[PATCH 13/17] target/i386: add 80-87, 90-97 opcodes

[Paolo Bonzini <pbonzini@redhat.com>]

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/tcg/decode-new.c.inc | 30 ++++++++++++++++++++++++++++++
 target/i386/tcg/emit.c.inc       | 27 +++++++++++++++++++++++++++
 2 files changed, 57 insertions(+)

diff --git a/target/i386/tcg/decode-new.c.inc b/target/i386/tcg/decode-new.c.inc
index 6892000aaf..07a2aea540 100644
--- a/target/i386/tcg/decode-new.c.inc
+++ b/target/i386/tcg/decode-new.c.inc
@@ -476,6 +476,20 @@ static void decode_group_0x63(DisasContext *s, CPUX86State *env, X86OpEntry *ent
     }
 }
 
+static void decode_group_1(DisasContext *s, CPUX86State *env, X86OpEntry *entry, uint8_t *b)
+{
+    static X86GenFunc group1_gen[8] = {
+        gen_ADD, gen_OR, gen_ADC, gen_SBB, gen_AND, gen_SUB, gen_XOR, gen_SUB,
+    };
+    int op = (get_modrm(s, env) >> 3) & 7;
+    entry->gen = group1_gen[op];
+
+    if (op == 7) {
+        /* CMP */
+        entry->special = X86_SPECIAL_NoWriteback;
+    }
+}
+
 static X86OpEntry A2_00_F7[16][8] = {
     {
         X86_OP_ENTRY2(ADD, E,b, G,b),
@@ -558,8 +572,24 @@ static X86OpEntry A2_00_F7[16][8] = {
         X86_OP_ENTRYr(Jcc, J,b),
     },
     {
+        X86_OP_GROUP2(1, E,b, I,b),
+        X86_OP_GROUP2(1, E,v, I,z),
+        X86_OP_GROUP2(1, E,b, I,b, i64),
+        X86_OP_GROUP2(1, E,v, I,b),
+        X86_OP_ENTRY2(AND, E,b, G,b, nowb),
+        X86_OP_ENTRY2(AND, E,v, G,v, nowb),
+        X86_OP_ENTRY2(XCHG, E,b, G,b, xchg),
+        X86_OP_ENTRY2(XCHG, E,v, G,v, xchg),
     },
     {
+        X86_OP_ENTRY2(XCHG, 0,v, LoBits,v),
+        X86_OP_ENTRY2(XCHG, 0,v, LoBits,v),
+        X86_OP_ENTRY2(XCHG, 0,v, LoBits,v),
+        X86_OP_ENTRY2(XCHG, 0,v, LoBits,v),
+        X86_OP_ENTRY2(XCHG, 0,v, LoBits,v),
+        X86_OP_ENTRY2(XCHG, 0,v, LoBits,v),
+        X86_OP_ENTRY2(XCHG, 0,v, LoBits,v),
+        X86_OP_ENTRY2(XCHG, 0,v, LoBits,v),
     },
     {
     },
diff --git a/target/i386/tcg/emit.c.