))
+ tcg_abort();
+
+ opc = ((type == TCG_TYPE_I32) ? INSN_STL : INSN_STQ);
+
+ if( disp != (int16_t)disp ) {
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
+ tcg_out_fmt_opr(s, INSN_ADDQ, rb, TMP_REG1, TMP_REG1);
+ tcg_out_fmt_mem(s, opc, ra, TMP_REG1, 0);
+ }
+ else
+ tcg_out_fmt_mem(s, opc, ra, rb, disp);
+}
+
+/*
+ * generate arithmatic instruction with immediate. ra is used as both
+ * input and output, and val is used as another input.
+*/
+static inline void tgen_arithi( \
+ TCGContext *s, int opc, int ra, tcg_target_long val)
+{
+ if ( _is_tmp_reg(ra))
+ tcg_abort();
+
+ if (val == (uint8_t)val) {
+ tcg_out_fmt_opi(s, opc, ra, val, ra);
+ } else {
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, val);
+ tcg_out_fmt_opr(s, opc, ra, TMP_REG1, ra);
+ }
+}
+
+static void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
+{
+ if (val != 0)
+ tgen_arithi(s, INSN_ADDQ, reg, val);
+}
+
+static inline void tcg_out_push(TCGContext *s, int reg)
+{
+ tcg_out_fmt_opi(s, INSN_SUBQ, TCG_REG_30, 8, TCG_REG_30);
+ tcg_out_fmt_mem(s, INSN_STQ, reg, TCG_REG_30, 0);
+}
+
+static inline void tcg_out_pop(TCGContext *s, int reg)
+{
+ tcg_out_fmt_mem(s, INSN_LDQ, reg, TCG_REG_30, 0);
+ tcg_out_fmt_opi(s, INSN_ADDQ, TCG_REG_30, 8, TCG_REG_30);
+}
+
+static const uint64_t tcg_cond_to_jcc[10] = {
+ [TCG_COND_EQ] = INSN_CMPEQ,
+ [TCG_COND_NE] = INSN_CMPEQ,
+ [TCG_COND_LT] = INSN_CMPLT,
+ [TCG_COND_GE] = INSN_CMPLT,
+ [TCG_COND_LE] = INSN_CMPLE,
+ [TCG_COND_GT] = INSN_CMPLE,
+ [TCG_COND_LTU] = INSN_CMPULT,
+ [TCG_COND_GEU] = INSN_CMPULT,
+ [TCG_COND_LEU] = INSN_CMPULE,
+ [TCG_COND_GTU] = INSN_CMPULE
+};
+
+static void patch_reloc(uint8_t *code_ptr, \
+ int type, tcg_target_long value, tcg_target_long addend)
+{
+ TCGContext s;
+ tcg_target_long val;
+
+ if ( type != R_ALPHA_BRADDR)
+ tcg_abort();
+
+ s.code_ptr = code_ptr;
+ val = (value - (tcg_target_long)s.code_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+
+ tcg_out_fmt_br(&s, INSN_BR, TCG_REG_31, val);
+}
+
+static void tcg_out_br(TCGContext *s, int label_index)
+{
+ TCGLabel *l = &s->labels[label_index];
+
+ if (l->has_value) {
+ tcg_target_long val;
+ val = ((tcg_target_long)(l->u.value) - (tcg_target_long)s->code_ptr - 4) >> 2;
+ if ( val >= -0x100000 && val < 0x100000) {
+ // if distance can be put into 21-bit field
+ tcg_out_fmt_br(s, INSN_BR, TCG_REG_31, val);
+ } else {
+ tcg_abort();
+ }
+ } else {
+ tcg_out_reloc(s, s->code_ptr, R_ALPHA_BRADDR, label_index, 0);
+ s->code_ptr += 4;
+ }
+}
+
+static void tcg_out_brcond( TCGContext *s, int cond, \
+ TCGArg arg1, TCGArg arg2, int const_arg2, int label_index)
+{
+ int opc;
+ TCGLabel *l = &s->labels[label_index];
+
+ if ( cond < TCG_COND_EQ || cond > TCG_COND_GTU || const_arg2)
+ tcg_abort();
+
+ opc = tcg_cond_to_jcc[cond];
+ tcg_out_fmt_opr(s, opc, arg1, arg2, TMP_REG1);
+
+ if (l->has_value) {
+ tcg_target_long val;
+ val = ((tcg_target_long)l->u.value - (tcg_target_long)s->code_ptr - 4) >> 2;
+ if ( val >= -0x100000 && val < 0x100000) {
+ // if distance can be put into 21-bit field
+ opc = (cond & 1) ? INSN_BLBC : INSN_BLBS;
+ tcg_out_fmt_br(s, opc, TMP_REG1, val);
+ } else {
+ tcg_abort();
+ }
+ } else {
+ opc = (cond & 1) ? INSN_BLBS : INSN_BLBC;
+ tcg_out_fmt_br(s, opc, TMP_REG1, 1);
+ tcg_out_reloc(s, s->code_ptr, R_ALPHA_BRADDR, label_index, 0);
+ s->code_ptr += 4;
+ }
+}
+
+#if defined(CONFIG_SOFTMMU)
+
+#include "../../softmmu_defs.h"
+
+static void *qemu_ld_helpers[4] = {
+ __ldb_mmu,
+ __ldw_mmu,
+ __ldl_mmu,
+ __ldq_mmu,
+};
+
+static void *qemu_st_helpers[4] = {
+ __stb_mmu,
+ __stw_mmu,
+ __stl_mmu,
+ __stq_mmu,
+};
+
+#endif
+
+static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, int opc)
+{
+ int addr_reg, data_reg, r0, r1, mem_index, s_bits;
+ tcg_target_long val;
+
+#if defined(CONFIG_SOFTMMU)
+ uint8_t *label1_ptr, *label2_ptr;
+#endif
+
+ data_reg = *args++;
+ addr_reg = *args++;
+ mem_index = *args;
+ s_bits = opc & 3;
+
+ r0 = TCG_REG_16;
+ r1 = TCG_REG_17;
+
+#if defined(CONFIG_SOFTMMU)
+
+ tcg_out_mov(s, r1, addr_reg);
+ tcg_out_mov(s, r0, addr_reg);
+
+#if TARGET_LONG_BITS == 32
+ /* if VM is of 32-bit arch, clear higher 32-bit of addr */
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, r0, 0x0f, r0);
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, r1, 0x0f, r1);
+#endif
+
+ tgen_arithi(s, INSN_AND, r0, TARGET_PAGE_MASK|((1<<s_bits)-1));
+
+ tgen_arithi(s, INSN_SRL, r1, TARGET_PAGE_BITS-CPU_TLB_ENTRY_BITS);
+ tgen_arithi(s, INSN_AND, r1, (CPU_TLB_SIZE-1)<<CPU_TLB_ENTRY_BITS);
+
+ tcg_out_addi(s, r1, offsetof(CPUState, tlb_table[mem_index][0].addr_read));
+ tcg_out_fmt_opr(s, INSN_ADDQ, r1, TCG_REG_15, r1);
+#if TARGET_LONG_BITS == 32
+ tcg_out_fmt_mem(s, INSN_LDL, TMP_REG1, r1, 0);
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TMP_REG1, 0x0f, TMP_REG1);
+#else
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+#endif
+
+ //
+ // now, r0 contains the page# and TMP_REG1 contains the addr to tlb_entry.addr_read
+ // we below will compare them
+ //
+ tcg_out_fmt_opr(s, INSN_CMPEQ, TMP_REG1, r0, TMP_REG1);
+
+ tcg_out_mov(s, r0, addr_reg);
+#if TARGET_LONG_BITS == 32
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, r0, 0x0f, r0);
+#endif
+
+ //
+ // if equal, we jump to label1. since label1 is not resolved yet,
+ // we just record a relocation.
+ //
+ label1_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ //
+ // here, unequal, TLB-miss.
+ //
+ tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_17, mem_index);
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)qemu_ld_helpers[s_bits]);
+ tcg_out_push(s, addr_reg);
+ //tcg_out_push(s, TCG_REG_26);
+ //tcg_out_push(s, TCG_REG_15);
+ tcg_out_mov(s, TCG_REG_27, TMP_REG1);
+ tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, TMP_REG1, 0);
+ //tcg_out_pop(s, TCG_REG_15);
+ //tcg_out_pop(s, TCG_REG_26);
+ tcg_out_pop(s, addr_reg);
+
+ //
+ // after helper function call, the result of ld is saved in $0
+ //
+ switch(opc) {
+ case 0 | 4:
+ tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, TCG_REG_0, data_reg);
+ break;
+ case 1 | 4:
+ tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, TCG_REG_0, data_reg);
+ break;
+ case 2 | 4:
+ tcg_out_fmt_opr(s, INSN_ADDL, TCG_REG_0, TCG_REG_31, data_reg);
+ break;
+ case 0:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TCG_REG_0, 0x1, data_reg);
+ break;
+ case 1:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TCG_REG_0, 0x3, data_reg);
+ break;
+ case 2:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TCG_REG_0, 0xf, data_reg);
+ break;
+ case 3:
+ tcg_out_mov(s, data_reg, TCG_REG_0);
+ break;
+ default:
+ tcg_abort();
+ break;
+ }
+
+ //
+ // we have done, jmp to label2. label2 is not resolved yet,
+ // we record a relocation.
+ //
+ label2_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ // patch jmp to label1
+ val = (s->code_ptr - label1_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label1_ptr = (uint32_t) \
+ ( INSN_BNE | ( TMP_REG1 << 21 ) | ( val & 0x1fffff));
+
+ //
+ // if we get here, a TLB entry is hit, r0 contains the guest addr and
+ // r1 contains the ptr that point to tlb_entry.addr_read. what we should
+ // do is to load the tlb_entry.addend (64-bit on alpha) and add it to
+ // r0 to get the host VA
+ //
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, \
+ offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_read));
+ tcg_out_fmt_opr(s, INSN_ADDQ, r1, TMP_REG1, r1);
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+ tcg_out_fmt_opr(s, INSN_ADDQ, r0, TMP_REG1, r0);
+
+#else
+ r0 = addr_reg;
+#endif // endif defined(CONFIG_SOFTMMU)
+
+#ifdef TARGET_WORDS_BIGENDIAN
+ tcg_abort();
+#endif
+
+ //
+ // when we get here, r0 contains the host VA that can be used to access guest PA
+ //
+ switch(opc) {
+ case 0:
+ tcg_out_fmt_mem(s, INSN_LDBU, data_reg, r0, 0);
+ break;
+ case 0 | 4:
+ tcg_out_fmt_mem(s, INSN_LDBU, data_reg, r0, 0);
+ tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, data_reg, data_reg);
+ break;
+ case 1:
+ tcg_out_fmt_mem(s, INSN_LDWU, data_reg, r0, 0);
+ break;
+ case 1 | 4:
+ tcg_out_fmt_mem(s, INSN_LDWU, data_reg, r0, 0);
+ tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, data_reg, data_reg);
+ break;
+ case 2:
+ tcg_out_fmt_mem(s, INSN_LDL, data_reg, r0, 0);
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, data_reg, 0xf, data_reg);
+ break;
+ case 2 | 4:
+ tcg_out_fmt_mem(s, INSN_LDL, data_reg, r0, 0);
+ break;
+ case 3:
+ tcg_out_fmt_mem(s, INSN_LDQ, data_reg, r0, 0);
+ break;
+ default:
+ tcg_abort();
+ }
+
+#if defined(CONFIG_SOFTMMU)
+ /* label2: */
+ val = (s->code_ptr - label2_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label2_ptr = (uint32_t)( INSN_BR \
+ | ( TCG_REG_31 << 21 ) | ( val & 0x1fffff) );
+#endif
+}
+
+static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int opc)
+{
+ int addr_reg, data_reg, r0, r1, mem_index, s_bits;
+ tcg_target_long val;
+
+#if defined(CONFIG_SOFTMMU)
+ uint8_t *label1_ptr, *label2_ptr;
+#endif
+
+ data_reg = *args++;
+ addr_reg = *args++;
+ mem_index = *args;
+ s_bits = opc&3;
+
+ r0 = TCG_REG_16;
+ r1 = TCG_REG_17;
+
+#if defined(CONFIG_SOFTMMU)
+
+ tcg_out_mov(s, r1, addr_reg);
+ tcg_out_mov(s, r0, addr_reg);
+
+#if TARGET_LONG_BITS == 32
+ /* if VM is of 32-bit arch, clear higher 32-bit of addr */
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, r0, 0x0f, r0);
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, r1, 0x0f, r1);
+#endif
+
+ tgen_arithi(s, INSN_AND, r0, TARGET_PAGE_MASK | ((1 << s_bits) - 1));
+
+ tgen_arithi(s, INSN_SRL, r1, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
+ tgen_arithi(s, INSN_AND, r1, (CPU_TLB_SIZE-1) << CPU_TLB_ENTRY_BITS);
+
+ tcg_out_addi(s, r1, offsetof(CPUState, tlb_table[mem_index][0].addr_write));
+ tcg_out_fmt_opr(s, INSN_ADDQ, r1, TCG_REG_15, r1);
+
+#if TARGET_LONG_BITS == 32
+ tcg_out_fmt_mem(s, INSN_LDL, TMP_REG1, r1, 0);
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TMP_REG1, 0x0f, TMP_REG1);
+#else
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+#endif
+
+ //
+ // now, r0 contains the page# and TMP_REG1 contains the addr to tlb_entry.addr_read
+ // we below will compare them
+ //
+ tcg_out_fmt_opr(s, INSN_CMPEQ, TMP_REG1, r0, TMP_REG1);
+
+ tcg_out_mov(s, r0, addr_reg);
+#if TARGET_LONG_BITS == 32
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, r0, 0x0f, r0);
+#endif
+
+ //
+ // if equal, we jump to label1. since label1 is not resolved yet,
+ // we just record a relocation.
+ //
+ label1_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ // here, unequal, TLB-miss, ...
+ tcg_out_mov(s, TCG_REG_17, data_reg);
+ tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_18, mem_index);
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)qemu_st_helpers[s_bits]);
+
+ tcg_out_push(s, data_reg);
+ tcg_out_push(s, addr_reg);
+ //tcg_out_push(s, TCG_REG_26);
+ //tcg_out_push(s, TCG_REG_15);
+ tcg_out_mov(s, TCG_REG_27,TMP_REG1);
+ tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, TMP_REG1, 0);
+ //tcg_out_pop(s, TCG_REG_15);
+ //tcg_out_pop(s, TCG_REG_26);
+ tcg_out_pop(s, addr_reg);
+ tcg_out_pop(s, data_reg);
+
+ //
+ // we have done, jmp to label2. label2 is not resolved yet,
+ // we record a relocation.
+ //
+ label2_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ // patch jmp to label1
+ val = (s->code_ptr - label1_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label1_ptr = (uint32_t) \
+ ( INSN_BNE | ( TMP_REG1 << 21 ) | ( val & 0x1fffff));
+
+ //
+ // if we get here, a TLB entry is hit, r0 contains the guest addr and
+ // r1 contains the ptr that point to tlb_entry.addr_read. what we should
+ // do is to load the tlb_entry.addend (64-bit on alpha) and add it to
+ // r0 to get the host VA
+ //
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, \
+ offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_write));
+ tcg_out_fmt_opr(s, INSN_ADDQ, r1, TMP_REG1, r1);
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+ tcg_out_fmt_opr(s, INSN_ADDQ, r0, TMP_REG1, r0);
+
+#else
+ r0 = addr_reg;
+#endif
+
+#ifdef TARGET_WORDS_BIGENDIAN
+ tcg_abort();
+#endif
+
+ //
+ // when we get here, r0 contains the host VA that can be used to access guest PA
+ //
+ switch(opc) {
+ case 0:
+ tcg_out_fmt_mem(s, INSN_STB, data_reg, r0, 0);
+ break;
+ case 1:
+ tcg_out_fmt_mem(s, INSN_STW, data_reg, r0, 0);
+ break;
+ case 2:
+ tcg_out_fmt_mem(s, INSN_STL, data_reg, r0, 0);
+ break;
+ case 3:
+ tcg_out_fmt_mem(s, INSN_STQ, data_reg, r0, 0);
+ break;
+ default:
+ tcg_abort();
+ }
+
+#if defined(CONFIG_SOFTMMU)
+ /* patch jmp to label2: */
+ val = (s->code_ptr - label2_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label2_ptr = (uint32_t)( INSN_BR \
+ | ( TCG_REG_31 << 21 ) | ( val & 0x1fffff));
+#endif
+}
+
+static inline void tgen_ldxx( TCGContext *s, int ra, int rb, tcg_target_long disp, int flags)
+{
+ int opc_array[4] = { INSN_LDBU, INSN_LDWU, INSN_LDL, INSN_LDQ};
+ int opc = opc_array[flags & 3];
+
+ if ( _is_tmp_reg(ra) || _is_tmp_reg(rb))
+ tcg_abort();
+
+ if( disp != (int16_t)disp ) {
+ /* disp cannot be stored in insn directly */
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
+ tcg_out_fmt_opr(s, INSN_ADDQ, rb, TMP_REG1, TMP_REG1);
+ tcg_out_fmt_mem(s, opc, ra, TMP_REG1, 0);
+ } else {
+ tcg_out_fmt_mem(s, opc, ra, rb, disp);
+ }
+
+ switch ( flags & 7) {
+ case 0:
+ case 1:
+ case 2|4:
+ case 3:
+ break;
+ case 0|4:
+ tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, ra, ra);
+ break;
+ case 1|4:
+ tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, ra, ra);
+ break;
+ case 2:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, ra, 0x0f, ra);
+ break;
+ default:
+ tcg_abort();
+ }
+}
+
+static inline void tgen_stxx( TCGContext *s, int ra, int rb, tcg_target_long disp, int flags)
+{
+ int opc_array[4] = { INSN_STB, INSN_STW, INSN_STL, INSN_STQ};
+ int opc = opc_array[flags & 3];
+
+ if( disp != (int16_t)disp ) {
+ /* disp cannot be stored in insn directly */
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
+ tcg_out_fmt_opr(s, INSN_ADDQ, rb, TMP_REG1, TMP_REG1);
+ tcg_out_fmt_mem(s, opc, ra, TMP_REG1, 0);
+ } else {
+ tcg_out_fmt_mem(s, opc, ra, rb, disp);
+ }
+}
+
+static inline void tcg_out_op(TCGContext *s, \
+ int opc, const TCGArg *args, const int *const_args)
+{
+ int oc;
+ switch(opc)
+ {
+ case INDEX_op_exit_tb:
+ /*
+ * exit_tb t0, where t0 is always constant and should be returned to engine
+ * since we'll back to engine soon, $0 and $1 will never be used
+ */
+ tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_0, args[0]);
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)tb_ret_addr);
+ tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, TMP_REG1, 0);
+ break;
+
+ case INDEX_op_goto_tb:
+ /* goto_tb idx, where idx is constant 0 or 1, indicating the branch # */
+ if (s->tb_jmp_offset) {
+ /* we don't support direct jmp */
+ tcg_abort();
+ } else {
+ tcg_out_movi( s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)(s->tb_next + args[0]));
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, TMP_REG1, 0);
+ tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, TMP_REG1, 0);
+ }
+ s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;
+ break;
+
+ case INDEX_op_call:
+ if (const_args[0]) {
+ tcg_abort();
+ } else {
+ //tcg_out_push( s, TCG_REG_26);
+ //tcg_out_push( s, TCG_REG_15);
+ tcg_out_mov( s, TCG_REG_27, args[0]);
+ tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, args[0], 0);
+ //tcg_out_pop( s, TCG_REG_15);
+ //tcg_out_pop( s, TCG_REG_26);
+ }
+ break;
+
+ case INDEX_op_jmp:
+ if (const_args[0]) {
+ tcg_abort();
+ } else {
+ tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, args[0], 0);
+ }
+ break;
+
+ case INDEX_op_br:
+ tcg_out_br(s, args[0]);
+ break;
+
+ case INDEX_op_ld8u_i32:
+ case INDEX_op_ld8u_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 0);
+ break;
+ case INDEX_op_ld8s_i32:
+ case INDEX_op_ld8s_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 0|4);
+ break;
+ case INDEX_op_ld16u_i32:
+ case INDEX_op_ld16u_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 1);
+ break;
+ case INDEX_op_ld16s_i32:
+ case INDEX_op_ld16s_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 1|4);
+ break;\r
+ case INDEX_op_ld32u_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 2);
+ break;
+ case INDEX_op_ld_i32:
+ case INDEX_op_ld32s_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 2|4);
+ break;
+ case INDEX_op_ld_i64:
+ tgen_ldxx( s, args[0], args[1], args[2], 3);
+ break;
+
+ case INDEX_op_st8_i32:
+ case INDEX_op_st8_i64:
+ tgen_stxx( s, args[0], args[1], args[2], 0);
+ break;
+ case INDEX_op_st16_i32:
+ case INDEX_op_st16_i64:
+ tgen_stxx( s, args[0], args[1], args[2], 1);
+ break;
+ case INDEX_op_st_i32:
+ case INDEX_op_st32_i64:
+ tgen_stxx( s, args[0], args[1], args[2], 2);
+ break;
+ case INDEX_op_st_i64:
+ tgen_stxx( s, args[0], args[1], args[2], 3);
+ break;
+
+ case INDEX_op_add_i32:
+ case INDEX_op_add_i64:
+ oc = INSN_ADDQ;
+ goto gen_arith;
+ case INDEX_op_sub_i32:
+ case INDEX_op_sub_i64:
+ oc = INSN_SUBQ;
+ goto gen_arith;
+ case INDEX_op_mul_i32:
+ oc = INSN_MULL;
+ goto gen_arith;
+ case INDEX_op_mul_i64:
+ oc = INSN_MULQ;
+ goto gen_arith;
+ case INDEX_op_and_i32:
+ case INDEX_op_and_i64:
+ oc = INSN_AND;
+ goto gen_arith;
+ case INDEX_op_or_i32:
+ case INDEX_op_or_i64:
+ oc = INSN_BIS;
+ goto gen_arith;
+ case INDEX_op_xor_i32:
+ case INDEX_op_xor_i64:
+ oc = INSN_XOR;
+ goto gen_arith;
+ case INDEX_op_shl_i32:
+ case INDEX_op_shl_i64:
+ oc = INSN_SLL;
+ goto gen_arith;
+ case INDEX_op_shr_i32:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, args[1], 0x0f, args[1]);
+ case INDEX_op_shr_i64:
+ oc = INSN_SRL;
+ goto gen_arith;
+ case INDEX_op_sar_i32:
+ tcg_out_fmt_opr(s, INSN_ADDL, args[1], TCG_REG_31, args[1]);
+ case INDEX_op_sar_i64:
+ oc = INSN_SRA;
+ gen_arith:
+ if (const_args[2]) {
+ tcg_abort();
+ } else {
+ tcg_out_fmt_opr(s, oc, args[1], args[2], args[0]);
+ }
+ break;
+
+ case INDEX_op_brcond_i32:
+ tcg_out_fmt_opr(s, INSN_ADDL, args[0], TCG_REG_31, args[0]);
+ tcg_out_fmt_opr(s, INSN_ADDL, args[1], TCG_REG_31, args[1]);
+ tcg_out_brcond(s, args[2], args[0], args[1], const_args[1], args[3]);
+ break;
+ case INDEX_op_brcond_i64:
+ tcg_out_brcond(s, args[2], args[0], args[1], const_args[1], args[3]);
+ break;
+
+ case INDEX_op_ext8s_i32:
+ case INDEX_op_ext8s_i64:
+ tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, args[1], args[0]);
+ break;
+ case INDEX_op_ext16s_i32:
+ case INDEX_op_ext16s_i64:
+ tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, args[1], args[0]);
+ break;
+ case INDEX_op_ext32s_i64:
+ tcg_out_fmt_opr(s, INSN_ADDL, args[1], TCG_REG_31, args[0]);
+ break;
+
+ case INDEX_op_qemu_ld8u:
+ tcg_out_qemu_ld(s, args, 0);
+ break;
+ case INDEX_op_qemu_ld8s:
+ tcg_out_qemu_ld(s, args, 0 | 4);
+ break;
+ case INDEX_op_qemu_ld16u:
+ tcg_out_qemu_ld(s, args, 1);
+ break;
+ case INDEX_op_qemu_ld16s:
+ tcg_out_qemu_ld(s, args, 1 | 4);
+ break;
+ case INDEX_op_qemu_ld32u:
+ tcg_out_qemu_ld(s, args, 2);
+ break;
+ case INDEX_op_qemu_ld32s:
+ tcg_out_qemu_ld(s, args, 2 | 4);
+ break;
+ case INDEX_op_qemu_ld64:
+ tcg_out_qemu_ld(s, args, 3);
+ break;
+
+ case INDEX_op_qemu_st8:
+ tcg_out_qemu_st(s, args, 0);
+ break;
+ case INDEX_op_qemu_st16:
+ tcg_out_qemu_st(s, args, 1);
+ break;
+ case INDEX_op_qemu_st32:
+ tcg_out_qemu_st(s, args, 2);
+ break;
+ case INDEX_op_qemu_st64:
+ tcg_out_qemu_st(s, args, 3);
+ break;
+
+ case INDEX_op_movi_i32:
+ case INDEX_op_movi_i64:
+ case INDEX_op_mov_i32:
+ case INDEX_op_mov_i64:
+ case INDEX_op_div2_i32:
+ case INDEX_op_divu2_i32:
+ default:
+ tcg_abort();
+ }
+}
+
+static const TCGTargetOpDef alpha_op_defs[] = {
+ { INDEX_op_exit_tb, { } },
+ { INDEX_op_goto_tb, { } },
+ { INDEX_op_call, { "r" } },
+ { INDEX_op_jmp, { "r" } },
+ { INDEX_op_br, { } },
+
+ { INDEX_op_mov_i32, { "r", "r" } },
+ { INDEX_op_movi_i32, { "r" } },
+ { INDEX_op_ld8u_i32, { "r", "r" } },
+ { INDEX_op_ld8s_i32, { "r", "r" } },
+ { INDEX_op_ld16u_i32, { "r", "r" } },
+ { INDEX_op_ld16s_i32, { "r", "r" } },
+ { INDEX_op_ld_i32, { "r", "r" } },
+ { INDEX_op_st8_i32, { "r", "r" } },
+ { INDEX_op_st16_i32, { "r", "r" } },
+ { INDEX_op_st_i32, { "r", "r" } },
+
+ { INDEX_op_add_i32, { "r", "0", "r" } },
+ { INDEX_op_mul_i32, { "r", "0", "r" } },
+ //{ INDEX_op_div2_i32, { "a", "d", "0", "1", "r" } },
+ //{ INDEX_op_divu2_i32, { "a", "d", "0", "1", "r" } },
+ { INDEX_op_sub_i32, { "r", "0", "r" } },
+ { INDEX_op_and_i32, { "r", "0", "r" } },
+ { INDEX_op_or_i32, { "r", "0", "r" } },
+ { INDEX_op_xor_i32, { "r", "0", "r" } },
+
+ { INDEX_op_shl_i32, { "r", "0", "r" } },
+ { INDEX_op_shr_i32, { "r", "0", "r" } },
+ { INDEX_op_sar_i32, { "r", "0", "r" } },
+
+ { INDEX_op_brcond_i32, { "r", "r" } },
+
+ { INDEX_op_mov_i64, { "r", "r" } },
+ { INDEX_op_movi_i64, { "r" } },
+ { INDEX_op_ld8u_i64, { "r", "r" } },
+ { INDEX_op_ld8s_i64, { "r", "r" } },
+ { INDEX_op_ld16u_i64, { "r", "r" } },
+ { INDEX_op_ld16s_i64, { "r", "r" } },
+ { INDEX_op_ld32u_i64, { "r", "r" } },
+ { INDEX_op_ld32s_i64, { "r", "r" } },
+ { INDEX_op_ld_i64, { "r", "r" } },
+ { INDEX_op_st8_i64, { "r", "r" } },
+ { INDEX_op_st16_i64, { "r", "r" } },
+ { INDEX_op_st32_i64, { "r", "r" } },
+ { INDEX_op_st_i64, { "r", "r" } },
+
+ { INDEX_op_add_i64, { "r", "0", "r" } },
+ { INDEX_op_mul_i64, { "r", "0", "r" } },
+ //{ INDEX_op_div2_i64, { "a", "d", "0", "1", "r" } },
+ //{ INDEX_op_divu2_i64, { "a", "d", "0", "1", "r" } },
+ { INDEX_op_sub_i64, { "r", "0", "r" } },
+ { INDEX_op_and_i64, { "r", "0", "r" } },
+ { INDEX_op_or_i64, { "r", "0", "r" } },
+ { INDEX_op_xor_i64, { "r", "0", "r" } },
+
+ { INDEX_op_shl_i64, { "r", "0", "r" } },
+ { INDEX_op_shr_i64, { "r", "0", "r" } },
+ { INDEX_op_sar_i64, { "r", "0", "r" } },
+
+ { INDEX_op_brcond_i64, { "r", "r" } },
+
+ { INDEX_op_ext8s_i32, { "r", "r"} },
+ { INDEX_op_ext16s_i32, { "r", "r"} },
+ { INDEX_op_ext8s_i64, { "r", "r"} },
+ { INDEX_op_ext16s_i64, { "r", "r"} },
+ { INDEX_op_ext32s_i64, { "r", "r"} },
+
+ { INDEX_op_qemu_ld8u, { "r", "L" } },
+ { INDEX_op_qemu_ld8s, { "r", "L" } },
+ { INDEX_op_qemu_ld16u, { "r", "L" } },
+ { INDEX_op_qemu_ld16s, { "r", "L" } },
+ { INDEX_op_qemu_ld32u, { "r", "L" } },
+ { INDEX_op_qemu_ld32s, { "r", "L" } },
+ { INDEX_op_qemu_ld64, { "r", "L" } },
+
+ { INDEX_op_qemu_st8, { "L", "L" } },
+ { INDEX_op_qemu_st16, { "L", "L" } },
+ { INDEX_op_qemu_st32, { "L", "L" } },
+ //{ INDEX_op_qemu_st64, { "L", "L", "L"} },
+ { INDEX_op_qemu_st64, { "L", "L"} },
+ { -1 },
+};
+
+
+static int tcg_target_callee_save_regs[] = {
+ TCG_REG_15, // used for the global env, so no need to save
+ TCG_REG_9,
+ TCG_REG_10,
+ TCG_REG_11,
+ TCG_REG_12,
+ TCG_REG_13,
+ TCG_REG_14
+};
+
+/*
+ * Generate global QEMU prologue and epilogue code
+*/
+void tcg_target_qemu_prologue(TCGContext *s)
+{
+ int i, frame_size, push_size, stack_addend;
+
+ /* TB prologue */
+ /*printf("TB prologue @ %lx\n", s->code_ptr);*/
+
+ /* save TCG_REG_26 */
+ tcg_out_push(s, TCG_REG_26);
+ tcg_out_push(s, TCG_REG_27);
+ tcg_out_push(s, TCG_REG_28);
+ tcg_out_push(s, TCG_REG_29);
+
+ /* save all callee saved registers */
+ for(i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
+ tcg_out_push(s, tcg_target_callee_save_regs[i]);
+ }
+
+ /* reserve some stack space */
+ push_size = 8 + (4 + ARRAY_SIZE(tcg_target_callee_save_regs)) * 8;
+ frame_size = push_size + 4*TCG_STATIC_CALL_ARGS_SIZE;
+ frame_size = (frame_size + TCG_TARGET_STACK_ALIGN - 1) & ~(TCG_TARGET_STACK_ALIGN - 1);
+ stack_addend = frame_size - push_size;
+ tcg_out_addi(s, TCG_REG_30, -stack_addend);
+
+ tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, TCG_REG_16, 0); /* jmp $16 */
+
+ /* TB epilogue */
+ tb_ret_addr = s->code_ptr;
+ tcg_out_addi(s, TCG_REG_30, stack_addend);
+ for(i = ARRAY_SIZE(tcg_target_callee_save_regs) - 1; i >= 0; i--) {
+ tcg_out_pop(s, tcg_target_callee_save_regs[i]);
+ }
+
+ tcg_out_pop(s, TCG_REG_29);
+ tcg_out_pop(s, TCG_REG_28);
+ tcg_out_pop(s, TCG_REG_27);
+ tcg_out_pop(s, TCG_REG_26);
+ tcg_out_fmt_jmp(s, INSN_RET, TCG_REG_31, TCG_REG_26, 0); /* ret */
+}
+
+
+void tcg_target_init(TCGContext *s)
+{
+ /* fail safe */
+ if ((1 << CPU_TLB_ENTRY_BITS) != sizeof(CPUTLBEntry))
+ tcg_abort();
+
+ tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffffffff);
+ tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffffffff);
+ tcg_regset_set32(tcg_target_call_clobber_regs, 0,
+ (1 << TCG_REG_1 ) | (1 << TCG_REG_2 ) | (1 << TCG_REG_3 ) | (1 << TCG_REG_4 ) |
+ (1 << TCG_REG_5 ) | (1 << TCG_REG_6 ) | (1 << TCG_REG_7 ) | (1 << TCG_REG_8 ) |
+ (1 << TCG_REG_22) | (1 << TCG_REG_23) | (1 << TCG_REG_24) | (1 << TCG_REG_25) |
+ (1 << TCG_REG_16) | (1 << TCG_REG_17) | (1 << TCG_REG_18) | (1 << TCG_REG_19) |
+ (1 << TCG_REG_20) | (1 << TCG_REG_21) | (1 << TCG_REG_0 ));
+
+ //tcg_regset_set32( tcg_target_call_clobber_regs, 0, 0xffffffff);
+
+ tcg_regset_clear(s->reserved_regs);
+ // $26~$31 not allocated by tcg.c
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_26);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_27);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_28);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_29);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_30);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_31);
+ // resved registers for tmp usage
+ tcg_regset_set_reg(s->reserved_regs, TMP_REG1);
+ tcg_regset_set_reg(s->reserved_regs, TMP_REG2);
+ tcg_regset_set_reg(s->reserved_regs, TMP_REG3);
+
+ tcg_add_target_add_op_defs(alpha_op_defs);
+}
+
diff --git a/tcg/alpha/tcg-target.h b/tcg/alpha/tcg-target.h
new file mode 100644
index 0000000..79c57af
--- /dev/null
+++ b/tcg/alpha/tcg-target.h
@@ -0,0 +1,70 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#define TCG_TARGET_ALPHA 1
+
+#define TCG_TARGET_REG_BITS 64
+
+#define TCG_TARGET_NB_REGS 32
+
+enum {
+ TCG_REG_0 = 0, TCG_REG_1, TCG_REG_2, TCG_REG_3,
+ TCG_REG_4, TCG_REG_5, TCG_REG_6, TCG_REG_7,
+ TCG_REG_8, TCG_REG_9, TCG_REG_10, TCG_REG_11,
+ TCG_REG_12, TCG_REG_13, TCG_REG_14, TCG_REG_15,
+ TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19,
+ TCG_REG_20, TCG_REG_21, TCG_REG_22, TCG_REG_23,
+ TCG_REG_24, TCG_REG_25, TCG_REG_26, TCG_REG_27,
+ TCG_REG_28, TCG_REG_29, TCG_REG_30, TCG_REG_31
+};
+
+/* used for function call generation */
+#define TCG_REG_CALL_STACK TCG_REG_30
+#define TCG_TARGET_STACK_ALIGN 16
+#define TCG_TARGET_CALL_STACK_OFFSET 0
+
+/* we have signed extension instructions */
+#define TCG_TARGET_HAS_ext8s_i32
+#define TCG_TARGET_HAS_ext16s_i32
+#define TCG_TARGET_HAS_ext8s_i64
+#define TCG_TARGET_HAS_ext16s_i64
+#define TCG_TARGET_HAS_ext32s_i64
+
+/* Note: must be synced with dyngen-exec.h */
+#define TCG_AREG0 TCG_REG_15
+#define TCG_AREG1 TCG_REG_9
+#define TCG_AREG2 TCG_REG_10
+#define TCG_AREG3 TCG_REG_11
+#define TCG_AREG4 TCG_REG_12
+#define TCG_AREG5 TCG_REG_13
+#define TCG_AREG6 TCG_REG_14
+
+#define TMP_REG1 TCG_REG_23
+#define TMP_REG2 TCG_REG_24
+#define TMP_REG3 TCG_REG_25
+
+static inline void flush_icache_range(unsigned long start, unsigned long stop)
+{
+ __asm__ __volatile__ ("call_pal 0x86");
+}
+
--
1.6.3.3
^ permalink raw reply related [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-20 17:19 [Qemu-devel] [PATCH] Porting TCG to alpha platform identifier scorpio
@ 2010-01-20 21:26 ` Richard Henderson
0 siblings, 0 replies; 21+ messages in thread
From: Richard Henderson @ 2010-01-20 21:26 UTC (permalink / raw)
To: identifier scorpio; +Cc: qemu-devel
On 01/20/2010 09:19 AM, identifier scorpio wrote:
> Below i'll append my newly generated patch against stable-0.10,
> in case it is mangled, i also put it in the attachment.
For the record, the inline portion was again mangled; the attachment is
fine.
> in qemu_ld/st, we must use $16,$17,$18 as temporaries,
> because pass them as argument to helper functions such as qemu_ld/st_helpers[].
Ah, yes, I forgot about that.
>> With I/J constraints you don't need this special casing.
>
> I'm not very familiar with I/J constraints and i'll study them later.
I = uint8_t, to be used with the second arithmetic input.
J = 0, to be used with the first arithmetic input (i.e. $31).
>>> + tcg_out_inst2(s, opc^4,
>> TMP_REG1, 1);
>>> + /* record relocation infor */
>>> + tcg_out_reloc(s,
>> s->code_ptr, R_ALPHA_REFQUAD, label_index, 0);
>>> + s->code_ptr += 4;
>>
>> Bug: You've applied the relocation to the wrong
>> instruction.
>> Bug: What's with the "opc^4"?
>>
>
> what did you mean that i "applied the relocation to the wrong
> instruction", couldn't i apply relocation to INDEX_op_brcond_i32 operation?
With tcg_out_inst2 you emit the branch instruction, which calls
tcg_out32, which increments s->code_ptr. Next you call tcg_out_reloc
with the updated s->code_ptr, which means that the relocation gets
applied to the instruction *after* the branch. Finally, you increment
s->code_ptr *again*, which means that the instruction after the branch
is in fact completely uninitialized.
> and opc^4 here is used to toggle between OP_BLBC(opcode 0x38) and OP_BLBS(opcode 0x3c), ugly code :)
It does beg the question of why you're reversing the sense of the jump
at all. Just because the branch is forward doesn't mean its condition
should be changed. I think that's definitely a bug. The sense of the
jump should be exactly the same, never mind the direction of the jump.
Oh... I see what you're doing here -- you're generating the entire
branch instruction in patch_reloc, and you're generating branch over
branch here. That's both confusing and unnecessary.
We should do
static void patch_reloc(uint8_t *x_ptr, int type,
tcg_target_long value,
tcg_target_long addend)
{
uint32_t *code_ptr = (uint32_t *)x;
uint32_t insn = *code_ptr;
value += addend;
switch (type) {
case R_ALPHA_BRADDR:
value -= (long)x_ptr + 4;
if ((value & 3) || value < -0x400000 || value >= 0x400000) {
tcg_abort();
}
*code_ptr = insn | INSN_DISP21(val >> 2);
break;
default:
tcg_abort();
}
}
so as to apply the branch address relocation to the existing insn.
Which lets you write
static void tcg_out_br(TCGContext *s, int opc, int ra, int label_index)
{
TCGLabel *l = &s->labels[label_index];
tcg_target_long value;
if (l->has_value) {
value = l->u.value;
value -= (long)s->code_ptr + 4;
if ((value & 3) || value < -0x400000 || value >= 0x400000) {
tcg_abort();
}
value >>= 2;
} else {
tcg_out_reloc(s, s->code_ptr, R_ALPHA_BRADDR, label_index, 0);
value = 0;
}
tcg_out_fmt_br(s, opc, ra, value);
}
static void tcg_out_brcond(TCGContext *s, ...)
{
// Emit comparison into TMP_REG1.
opc = (cond & 1) ? INSN_BLBC : INSN_BLBS;
tcg_out_br(s, opc, TMP_REG1, label_index);
}
Isn't that much clearer?
> + tcg_out_mov(s, r1, addr_reg);
> + tcg_out_mov(s, r0, addr_reg);
> +
> +#if TARGET_LONG_BITS == 32
> + /* if VM is of 32-bit arch, clear higher 32-bit of addr */
> + tcg_out_fmt_opi(s, INSN_ZAPNOT, r0, 0x0f, r0);
> + tcg_out_fmt_opi(s, INSN_ZAPNOT, r1, 0x0f, r1);
> +#endif
I suggest creating a
static inline tcg_out_mov_addr(TCGContext *s, int rd, int rs)
{
if (TARGET_LONG_BITS == 32) {
tcg_out_fmt_opi(s, INSN_ZAPNOT, rs, 0x0f, rd);
} else {
tcg_out_mov(s, rd, rs);
}
}
and using that throughout qemu_ld/st. That will save some redundant
moves you are creating there, as well as removing some conditional
compilation. Indeed, I would suggest replacing all of the conditional
compilation vs TARGET_LONG_BITS with normal if's.
... Of course, in this particular case, that zapnot is redundant with
the INSN_AND that follows, for both R0 and R1.
> + tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)qemu_ld_helpers[s_bits]);
> + tcg_out_push(s, addr_reg);
> + //tcg_out_push(s, TCG_REG_26);
> + //tcg_out_push(s, TCG_REG_15);
> + tcg_out_mov(s, TCG_REG_27, TMP_REG1);
> + tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, TMP_REG1, 0);
> + //tcg_out_pop(s, TCG_REG_15);
> + //tcg_out_pop(s, TCG_REG_26);
> + tcg_out_pop(s, addr_reg);
You need not save and restore ADDR_REG; it is not used after the call.
Also, you can load the address into $27 directly and not use the temp.
> + *(uint32_t *)label1_ptr = (uint32_t) \
> + ( INSN_BNE | ( TMP_REG1 << 21 ) | ( val & 0x1fffff));
Frankly, I don't really think it's worth being so convoluted with the
branches in here. I know that's the way that the i386 port does it in
qemu_ld/st, but I think we should rather pattern it after the i386 brcond2.
I.e. use gen_new_label to create a new label for use within the routine,
use a normal call into tcg_out_br to generate the branch, and use
tcg_out_label to place the label at the proper place and resolve the
forward branch.
It may be be a teeny bit less efficient, but it's far clearer.
> + tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, \
> + offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_read));
> + tcg_out_fmt_opr(s, INSN_ADDQ, r1, TMP_REG1, r1);
> + tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
You may want to use
tcg_out_ld(s, TCG_TYPE_I64, TMP_REG1, r1, offsetof ...);
for clarity, and to reuse the tcg_out_op_long improvements.
> +#else
> + r0 = addr_reg;
> +#endif // endif defined(CONFIG_SOFTMMU)
Missing GUEST_BASE handling, though that won't help your winnt...
>>> + case INDEX_op_sar_i32:
>>> + tcg_out_inst4i(s,
>> OP_SHIFT, args[1], 32, FUNC_SLL, args[1]);
>>> + tcg_out_inst4i(s,
>> OP_SHIFT, args[1], 32, FUNC_SRA, args[1]);
>>
>> That last shift can be combined with the requested shift
>> via addition. For constant input, this saves an insn; for
>> register input, the addition can be done in parallel with
>> the first shift.
>
> i changed to use "addl r, 0, r" here.
Even better.
> I think when qemu met x86 divide instructions, it will call helper
> functions to simulate them, must i define div_i32/divu_i32/...?
If you want to emulate anything other than x86, yes.
r~
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
@ 2010-01-21 3:42 identifier scorpio
2010-01-21 18:18 ` Stefan Weil
0 siblings, 1 reply; 21+ messages in thread
From: identifier scorpio @ 2010-01-21 3:42 UTC (permalink / raw)
To: Stefan Weil; +Cc: qemu-devel
[-- Attachment #1: Type: text/plain, Size: 636 bytes --]
Thank Mr. Weil for your reply.
>
> Maybe you can also try the TCG interpreter (TCI) from
> http://repo.or.cz/w/qemu/ar7.git.
> In theory, it supports any host architecture with or
> without native TCG
> support.
>
> It was tested successful with some basic tests on x86,
> mips, ppc and arm,
> so I hope it will run on alpha, too.
>
so that means i have to learn another set of interface?
is TCI more simple or straightforward than TCG?
Dong Weiyu.
___________________________________________________________
好玩贺卡等你发，邮箱贺卡全新上线！
http://card.mail.cn.yahoo.com/
[-- Attachment #2: Type: text/html, Size: 836 bytes --]
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-21 3:42 identifier scorpio
@ 2010-01-21 18:18 ` Stefan Weil
0 siblings, 0 replies; 21+ messages in thread
From: Stefan Weil @ 2010-01-21 18:18 UTC (permalink / raw)
To: identifier scorpio; +Cc: qemu-devel
identifier scorpio schrieb:
> Thank Mr. Weil for your reply.
>
> >
> > Maybe you can also try the TCG interpreter (TCI) from
> > http://repo.or.cz/w/qemu/ar7.git.
> > In theory, it supports any host architecture with or
> > without native TCG
> > support.
> >
> > It was tested successful with some basic tests on x86,
> > mips, ppc and arm,
> > so I hope it will run on alpha, too.
> >
>
> so that means i have to learn another set of interface?
> is TCI more simple or straightforward than TCG?
>
> Dong Weiyu.
>
>
> ------------------------------------------------------------------------
> 好玩贺卡等你发，邮箱贺卡全新上线！
> <http://cn.rd.yahoo.com/mail_cn/tagline/card/*http://card.mail.cn.yahoo.com/>
Hello,
No, you don't have to learn a new interface.
Just use it:
configure --enable-tcg-interpreter
make
and run it on alpha. It will be a little slower
than a native tcg implementation for alpha
because tcg code is interpreted at runtime.
Stefan Weil
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
@ 2010-01-22 15:47 identifier scorpio
2010-01-22 18:00 ` Richard Henderson
2010-01-26 1:19 ` Richard Henderson
0 siblings, 2 replies; 21+ messages in thread
From: identifier scorpio @ 2010-01-22 15:47 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel
[-- Attachment #1.1: Type: text/plain, Size: 989 bytes --]
Hi, Richard.
I almost re-write the whole code under your help and now it seems somehow elegant. Unfortunately, it still can't run MS windows, I wonder whether there are some other special places in QEMU to be modifed for alpha case, beside the 3 files (cpu-all.h/tcg-target.c/tcg-target.h) I write or modified.
Is there any good method to find the bug except "guess and try"? And it seems that few people is interested in porting QEMU/TCG to alpha platform, why? just because alpha machine is disappearing? And may the patch in current stage be accepted by QEMU, i just want to attract more eye-balls and to get things done.
Anyhow, I'll continue to work on it and any help from you will be appreciated. I append the newest patch in attachment, please take a look if it doesn't waste too much your time.
Thanks.
Dong Weiyu
___________________________________________________________
好玩贺卡等你发，邮箱贺卡全新上线！
http://card.mail.cn.yahoo.com/
[-- Attachment #1.2: Type: text/html, Size: 1142 bytes --]
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: 0001-Porting-TCG-to-alpha-platform.v2.patch --]
[-- Type: text/x-patch; name="0001-Porting-TCG-to-alpha-platform.v2.patch", Size: 37704 bytes --]
From d51491a60ccf9ab91eb963ba07be2e590afda71d Mon Sep 17 00:00:00 2001
From: Dong Weiyu <cidentifier@yahoo.com.cn>
Date: Fri, 22 Jan 2010 23:10:43 +0800
Subject: [PATCH] Porting TCG to alpha platform
---
cpu-all.h | 2 +-
tcg/alpha/tcg-target.c | 1081 ++++++++++++++++++++++++++++++++++++++++++++++++
tcg/alpha/tcg-target.h | 68 +++
3 files changed, 1150 insertions(+), 1 deletions(-)
create mode 100644 tcg/alpha/tcg-target.c
create mode 100644 tcg/alpha/tcg-target.h
diff --git a/cpu-all.h b/cpu-all.h
index e0c3efd..bdf6fb2 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -22,7 +22,7 @@
#include "qemu-common.h"
-#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__)
+#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__) || defined(__alpha__)
#define WORDS_ALIGNED
#endif
diff --git a/tcg/alpha/tcg-target.c b/tcg/alpha/tcg-target.c
new file mode 100644
index 0000000..977c9b1
--- /dev/null
+++ b/tcg/alpha/tcg-target.c
@@ -0,0 +1,1081 @@
+/*
+ * Tiny Code Generator for QEMU on ALPHA platform
+*/
+
+#ifndef NDEBUG
+static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
+ "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
+ "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
+ "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
+ "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31",
+};
+#endif
+
+/*
+ * $26, $27, $29, $30, $31 are special, reserved,
+ * $28 is reserved as temporary register.
+*/
+static const int tcg_target_reg_alloc_order[] = {
+ TCG_REG_9, TCG_REG_10, TCG_REG_11, TCG_REG_12, TCG_REG_13, TCG_REG_14,
+ TCG_REG_1, TCG_REG_2, TCG_REG_3, TCG_REG_4, TCG_REG_5, TCG_REG_6,
+ TCG_REG_7, TCG_REG_8, TCG_REG_22, TCG_REG_23, TCG_REG_24, TCG_REG_25,
+ TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19, TCG_REG_20, TCG_REG_21
+};
+
+/*
+ * according to alpha calling convention, these 6 registers are used for
+ * function parameter passing. if function has more than 6 parameters, remained
+ * ones are stored on stack.
+*/
+static const int tcg_target_call_iarg_regs[6] = {
+ TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19, TCG_REG_20, TCG_REG_21
+};
+
+/*
+ * according to alpha calling convention, $0 is used for returning function result.
+*/
+static const int tcg_target_call_oarg_regs[1] = { TCG_REG_0 };
+
+/*
+ * save the address of TB's epilogue.
+*/
+static uint8_t *tb_ret_addr;
+
+#define INSN_OP(x) (((x) & 0x3f) << 26)
+#define INSN_FUNC1(x) (((x) & 0x3) << 14)
+#define INSN_FUNC2(x) (((x) & 0x7f) << 5)
+#define INSN_RA(x) (((x) & 0x1f) << 21)
+#define INSN_RB(x) (((x) & 0x1f) << 16)
+#define INSN_RC(x) ((x) & 0x1f)
+#define INSN_LIT(x) (((x) & 0xff) << 13)
+#define INSN_DISP16(x) ((x) & 0xffff)
+#define INSN_DISP21(x) ((x) & 0x1fffff)
+#define INSN_RSVED(x) ((x) & 0x3fff)
+
+#define INSN_JMP (INSN_OP(0x1a) | INSN_FUNC1(0))
+#define INSN_CALL (INSN_OP(0x1a) | INSN_FUNC1(1))
+#define INSN_RET (INSN_OP(0x1a) | INSN_FUNC1(2))
+#define INSN_BR INSN_OP(0x30)
+#define INSN_BEQ INSN_OP(0x39)
+#define INSN_BNE INSN_OP(0x3d)
+#define INSN_BLBC INSN_OP(0x38)
+#define INSN_BLBS INSN_OP(0x3c)
+#define INSN_ADDL (INSN_OP(0x10) | INSN_FUNC2(0))
+#define INSN_SUBL (INSN_OP(0x10) | INSN_FUNC2(0x9))
+#define INSN_ADDQ (INSN_OP(0x10) | INSN_FUNC2(0x20))
+#define INSN_SUBQ (INSN_OP(0x10) | INSN_FUNC2(0x29))
+#define INSN_CMPEQ (INSN_OP(0x10) | INSN_FUNC2(0x2d))
+#define INSN_CMPLT (INSN_OP(0x10) | INSN_FUNC2(0x4d))
+#define INSN_CMPLE (INSN_OP(0x10) | INSN_FUNC2(0x6d))
+#define INSN_CMPULT (INSN_OP(0x10) | INSN_FUNC2(0x1d))
+#define INSN_CMPULE (INSN_OP(0x10) | INSN_FUNC2(0x3d))
+#define INSN_MULL (INSN_OP(0x13) | INSN_FUNC2(0))
+#define INSN_MULQ (INSN_OP(0x13) | INSN_FUNC2(0x20))
+#define INSN_AND (INSN_OP(0x11) | INSN_FUNC2(0))
+#define INSN_BIS (INSN_OP(0x11) | INSN_FUNC2(0x20))
+#define INSN_XOR (INSN_OP(0x11) | INSN_FUNC2(0x40))
+#define INSN_SLL (INSN_OP(0x12) | INSN_FUNC2(0x39))
+#define INSN_SRL (INSN_OP(0x12) | INSN_FUNC2(0x34))
+#define INSN_SRA (INSN_OP(0x12) | INSN_FUNC2(0x3c))
+#define INSN_ZAPNOT (INSN_OP(0x12) | INSN_FUNC2(0x31))
+#define INSN_SEXTB (INSN_OP(0x1c) | INSN_FUNC2(0))
+#define INSN_SEXTW (INSN_OP(0x1c) | INSN_FUNC2(0x1))
+#define INSN_LDA INSN_OP(0x8)
+#define INSN_LDAH INSN_OP(0x9)
+#define INSN_LDBU INSN_OP(0xa)
+#define INSN_LDWU INSN_OP(0xc)
+#define INSN_LDL INSN_OP(0x28)
+#define INSN_LDQ INSN_OP(0x29)
+#define INSN_STB INSN_OP(0xe)
+#define INSN_STW INSN_OP(0xd)
+#define INSN_STL INSN_OP(0x2c)
+#define INSN_STQ INSN_OP(0x2d)
+
+/*
+ * return the # of regs used for parameter passing on procedure calling.
+ * note that alpha use $16~$21 to transfer the first 6 paramenters of a procedure.
+*/
+static inline int tcg_target_get_call_iarg_regs_count(int flags)
+{
+ return 6;
+}
+
+/*
+ * given constraint, return available register set. this function is called once
+ * for each op at qemu's initialization stage.
+*/
+static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
+{
+ const char *ct_str = *pct_str;
+
+ switch(ct_str[0])
+ {
+ case 'r':
+ /* constaint 'r' means any register is okay */
+ ct->ct |= TCG_CT_REG;
+ tcg_regset_set32(ct->u.regs, 0, 0xffffffffu);
+ break;
+
+ case 'L':
+ /* constraint for qemu_ld/st */
+ ct->ct |= TCG_CT_REG;
+ tcg_regset_set32(ct->u.regs, 0, 0xffffffffu);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_0);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_16);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_17);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_18);
+ break;
+
+ default:
+ return -1;
+ }
+
+ ct_str++;
+ *pct_str = ct_str;
+ return 0;
+}
+
+static inline int tcg_target_const_match( \
+ tcg_target_long val, const TCGArgConstraint *arg_ct)
+{
+ int ct = arg_ct->ct;
+ return (ct & TCG_CT_CONST) ? 1 : 0;
+}
+
+static inline void tcg_out_fmt_br(TCGContext *s, int opc, int ra, int disp)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_DISP21(disp));
+}
+
+static inline void tcg_out_fmt_mem(TCGContext *s, int opc, int ra, int rb, int disp)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_RB(rb)|INSN_DISP16(disp));
+}
+
+static inline void tcg_out_fmt_jmp(TCGContext *s, int opc, int ra, int rb, int rsved)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_RB(rb)|INSN_RSVED(rsved));
+}
+
+static inline void tcg_out_fmt_opr(TCGContext *s, int opc, int ra, int rb, int rc)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_RB(rb)|INSN_RC(rc));
+}
+
+static inline void tcg_out_fmt_opi(TCGContext *s, int opc, int ra, int lit, int rc)
+{
+ tcg_out32(s, (opc)|INSN_RA(ra)|INSN_LIT(lit)|INSN_RC(rc)|(1<<12));
+}
+
+/*
+ * mov from a reg to another
+*/
+static inline void tcg_out_mov(TCGContext *s, int rc, int rb)
+{
+ if ( rb != rc ) {
+ tcg_out_fmt_opr(s, INSN_BIS, TCG_REG_31, rb, rc);
+ }
+}
+
+static inline int _is_tmp_reg( int r)
+{
+ return (r == TMP_REG1);
+}
+
+static void tcg_out_movi( TCGContext *s, \
+ TCGType type, int ra, tcg_target_long orig)
+{
+ long l0, l1, l2=0, l3=0, extra=0;
+ tcg_target_long val = orig;
+ int rs = TCG_REG_31;
+
+ if ( type == TCG_TYPE_I32)
+ val = (int32_t)val;
+
+ l0 = (int16_t)val;
+ val = (val - l0) >> 16;
+ l1 = (int16_t)val;
+
+ if ( orig >> 31 == -1 || orig >> 31 == 0) {
+ if ( l1 < 0 && orig >= 0) {
+ extra = 0x4000;
+ l1 = (int16_t)(val - 0x4000);
+ }
+ } else {
+ val = (val - l1) >> 16;
+ l2 = (int16_t)val;
+ val = (val - l2) >> 16;
+ l3 = (int16_t)val;
+
+ if (l3) {
+ tcg_out_fmt_mem(s, INSN_LDAH, ra, rs, l3);
+ rs = ra;
+ }
+ if (l2) {
+ tcg_out_fmt_mem(s, INSN_LDA, ra, rs, l2);
+ rs = ra;
+ }
+ if ( l3 || l2)
+ tcg_out_fmt_opi(s, INSN_SLL, ra, 32, ra);
+ }
+
+ if (l1) {
+ tcg_out_fmt_mem(s, INSN_LDAH, ra, rs, l1);
+ rs = ra;
+ }
+ if (extra) {
+ tcg_out_fmt_mem(s, INSN_LDAH, ra, rs, extra);
+ rs = ra;
+ }
+
+ tcg_out_fmt_mem(s, INSN_LDA, ra, rs, l0);
+}
+
+static void tcg_out_ldst( TCGContext *s, \
+ int opc, int ra, int rb, tcg_target_long disp, int sext)
+{
+ if ( _is_tmp_reg(ra) || _is_tmp_reg(rb))
+ tcg_abort();
+
+ if (disp != (int16_t)disp) {
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
+ tcg_out_fmt_opr(s, INSN_ADDQ, rb, TMP_REG1, TMP_REG1);
+ tcg_out_fmt_mem(s, opc, ra, TMP_REG1, 0);
+ } else {
+ tcg_out_fmt_mem(s, opc, ra, rb, disp);
+ }
+
+ switch ( opc) {
+ case INSN_STB:
+ case INSN_STW:
+ case INSN_STL:
+ case INSN_STQ:
+ break;
+ case INSN_LDBU:
+ if ( sext)
+ tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, ra, ra);
+ break;
+ case INSN_LDWU:
+ if ( sext)
+ tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, ra, ra);
+ break;
+ case INSN_LDL:
+ if ( !sext)
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, ra, 0xf, ra);
+ break;
+ case INSN_LDQ:
+ break;
+ default:
+ tcg_abort();
+ }
+}
+
+static void tcg_out_ld( TCGContext *s, \
+ int type, int ra, int rb, tcg_target_long disp)
+{
+ int opc = ((type == TCG_TYPE_I32) ? INSN_LDL : INSN_LDQ);
+ tcg_out_ldst(s, opc, ra, rb, disp, 1);
+}
+
+static void tcg_out_st( TCGContext *s, \
+ int type, int ra, int rb, tcg_target_long disp)
+{
+ int opc = ((type == TCG_TYPE_I32) ? INSN_STL : INSN_STQ);
+ tcg_out_ldst(s, opc, ra, rb, disp, 0);
+}
+/*
+ * generate arithmatic instruction with immediate. ra is used as both
+ * input and output, and val is used as another input.
+*/
+static inline void tgen_arithi( \
+ TCGContext *s, int opc, int ra, tcg_target_long val)
+{
+ if ( _is_tmp_reg(ra))
+ tcg_abort();
+
+ if (val == (uint8_t)val) {
+ tcg_out_fmt_opi(s, opc, ra, val, ra);
+ } else {
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, val);
+ tcg_out_fmt_opr(s, opc, ra, TMP_REG1, ra);
+ }
+}
+
+static void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
+{
+ if (val != 0)
+ tgen_arithi(s, INSN_ADDQ, reg, val);
+}
+
+static inline void tcg_out_push(TCGContext *s, int reg)
+{
+ tcg_out_fmt_opi(s, INSN_SUBQ, TCG_REG_30, 8, TCG_REG_30);
+ tcg_out_fmt_mem(s, INSN_STQ, reg, TCG_REG_30, 0);
+}
+
+static inline void tcg_out_pop(TCGContext *s, int reg)
+{
+ tcg_out_fmt_mem(s, INSN_LDQ, reg, TCG_REG_30, 0);
+ tcg_out_fmt_opi(s, INSN_ADDQ, TCG_REG_30, 8, TCG_REG_30);
+}
+
+static const uint64_t tcg_cond_to_jcc[10] = {
+ [TCG_COND_EQ] = INSN_CMPEQ,
+ [TCG_COND_NE] = INSN_CMPEQ,
+ [TCG_COND_LT] = INSN_CMPLT,
+ [TCG_COND_GE] = INSN_CMPLT,
+ [TCG_COND_LE] = INSN_CMPLE,
+ [TCG_COND_GT] = INSN_CMPLE,
+ [TCG_COND_LTU] = INSN_CMPULT,
+ [TCG_COND_GEU] = INSN_CMPULT,
+ [TCG_COND_LEU] = INSN_CMPULE,
+ [TCG_COND_GTU] = INSN_CMPULE
+};
+
+static void patch_reloc(uint8_t *x_ptr, int type,
+ tcg_target_long value,
+ tcg_target_long addend)
+{
+ uint32_t *code_ptr = (uint32_t *)x_ptr;
+ uint32_t insn = *code_ptr;
+
+ switch (type) {
+ case R_ALPHA_BRADDR:
+ value -= (long)x_ptr + 4;
+ if ((value & 3) || value < -0x400000 || value >= 0x400000) {
+ tcg_abort();
+ }
+ *code_ptr = insn | INSN_DISP21(value >> 2);
+ break;
+
+ default:
+ tcg_abort();
+ }
+}
+
+static void tcg_out_br(TCGContext *s, int opc, int ra, int label_index)
+{
+ TCGLabel *l = &s->labels[label_index];
+ tcg_target_long value;
+
+ if (l->has_value) {
+ value = l->u.value;
+ value -= (long)s->code_ptr + 4;
+ if ((value & 3) || value < -0x400000 || value >= 0x400000) {
+ tcg_abort();
+ }
+ value >>= 2;
+ } else {
+ tcg_out_reloc(s, s->code_ptr, R_ALPHA_BRADDR, label_index, 0);
+ value = 0;
+ }
+ tcg_out_fmt_br(s, opc, ra, value);
+}
+
+static void tcg_out_brcond(TCGContext *s, int cond, \
+ TCGArg arg1, TCGArg arg2, int const_arg2, int label_index)
+{
+ int opc;
+
+ if ( cond < TCG_COND_EQ || cond > TCG_COND_GTU || const_arg2)
+ tcg_abort();
+
+ opc = tcg_cond_to_jcc[cond];
+ tcg_out_fmt_opr(s, opc, arg1, arg2, TMP_REG1);
+
+ opc = (cond & 1) ? INSN_BLBC : INSN_BLBS;
+ tcg_out_br(s, opc, TMP_REG1, label_index);
+}
+
+#if defined(CONFIG_SOFTMMU)
+
+#include "../../softmmu_defs.h"
+
+static void *qemu_ld_helpers[4] = {
+ __ldb_mmu,
+ __ldw_mmu,
+ __ldl_mmu,
+ __ldq_mmu,
+};
+
+static void *qemu_st_helpers[4] = {
+ __stb_mmu,
+ __stw_mmu,
+ __stl_mmu,
+ __stq_mmu,
+};
+
+#endif
+
+static void tcg_out_mov_addr( TCGContext *s, int ret, int addr)
+{
+ tcg_out_mov(s, ret, addr);
+#if TARGET_LONG_BITS == 32
+ /* if VM is of 32-bit arch, clear higher 32-bit of addr */
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, ret, 0x0f, ret);
+#endif
+}
+
+static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, int opc)
+{
+ int addr_reg, data_reg, r0, r1, mem_index, s_bits;
+ tcg_target_long val;
+
+#if defined(CONFIG_SOFTMMU)
+ uint8_t *label1_ptr, *label2_ptr;
+#endif
+
+ data_reg = *args++;
+ addr_reg = *args++;
+ mem_index = *args;
+ s_bits = opc & 3;
+
+ r0 = TCG_REG_16;
+ r1 = TCG_REG_17;
+
+#if defined(CONFIG_SOFTMMU)
+
+ tcg_out_mov_addr(s, r1, addr_reg);
+ tcg_out_mov_addr(s, r0, addr_reg);
+
+ tgen_arithi(s, INSN_AND, r0, TARGET_PAGE_MASK|((1<<s_bits)-1));
+
+ tgen_arithi(s, INSN_SRL, r1, TARGET_PAGE_BITS-CPU_TLB_ENTRY_BITS);
+ tgen_arithi(s, INSN_AND, r1, (CPU_TLB_SIZE-1)<<CPU_TLB_ENTRY_BITS);
+
+ tgen_arithi(s, INSN_ADDQ, r1, offsetof(CPUState, tlb_table[mem_index][0].addr_read));
+ tcg_out_fmt_opr(s, INSN_ADDQ, r1, TCG_REG_15, r1);
+#if TARGET_LONG_BITS == 32
+ tcg_out_fmt_mem(s, INSN_LDL, TMP_REG1, r1, 0);
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TMP_REG1, 0x0f, TMP_REG1);
+#else
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+#endif
+
+ //
+ // now, r0 contains the page# and TMP_REG1 contains the addr to tlb_entry.addr_read
+ // we below will compare them
+ //
+ tcg_out_fmt_opr(s, INSN_CMPEQ, TMP_REG1, r0, TMP_REG1);
+
+ tcg_out_mov_addr(s, r0, addr_reg);
+
+ //
+ // if equal, we jump to label1. since label1 is not resolved yet,
+ // we just record a relocation.
+ //
+ label1_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ //
+ // here, unequal, TLB-miss.
+ //
+ tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_17, mem_index);
+ tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_27, (tcg_target_long)qemu_ld_helpers[s_bits]);
+ tcg_out_push(s, addr_reg);
+ tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, TCG_REG_27, 0);
+ tcg_out_pop(s, addr_reg);
+
+ //
+ // after helper function call, the result of ld is saved in $0
+ //
+ switch(opc) {
+ case 0 | 4:
+ tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, TCG_REG_0, data_reg);
+ break;
+ case 1 | 4:
+ tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, TCG_REG_0, data_reg);
+ break;
+ case 2 | 4:
+ tcg_out_fmt_opr(s, INSN_ADDL, TCG_REG_0, TCG_REG_31, data_reg);
+ break;
+ case 0:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TCG_REG_0, 0x1, data_reg);
+ break;
+ case 1:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TCG_REG_0, 0x3, data_reg);
+ break;
+ case 2:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TCG_REG_0, 0xf, data_reg);
+ break;
+ case 3:
+ tcg_out_mov(s, data_reg, TCG_REG_0);
+ break;
+ default:
+ tcg_abort();
+ break;
+ }
+
+ //
+ // we have done, jmp to label2. label2 is not resolved yet,
+ // we record a relocation.
+ //
+ label2_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ // patch jmp to label1
+ val = (s->code_ptr - label1_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label1_ptr = (uint32_t) \
+ ( INSN_BNE | ( TMP_REG1 << 21 ) | ( val & 0x1fffff));
+
+ //
+ // if we get here, a TLB entry is hit, r0 contains the guest addr and
+ // r1 contains the ptr that point to tlb_entry.addr_read. what we should
+ // do is to load the tlb_entry.addend (64-bit on alpha) and add it to
+ // r0 to get the host VA
+ //
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, \
+ offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_read));
+ tcg_out_fmt_opr(s, INSN_ADDQ, r1, TMP_REG1, r1);
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+ tcg_out_fmt_opr(s, INSN_ADDQ, r0, TMP_REG1, r0);
+
+#else
+ r0 = addr_reg;
+#endif // endif defined(CONFIG_SOFTMMU)
+
+#ifdef TARGET_WORDS_BIGENDIAN
+ tcg_abort();
+#endif
+
+ //
+ // when we get here, r0 contains the host VA that can be used to access guest PA
+ //
+ switch(opc) {
+ case 0:
+ tcg_out_fmt_mem(s, INSN_LDBU, data_reg, r0, 0);
+ break;
+ case 0 | 4:
+ tcg_out_fmt_mem(s, INSN_LDBU, data_reg, r0, 0);
+ tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, data_reg, data_reg);
+ break;
+ case 1:
+ tcg_out_fmt_mem(s, INSN_LDWU, data_reg, r0, 0);
+ break;
+ case 1 | 4:
+ tcg_out_fmt_mem(s, INSN_LDWU, data_reg, r0, 0);
+ tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, data_reg, data_reg);
+ break;
+ case 2:
+ tcg_out_fmt_mem(s, INSN_LDL, data_reg, r0, 0);
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, data_reg, 0xf, data_reg);
+ break;
+ case 2 | 4:
+ tcg_out_fmt_mem(s, INSN_LDL, data_reg, r0, 0);
+ break;
+ case 3:
+ tcg_out_fmt_mem(s, INSN_LDQ, data_reg, r0, 0);
+ break;
+ default:
+ tcg_abort();
+ }
+
+#if defined(CONFIG_SOFTMMU)
+ /* label2: */
+ val = (s->code_ptr - label2_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label2_ptr = (uint32_t)( INSN_BR \
+ | ( TCG_REG_31 << 21 ) | ( val & 0x1fffff) );
+#endif
+}
+
+static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int opc)
+{
+ int addr_reg, data_reg, r0, r1, mem_index, s_bits;
+ tcg_target_long val;
+
+#if defined(CONFIG_SOFTMMU)
+ uint8_t *label1_ptr, *label2_ptr;
+#endif
+
+ data_reg = *args++;
+ addr_reg = *args++;
+ mem_index = *args;
+ s_bits = opc&3;
+
+ r0 = TCG_REG_16;
+ r1 = TCG_REG_17;
+
+#if defined(CONFIG_SOFTMMU)
+
+ tcg_out_mov_addr(s, r1, addr_reg);
+ tcg_out_mov_addr(s, r0, addr_reg);
+
+ tgen_arithi(s, INSN_AND, r0, TARGET_PAGE_MASK | ((1 << s_bits) - 1));
+
+ tgen_arithi(s, INSN_SRL, r1, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
+ tgen_arithi(s, INSN_AND, r1, (CPU_TLB_SIZE-1) << CPU_TLB_ENTRY_BITS);
+
+ tgen_arithi(s, INSN_ADDQ, r1, offsetof(CPUState, tlb_table[mem_index][0].addr_write));
+ tcg_out_fmt_opr(s, INSN_ADDQ, r1, TCG_REG_15, r1);
+
+#if TARGET_LONG_BITS == 32
+ tcg_out_fmt_mem(s, INSN_LDL, TMP_REG1, r1, 0);
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, TMP_REG1, 0x0f, TMP_REG1);
+#else
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+#endif
+
+ //
+ // now, r0 contains the page# and TMP_REG1 contains the addr to tlb_entry.addr_read
+ // we below will compare them
+ //
+ tcg_out_fmt_opr(s, INSN_CMPEQ, TMP_REG1, r0, TMP_REG1);
+
+ tcg_out_mov_addr(s, r0, addr_reg);
+
+ //
+ // if equal, we jump to label1. since label1 is not resolved yet,
+ // we just record a relocation.
+ //
+ label1_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ // here, unequal, TLB-miss, ...
+ tcg_out_mov(s, TCG_REG_17, data_reg);
+ tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_18, mem_index);
+ tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_27, (tcg_target_long)qemu_st_helpers[s_bits]);
+ tcg_out_push(s, data_reg);
+ tcg_out_push(s, addr_reg);
+ tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, TCG_REG_27, 0);
+ tcg_out_pop(s, addr_reg);
+ tcg_out_pop(s, data_reg);
+
+ //
+ // we have done, jmp to label2. label2 is not resolved yet,
+ // we record a relocation.
+ //
+ label2_ptr = s->code_ptr;
+ s->code_ptr += 4;
+
+ // patch jmp to label1
+ val = (s->code_ptr - label1_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label1_ptr = (uint32_t) \
+ ( INSN_BNE | ( TMP_REG1 << 21 ) | ( val & 0x1fffff));
+
+ //
+ // if we get here, a TLB entry is hit, r0 contains the guest addr and
+ // r1 contains the ptr that point to tlb_entry.addr_read. what we should
+ // do is to load the tlb_entry.addend (64-bit on alpha) and add it to
+ // r0 to get the host VA
+ //
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, \
+ offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_write));
+ tcg_out_fmt_opr(s, INSN_ADDQ, r1, TMP_REG1, r1);
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
+ tcg_out_fmt_opr(s, INSN_ADDQ, r0, TMP_REG1, r0);
+
+#else
+ r0 = addr_reg;
+#endif
+
+#ifdef TARGET_WORDS_BIGENDIAN
+ tcg_abort();
+#endif
+
+ //
+ // when we get here, r0 contains the host VA that can be used to access guest PA
+ //
+ switch(opc) {
+ case 0:
+ tcg_out_fmt_mem(s, INSN_STB, data_reg, r0, 0);
+ break;
+ case 1:
+ tcg_out_fmt_mem(s, INSN_STW, data_reg, r0, 0);
+ break;
+ case 2:
+ tcg_out_fmt_mem(s, INSN_STL, data_reg, r0, 0);
+ break;
+ case 3:
+ tcg_out_fmt_mem(s, INSN_STQ, data_reg, r0, 0);
+ break;
+ default:
+ tcg_abort();
+ }
+
+#if defined(CONFIG_SOFTMMU)
+ /* patch jmp to label2: */
+ val = (s->code_ptr - label2_ptr - 4) >> 2;
+ if ( !(val >= -0x100000 && val < 0x100000)) {
+ tcg_abort();
+ }
+ *(uint32_t *)label2_ptr = (uint32_t)( INSN_BR \
+ | ( TCG_REG_31 << 21 ) | ( val & 0x1fffff));
+#endif
+}
+
+static inline void tcg_out_op(TCGContext *s, \
+ int opc, const TCGArg *args, const int *const_args)
+{
+ int oc;
+ switch(opc)
+ {
+ case INDEX_op_exit_tb:
+ /*
+ * exit_tb t0, where t0 is always constant and should be returned to engine
+ * since we'll back to engine soon, $0 and $1 will never be used
+ */
+ tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_0, args[0]);
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)tb_ret_addr);
+ tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, TMP_REG1, 0);
+ break;
+
+ case INDEX_op_goto_tb:
+ /* goto_tb idx, where idx is constant 0 or 1, indicating the branch # */
+ if (s->tb_jmp_offset) {
+ /* we don't support direct jmp */
+ tcg_abort();
+ } else {
+ tcg_out_movi( s, TCG_TYPE_I64, TMP_REG1, (tcg_target_long)(s->tb_next + args[0]));
+ tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, TMP_REG1, 0);
+ tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, TMP_REG1, 0);
+ }
+ s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;
+ break;
+
+ case INDEX_op_call:
+ if (const_args[0]) {
+ tcg_abort();
+ } else {
+ tcg_out_mov( s, TCG_REG_27, args[0]);
+ tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, args[0], 0);
+ }
+ break;
+
+ case INDEX_op_jmp:
+ if (const_args[0]) {
+ tcg_abort();
+ } else {
+ tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, args[0], 0);
+ }
+ break;
+
+ case INDEX_op_br:
+ tcg_out_br(s, INSN_BR, TCG_REG_31, args[0]);
+ break;
+
+ case INDEX_op_ld8u_i32:
+ case INDEX_op_ld8u_i64:
+ tcg_out_ldst( s, INSN_LDBU, args[0], args[1], args[2], 0);
+ break;
+ case INDEX_op_ld8s_i32:
+ case INDEX_op_ld8s_i64:
+ tcg_out_ldst( s, INSN_LDBU, args[0], args[1], args[2], 1);
+ break;
+ case INDEX_op_ld16u_i32:
+ case INDEX_op_ld16u_i64:
+ tcg_out_ldst( s, INSN_LDWU, args[0], args[1], args[2], 0);
+ break;
+ case INDEX_op_ld16s_i32:
+ case INDEX_op_ld16s_i64:
+ tcg_out_ldst( s, INSN_LDWU, args[0], args[1], args[2], 1);
+ break;
+ case INDEX_op_ld32u_i64:
+ tcg_out_ldst( s, INSN_LDL, args[0], args[1], args[2], 0);
+ break;
+ case INDEX_op_ld_i32:
+ case INDEX_op_ld32s_i64:
+ tcg_out_ldst( s, INSN_LDL, args[0], args[1], args[2], 1);
+ break;
+ case INDEX_op_ld_i64:
+ tcg_out_ldst( s, INSN_LDQ, args[0], args[1], args[2], 0);
+ break;
+ case INDEX_op_st8_i32:
+ case INDEX_op_st8_i64:
+ tcg_out_ldst( s, INSN_STB, args[0], args[1], args[2], 0);
+ break;
+ case INDEX_op_st16_i32:
+ case INDEX_op_st16_i64:
+ tcg_out_ldst( s, INSN_STW, args[0], args[1], args[2], 0);
+ break;
+ case INDEX_op_st_i32:
+ case INDEX_op_st32_i64:
+ tcg_out_ldst( s, INSN_STL, args[0], args[1], args[2], 0);
+ break;
+ case INDEX_op_st_i64:
+ tcg_out_ldst( s, INSN_STQ, args[0], args[1], args[2], 0);
+ break;
+
+ case INDEX_op_add_i32:
+ case INDEX_op_add_i64:
+ oc = INSN_ADDQ;
+ goto gen_arith;
+ case INDEX_op_sub_i32:
+ case INDEX_op_sub_i64:
+ oc = INSN_SUBQ;
+ goto gen_arith;
+ case INDEX_op_mul_i32:
+ oc = INSN_MULL;
+ goto gen_arith;
+ case INDEX_op_mul_i64:
+ oc = INSN_MULQ;
+ goto gen_arith;
+ case INDEX_op_and_i32:
+ case INDEX_op_and_i64:
+ oc = INSN_AND;
+ goto gen_arith;
+ case INDEX_op_or_i32:
+ case INDEX_op_or_i64:
+ oc = INSN_BIS;
+ goto gen_arith;
+ case INDEX_op_xor_i32:
+ case INDEX_op_xor_i64:
+ oc = INSN_XOR;
+ goto gen_arith;
+ case INDEX_op_shl_i32:
+ case INDEX_op_shl_i64:
+ oc = INSN_SLL;
+ goto gen_arith;
+ case INDEX_op_shr_i32:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, args[1], 0x0f, args[1]);
+ case INDEX_op_shr_i64:
+ oc = INSN_SRL;
+ goto gen_arith;
+ case INDEX_op_sar_i32:
+ tcg_out_fmt_opr(s, INSN_ADDL, args[1], TCG_REG_31, args[1]);
+ case INDEX_op_sar_i64:
+ oc = INSN_SRA;
+ gen_arith:
+ if (const_args[2]) {
+ tcg_abort();
+ } else {
+ tcg_out_fmt_opr(s, oc, args[1], args[2], args[0]);
+ }
+ break;
+
+ case INDEX_op_brcond_i32:
+ tcg_out_fmt_opr(s, INSN_ADDL, args[0], TCG_REG_31, args[0]);
+ tcg_out_fmt_opr(s, INSN_ADDL, args[1], TCG_REG_31, args[1]);
+ case INDEX_op_brcond_i64:
+ tcg_out_brcond(s, args[2], args[0], args[1], const_args[1], args[3]);
+ break;
+
+ case INDEX_op_ext8s_i32:
+ case INDEX_op_ext8s_i64:
+ tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, args[1], args[0]);
+ break;
+ case INDEX_op_ext16s_i32:
+ case INDEX_op_ext16s_i64:
+ tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, args[1], args[0]);
+ break;
+ case INDEX_op_ext32s_i64:
+ tcg_out_fmt_opr(s, INSN_ADDL, args[1], TCG_REG_31, args[0]);
+ break;
+
+ case INDEX_op_qemu_ld8u:
+ tcg_out_qemu_ld(s, args, 0);
+ break;
+ case INDEX_op_qemu_ld8s:
+ tcg_out_qemu_ld(s, args, 0 | 4);
+ break;
+ case INDEX_op_qemu_ld16u:
+ tcg_out_qemu_ld(s, args, 1);
+ break;
+ case INDEX_op_qemu_ld16s:
+ tcg_out_qemu_ld(s, args, 1 | 4);
+ break;
+ case INDEX_op_qemu_ld32u:
+ tcg_out_qemu_ld(s, args, 2);
+ break;
+ case INDEX_op_qemu_ld32s:
+ tcg_out_qemu_ld(s, args, 2 | 4);
+ break;
+ case INDEX_op_qemu_ld64:
+ tcg_out_qemu_ld(s, args, 3);
+ break;
+
+ case INDEX_op_qemu_st8:
+ tcg_out_qemu_st(s, args, 0);
+ break;
+ case INDEX_op_qemu_st16:
+ tcg_out_qemu_st(s, args, 1);
+ break;
+ case INDEX_op_qemu_st32:
+ tcg_out_qemu_st(s, args, 2);
+ break;
+ case INDEX_op_qemu_st64:
+ tcg_out_qemu_st(s, args, 3);
+ break;
+
+ case INDEX_op_movi_i32:
+ case INDEX_op_movi_i64:
+ case INDEX_op_mov_i32:
+ case INDEX_op_mov_i64:
+ case INDEX_op_div2_i32:
+ case INDEX_op_divu2_i32:
+ default:
+ tcg_abort();
+ }
+}
+
+static const TCGTargetOpDef alpha_op_defs[] = {
+ { INDEX_op_exit_tb, { } },
+ { INDEX_op_goto_tb, { } },
+ { INDEX_op_call, { "r" } },
+ { INDEX_op_jmp, { "r" } },
+ { INDEX_op_br, { } },
+
+ { INDEX_op_mov_i32, { "r", "r" } },
+ { INDEX_op_movi_i32, { "r" } },
+ { INDEX_op_ld8u_i32, { "r", "r" } },
+ { INDEX_op_ld8s_i32, { "r", "r" } },
+ { INDEX_op_ld16u_i32, { "r", "r" } },
+ { INDEX_op_ld16s_i32, { "r", "r" } },
+ { INDEX_op_ld_i32, { "r", "r" } },
+ { INDEX_op_st8_i32, { "r", "r" } },
+ { INDEX_op_st16_i32, { "r", "r" } },
+ { INDEX_op_st_i32, { "r", "r" } },
+
+ { INDEX_op_add_i32, { "r", "0", "r" } },
+ { INDEX_op_mul_i32, { "r", "0", "r" } },
+ { INDEX_op_sub_i32, { "r", "0", "r" } },
+ { INDEX_op_and_i32, { "r", "0", "r" } },
+ { INDEX_op_or_i32, { "r", "0", "r" } },
+ { INDEX_op_xor_i32, { "r", "0", "r" } },
+
+ { INDEX_op_shl_i32, { "r", "0", "r" } },
+ { INDEX_op_shr_i32, { "r", "0", "r" } },
+ { INDEX_op_sar_i32, { "r", "0", "r" } },
+
+ { INDEX_op_brcond_i32, { "r", "r" } },
+
+ { INDEX_op_mov_i64, { "r", "r" } },
+ { INDEX_op_movi_i64, { "r" } },
+ { INDEX_op_ld8u_i64, { "r", "r" } },
+ { INDEX_op_ld8s_i64, { "r", "r" } },
+ { INDEX_op_ld16u_i64, { "r", "r" } },
+ { INDEX_op_ld16s_i64, { "r", "r" } },
+ { INDEX_op_ld32u_i64, { "r", "r" } },
+ { INDEX_op_ld32s_i64, { "r", "r" } },
+ { INDEX_op_ld_i64, { "r", "r" } },
+ { INDEX_op_st8_i64, { "r", "r" } },
+ { INDEX_op_st16_i64, { "r", "r" } },
+ { INDEX_op_st32_i64, { "r", "r" } },
+ { INDEX_op_st_i64, { "r", "r" } },
+
+ { INDEX_op_add_i64, { "r", "0", "r" } },
+ { INDEX_op_mul_i64, { "r", "0", "r" } },
+ { INDEX_op_sub_i64, { "r", "0", "r" } },
+ { INDEX_op_and_i64, { "r", "0", "r" } },
+ { INDEX_op_or_i64, { "r", "0", "r" } },
+ { INDEX_op_xor_i64, { "r", "0", "r" } },
+
+ { INDEX_op_shl_i64, { "r", "0", "r" } },
+ { INDEX_op_shr_i64, { "r", "0", "r" } },
+ { INDEX_op_sar_i64, { "r", "0", "r" } },
+
+ { INDEX_op_brcond_i64, { "r", "r" } },
+
+ { INDEX_op_ext8s_i32, { "r", "r"} },
+ { INDEX_op_ext16s_i32, { "r", "r"} },
+ { INDEX_op_ext8s_i64, { "r", "r"} },
+ { INDEX_op_ext16s_i64, { "r", "r"} },
+ { INDEX_op_ext32s_i64, { "r", "r"} },
+
+ { INDEX_op_qemu_ld8u, { "r", "L" } },
+ { INDEX_op_qemu_ld8s, { "r", "L" } },
+ { INDEX_op_qemu_ld16u, { "r", "L" } },
+ { INDEX_op_qemu_ld16s, { "r", "L" } },
+ { INDEX_op_qemu_ld32u, { "r", "L" } },
+ { INDEX_op_qemu_ld32s, { "r", "L" } },
+ { INDEX_op_qemu_ld64, { "r", "L" } },
+
+ { INDEX_op_qemu_st8, { "L", "L" } },
+ { INDEX_op_qemu_st16, { "L", "L" } },
+ { INDEX_op_qemu_st32, { "L", "L" } },
+ { INDEX_op_qemu_st64, { "L", "L"} },
+ { -1 },
+};
+
+
+static int tcg_target_callee_save_regs[] = {
+ TCG_REG_15, // used for the global env, so no need to save
+ TCG_REG_9,
+ TCG_REG_10,
+ TCG_REG_11,
+ TCG_REG_12,
+ TCG_REG_13,
+ TCG_REG_14
+};
+
+/*
+ * Generate global QEMU prologue and epilogue code
+*/
+void tcg_target_qemu_prologue(TCGContext *s)
+{
+ int i, frame_size, push_size, stack_addend;
+
+ /* TB prologue */
+
+ /* save TCG_REG_26 */
+ tcg_out_push(s, TCG_REG_26);
+ tcg_out_push(s, TCG_REG_27);
+ tcg_out_push(s, TCG_REG_28);
+ tcg_out_push(s, TCG_REG_29);
+
+ /* save all callee saved registers */
+ for(i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
+ tcg_out_push(s, tcg_target_callee_save_regs[i]);
+ }
+
+ /* reserve some stack space */
+ push_size = 8 + (4 + ARRAY_SIZE(tcg_target_callee_save_regs)) * 8;
+ frame_size = push_size + TCG_STATIC_CALL_ARGS_SIZE;
+ frame_size = (frame_size + TCG_TARGET_STACK_ALIGN - 1) & ~(TCG_TARGET_STACK_ALIGN - 1);
+ stack_addend = frame_size - push_size;
+ tgen_arithi(s, INSN_ADDQ, TCG_REG_30, -stack_addend);
+
+ tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, TCG_REG_16, 0); /* jmp $16 */
+
+ /* TB epilogue */
+ tb_ret_addr = s->code_ptr;
+ tgen_arithi(s, INSN_ADDQ, TCG_REG_30, stack_addend);
+ for(i = ARRAY_SIZE(tcg_target_callee_save_regs) - 1; i >= 0; i--) {
+ tcg_out_pop(s, tcg_target_callee_save_regs[i]);
+ }
+
+ tcg_out_pop(s, TCG_REG_29);
+ tcg_out_pop(s, TCG_REG_28);
+ tcg_out_pop(s, TCG_REG_27);
+ tcg_out_pop(s, TCG_REG_26);
+ tcg_out_fmt_jmp(s, INSN_RET, TCG_REG_31, TCG_REG_26, 0); /* ret */
+}
+
+
+void tcg_target_init(TCGContext *s)
+{
+ /* fail safe */
+ if ((1 << CPU_TLB_ENTRY_BITS) != sizeof(CPUTLBEntry))
+ tcg_abort();
+
+ tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffffffff);
+ tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffffffff);
+ tcg_regset_set32(tcg_target_call_clobber_regs, 0,
+ (1 << TCG_REG_1 ) | (1 << TCG_REG_2 ) | (1 << TCG_REG_3 ) | (1 << TCG_REG_4 ) |
+ (1 << TCG_REG_5 ) | (1 << TCG_REG_6 ) | (1 << TCG_REG_7 ) | (1 << TCG_REG_8 ) |
+ (1 << TCG_REG_22) | (1 << TCG_REG_23) | (1 << TCG_REG_24) | (1 << TCG_REG_25) |
+ (1 << TCG_REG_16) | (1 << TCG_REG_17) | (1 << TCG_REG_18) | (1 << TCG_REG_19) |
+ (1 << TCG_REG_20) | (1 << TCG_REG_21) | (1 << TCG_REG_0 ));
+
+ //tcg_regset_set32( tcg_target_call_clobber_regs, 0, 0xffffffff);
+
+ tcg_regset_clear(s->reserved_regs);
+ // $26~$31 not allocated by tcg.c
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_26);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_27);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_28);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_29);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_30);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_31);
+
+ tcg_add_target_add_op_defs(alpha_op_defs);
+}
+
diff --git a/tcg/alpha/tcg-target.h b/tcg/alpha/tcg-target.h
new file mode 100644
index 0000000..e5083a5
--- /dev/null
+++ b/tcg/alpha/tcg-target.h
@@ -0,0 +1,68 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#define TCG_TARGET_ALPHA 1
+
+#define TCG_TARGET_REG_BITS 64
+
+#define TCG_TARGET_NB_REGS 32
+
+enum {
+ TCG_REG_0 = 0, TCG_REG_1, TCG_REG_2, TCG_REG_3,
+ TCG_REG_4, TCG_REG_5, TCG_REG_6, TCG_REG_7,
+ TCG_REG_8, TCG_REG_9, TCG_REG_10, TCG_REG_11,
+ TCG_REG_12, TCG_REG_13, TCG_REG_14, TCG_REG_15,
+ TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19,
+ TCG_REG_20, TCG_REG_21, TCG_REG_22, TCG_REG_23,
+ TCG_REG_24, TCG_REG_25, TCG_REG_26, TCG_REG_27,
+ TCG_REG_28, TCG_REG_29, TCG_REG_30, TCG_REG_31
+};
+
+/* used for function call generation */
+#define TCG_REG_CALL_STACK TCG_REG_30
+#define TCG_TARGET_STACK_ALIGN 16
+#define TCG_TARGET_CALL_STACK_OFFSET 0
+
+/* we have signed extension instructions */
+#define TCG_TARGET_HAS_ext8s_i32
+#define TCG_TARGET_HAS_ext16s_i32
+#define TCG_TARGET_HAS_ext8s_i64
+#define TCG_TARGET_HAS_ext16s_i64
+#define TCG_TARGET_HAS_ext32s_i64
+
+/* Note: must be synced with dyngen-exec.h */
+#define TCG_AREG0 TCG_REG_15
+#define TCG_AREG1 TCG_REG_9
+#define TCG_AREG2 TCG_REG_10
+#define TCG_AREG3 TCG_REG_11
+#define TCG_AREG4 TCG_REG_12
+#define TCG_AREG5 TCG_REG_13
+#define TCG_AREG6 TCG_REG_14
+
+#define TMP_REG1 TCG_REG_28
+
+static inline void flush_icache_range(unsigned long start, unsigned long stop)
+{
+ __asm__ __volatile__ ("call_pal 0x86");
+}
+
--
1.6.3.3
^ permalink raw reply related [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-22 15:47 identifier scorpio
@ 2010-01-22 18:00 ` Richard Henderson
2010-01-26 1:19 ` Richard Henderson
1 sibling, 0 replies; 21+ messages in thread
From: Richard Henderson @ 2010-01-22 18:00 UTC (permalink / raw)
To: identifier scorpio; +Cc: qemu-devel
On 01/22/2010 07:47 AM, identifier scorpio wrote:
> Is there any good method to find the bug except "guess and try"?
-singlestep -d in_asm,cpu,exec
Use these options on both Alpha host and x86_64 host and diff the
resulting output files. That will show you which target instruction is
emulated differently.
> And it seems that few people is interested in porting QEMU/TCG to
> alpha platform, why? just because alpha machine is disappearing?
Probably. I no longer have functioning alpha hardware, which is why
I've become interested in qemu with alpha as a target.
> + tcg_out32(s, (opc)|INSN_RA(ra)|INSN_DISP21(disp));
Coding style: spaces around operators, no useless parens around opc.
> +static inline int tcg_target_const_match( \
> + tcg_target_long val, const TCGArgConstraint *arg_ct)
Coding style: no trailing \; there's no need for line continuation
anywhere except in preprocessor directives. Merge the first argument
into the first line, assuming that can happen without exceeding 80
columns. Arguments that do get split to subsequent lines should be
properly indented below the first argument on the previous line.
> + if ( type == TCG_TYPE_I32)
> + val = (int32_t)val;
Coding style: use braces, even for a single statement. Yes, there's
plenty of code in the project that doesn't, but the coding style is
being enforced on all new code.
Also, extra space after open paren.
> + if (disp != (int16_t)disp) {
> + tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, disp);
> + tcg_out_fmt_opr(s, INSN_ADDQ, rb, TMP_REG1, TMP_REG1);
> + tcg_out_fmt_mem(s, opc, ra, TMP_REG1, 0);
> + } else {
> + tcg_out_fmt_mem(s, opc, ra, rb, disp);
> + }
The reason I suggested writing the tcg_out_opc_long as I did was so that
for a 32-bit displacement like 0x12345678 instead of
ldah $28,0x1234($31)
lda $28,0x5678($28)
addq $16,$28,$28
ldq $17,0($28)
we can generate
ldah $28,0x1234($16)
ldq $17,0x5678($28)
For larger 64-bit constants obviously we have no choice but to use an
ADDQ, but even then one can stuff the final 16-bit addition into the
memory insn itself.
Given the size of the CPUState, offsets > 32k are very common, so it
would be good to handle this case well.
> +static void tcg_out_mov_addr( TCGContext *s, int ret, int addr)
> +{
> + tcg_out_mov(s, ret, addr);
> +#if TARGET_LONG_BITS == 32
> + /* if VM is of 32-bit arch, clear higher 32-bit of addr */
> + tcg_out_fmt_opi(s, INSN_ZAPNOT, ret, 0x0f, ret);
> +#endif
> +}
It's a bit wasteful to emit the move *and* the zap; give "addr" to the
first operand of the zapnot directly.
> + tgen_arithi(s, INSN_ADDQ, r1, offsetof(CPUState, tlb_table[mem_index][0].addr_read));
> + tcg_out_fmt_opr(s, INSN_ADDQ, r1, TCG_REG_15, r1);
> +#if TARGET_LONG_BITS == 32
> + tcg_out_fmt_mem(s, INSN_LDL, TMP_REG1, r1, 0);
> + tcg_out_fmt_opi(s, INSN_ZAPNOT, TMP_REG1, 0x0f, TMP_REG1);
> +#else
> + tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
> +#endif
Better as
tcg_out_fmt_opr(s, INSN_ADDQ, r1, TCG_REG_15, r1);
tcg_out_ldst(s, TARGET_LONG_BITS == 32 ? INSN_LDL : INSN_LDQ,
TMP_REG1, r1, offsetof(CPUState, ...), 0);
to fold part of the offset into the memory displacement, and reuse your
existing code emitting the zapnot.
You might also consider copying the ppc64 port and split out a
tcg_out_tlb_read function from both qemu_ld and qemu_st.
> + *(uint32_t *)label1_ptr = (uint32_t) \
> + ( INSN_BNE | ( TMP_REG1 << 21 ) | ( val & 0x1fffff));
If you're not going to use the gen_new_label method, at least use your
INSN_RA and INSN_DISP21 macros.
> + tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, \
> + offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_read));
> + tcg_out_fmt_opr(s, INSN_ADDQ, r1, TMP_REG1, r1);
> + tcg_out_fmt_mem(s, INSN_LDQ, TMP_REG1, r1, 0);
As above, better to use tcg_out_ldst.
> + { INDEX_op_add_i32, { "r", "0", "r" } },
All of these matching constraints are wrong -- alpha is a 3 address
machine; should be { "r", "r", "r" }, at least until you support
constant arguments properly.
I still haven't seen anything that looks actively wrong to explain why
windows isn't working for you...
r~
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-22 15:47 identifier scorpio
2010-01-22 18:00 ` Richard Henderson
@ 2010-01-26 1:19 ` Richard Henderson
2010-01-29 1:55 ` identifier scorpio
` (2 more replies)
1 sibling, 3 replies; 21+ messages in thread
From: Richard Henderson @ 2010-01-26 1:19 UTC (permalink / raw)
To: identifier scorpio; +Cc: qemu-devel
[-- Attachment #1: Type: text/plain, Size: 407 bytes --]
I've rearranged the code a tad, along the lines I had in mind.
I *think* I may have found cause of some of your problems running
Windows. Mainly, tcg_target_long was used places that could be holding
HOST values, which means that the host values would have been truncated
to 32 bits.
Anyway, give this a try and let me know what happens. All I could
actually try was a cross-compile of the code...
r~
[-- Attachment #2: d-tcg-alpha.txt --]
[-- Type: text/plain, Size: 47551 bytes --]
diff --git a/cpu-common.h b/cpu-common.h
index 6302372..01f9980 100644
--- a/cpu-common.h
+++ b/cpu-common.h
@@ -3,7 +3,8 @@
/* CPU interfaces that are target indpendent. */
-#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__)
+#if defined(__arm__) || defined(__sparc__) || defined(__mips__) \
+ || defined(__hppa__) || defined(__alpha__)
#define WORDS_ALIGNED
#endif
diff --git a/exec-all.h b/exec-all.h
index 820b59e..3e03aef 100644
--- a/exec-all.h
+++ b/exec-all.h
@@ -114,7 +114,8 @@ static inline int tlb_set_page(CPUState *env1, target_ulong vaddr,
#define CODE_GEN_AVG_BLOCK_SIZE 64
#endif
-#if defined(_ARCH_PPC) || defined(__x86_64__) || defined(__arm__) || defined(__i386__)
+#if defined(_ARCH_PPC) || defined(__x86_64__) || defined(__arm__) \
+ || defined(__i386__) || defined(__alpha__)
#define USE_DIRECT_JUMP
#endif
@@ -189,6 +190,9 @@ extern int code_gen_max_blocks;
#if defined(_ARCH_PPC)
extern void ppc_tb_set_jmp_target(unsigned long jmp_addr, unsigned long addr);
#define tb_set_jmp_target1 ppc_tb_set_jmp_target
+#elif defined(__alpha__)
+extern void alpha_tb_set_jmp_target(unsigned long, unsigned long)
+#define tb_set_jmp_target1 alpha_tb_set_jmp_target
#elif defined(__i386__) || defined(__x86_64__)
static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
{
diff --git a/tcg/alpha/tcg-target.c b/tcg/alpha/tcg-target.c
new file mode 100644
index 0000000..7e0e367
--- /dev/null
+++ b/tcg/alpha/tcg-target.c
@@ -0,0 +1,1398 @@
+/*
+ * Tiny Code Generator for QEMU on ALPHA platform.
+ */
+
+#ifndef NDEBUG
+static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
+ "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
+ "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
+ "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
+ "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31",
+};
+#endif
+
+/*
+ * $15 is the cpu_env register,
+ * $30 is the stack pointer,
+ * $31 is the zero register,
+ * $23, $28, $29 are reserved as temporaries.
+ */
+static const int tcg_target_reg_alloc_order[] = {
+ TCG_REG_9, TCG_REG_10, TCG_REG_11, TCG_REG_12, TCG_REG_13, TCG_REG_14,
+ TCG_REG_1, TCG_REG_2, TCG_REG_3, TCG_REG_4, TCG_REG_5, TCG_REG_6,
+ TCG_REG_7, TCG_REG_8, TCG_REG_22, TCG_REG_24, TCG_REG_25, TCG_REG_26,
+ TCG_REG_27, TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19, TCG_REG_20,
+ TCG_REG_21
+};
+
+/*
+ * According to alpha calling convention, these 6 registers are used for
+ * function parameter passing. if function has more than 6 parameters,
+ * remaining arguments are stored on the stack.
+ */
+static const int tcg_target_call_iarg_regs[6] = {
+ TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19, TCG_REG_20, TCG_REG_21
+};
+
+/*
+ * According to alpha calling convention, $0 is used for returning function
+ * result.
+ */
+static const int tcg_target_call_oarg_regs[1] = { TCG_REG_0 };
+
+/*
+ * Save the address of TB's epilogue.
+ */
+#define TB_RET_OFS TCG_STATIC_CALL_ARGS_SIZE
+
+#define INSN_OP(x) (((x) & 0x3f) << 26)
+#define INSN_FUNC1(x) (((x) & 0x3) << 14)
+#define INSN_FUNC2(x) (((x) & 0x7f) << 5)
+#define INSN_RA(x) (((x) & 0x1f) << 21)
+#define INSN_RB(x) (((x) & 0x1f) << 16)
+#define INSN_RC(x) ((x) & 0x1f)
+#define INSN_LIT(x) (((x) & 0xff) << 13)
+#define INSN_DISP16(x) ((x) & 0xffff)
+#define INSN_DISP21(x) ((x) & 0x1fffff)
+#define INSN_RSVED(x) ((x) & 0x3fff)
+
+#define INSN_ADDL (INSN_OP(0x10) | INSN_FUNC2(0x00))
+#define INSN_ADDQ (INSN_OP(0x10) | INSN_FUNC2(0x20))
+#define INSN_AND (INSN_OP(0x11) | INSN_FUNC2(0x00))
+#define INSN_BEQ INSN_OP(0x39)
+#define INSN_BGE INSN_OP(0x3e)
+#define INSN_BGT INSN_OP(0x3f)
+#define INSN_BIC (INSN_OP(0x11) | INSN_FUNC2(0x08))
+#define INSN_BIS (INSN_OP(0x11) | INSN_FUNC2(0x20))
+#define INSN_BLE INSN_OP(0x3b)
+#define INSN_BLT INSN_OP(0x3a)
+#define INSN_BNE INSN_OP(0x3d)
+#define INSN_BR INSN_OP(0x30)
+#define INSN_CALL (INSN_OP(0x1a) | INSN_FUNC1(1))
+#define INSN_CMPEQ (INSN_OP(0x10) | INSN_FUNC2(0x2d))
+#define INSN_CMPLE (INSN_OP(0x10) | INSN_FUNC2(0x6d))
+#define INSN_CMPLT (INSN_OP(0x10) | INSN_FUNC2(0x4d))
+#define INSN_CMPULE (INSN_OP(0x10) | INSN_FUNC2(0x3d))
+#define INSN_CMPULT (INSN_OP(0x10) | INSN_FUNC2(0x1d))
+#define INSN_EQV (INSN_OP(0x11) | INSN_FUNC2(0x48))
+#define INSN_EXTBL (INSN_OP(0x12) | INSN_FUNC2(0x06))
+#define INSN_EXTWH (INSN_OP(0x12) | INSN_FUNC2(0x16))
+#define INSN_INSLH (INSN_OP(0x12) | INSN_FUNC2(0x67))
+#define INSN_INSWL (INSN_OP(0x12) | INSN_FUNC2(0x57))
+#define INSN_JMP (INSN_OP(0x1a) | INSN_FUNC1(0))
+#define INSN_LDA INSN_OP(0x8)
+#define INSN_LDAH INSN_OP(0x9)
+#define INSN_LDBU INSN_OP(0xa)
+#define INSN_LDL INSN_OP(0x28)
+#define INSN_LDQ INSN_OP(0x29)
+#define INSN_LDWU INSN_OP(0xc)
+#define INSN_MULL (INSN_OP(0x13) | INSN_FUNC2(0x00))
+#define INSN_MULQ (INSN_OP(0x13) | INSN_FUNC2(0x20))
+#define INSN_ORNOT (INSN_OP(0x11) | INSN_FUNC2(0x28))
+#define INSN_RET (INSN_OP(0x1a) | INSN_FUNC1(2))
+#define INSN_SEXTB (INSN_OP(0x1c) | INSN_FUNC2(0x00))
+#define INSN_SEXTW (INSN_OP(0x1c) | INSN_FUNC2(0x1))
+#define INSN_SLL (INSN_OP(0x12) | INSN_FUNC2(0x39))
+#define INSN_SRA (INSN_OP(0x12) | INSN_FUNC2(0x3c))
+#define INSN_SRL (INSN_OP(0x12) | INSN_FUNC2(0x34))
+#define INSN_STB INSN_OP(0xe)
+#define INSN_STL INSN_OP(0x2c)
+#define INSN_STQ INSN_OP(0x2d)
+#define INSN_STW INSN_OP(0xd)
+#define INSN_SUBL (INSN_OP(0x10) | INSN_FUNC2(0x09))
+#define INSN_SUBQ (INSN_OP(0x10) | INSN_FUNC2(0x29))
+#define INSN_XOR (INSN_OP(0x11) | INSN_FUNC2(0x40))
+#define INSN_ZAPNOT (INSN_OP(0x12) | INSN_FUNC2(0x31))
+#define INSN_BUGCHK (INSN_OP(0x00) | INSN_DISP16(0x81))
+
+/*
+ * Return the # of regs used for parameter passing on procedure calling.
+ * note that alpha use $16~$21 to transfer the first 6 paramenters of a
+ * procedure.
+ */
+static inline int tcg_target_get_call_iarg_regs_count(int flags)
+{
+ return 6;
+}
+
+/*
+ * Given a constraint, fill in the available register set or constant range.
+ */
+static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
+{
+ const char *ct_str = *pct_str;
+
+ switch (ct_str[0]) {
+ case 'r':
+ /* Constaint 'r' means any register is okay. */
+ ct->ct |= TCG_CT_REG;
+ tcg_regset_set32(ct->u.regs, 0, 0xffffffffu);
+ break;
+
+ case 'a':
+ /* Constraint 'a' means $24, one of the division inputs. */
+ ct->ct |= TCG_CT_REG;
+ tcg_regset_set32(ct->u.regs, 0, 1u << 24);
+ break;
+
+ case 'b':
+ /* Constraint 'b' means $25, one of the division inputs. */
+ ct->ct |= TCG_CT_REG;
+ tcg_regset_set32(ct->u.regs, 0, 1u << 25);
+ break;
+
+ case 'c':
+ /* Constraint 'c' means $27, the call procedure vector. */
+ ct->ct |= TCG_CT_REG;
+ tcg_regset_set32(ct->u.regs, 0, 1u << 27);
+ break;
+
+ case 'L':
+ /* Constraint for qemu_ld/st. The extra reserved registers are
+ used for passing the parameters to the helper function. */
+ ct->ct |= TCG_CT_REG;
+ tcg_regset_set32(ct->u.regs, 0, 0xffffffffu);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_16);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_17);
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_18);
+ break;
+
+ case 'I':
+ /* Constraint 'I' means an immediate 0 ... 255. */
+ ct->ct |= TCG_CT_CONST_U8;
+ break;
+
+ case 'J':
+ /* Constraint 'J' means the immediate 0. */
+ ct->ct |= TCG_CT_CONST_ZERO;
+ break;
+
+ default:
+ return -1;
+ }
+
+ ct_str++;
+ *pct_str = ct_str;
+ return 0;
+}
+
+static inline int tcg_target_const_match(tcg_target_long val,
+ const TCGArgConstraint *arg_ct)
+{
+ int ct = arg_ct->ct;
+ if (ct & TCG_CT_CONST) {
+ return 1;
+ } else if (ct & TCG_CT_CONST_U8) {
+ return val == (uint8_t)val;
+ } else if (ct & TCG_CT_CONST_ZERO) {
+ return val == 0;
+ } else {
+ return 0;
+ }
+}
+
+static inline void tcg_out_fmt_br(TCGContext *s, int opc, int ra, int disp)
+{
+ tcg_out32(s, (opc) | INSN_RA(ra) | INSN_DISP21(disp));
+}
+
+static inline void tcg_out_fmt_mem(TCGContext *s, int opc, int ra,
+ int rb, int disp)
+{
+ if (disp != (int16_t)disp) {
+ tcg_abort();
+ }
+ tcg_out32(s, (opc) | INSN_RA(ra) | INSN_RB(rb) | INSN_DISP16(disp));
+}
+
+static inline void tcg_out_fmt_jmp(TCGContext *s, int opc, int ra,
+ int rb, int rsved)
+{
+ tcg_out32(s, (opc) | INSN_RA(ra) | INSN_RB(rb) | INSN_RSVED(rsved));
+}
+
+static inline void tcg_out_fmt_opr(TCGContext *s, int opc, int ra,
+ int rb, int rc)
+{
+ tcg_out32(s, (opc) | INSN_RA(ra) | INSN_RB(rb) | INSN_RC(rc));
+}
+
+static inline void tcg_out_fmt_opi(TCGContext *s, int opc, int ra,
+ int lit, int rc)
+{
+ if (lit & ~0xff) {
+ tcg_abort();
+ }
+ tcg_out32(s, (opc) | INSN_RA(ra) | INSN_LIT(lit) | INSN_RC(rc) | (1<<12));
+}
+
+/*
+ * mov from a reg to another
+ */
+static inline void tcg_out_mov(TCGContext *s, int rc, int rb)
+{
+ if (rb != rc) {
+ tcg_out_fmt_opr(s, INSN_BIS, TCG_REG_31, rb, rc);
+ }
+}
+
+/*
+ * Helper function to emit a memory format operation with a displacement
+ * that may be larger than the 16 bits accepted by the real instruction.
+ */
+static void tcg_out_mem_long(TCGContext *s, int opc, int ra, int rb, long orig)
+{
+ long l0, l1, extra = 0, val = orig;
+ int rs;
+
+ /* Pick a scratch register. Use the output register, if possible. */
+ switch (opc) {
+ default:
+ if (ra != rb) {
+ rs = ra;
+ break;
+ }
+ /* FALLTHRU */
+
+ case INSN_STB:
+ case INSN_STW:
+ case INSN_STL:
+ case INSN_STQ:
+ if (ra == TMP_REG1) {
+ tcg_abort();
+ }
+ rs = TMP_REG1;
+ break;
+ }
+
+ l0 = (int16_t)val;
+ val = (val - l0) >> 16;
+ l1 = (int16_t)val;
+
+ if (orig >> 31 == -1 || orig >> 31 == 0) {
+ if (l1 < 0 && orig >= 0) {
+ extra = 0x4000;
+ l1 = (int16_t)(val - 0x4000);
+ }
+ } else {
+ long l2, l3;
+ int rh = TCG_REG_31;
+
+ val = (val - l1) >> 16;
+ l2 = (int16_t)val;
+ val = (val - l2) >> 16;
+ l3 = (int16_t)val;
+
+ if (l3) {
+ tcg_out_fmt_mem(s, INSN_LDAH, rs, rh, l3);
+ rh = rs;
+ }
+ if (l2) {
+ tcg_out_fmt_mem(s, INSN_LDA, rs, rh, l2);
+ rh = rs;
+ }
+ tcg_out_fmt_opi(s, INSN_SLL, rh, 32, rs);
+
+ if (rb != TCG_REG_31) {
+ tcg_out_fmt_opr(s, INSN_ADDQ, rs, rb, rs);
+ }
+ rb = rs;
+ }
+
+ if (l1) {
+ tcg_out_fmt_mem(s, INSN_LDAH, rs, rb, l1);
+ rb = rs;
+ }
+ if (extra) {
+ tcg_out_fmt_mem(s, INSN_LDAH, rs, rb, extra);
+ rb = rs;
+ }
+
+ if (opc != INSN_LDA || rb != ra || l0 != 0) {
+ tcg_out_fmt_mem(s, opc, ra, rb, l0);
+ }
+}
+
+static inline void tcg_out_movi(TCGContext *s, TCGType type, int ra, long val)
+{
+ if (type == TCG_TYPE_I32) {
+ val = (int32_t)val;
+ }
+ tcg_out_mem_long(s, INSN_LDA, ra, TCG_REG_31, val);
+}
+
+static inline void tcg_out_ld(TCGContext *s, int type,
+ int ra, int rb, long disp)
+{
+ tcg_out_mem_long(s, type == TCG_TYPE_I32 ? INSN_LDL : INSN_LDQ,
+ ra, rb, disp);
+}
+
+static inline void tcg_out_st(TCGContext *s, int type,
+ int ra, int rb, long disp)
+{
+ tcg_out_mem_long(s, type == TCG_TYPE_I32 ? INSN_STL : INSN_STQ,
+ ra, rb, disp);
+}
+
+static inline void tcg_out_addi(TCGContext *s, int reg, long val)
+{
+ if (val != 0) {
+ tcg_out_mem_long(s, INSN_LDA, reg, reg, val);
+ }
+}
+
+static void tcg_out_andi(TCGContext *s, int ra, long val, int rc)
+{
+ if (val == (uint8_t)val) {
+ tcg_out_fmt_opi(s, INSN_AND, ra, val, rc);
+ } else if (~val == (uint8_t)~val) {
+ tcg_out_fmt_opi(s, INSN_BIC, ra, ~val, rc);
+ } else {
+ long mask0, maskff;
+
+ /* Check and see if the value matches a ZAPNOT mask. This is fairly
+ common. Since we know this is an alpha host, speed the check by
+ using cmpbge to compare 8 bytes at once, and incidentally also
+ produce the zapnot mask. */
+ /* ??? This builtin was implemented sometime in 2002,
+ perhaps in the GCC 3.1 timeframe. */
+ mask0 = __builtin_alpha_cmpbge(0, val);
+ maskff = __builtin_alpha_cmpbge(val, -1);
+
+ /* Here, mask0 contains the bytes that are 0, maskff contains
+ the bytes that are 0xff; that should cover the entire word. */
+ if ((mask0 | maskff) == 0xff) {
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, ra, maskff, rc);
+ } else {
+ /* Val contains bytes that are neither 0 nor 0xff, which
+ means that we cannot use zapnot. Load the constant. */
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, val);
+ tcg_out_fmt_opr(s, INSN_AND, ra, TMP_REG1, rc);
+ }
+ }
+}
+
+static void tcg_out_extend(TCGContext *s, int sizeop, int ra, int rc)
+{
+ switch (sizeop) {
+ case 0:
+ tcg_out_fmt_opi(s, INSN_AND, ra, 0xff, rc);
+ break;
+ case 0 | 4:
+ tcg_out_fmt_opr(s, INSN_SEXTB, TCG_REG_31, ra, rc);
+ break;
+ case 1:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, ra, 0x03, rc);
+ break;
+ case 1 | 4:
+ tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, ra, rc);
+ break;
+ case 2:
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, ra, 0x0f, rc);
+ break;
+ case 2 | 4:
+ tcg_out_fmt_opr(s, INSN_ADDL, TCG_REG_31, ra, rc);
+ break;
+ case 3:
+ tcg_out_mov(s, ra, rc);
+ break;
+ default:
+ tcg_abort();
+ }
+}
+
+static void tcg_out_bswap(TCGContext *s, int sizeop, int ra, int rc)
+{
+ const int t0 = TMP_REG1, t1 = TMP_REG2, t2 = TMP_REG3;
+
+ switch (sizeop) {
+ case 1: /* 16-bit swap, unsigned result */
+ case 1 | 4: /* 16-bit swap, signed result */
+ /* input value = xxxx xxAB */
+ tcg_out_fmt_opi(s, INSN_EXTWH, ra, 7, t0); /* .... ..B. */
+ tcg_out_fmt_opi(s, INSN_EXTBL, ra, 1, rc); /* .... ...A */
+ tcg_out_fmt_opr(s, INSN_BIS, rc, t0, rc); /* .... ..BA */
+ if (sizeop & 4) {
+ tcg_out_fmt_opr(s, INSN_SEXTW, TCG_REG_31, rc, rc);
+ }
+ break;
+
+ case 2: /* 32-bit swap, unsigned result */
+ case 2 | 4: /* 32-bit swap, signed result */
+ /* input value = xxxx ABCD */
+ tcg_out_fmt_opi(s, INSN_INSLH, ra, 7, t0); /* .... .ABC */
+ tcg_out_fmt_opi(s, INSN_INSWL, ra, 3, t1); /* ...C D... */
+ tcg_out_fmt_opr(s, INSN_BIS, t0, t1, t1); /* ...C DABC */
+ tcg_out_fmt_opi(s, INSN_SRL, t1, 16, t0); /* .... .CDA */
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, t1, 0x0A, t1); /* .... D.B. */
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, t1, 0x05, t1); /* .... .C.A */
+ tcg_out_fmt_opr(s, (sizeop & 4 ? INSN_ADDL : INSN_BIS), t0, t1, rc);
+ break;
+
+ case 3: /* 64-bit swap */
+ /* input value = ABCD EFGH */
+ tcg_out_fmt_opi(s, INSN_SRL, ra, 24, t0); /* ...A BCDE */
+ tcg_out_fmt_opi(s, INSN_SLL, ra, 24, t1); /* DEFG H... */
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, t0, 0x11, t0); /* ...A ...E */
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, t1, 0x88, t1); /* D... H... */
+ tcg_out_fmt_opr(s, INSN_BIS, t0, t1, t2); /* D..A H..E */
+ tcg_out_fmt_opi(s, INSN_SRL, ra, 8, t0); /* .ABC DEFG */
+ tcg_out_fmt_opi(s, INSN_SLL, ra, 8, t1); /* BCDE FGH. */
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, t0, 0x22, t0); /* ..B. ..F. */
+ tcg_out_fmt_opi(s, INSN_ZAPNOT, t1, 0x44, t1); /* .C.. .G.. */
+ tcg_out_fmt_opr(s, INSN_BIS, t0, t2, t2); /* D.BA H.FE */
+ tcg_out_fmt_opr(s, INSN_BIS, t1, t2, t2); /* DCBA HGFE */
+ tcg_out_fmt_opi(s, INSN_SRL, t2, 32, t0); /* .... DCBA */
+ tcg_out_fmt_opi(s, INSN_SLL, t2, 32, t1); /* HGFE .... */
+ tcg_out_fmt_opr(s, INSN_BIS, t0, t1, rc); /* HGFE DCBA */
+ break;
+
+ default:
+ tcg_abort();
+ }
+}
+
+static void tcg_out_ld_sz(TCGContext *s, int sizeop, int ra, int rb,
+ int64_t disp)
+{
+ static const int ld_opc[4] = { INSN_LDBU, INSN_LDWU, INSN_LDL, INSN_LDQ };
+
+ tcg_out_mem_long(s, ld_opc[sizeop & 3], ra, rb, disp);
+
+ switch (sizeop) {
+ case 0 | 4 | 8:
+ case 0 | 4:
+ case 1 | 4:
+ case 2:
+ tcg_out_extend(s, sizeop, ra, ra);
+ break;
+
+ case 0:
+ case 0 | 8:
+ case 1:
+ case 2 | 4:
+ case 3:
+ break;
+
+ case 1 | 8:
+ case 1 | 4 | 8:
+ case 2 | 8:
+ case 2 | 4 | 8:
+ case 3 | 8:
+ tcg_out_bswap(s, sizeop & 7, ra, ra);
+ break;
+
+ default:
+ tcg_abort();
+ }
+}
+
+static void tcg_out_st_sz(TCGContext *s, int sizeop, int ra, int rb,
+ int64_t disp)
+{
+ static const int st_opc[4] = { INSN_STB, INSN_STW, INSN_STL, INSN_STQ };
+
+ if ((sizeop & 8) && (sizeop & 3) > 0) {
+ tcg_out_bswap(s, sizeop & 3, ra, TMP_REG1);
+ ra = TMP_REG1;
+ }
+
+ tcg_out_mem_long(s, st_opc[sizeop & 3], ra, rb, disp);
+}
+
+static void patch_reloc(uint8_t *x_ptr, int type, int64_t value, int64_t add)
+{
+ uint32_t *code_ptr = (uint32_t *)x_ptr;
+ uint32_t insn = *code_ptr;
+
+ value += add;
+ switch (type) {
+ case R_ALPHA_BRADDR:
+ value -= (long)x_ptr + 4;
+ if ((value & 3) || value < -0x400000 || value >= 0x400000) {
+ tcg_abort();
+ }
+ *code_ptr = insn | INSN_DISP21(value >> 2);
+ break;
+
+ default:
+ tcg_abort();
+ }
+}
+
+static void tcg_out_br(TCGContext *s, int opc, int ra, int label_index)
+{
+ TCGLabel *l = &s->labels[label_index];
+ long value;
+
+ if (l->has_value) {
+ value = l->u.value;
+ value -= (long)s->code_ptr + 4;
+ if ((value & 3) || value < -0x400000 || value >= 0x400000) {
+ tcg_abort();
+ }
+ value >>= 2;
+ } else {
+ tcg_out_reloc(s, s->code_ptr, R_ALPHA_BRADDR, label_index, 0);
+ value = 0;
+ }
+ tcg_out_fmt_br(s, opc, ra, value);
+}
+
+static void tcg_out_brcond(TCGContext *s, int cond, TCGArg arg1,
+ TCGArg arg2, int const_arg2, int label_index)
+{
+ static const int br_opc[10] = {
+ [TCG_COND_EQ] = INSN_BEQ,
+ [TCG_COND_NE] = INSN_BNE,
+ [TCG_COND_LT] = INSN_BLT,
+ [TCG_COND_GE] = INSN_BGE,
+ [TCG_COND_LE] = INSN_BLE,
+ [TCG_COND_GT] = INSN_BGT
+ };
+
+ static const uint64_t cmp_opc[10] = {
+ [TCG_COND_EQ] = INSN_CMPEQ,
+ [TCG_COND_NE] = INSN_CMPEQ,
+ [TCG_COND_LT] = INSN_CMPLT,
+ [TCG_COND_GE] = INSN_CMPLT,
+ [TCG_COND_LE] = INSN_CMPLE,
+ [TCG_COND_GT] = INSN_CMPLE,
+ [TCG_COND_LTU] = INSN_CMPULT,
+ [TCG_COND_GEU] = INSN_CMPULT,
+ [TCG_COND_LEU] = INSN_CMPULE,
+ [TCG_COND_GTU] = INSN_CMPULE
+ };
+
+ int opc = 0;
+
+ if (const_arg2) {
+ if (arg2 == 0) {
+ opc = br_opc[cond];
+ } else if (cond == TCG_COND_EQ || cond == TCG_COND_NE) {
+ tcg_out_mem_long(s, INSN_LDA, TMP_REG1, arg1, -arg2);
+ opc = (cond == TCG_COND_EQ ? INSN_BEQ : INSN_BNE);
+ }
+ }
+
+ if (opc == 0) {
+ opc = cmp_opc[cond];
+ if (const_arg2) {
+ tcg_out_fmt_opi(s, opc, arg1, arg2, TMP_REG1);
+ } else {
+ tcg_out_fmt_opr(s, opc, arg1, arg2, TMP_REG1);
+ }
+ opc = (cond & 1) ? INSN_BEQ : INSN_BNE;
+ arg1 = TMP_REG1;
+ }
+
+ tcg_out_br(s, opc, arg1, label_index);
+}
+
+static void tcg_out_div(TCGContext *s, int sizeop)
+{
+ /* Note that these functions don't have normal C calling conventions. */
+ typedef long divfn(long, long);
+ extern divfn __divl, __divlu, __reml, __remlu;
+ extern divfn __divq, __divqu, __remq, __remqu;
+
+ static divfn * const libc_div[16] = {
+ [2] = __divlu,
+ [2 | 8] = __remlu,
+ [2 | 4] = __divl,
+ [2 | 4 | 8] = __reml,
+
+ [3] = __divqu,
+ [3 | 8] = __remqu,
+ [3 | 4] = __divq,
+ [3 | 4 | 8] = __remq,
+ };
+
+ long val;
+
+#ifndef __linux__
+ /* ??? A comment in GCC suggests that OSF/1 and WinNT both have a
+ bug such that even 32-bit inputs must be extended to 64-bits.
+ This is known to work properly on Linux, at least. */
+ if ((sizeop & 3) != 3) {
+ tcg_out_extend(s, sizeop, TCG_REG_24, TCG_REG_24);
+ tcg_out_extend(s, sizeop, TCG_REG_25, TCG_REG_25);
+ }
+#endif
+
+ val = (long) libc_div[sizeop];
+ if (val == 0) {
+ tcg_abort();
+ }
+
+ tcg_out_movi(s, TCG_TYPE_I64, TMP_REG1, val);
+ tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_23, TMP_REG1, val);
+}
+
+#if defined(CONFIG_SOFTMMU)
+
+#include "../../softmmu_defs.h"
+
+static void *qemu_ld_helpers[4] = {
+ __ldb_mmu,
+ __ldw_mmu,
+ __ldl_mmu,
+ __ldq_mmu,
+};
+
+static void *qemu_st_helpers[4] = {
+ __stb_mmu,
+ __stw_mmu,
+ __stl_mmu,
+ __stq_mmu,
+};
+
+static void tcg_out_tlb_cmp(TCGContext *s, int sizeop, int r0, int r1,
+ int addr_reg, int label1, long tlb_offset)
+{
+ long val;
+
+ /* Mask the page, plus the low bits of the access, into R0. Note
+ that the low bits are added in order to catch unaligned accesses,
+ as those bits won't be set in the TLB entry. For 32-bit targets,
+ force the high bits of the mask to be zero, as the high bits of
+ the input register are garbage. */
+ val = TARGET_PAGE_MASK | ((1 << (sizeop & 3)) - 1);
+ if (TARGET_LONG_BITS == 32) {
+ val &= 0xffffffffu;
+ }
+ tcg_out_andi(s, addr_reg, val, r0);
+
+ /* Compute the index into the TLB into R1. Again, note that the
+ high bits of a 32-bit address must be cleared. */
+ tcg_out_fmt_opi(s, INSN_SRL, addr_reg,
+ TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS, r1);
+
+ val = (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS;
+ if (TARGET_LONG_BITS == 32) {
+ val &= 0xffffffffu >> (TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
+ }
+ tcg_out_andi(s, r1, val, r1);
+
+ /* Load the word at (R1 + CPU_ENV + TLB_OFFSET). Note that we
+ arrange for a 32-bit load to be zero-extended. */
+ tcg_out_fmt_opr(s, INSN_ADDQ, r1, TCG_AREG0, r1);
+ tcg_out_ld_sz(s, TARGET_LONG_BITS == 32 ? 2 : 3,
+ TMP_REG2, r1, tlb_offset);
+
+ /* Compare R0 with the value loaded from the TLB. */
+ tcg_out_brcond(s, TCG_COND_NE, TMP_REG2, r0, 0, label1);
+}
+#endif /* SOFTMMU */
+
+static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, int sizeop)
+{
+ int addr_reg, data_reg, r0, r1, mem_index, bswap;
+ long val;
+#if defined(CONFIG_SOFTMMU)
+ int label1, label2;
+#endif
+
+ data_reg = *args++;
+ addr_reg = *args++;
+ mem_index = *args;
+
+ r0 = TCG_REG_16;
+ r1 = TCG_REG_17;
+
+#if defined(CONFIG_SOFTMMU)
+ label1 = gen_new_label();
+ label2 = gen_new_label();
+
+ tcg_out_tlb_cmp(s, sizeop, r0, r1, addr_reg, label1,
+ offsetof(CPUState, tlb_table[mem_index][0].addr_read));
+
+ /* TLB Hit. Note that Alpha statically predicts forward branch as
+ not taken, so arrange the fallthru as the common case.
+
+ ADDR_REG contains the guest address, and R1 contains the pointer
+ to TLB_ENTRY.ADDR_READ. We need to load TLB_ENTRY.ADDEND and
+ add it to ADDR_REG to get the host address. */
+
+ tcg_out_ld(s, TCG_TYPE_I64, r1, r1,
+ offsetof(CPUTLBEntry, addend)
+ - offsetof(CPUTLBEntry, addr_read));
+
+ if (TARGET_LONG_BITS == 32) {
+ tcg_out_extend(s, 2, addr_reg, r0);
+ addr_reg = r0;
+ }
+
+ tcg_out_fmt_opr(s, INSN_ADDQ, addr_reg, r1, r0);
+ val = 0;
+#else
+ r0 = addr_reg;
+ val = GUEST_BASE;
+#endif
+
+#if defined(TARGET_WORDS_BIGENDIAN)
+ /* Signal byte swap necessary. */
+ bswap = 8;
+#else
+ bswap = 0;
+#endif
+
+ /* Perform the actual load. */
+ tcg_out_ld_sz(s, sizeop | bswap, data_reg, r0, val);
+
+#if defined(CONFIG_SOFTMMU)
+ tcg_out_br(s, INSN_BR, TCG_REG_31, label2);
+
+ /* TLB miss. Call the helper function. */
+ tcg_out_label(s, label1, (long)s->code_ptr);
+ tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_17, mem_index);
+
+ val = (long)qemu_ld_helpers[sizeop & 3];
+ tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_27, val);
+ tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, TCG_REG_27, val);
+
+ /* The helper routines have no defined data extension.
+ Properly extend the result to whatever data type we need. */
+ tcg_out_extend(s, sizeop, TCG_REG_0, data_reg);
+
+ tcg_out_label(s, label2, (long)s->code_ptr);
+#endif
+}
+
+static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int sizeop)
+{
+ int addr_reg, data_reg, r0, r1, mem_index, bswap;
+ long val;
+#if defined(CONFIG_SOFTMMU)
+ int label1, label2;
+#endif
+
+ data_reg = *args++;
+ addr_reg = *args++;
+ mem_index = *args;
+
+ r0 = TCG_REG_16;
+ r1 = TCG_REG_17;
+
+#if defined(CONFIG_SOFTMMU)
+ label1 = gen_new_label();
+ label2 = gen_new_label();
+
+ tcg_out_tlb_cmp(s, sizeop, r0, r1, addr_reg, label1,
+ offsetof(CPUState, tlb_table[mem_index][0].addr_write));
+
+ /* TLB Hit. Note that Alpha statically predicts forward branch as
+ not taken, so arrange the fallthru as the common case.
+
+ ADDR_REG contains the guest address, and R1 contains the pointer
+ to TLB_ENTRY.ADDR_READ. We need to load TLB_ENTRY.ADDEND and
+ add it to ADDR_REG to get the host address. */
+
+ tcg_out_ld(s, TCG_TYPE_I64, r1, r1,
+ offsetof(CPUTLBEntry, addend)
+ - offsetof(CPUTLBEntry, addr_write));
+
+ if (TARGET_LONG_BITS == 32) {
+ tcg_out_extend(s, 2, addr_reg, r0);
+ addr_reg = r0;
+ }
+
+ tcg_out_fmt_opr(s, INSN_ADDQ, addr_reg, r1, r0);
+ val = 0;
+#else
+ r0 = addr_reg;
+ val = GUEST_BASE;
+#endif
+
+#if defined(TARGET_WORDS_BIGENDIAN)
+ /* Signal byte swap necessary. */
+ bswap = 8;
+#else
+ bswap = 0;
+#endif
+
+ /* Perform the actual load. */
+ tcg_out_st_sz(s, sizeop | bswap, data_reg, r0, val);
+
+#if defined(CONFIG_SOFTMMU)
+ tcg_out_br(s, INSN_BR, TCG_REG_31, label2);
+
+ /* TLB miss. Call the helper function. */
+ tcg_out_label(s, label1, (long)s->code_ptr);
+ tcg_out_mov(s, TCG_REG_17, data_reg);
+ tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_18, mem_index);
+
+ val = (long)qemu_st_helpers[sizeop & 3];
+ tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_27, val);
+ tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, TCG_REG_27, val);
+
+ tcg_out_label(s, label2, (long)s->code_ptr);
+#endif
+}
+
+static inline void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
+ const int *const_args)
+{
+ long arg0, arg1, arg2;
+ int c;
+
+ arg0 = args[0];
+ arg1 = args[1];
+ arg2 = args[2];
+
+ switch (opc) {
+ case INDEX_op_exit_tb:
+ tcg_out_ld(s, TCG_TYPE_I64, TMP_REG1, TCG_REG_30, TB_RET_OFS);
+ tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_0, arg0);
+ tcg_out_fmt_jmp(s, INSN_RET, TCG_REG_31, TMP_REG1, 0);
+ break;
+
+ case INDEX_op_goto_tb:
+ if (s->tb_jmp_offset) {
+ /* Direct jump method. */
+ /* Reserve 6 insns. In alpha_tb_set_jmp_target, if the
+ displacement happens to be in range (and I suspect it will
+ be much of the time) then install a direct branch. Otherwise
+ we can load the 64-bit constant into the first 5 insns and do
+ an indirect jump with the 6th. */
+ s->tb_jmp_offset[arg0] = s->code_ptr - s->code_buf;
+
+ /* Fill with BUGCHK plus 5 nops, to be sure it's filled in. */
+ tcg_out32(s, INSN_BUGCHK);
+ tcg_out_fmt_opr(s, INSN_BIS, TCG_REG_31, TCG_REG_31, TCG_REG_31);
+ tcg_out_fmt_opr(s, INSN_BIS, TCG_REG_31, TCG_REG_31, TCG_REG_31);
+ tcg_out_fmt_opr(s, INSN_BIS, TCG_REG_31, TCG_REG_31, TCG_REG_31);
+ tcg_out_fmt_opr(s, INSN_BIS, TCG_REG_31, TCG_REG_31, TCG_REG_31);
+ tcg_out_fmt_opr(s, INSN_BIS, TCG_REG_31, TCG_REG_31, TCG_REG_31);
+ } else {
+ /* Indirect jump method. */
+ tcg_abort();
+ }
+ s->tb_next_offset[arg0] = s->code_ptr - s->code_buf;
+ break;
+
+ case INDEX_op_call:
+ tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_26, TCG_REG_27, 0);
+ break;
+
+ case INDEX_op_jmp:
+ tcg_out_fmt_jmp(s, INSN_JMP, TCG_REG_31, arg0, 0);
+ break;
+
+ case INDEX_op_br:
+ tcg_out_br(s, INSN_BR, TCG_REG_31, arg0);
+ break;
+
+ case INDEX_op_ld8u_i32:
+ case INDEX_op_ld8u_i64:
+ c = 0;
+ goto do_load;
+ case INDEX_op_ld8s_i32:
+ case INDEX_op_ld8s_i64:
+ c = 0 | 4;
+ goto do_load;
+ case INDEX_op_ld16u_i32:
+ case INDEX_op_ld16u_i64:
+ c = 1;
+ goto do_load;
+ case INDEX_op_ld16s_i32:
+ case INDEX_op_ld16s_i64:
+ c = 1 | 4;
+ goto do_load;
+ case INDEX_op_ld32u_i64:
+ c = 2;
+ goto do_load;
+ case INDEX_op_ld_i32:
+ case INDEX_op_ld32s_i64:
+ c = 2 | 4;
+ goto do_load;
+ case INDEX_op_ld_i64:
+ c = 3;
+ do_load:
+ tcg_out_ld_sz(s, c, arg0, arg1, arg2);
+ break;
+
+ case INDEX_op_st8_i32:
+ case INDEX_op_st8_i64:
+ c = 0;
+ goto do_store;
+ case INDEX_op_st16_i32:
+ case INDEX_op_st16_i64:
+ c = 1;
+ goto do_store;
+ case INDEX_op_st_i32:
+ case INDEX_op_st32_i64:
+ c = 2;
+ goto do_store;
+ case INDEX_op_st_i64:
+ c = 3;
+ do_store:
+ tcg_out_st_sz(s, c, arg0, arg1, arg2);
+ break;
+
+ case INDEX_op_sub_i32:
+ if (const_args[2]) {
+ arg2 = -args[2];
+ } else {
+ c = INSN_SUBL;
+ goto do_arith;
+ }
+ /* FALLTHRU */
+
+ case INDEX_op_add_i32:
+ /* Note there is no guarantee of a sign-extended result. */
+ if (const_args[2]) {
+ if (const_args[1]) {
+ arg1 = TCG_REG_31;
+ }
+ tcg_out_mem_long(s, INSN_LDA, arg0, arg1, (int32_t)arg2);
+ } else {
+ c = INSN_ADDL;
+ goto do_arith;
+ }
+ break;
+
+ case INDEX_op_sub_i64:
+ if (const_args[2]) {
+ arg2 = -args[2];
+ } else {
+ c = INSN_SUBQ;
+ goto do_arith;
+ }
+ /* FALLTHRU */
+
+ case INDEX_op_add_i64:
+ if (const_args[2]) {
+ if (const_args[1]) {
+ arg1 = TCG_REG_31;
+ }
+ tcg_out_mem_long(s, INSN_LDA, arg0, arg1, arg2);
+ } else {
+ c = INSN_ADDQ;
+ goto do_arith;
+ }
+ break;
+
+ case INDEX_op_mul_i32:
+ c = INSN_MULL;
+ goto do_arith;
+
+ case INDEX_op_mul_i64:
+ c = INSN_MULQ;
+ goto do_arith;
+
+ case INDEX_op_and_i32:
+ case INDEX_op_and_i64:
+ if (const_args[2]) {
+ if (const_args[1]) {
+ arg1 = TCG_REG_31;
+ }
+ if (opc == INDEX_op_and_i32) {
+ arg2 = (uint32_t)arg2;
+ }
+ tcg_out_andi(s, arg1, arg2, arg0);
+ break;
+ }
+ c = INSN_AND;
+ goto do_arith;
+
+ case INDEX_op_or_i32:
+ case INDEX_op_or_i64:
+ c = INSN_BIS;
+ goto do_arith;
+
+ case INDEX_op_xor_i32:
+ case INDEX_op_xor_i64:
+ c = INSN_XOR;
+ goto do_arith;
+
+ case INDEX_op_shl_i32:
+ case INDEX_op_shl_i64:
+ c = INSN_SLL;
+ goto do_arith;
+
+ case INDEX_op_shr_i32:
+ if (!const_args[1]) {
+ tcg_out_extend(s, 2, arg1, arg1);
+ }
+ /* FALLTHRU */
+ case INDEX_op_shr_i64:
+ c = INSN_SRL;
+ goto do_arith;
+
+ case INDEX_op_sar_i32:
+ if (!const_args[1]) {
+ tcg_out_extend(s, 2 | 4, arg1, arg1);
+ }
+ /* FALLTHRU */
+ case INDEX_op_sar_i64:
+ c = INSN_SRA;
+ goto do_arith;
+
+ do_arith:
+ if (const_args[1]) {
+ arg1 = TCG_REG_31;
+ }
+ if (const_args[2]) {
+ tcg_out_fmt_opi(s, c, arg1, arg2, arg0);
+ } else {
+ tcg_out_fmt_opr(s, c, arg1, arg2, arg0);
+ }
+ break;
+
+ case INDEX_op_not_i32:
+ case INDEX_op_not_i64:
+ if (const_args[1]) {
+ tcg_out_fmt_opi(s, INSN_ORNOT, TCG_REG_31, arg1, arg0);
+ } else {
+ tcg_out_fmt_opr(s, INSN_ORNOT, TCG_REG_31, arg1, arg0);
+ }
+ goto do_arith;
+
+ case INDEX_op_brcond_i32:
+ /* 32-bit operands have undefined high bits. Sign extend both
+ input operands to correct that. Note that this extension
+ works even for unsigned comparisons, so long as both operands
+ are similarly extended. */
+ if (!const_args[0]) {
+ tcg_out_extend(s, 2 | 4, arg0, arg0);
+ }
+ if (!const_args[1]) {
+ tcg_out_extend(s, 2 | 4, arg1, arg1);
+ }
+ /* FALLTHRU */
+ case INDEX_op_brcond_i64:
+ if (const_args[0]) {
+ arg0 = TCG_REG_31;
+ }
+ tcg_out_brcond(s, arg2, arg0, arg1, const_args[1], args[3]);
+ break;
+
+ case INDEX_op_ext8s_i32:
+ case INDEX_op_ext8s_i64:
+ c = 0 | 4;
+ goto do_sign_extend;
+ case INDEX_op_ext16s_i32:
+ case INDEX_op_ext16s_i64:
+ c = 1 | 4;
+ goto do_sign_extend;
+ case INDEX_op_ext32s_i64:
+ c = 2 | 4;
+ do_sign_extend:
+ if (const_args[1]) {
+ arg1 = TCG_REG_31;
+ }
+ tcg_out_extend(s, c, arg1, arg0);
+ break;
+
+ case INDEX_op_div_i32:
+ c = 2 | 4;
+ goto do_div;
+ case INDEX_op_rem_i32:
+ c = 2 | 4 | 8;
+ goto do_div;
+ case INDEX_op_divu_i32:
+ c = 2;
+ goto do_div;
+ case INDEX_op_remu_i32:
+ c = 2 | 8;
+ goto do_div;
+ case INDEX_op_div_i64:
+ c = 3 | 4;
+ goto do_div;
+ case INDEX_op_rem_i64:
+ c = 3 | 4 | 8;
+ goto do_div;
+ case INDEX_op_divu_i64:
+ c = 3;
+ goto do_div;
+ case INDEX_op_remu_i64:
+ c = 3 | 8;
+ do_div:
+ tcg_out_div(s, c);
+ break;
+
+ case INDEX_op_bswap16_i32:
+ case INDEX_op_bswap16_i64:
+ c = 1;
+ goto do_bswap;
+ case INDEX_op_bswap32_i32:
+ case INDEX_op_bswap32_i64:
+ c = 2;
+ goto do_bswap;
+ case INDEX_op_bswap64_i64:
+ c = 3;
+ do_bswap:
+ if (const_args[1]) {
+ arg1 = TCG_REG_31;
+ }
+ tcg_out_bswap(s, c, arg1, arg0);
+ break;
+
+ case INDEX_op_qemu_ld8u:
+ c = 0;
+ goto do_qemu_load;
+ case INDEX_op_qemu_ld8s:
+ c = 0 | 4;
+ goto do_qemu_load;
+ case INDEX_op_qemu_ld16u:
+ c = 1;
+ goto do_qemu_load;
+ case INDEX_op_qemu_ld16s:
+ c = 1 | 4;
+ goto do_qemu_load;
+ case INDEX_op_qemu_ld32u:
+ c = 2;
+ goto do_qemu_load;
+ case INDEX_op_qemu_ld32s:
+ c = 2 | 4;
+ goto do_qemu_load;
+ case INDEX_op_qemu_ld64:
+ c = 3;
+ do_qemu_load:
+ tcg_out_qemu_ld(s, args, c);
+ break;
+
+ case INDEX_op_qemu_st8:
+ c = 0;
+ goto do_qemu_store;
+ case INDEX_op_qemu_st16:
+ c = 1;
+ goto do_qemu_store;
+ case INDEX_op_qemu_st32:
+ c = 2;
+ goto do_qemu_store;
+ case INDEX_op_qemu_st64:
+ c = 3;
+ do_qemu_store:
+ tcg_out_qemu_st(s, args, c);
+ break;
+
+ case INDEX_op_mov_i32:
+ case INDEX_op_mov_i64:
+ case INDEX_op_movi_i32:
+ case INDEX_op_movi_i64:
+ /* These four are handled by tcg.c directly. */
+ default:
+ tcg_abort();
+ }
+}
+
+static const TCGTargetOpDef alpha_op_defs[] = {
+ { INDEX_op_exit_tb, { } },
+ { INDEX_op_goto_tb, { } },
+ { INDEX_op_call, { "c" } },
+ { INDEX_op_jmp, { "r" } },
+ { INDEX_op_br, { } },
+
+ { INDEX_op_ld8u_i32, { "r", "r" } },
+ { INDEX_op_ld8s_i32, { "r", "r" } },
+ { INDEX_op_ld16u_i32, { "r", "r" } },
+ { INDEX_op_ld16s_i32, { "r", "r" } },
+ { INDEX_op_ld_i32, { "r", "r" } },
+ { INDEX_op_st8_i32, { "r", "r" } },
+ { INDEX_op_st16_i32, { "r", "r" } },
+ { INDEX_op_st_i32, { "r", "r" } },
+
+ { INDEX_op_add_i32, { "r", "rJ", "ri" } },
+ { INDEX_op_mul_i32, { "r", "rJ", "rI" } },
+ { INDEX_op_sub_i32, { "r", "rJ", "ri" } },
+ { INDEX_op_and_i32, { "r", "rJ", "ri" } },
+ { INDEX_op_or_i32, { "r", "rJ", "rI" } },
+ { INDEX_op_xor_i32, { "r", "rJ", "rI" } },
+ { INDEX_op_not_i32, { "r", "rI" } },
+
+ { INDEX_op_shl_i32, { "r", "rJ", "rI" } },
+ { INDEX_op_shr_i32, { "r", "rJ", "rI" } },
+ { INDEX_op_sar_i32, { "r", "rJ", "rI" } },
+
+ { INDEX_op_div_i32, { "c", "a", "b" } },
+ { INDEX_op_rem_i32, { "c", "a", "b" } },
+ { INDEX_op_divu_i32, { "c", "a", "b" } },
+ { INDEX_op_remu_i32, { "c", "a", "b" } },
+
+ { INDEX_op_brcond_i32, { "rJ", "rI" } },
+
+ { INDEX_op_ld8u_i64, { "r", "r" } },
+ { INDEX_op_ld8s_i64, { "r", "r" } },
+ { INDEX_op_ld16u_i64, { "r", "r" } },
+ { INDEX_op_ld16s_i64, { "r", "r" } },
+ { INDEX_op_ld32u_i64, { "r", "r" } },
+ { INDEX_op_ld32s_i64, { "r", "r" } },
+ { INDEX_op_ld_i64, { "r", "r" } },
+ { INDEX_op_st8_i64, { "r", "r" } },
+ { INDEX_op_st16_i64, { "r", "r" } },
+ { INDEX_op_st32_i64, { "r", "r" } },
+ { INDEX_op_st_i64, { "r", "r" } },
+
+ { INDEX_op_add_i64, { "r", "rJ", "ri" } },
+ { INDEX_op_mul_i64, { "r", "rJ", "rI" } },
+ { INDEX_op_sub_i64, { "r", "rJ", "ri" } },
+ { INDEX_op_and_i64, { "r", "rJ", "ri" } },
+ { INDEX_op_or_i64, { "r", "rJ", "rI" } },
+ { INDEX_op_xor_i64, { "r", "rJ", "rI" } },
+ { INDEX_op_not_i64, { "r", "rI" } },
+
+ { INDEX_op_shl_i64, { "r", "rJ", "rI" } },
+ { INDEX_op_shr_i64, { "r", "rJ", "rI" } },
+ { INDEX_op_sar_i64, { "r", "rJ", "rI" } },
+
+ { INDEX_op_div_i64, { "c", "a", "b" } },
+ { INDEX_op_rem_i64, { "c", "a", "b" } },
+ { INDEX_op_divu_i64, { "c", "a", "b" } },
+ { INDEX_op_remu_i64, { "c", "a", "b" } },
+
+ { INDEX_op_brcond_i64, { "rJ", "rI" } },
+
+ { INDEX_op_ext8s_i32, { "r", "rJ" } },
+ { INDEX_op_ext16s_i32, { "r", "rJ" } },
+ { INDEX_op_ext8s_i64, { "r", "rJ" } },
+ { INDEX_op_ext16s_i64, { "r", "rJ" } },
+ { INDEX_op_ext32s_i64, { "r", "rJ" } },
+
+ { INDEX_op_bswap16_i32, { "r", "rJ" } },
+ { INDEX_op_bswap32_i32, { "r", "rJ" } },
+ { INDEX_op_bswap16_i64, { "r", "rJ" } },
+ { INDEX_op_bswap32_i64, { "r", "rJ" } },
+ { INDEX_op_bswap64_i64, { "r", "rJ" } },
+
+ { INDEX_op_qemu_ld8u, { "r", "L" } },
+ { INDEX_op_qemu_ld8s, { "r", "L" } },
+ { INDEX_op_qemu_ld16u, { "r", "L" } },
+ { INDEX_op_qemu_ld16s, { "r", "L" } },
+ { INDEX_op_qemu_ld32u, { "r", "L" } },
+ { INDEX_op_qemu_ld32s, { "r", "L" } },
+ { INDEX_op_qemu_ld64, { "r", "L" } },
+
+ { INDEX_op_qemu_st8, { "L", "L" } },
+ { INDEX_op_qemu_st16, { "L", "L" } },
+ { INDEX_op_qemu_st32, { "L", "L" } },
+ { INDEX_op_qemu_st64, { "L", "L" } },
+ { -1 },
+};
+
+
+/*
+ * Generate global QEMU prologue and epilogue code
+ */
+void tcg_target_qemu_prologue(TCGContext *s)
+{
+ static const int save_regs[] = {
+ TCG_REG_26,
+ TCG_REG_9,
+ TCG_REG_10,
+ TCG_REG_11,
+ TCG_REG_12,
+ TCG_REG_13,
+ TCG_REG_14,
+ };
+
+ long i, frame_size, save_ofs;
+ uint8_t *ret_loc, *ent_loc;
+
+ /* The shape of the stack frame is:
+ input sp
+ [ Register save area ]
+ [ TB return address ]
+ [ TCG_STATIC_CALL_ARGS_SIZE ]
+ sp
+ */
+
+ save_ofs = TCG_STATIC_CALL_ARGS_SIZE + 8;
+ frame_size = save_ofs + ARRAY_SIZE(save_regs) * 8;
+ frame_size += TCG_TARGET_STACK_ALIGN - 1;
+ frame_size &= -TCG_TARGET_STACK_ALIGN;
+
+ /* TB Prologue. */
+ ent_loc = s->code_ptr;
+
+ /* Allocate the stack frame. */
+ tcg_out_fmt_mem(s, INSN_LDA, TCG_REG_30, TCG_REG_30, -frame_size);
+
+ /* Save all callee saved registers. */
+ for (i = 0; i < ARRAY_SIZE(save_regs); i++) {
+ tcg_out_fmt_mem(s, INSN_STQ, save_regs[i], TCG_REG_30, save_ofs + i*8);
+ }
+
+ /* ??? Store the return address of the TB. Ideally this would be
+ done at the beginning of the TB, storing $26 or something. But
+ we don't actually have control of the beginning of the TB. So
+ we compute this via arithmetic based off $27, which holds the
+ start address of this prologue. */
+ ret_loc = s->code_ptr;
+ tcg_out_fmt_mem(s, INSN_LDA, TMP_REG1, TCG_REG_27, 0);
+ tcg_out_fmt_mem(s, INSN_STQ, TMP_REG1, TCG_REG_30, TB_RET_OFS);
+
+ /* Invoke the TB. */
+ tcg_out_fmt_jmp(s, INSN_CALL, TCG_REG_31, TCG_REG_16, 0);
+
+ /* Fill in the offset for the TB return address, as described above. */
+ i = s->code_ptr - ent_loc;
+ if (i != (int16_t)i) {
+ tcg_abort();
+ }
+ *(int16_t *)ret_loc = i;
+
+ /* TB epilogue. */
+
+ /* Restore all callee saved registers. */
+ for (i = 0; i < ARRAY_SIZE(save_regs); i++) {
+ tcg_out_fmt_mem(s, INSN_LDQ, save_regs[i], TCG_REG_30, save_ofs + i*8);
+ }
+
+ /* Deallocate the stack frame. */
+ tcg_out_fmt_mem(s, INSN_LDA, TCG_REG_30, TCG_REG_30, frame_size);
+
+ tcg_out_fmt_jmp(s, INSN_RET, TCG_REG_31, TCG_REG_26, 0);
+}
+
+
+void tcg_target_init(TCGContext *s)
+{
+ /* fail safe */
+ if ((1 << CPU_TLB_ENTRY_BITS) != sizeof(CPUTLBEntry))
+ tcg_abort();
+
+ tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffffffff);
+ tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffffffff);
+
+ tcg_regset_set32(tcg_target_call_clobber_regs, 0, 0xffffffff);
+ tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_9);
+ tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_10);
+ tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_11);
+ tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_12);
+ tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_13);
+ tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_14);
+ tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_15);
+ tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_30);
+
+ tcg_regset_clear(s->reserved_regs);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_30);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_31);
+ tcg_regset_set_reg(s->reserved_regs, TMP_REG1);
+ tcg_regset_set_reg(s->reserved_regs, TMP_REG2);
+ tcg_regset_set_reg(s->reserved_regs, TMP_REG3);
+
+ tcg_add_target_add_op_defs(alpha_op_defs);
+}
+
+/* Called from exec-all.h, tb_set_jmp_target. */
+void alpha_tb_set_jmp_target(unsigned long jmp_addr, unsigned long addr);
+void alpha_tb_set_jmp_target(unsigned long jmp_addr, unsigned long addr)
+{
+ TCGContext s;
+ long disp;
+
+ s.code_ptr = s.code_buf = (uint8_t *)jmp_addr;
+
+ disp = jmp_addr + 4 - addr;
+ if (disp < -0x400000 || disp >= 0x400000) {
+ tcg_out_movi(&s, TCG_TYPE_I64, TMP_REG1, addr);
+ tcg_out_fmt_jmp(&s, INSN_JMP, TCG_REG_31, TMP_REG1, addr);
+ } else {
+ tcg_out_fmt_br(&s, INSN_BR, TCG_REG_31, disp);
+ }
+
+ flush_icache_range(0, -1);
+}
diff --git a/tcg/alpha/tcg-target.h b/tcg/alpha/tcg-target.h
new file mode 100644
index 0000000..278ff6a
--- /dev/null
+++ b/tcg/alpha/tcg-target.h
@@ -0,0 +1,89 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#define TCG_TARGET_ALPHA 1
+
+#define TCG_TARGET_REG_BITS 64
+
+#define TCG_TARGET_NB_REGS 32
+
+enum {
+ TCG_REG_0 = 0, TCG_REG_1, TCG_REG_2, TCG_REG_3,
+ TCG_REG_4, TCG_REG_5, TCG_REG_6, TCG_REG_7,
+ TCG_REG_8, TCG_REG_9, TCG_REG_10, TCG_REG_11,
+ TCG_REG_12, TCG_REG_13, TCG_REG_14, TCG_REG_15,
+ TCG_REG_16, TCG_REG_17, TCG_REG_18, TCG_REG_19,
+ TCG_REG_20, TCG_REG_21, TCG_REG_22, TCG_REG_23,
+ TCG_REG_24, TCG_REG_25, TCG_REG_26, TCG_REG_27,
+ TCG_REG_28, TCG_REG_29, TCG_REG_30, TCG_REG_31
+};
+
+#define TCG_CT_CONST_U8 0x100
+#define TCG_CT_CONST_ZERO 0x200
+
+/* Used for function call generation. */
+#define TCG_REG_CALL_STACK TCG_REG_30
+#define TCG_TARGET_STACK_ALIGN 16
+#define TCG_TARGET_CALL_STACK_OFFSET 0
+
+/* We have signed extension instructions. */
+#define TCG_TARGET_HAS_ext8s_i32
+#define TCG_TARGET_HAS_ext16s_i32
+#define TCG_TARGET_HAS_ext8s_i64
+#define TCG_TARGET_HAS_ext16s_i64
+#define TCG_TARGET_HAS_ext32s_i64
+
+/* We have single-output division routines. */
+#define TCG_TARGET_HAS_div_i32
+#define TCG_TARGET_HAS_div_i64
+
+/* We have optimized bswap routines. */
+#define TCG_TARGET_HAS_bswap16_i32
+#define TCG_TARGET_HAS_bswap32_i32
+#define TCG_TARGET_HAS_bswap16_i64
+#define TCG_TARGET_HAS_bswap32_i64
+#define TCG_TARGET_HAS_bswap64_i64
+
+/* We have NOT via ORNOT. */
+#define TCG_TARGET_HAS_not_i32
+#define TCG_TARGET_HAS_not_i64
+
+#define TCG_TARGET_HAS_GUEST_BASE
+
+/* Note: must be synced with dyngen-exec.h */
+#define TCG_AREG0 TCG_REG_15
+#define TCG_AREG1 TCG_REG_9
+#define TCG_AREG2 TCG_REG_10
+#define TCG_AREG3 TCG_REG_11
+#define TCG_AREG4 TCG_REG_12
+#define TCG_AREG5 TCG_REG_13
+#define TCG_AREG6 TCG_REG_14
+
+#define TMP_REG1 TCG_REG_28
+#define TMP_REG2 TCG_REG_29
+#define TMP_REG3 TCG_REG_23
+
+static inline void flush_icache_range(unsigned long start, unsigned long stop)
+{
+ __asm__ __volatile__ ("call_pal 0x86");
+}
^ permalink raw reply related [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-26 1:19 ` Richard Henderson
@ 2010-01-29 1:55 ` identifier scorpio
2010-01-29 17:04 ` Richard Henderson
2010-01-29 17:37 ` Richard Henderson
2010-01-29 19:19 ` Richard Henderson
2 siblings, 1 reply; 21+ messages in thread
From: identifier scorpio @ 2010-01-29 1:55 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel
[-- Attachment #1: Type: text/plain, Size: 1504 bytes --]
I'v reviewed your code and applied the patch to 0.12.0.rc1. After fixing some small bugs I run it on my debian/alpha platform, and it hung after running abort 3 TBs. I'll continue to trace your code.
The bugs that are fixed are listed as follow:
1. adding constraints for operation mov_i32/movi_i32/mov_i64/movi_i64
2. replacing "goto do_arith" with "break" for INDEX_op_not_i32/i64 case handling in tcg_out_op
3. removing the redundant declaration for "alpha_tb_set_jmp_target()" at tail of tcg-target.c, it has been declared in exec-all.h
I just find that a suspect bug in tcg_out_brcond() and have not tried yet.
if ( opc == 0) {
opc = cmp_opc[cond];
if ( const_arg2) { /* should be if (const_arg2 && arg2 & ~0xff == 0) ?
tcg_out_fmt_opi(s, opc, ...)
...
Your code is more skilled and I learn a lot from it, but I haven't yet recognized the key difference between your version and mine. In last mail, you've said that "Mainly, tcg_target_long was used places that could be holding HOST values, which means that the host values would have been truncated to 32 bits.", and I can't fully understand it, may you put it more clearly.
BTW, there is no internet access in my daily working environment, so forgive me for not being able to check my mail regularly.
Dong Weiyu.
___________________________________________________________
好玩贺卡等你发，邮箱贺卡全新上线！
http://card.mail.cn.yahoo.com/
[-- Attachment #2: Type: text/html, Size: 1769 bytes --]
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-29 1:55 ` identifier scorpio
@ 2010-01-29 17:04 ` Richard Henderson
2010-01-29 21:38 ` Edgar E. Iglesias
0 siblings, 1 reply; 21+ messages in thread
From: Richard Henderson @ 2010-01-29 17:04 UTC (permalink / raw)
To: identifier scorpio; +Cc: qemu-devel
On 01/28/2010 05:55 PM, identifier scorpio wrote:
> 1. adding constraints for operation mov_i32/movi_i32/mov_i64/movi_i64
> 2. replacing "goto do_arith" with "break" for INDEX_op_not_i32/i64 case
> handling in tcg_out_op
Oops.
> 3. removing the redundant declaration for "alpha_tb_set_jmp_target()" at
> tail of tcg-target.c, it has been declared in exec-all.h
Ah, yes, a line I had to add temporarily for the x86 compiler; I meant
to take it out again.
> I just find that a suspect bug in tcg_out_brcond() and have not tried yet.
>
> if ( opc == 0) {
> opc = cmp_opc[cond];
> if ( const_arg2) { /* should be if (const_arg2 && arg2 & ~0xff == 0) ?
> tcg_out_fmt_opi(s, opc, ...)
{ INDEX_op_brcond_i32, { "rJ", "rI" } },
{ INDEX_op_brcond_i64, { "rJ", "rI" } },
The "I" constraint is supposed to have already limited the constant to 0
.. 0xff. You could put an assert there if you like, to make sure
everything is going as it should.
> Your code is more skilled and I learn a lot from it, but I haven't yet
> recognized the key difference between your version and mine. In last
> mail, you've said that "Mainly, tcg_target_long was used places that
> could be holding HOST values, which means that the host values would
> have been truncated to 32 bits.", and I can't fully understand it, may
> you put it more clearly.
It was a mis-statement made while tired. Of course tcg_target_long is
defined to int64_t when TCG_TARGET_REG_BITS == 64, so there was no
truncation to 32 bits.
Have you tested of any of the other embedded targets? You may be able
to find the error with one of those easier than finding it emulating
full-scale Windows. See the images at the bottom of the QEMU download page.
r~
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-26 1:19 ` Richard Henderson
2010-01-29 1:55 ` identifier scorpio
@ 2010-01-29 17:37 ` Richard Henderson
2010-01-29 19:19 ` Richard Henderson
2 siblings, 0 replies; 21+ messages in thread
From: Richard Henderson @ 2010-01-29 17:37 UTC (permalink / raw)
To: identifier scorpio; +Cc: qemu-devel
[-- Attachment #1: Type: text/plain, Size: 209 bytes --]
On 01/25/2010 05:19 PM, Richard Henderson wrote:
> + } else if (~val == (uint8_t)~val) {
> + tcg_out_fmt_opi(s, INSN_BIC, ra, ~val, rc);
Bug here. I've applied the following to my local tree.
r~
[-- Attachment #2: commit-2ecce92 --]
[-- Type: text/plain, Size: 1115 bytes --]
commit 2ecce92da6eee4b3496c7655da45259308abb536
Author: Richard Henderson <rth@twiddle.net>
Date: Fri Jan 29 09:36:28 2010 -0800
tcg-alpha: Fix cast error with immediate op to BIC.
The cast was in the wrong place. A change to ~(uint8_t)val would
technically produce the correct result, but via a string of implicit
conversions that are more difficult to follow than simply using the
0xff mask with the original type.
Adjust the AND test to match, lexically, for cleanliness.
diff --git a/tcg/alpha/tcg-target.c b/tcg/alpha/tcg-target.c
index dcf23f2..5b7dd25 100644
--- a/tcg/alpha/tcg-target.c
+++ b/tcg/alpha/tcg-target.c
@@ -344,9 +344,9 @@ static inline void tcg_out_addi(TCGContext *s, int reg, long val)
static void tcg_out_andi(TCGContext *s, int ra, long val, int rc)
{
- if (val == (uint8_t)val) {
+ if (val == (val & 0xff)) {
tcg_out_fmt_opi(s, INSN_AND, ra, val, rc);
- } else if (~val == (uint8_t)~val) {
+ } else if (~val == ~(val & 0xff)) {
tcg_out_fmt_opi(s, INSN_BIC, ra, ~val, rc);
} else {
long mask0, maskff;
^ permalink raw reply related [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-26 1:19 ` Richard Henderson
2010-01-29 1:55 ` identifier scorpio
2010-01-29 17:37 ` Richard Henderson
@ 2010-01-29 19:19 ` Richard Henderson
2010-01-30 2:45 ` identifier scorpio
2 siblings, 1 reply; 21+ messages in thread
From: Richard Henderson @ 2010-01-29 19:19 UTC (permalink / raw)
To: identifier scorpio; +Cc: qemu-devel
[-- Attachment #1: Type: text/plain, Size: 472 bytes --]
> + } else if (cond == TCG_COND_EQ || cond == TCG_COND_NE) {
> + tcg_out_mem_long(s, INSN_LDA, TMP_REG1, arg1, -arg2);
> + opc = (cond == TCG_COND_EQ ? INSN_BEQ : INSN_BNE);
Bug here. What was intended was to add "arg1 = TMP_REG1".
But since the constraints use "I" for uint8_t input constants,
we might as well remove this hunk entirely.
Also, let's future-proof this routine against changes to
the layout of the TCGCond enumeration.
r~
[-- Attachment #2: commit-9d78757 --]
[-- Type: text/plain, Size: 4019 bytes --]
commit 9d787576342c193f13e2531953fc81442458de7e
Author: Richard Henderson <rth@twiddle.net>
Date: Fri Jan 29 11:14:20 2010 -0800
tcg-alpha: Fix EQ/NE with a constant.
There was start of code to handle EQ and NE with arbitrary constants,
but it wasn't completed. Remove the half-done code and add a comment
for future enhancements.
Also, don't rely on the current layout of TCGCond; instead encode the
need for inversion of the compare insn result by means of a low bit set
in the cmp_opc table. Reduce the element size of cmp_opc.
diff --git a/tcg/alpha/tcg-target.c b/tcg/alpha/tcg-target.c
index 5b7dd25..18ab2c8 100644
--- a/tcg/alpha/tcg-target.c
+++ b/tcg/alpha/tcg-target.c
@@ -540,9 +540,11 @@ static void tcg_out_br(TCGContext *s, int opc, int ra, int label_index)
tcg_out_fmt_br(s, opc, ra, value);
}
-static void tcg_out_brcond(TCGContext *s, int cond, TCGArg arg1,
+static void tcg_out_brcond(TCGContext *s, TCGCond cond, TCGArg arg1,
TCGArg arg2, int const_arg2, int label_index)
{
+ /* Note that unsigned comparisons are not present here, which means
+ that their entries will contain zeros. */
static const int br_opc[10] = {
[TCG_COND_EQ] = INSN_BEQ,
[TCG_COND_NE] = INSN_BNE,
@@ -552,38 +554,56 @@ static void tcg_out_brcond(TCGContext *s, int cond, TCGArg arg1,
[TCG_COND_GT] = INSN_BGT
};
- static const uint64_t cmp_opc[10] = {
+ /* The low bit of these entries indicates that the result of
+ the comparison must be inverted. This bit should not be
+ output with the rest of the instruction. */
+ static const int cmp_opc[10] = {
[TCG_COND_EQ] = INSN_CMPEQ,
- [TCG_COND_NE] = INSN_CMPEQ,
+ [TCG_COND_NE] = INSN_CMPEQ | 1,
[TCG_COND_LT] = INSN_CMPLT,
- [TCG_COND_GE] = INSN_CMPLT,
+ [TCG_COND_GE] = INSN_CMPLT | 1,
[TCG_COND_LE] = INSN_CMPLE,
- [TCG_COND_GT] = INSN_CMPLE,
+ [TCG_COND_GT] = INSN_CMPLE | 1,
[TCG_COND_LTU] = INSN_CMPULT,
- [TCG_COND_GEU] = INSN_CMPULT,
+ [TCG_COND_GEU] = INSN_CMPULT | 1,
[TCG_COND_LEU] = INSN_CMPULE,
- [TCG_COND_GTU] = INSN_CMPULE
+ [TCG_COND_GTU] = INSN_CMPULE | 1
};
int opc = 0;
- if (const_arg2) {
- if (arg2 == 0) {
- opc = br_opc[cond];
- } else if (cond == TCG_COND_EQ || cond == TCG_COND_NE) {
- tcg_out_mem_long(s, INSN_LDA, TMP_REG1, arg1, -arg2);
- opc = (cond == TCG_COND_EQ ? INSN_BEQ : INSN_BNE);
- }
+ /* Possible improvements:
+ (1) Notice arg1 == $31 and !const_arg2. In this case, swap the
+ two operands and swap the sense of the comparison to allow the
+ use of the direct branches.
+
+ (2) Allow arbitrary constants. We can, on occasion, generate one
+ less instruction if we compute
+ TMP = ARG1 - CONST
+ instead of
+ TMP = ARG1 cmp TMP2
+ where TMP2 is the constant loaded into a register by generic code.
+ Note that for 64-bit operands this works only for EQ and NE. For
+ 32-bit operands, we would need to either limit this to signed
+ comparisons or properly zero-extend unsigned inputs. The payoff
+ here isn't great though; much less than(1). */
+
+ /* Notice signed comparisons vs zero. These are handled by the
+ branch instructions directly. */
+ if (const_arg2 && arg2 == 0) {
+ opc = br_opc[cond];
}
+ /* Otherwise, generate a comparison into a temporary. */
if (opc == 0) {
- opc = cmp_opc[cond];
+ opc = cmp_opc[cond] & ~1;
if (const_arg2) {
tcg_out_fmt_opi(s, opc, arg1, arg2, TMP_REG1);
} else {
tcg_out_fmt_opr(s, opc, arg1, arg2, TMP_REG1);
}
- opc = (cond & 1) ? INSN_BEQ : INSN_BNE;
+
+ opc = (cmp_opc[cond] & 1 ? INSN_BEQ : INSN_BNE);
arg1 = TMP_REG1;
}
^ permalink raw reply related [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-29 17:04 ` Richard Henderson
@ 2010-01-29 21:38 ` Edgar E. Iglesias
2010-01-29 23:04 ` Stefan Weil
0 siblings, 1 reply; 21+ messages in thread
From: Edgar E. Iglesias @ 2010-01-29 21:38 UTC (permalink / raw)
To: Richard Henderson, identifier scorpio; +Cc: qemu-devel
On Fri, Jan 29, 2010 at 09:04:58AM -0800, Richard Henderson wrote:
> On 01/28/2010 05:55 PM, identifier scorpio wrote:
> > Your code is more skilled and I learn a lot from it, but I haven't yet
> > recognized the key difference between your version and mine. In last
> > mail, you've said that "Mainly, tcg_target_long was used places that
> > could be holding HOST values, which means that the host values would
> > have been truncated to 32 bits.", and I can't fully understand it, may
> > you put it more clearly.
>
> It was a mis-statement made while tired. Of course tcg_target_long is
> defined to int64_t when TCG_TARGET_REG_BITS == 64, so there was no
> truncation to 32 bits.
>
> Have you tested of any of the other embedded targets? You may be able
> to find the error with one of those easier than finding it emulating
> full-scale Windows. See the images at the bottom of the QEMU download page.
Hi,
Although I've never hacked on a TCG backend I'd still like to give some
advice.
>From experience when developing both the CRIS and the MicroBlaze ISA
translators I very much suggest getting something very stable to work
in linux-user before going further.
I used GCC's C torture tests and OpenSSL's bignum tests to verify the
ports. In particular, OpenSSL's bignum tests seem to excersice lot's of
cornercases.
If you pass those, you've come a long way. In general it's much easier
to debug a guest testcase (bntest, etc) that fails compared to huge
propretiary blob that fails (windows).
Just a suggestion, hope it helps.
Cheers,
Edgar
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-29 21:38 ` Edgar E. Iglesias
@ 2010-01-29 23:04 ` Stefan Weil
2010-01-30 0:38 ` Edgar E. Iglesias
2010-01-30 1:14 ` Laurent Desnogues
0 siblings, 2 replies; 21+ messages in thread
From: Stefan Weil @ 2010-01-29 23:04 UTC (permalink / raw)
To: Edgar E. Iglesias; +Cc: qemu-devel
Edgar E. Iglesias schrieb:
> On Fri, Jan 29, 2010 at 09:04:58AM -0800, Richard Henderson wrote:
>> On 01/28/2010 05:55 PM, identifier scorpio wrote:
>>> Your code is more skilled and I learn a lot from it, but I haven't yet
>>> recognized the key difference between your version and mine. In last
>>> mail, you've said that "Mainly, tcg_target_long was used places that
>>> could be holding HOST values, which means that the host values would
>>> have been truncated to 32 bits.", and I can't fully understand it, may
>>> you put it more clearly.
>> It was a mis-statement made while tired. Of course tcg_target_long is
>> defined to int64_t when TCG_TARGET_REG_BITS == 64, so there was no
>> truncation to 32 bits.
>>
>> Have you tested of any of the other embedded targets? You may be able
>> to find the error with one of those easier than finding it emulating
>> full-scale Windows. See the images at the bottom of the QEMU download
>> page.
>
> Hi,
>
> Although I've never hacked on a TCG backend I'd still like to give some
> advice.
>
> >From experience when developing both the CRIS and the MicroBlaze ISA
> translators I very much suggest getting something very stable to work
> in linux-user before going further.
>
> I used GCC's C torture tests and OpenSSL's bignum tests to verify the
> ports. In particular, OpenSSL's bignum tests seem to excersice lot's of
> cornercases.
>
> If you pass those, you've come a long way. In general it's much easier
> to debug a guest testcase (bntest, etc) that fails compared to huge
> propretiary blob that fails (windows).
>
> Just a suggestion, hope it helps.
>
> Cheers,
> Edgar
Hi Edgar,
that was a good suggestion. bntest raises a segmentation fault
(NULL pointer, p == 0, see below) with qemu-x86_64 on a x86_64 host.
Regards,
Stefan
obase=16
ibase=16
test BN_add
print "test BN_add\n"
Program received signal SIGSEGV, Segmentation fault.
tb_alloc_page (tb=0x7ffff3423290, phys_pc=<value optimized out>,
phys_page2=18446744073709551615) at
/home/stefan/src/qemu/repo.or.cz/qemu/ar7/exec.c:1124
1124 tb->page_next[n] = p->first_tb;
(gdb) i s
#0 tb_alloc_page (tb=0x7ffff3423290, phys_pc=<value optimized out>,
phys_page2=18446744073709551615) at
/home/stefan/src/qemu/repo.or.cz/qemu/ar7/exec.c:1124
#1 tb_link_phys (tb=0x7ffff3423290, phys_pc=<value optimized out>,
phys_page2=18446744073709551615) at
/home/stefan/src/qemu/repo.or.cz/qemu/ar7/exec.c:1214
#2 0x000000006001fd5c in tb_gen_code (env=0x7ffff7f97010,
pc=18446744073699066880, cs_base=<value optimized out>, flags=<value
optimized out>, cflags=<value optimized out>) at
/home/stefan/src/qemu/repo.or.cz/qemu/ar7/exec.c:912
#3 0x000000006002241b in tb_find_slow (env1=<value optimized out>) at
/home/stefan/src/qemu/repo.or.cz/qemu/ar7/cpu-exec.c:161
#4 tb_find_fast (env1=<value optimized out>) at
/home/stefan/src/qemu/repo.or.cz/qemu/ar7/cpu-exec.c:182
#5 cpu_x86_exec (env1=<value optimized out>) at
/home/stefan/src/qemu/repo.or.cz/qemu/ar7/cpu-exec.c:574
#6 0x00000000600064c0 in cpu_loop (env=0x7ffff7f97010) at
/home/stefan/src/qemu/repo.or.cz/qemu/ar7/linux-user/main.c:309
#7 0x00000000600076d2 in main (argc=<value optimized out>, argv=<value
optimized out>, envp=<value optimized out>) at
/home/stefan/src/qemu/repo.or.cz/qemu/ar7/linux-user/main.c:3101
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-29 23:04 ` Stefan Weil
@ 2010-01-30 0:38 ` Edgar E. Iglesias
2010-01-30 1:14 ` Laurent Desnogues
1 sibling, 0 replies; 21+ messages in thread
From: Edgar E. Iglesias @ 2010-01-30 0:38 UTC (permalink / raw)
To: Stefan Weil; +Cc: qemu-devel
On Sat, Jan 30, 2010 at 12:04:29AM +0100, Stefan Weil wrote:
> Edgar E. Iglesias schrieb:
> > On Fri, Jan 29, 2010 at 09:04:58AM -0800, Richard Henderson wrote:
> >> On 01/28/2010 05:55 PM, identifier scorpio wrote:
> >>> Your code is more skilled and I learn a lot from it, but I haven't yet
> >>> recognized the key difference between your version and mine. In last
> >>> mail, you've said that "Mainly, tcg_target_long was used places that
> >>> could be holding HOST values, which means that the host values would
> >>> have been truncated to 32 bits.", and I can't fully understand it, may
> >>> you put it more clearly.
> >> It was a mis-statement made while tired. Of course tcg_target_long is
> >> defined to int64_t when TCG_TARGET_REG_BITS == 64, so there was no
> >> truncation to 32 bits.
> >>
> >> Have you tested of any of the other embedded targets? You may be able
> >> to find the error with one of those easier than finding it emulating
> >> full-scale Windows. See the images at the bottom of the QEMU download
> >> page.
> >
> > Hi,
> >
> > Although I've never hacked on a TCG backend I'd still like to give some
> > advice.
> >
> > >From experience when developing both the CRIS and the MicroBlaze ISA
> > translators I very much suggest getting something very stable to work
> > in linux-user before going further.
> >
> > I used GCC's C torture tests and OpenSSL's bignum tests to verify the
> > ports. In particular, OpenSSL's bignum tests seem to excersice lot's of
> > cornercases.
> >
> > If you pass those, you've come a long way. In general it's much easier
> > to debug a guest testcase (bntest, etc) that fails compared to huge
> > propretiary blob that fails (windows).
> >
> > Just a suggestion, hope it helps.
> >
> > Cheers,
> > Edgar
>
>
> Hi Edgar,
>
> that was a good suggestion. bntest raises a segmentation fault
> (NULL pointer, p == 0, see below) with qemu-x86_64 on a x86_64 host.
>
> Regards,
> Stefan
>
> obase=16
> ibase=16
> test BN_add
> print "test BN_add\n"
Hi Stefan,
I didn't expect x86_64 to bug out so fast. But, like I said.
The bignum tests are not a game. That testsuite is a serious
thing to pass. Both CRIS and MicroBlaze pass them both in
linux-user and in system emul. If not let me know.
Cheers,
Edgar
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-29 23:04 ` Stefan Weil
2010-01-30 0:38 ` Edgar E. Iglesias
@ 2010-01-30 1:14 ` Laurent Desnogues
1 sibling, 0 replies; 21+ messages in thread
From: Laurent Desnogues @ 2010-01-30 1:14 UTC (permalink / raw)
To: Stefan Weil; +Cc: Edgar E. Iglesias, qemu-devel
On Sat, Jan 30, 2010 at 12:04 AM, Stefan Weil <weil@mail.berlios.de> wrote:
[...]
>
> that was a good suggestion. bntest raises a segmentation fault
> (NULL pointer, p == 0, see below) with qemu-x86_64 on a x86_64 host.
Compile bntest statically and it should work.
x86_64 user mode is completely broken for dynamically
linked programs.
Laurent
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-29 19:19 ` Richard Henderson
@ 2010-01-30 2:45 ` identifier scorpio
2010-01-31 23:09 ` Richard Henderson
0 siblings, 1 reply; 21+ messages in thread
From: identifier scorpio @ 2010-01-30 2:45 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel
[-- Attachment #1: Type: text/plain, Size: 999 bytes --]
BUG?
In tcg_out_qemu_ld
tcg_out_ld(s, TCG_TYPE_I64, r1, r1,
offsetof(CPUTLBEntry, addend)
- offsetof(CPUTLBEntry, addr_read));
should be modified to
tcg_out_ld(s, TCG_TYPE_I64, r1, r1,
offsetof(CPUTLBEntry, addend));
since the when calling tcg_out_ld, the R1's value is (cpu_env + TLB_entry_offset), which was computed in tcg_out_tlb_cmp()
And the save problem in tcg_out_qemu_ld()
another BUG?
At the end of tcg_out_tlb_cmp(), R0's value is (page# | low bit of VA), if the branch is taken, i.e., TLB miss, R0 will be passed as an argument to helper functions, is it currently holding the correct value? I think at this time R0 should equal to addr_reg.
I'm currently testing your code in my free time.
Dong Weiyu.
___________________________________________________________
好玩贺卡等你发，邮箱贺卡全新上线！
http://card.mail.cn.yahoo.com/
[-- Attachment #2: Type: text/html, Size: 1338 bytes --]
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [Qemu-devel] [PATCH] Porting TCG to alpha platform
2010-01-30 2:45 ` identifier scorpio
@ 2010-01-31 23:09 ` Richard Henderson
0 siblings, 0 replies; 21+ messages in thread
From: Richard Henderson @ 2010-01-31 23:09 UTC (permalink / raw)
To: identifier scorpio; +Cc: qemu-devel
[-- Attachment #1: Type: text/plain, Size: 684 bytes --]
> tcg_out_ld(s, TCG_TYPE_I64, r1, r1, offsetof(CPUTLBEntry, addend) -
> offsetof(CPUTLBEntry, addr_read));
>
> should be modified to
>
> tcg_out_ld(s, TCG_TYPE_I64, r1, r1, offsetof(CPUTLBEntry, addend));
Actually, it should be the entire offset from CPUState. The ADDR_WRITE
offset before was entirely stuffed into the LD offset.
> At the end of tcg_out_tlb_cmp(), R0's value is (page# | low bit of
> VA), if the branch is taken, i.e., TLB miss, R0 will be passed as an
> argument to helper functions, is it currently holding the correct
> value? I think at this time R0 should equal to addr_reg.
You're absolutely right here.
Here's the kind of patch I think will fix it.
r~
[-- Attachment #2: commit-04e0dc2 --]
[-- Type: text/plain, Size: 4403 bytes --]
commit 04e0dc252203bfbc5b02c2d3d8757a005e304a39
Author: Richard Henderson <rth@twiddle.net>
Date: Sun Jan 31 15:06:35 2010 -0800
tcg-alpha: Fix problems in qemu_ld/st.
Copy address to R0 in tcg_out_tlb_cmp, for use in helper path.
Use entire TLB constant offset performing the ADDEND read.
diff --git a/tcg/alpha/tcg-target.c b/tcg/alpha/tcg-target.c
index 519edef..463b7ee 100644
--- a/tcg/alpha/tcg-target.c
+++ b/tcg/alpha/tcg-target.c
@@ -709,9 +709,10 @@ static void *qemu_st_helpers[4] = {
static void tcg_out_tlb_cmp(TCGContext *s, int sizeop, int r0, int r1,
int addr_reg, int label1, long tlb_offset)
{
+ int addrsizeop = TARGET_LONG_BITS == 32 ? 2 : 3;
long val;
- /* Mask the page, plus the low bits of the access, into R0. Note
+ /* Mask the page, plus the low bits of the access, into TMP3. Note
that the low bits are added in order to catch unaligned accesses,
as those bits won't be set in the TLB entry. For 32-bit targets,
force the high bits of the mask to be zero, as the high bits of
@@ -720,7 +721,7 @@ static void tcg_out_tlb_cmp(TCGContext *s, int sizeop, int r0, int r1,
if (TARGET_LONG_BITS == 32) {
val &= 0xffffffffu;
}
- tcg_out_andi(s, addr_reg, val, r0);
+ tcg_out_andi(s, addr_reg, val, TMP_REG3);
/* Compute the index into the TLB into R1. Again, note that the
high bits of a 32-bit address must be cleared. */
@@ -736,11 +737,14 @@ static void tcg_out_tlb_cmp(TCGContext *s, int sizeop, int r0, int r1,
/* Load the word at (R1 + CPU_ENV + TLB_OFFSET). Note that we
arrange for a 32-bit load to be zero-extended. */
tcg_out_fmt_opr(s, INSN_ADDQ, r1, TCG_AREG0, r1);
- tcg_out_ld_sz(s, TARGET_LONG_BITS == 32 ? 2 : 3,
- TMP_REG2, r1, tlb_offset);
+ tcg_out_ld_sz(s, addrsizeop, TMP_REG2, r1, tlb_offset);
- /* Compare R0 with the value loaded from the TLB. */
- tcg_out_brcond(s, TCG_COND_NE, TMP_REG2, r0, 0, label1);
+ /* Copy the original address into R0. This is needed on the
+ slow path through the helper function. */
+ tcg_out_extend(s, addrsizeop, addr_reg, r0);
+
+ /* Compare TMP3 with the value loaded from the TLB. */
+ tcg_out_brcond(s, TCG_COND_NE, TMP_REG2, TMP_REG3, 0, label1);
}
#endif /* SOFTMMU */
@@ -769,20 +773,12 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, int sizeop)
/* TLB Hit. Note that Alpha statically predicts forward branch as
not taken, so arrange the fallthru as the common case.
- ADDR_REG contains the guest address, and R1 contains the pointer
- to TLB_ENTRY.ADDR_READ. We need to load TLB_ENTRY.ADDEND and
- add it to ADDR_REG to get the host address. */
+ R0 contains the guest address, and R1 contains the pointer
+ to CPU_ENV plus the TLB entry offset. */
tcg_out_ld(s, TCG_TYPE_I64, r1, r1,
- offsetof(CPUTLBEntry, addend)
- - offsetof(CPUTLBEntry, addr_read));
-
- if (TARGET_LONG_BITS == 32) {
- tcg_out_extend(s, 2, addr_reg, r0);
- addr_reg = r0;
- }
-
- tcg_out_fmt_opr(s, INSN_ADDQ, addr_reg, r1, r0);
+ offsetof(CPUState, tlb_table[mem_index][0].addend));
+ tcg_out_fmt_opr(s, INSN_ADDQ, r0, r1, r0);
val = 0;
#else
r0 = addr_reg;
@@ -841,20 +837,12 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int sizeop)
/* TLB Hit. Note that Alpha statically predicts forward branch as
not taken, so arrange the fallthru as the common case.
- ADDR_REG contains the guest address, and R1 contains the pointer
- to TLB_ENTRY.ADDR_READ. We need to load TLB_ENTRY.ADDEND and
- add it to ADDR_REG to get the host address. */
+ R0 contains the guest address, and R1 contains the pointer
+ to CPU_ENV plus the TLB entry offset. */
tcg_out_ld(s, TCG_TYPE_I64, r1, r1,
- offsetof(CPUTLBEntry, addend)
- - offsetof(CPUTLBEntry, addr_write));
-
- if (TARGET_LONG_BITS == 32) {
- tcg_out_extend(s, 2, addr_reg, r0);
- addr_reg = r0;
- }
-
- tcg_out_fmt_opr(s, INSN_ADDQ, addr_reg, r1, r0);
+ offsetof(CPUState, tlb_table[mem_index][0].addend));
+ tcg_out_fmt_opr(s, INSN_ADDQ, r0, r1, r0);
val = 0;
#else
r0 = addr_reg;
^ permalink raw reply related [flat|nested] 21+ messages in thread
end of thread, other threads:[~2010-01-31 23:09 UTC | newest]
Thread overview: 21+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2010-01-20 17:19 [Qemu-devel] [PATCH] Porting TCG to alpha platform identifier scorpio
2010-01-20 21:26 ` Richard Henderson
-- strict thread matches above, loose matches on Subject: below --
2010-01-22 15:47 identifier scorpio
2010-01-22 18:00 ` Richard Henderson
2010-01-26 1:19 ` Richard Henderson
2010-01-29 1:55 ` identifier scorpio
2010-01-29 17:04 ` Richard Henderson
2010-01-29 21:38 ` Edgar E. Iglesias
2010-01-29 23:04 ` Stefan Weil
2010-01-30 0:38 ` Edgar E. Iglesias
2010-01-30 1:14 ` Laurent Desnogues
2010-01-29 17:37 ` Richard Henderson
2010-01-29 19:19 ` Richard Henderson
2010-01-30 2:45 ` identifier scorpio
2010-01-31 23:09 ` Richard Henderson
2010-01-21 3:42 identifier scorpio
2010-01-21 18:18 ` Stefan Weil
2010-01-19 8:47 identifier scorpio
2010-01-19 20:18 ` Richard Henderson
2010-01-19 21:35 ` malc
2010-01-19 21:42 ` Stefan Weil
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).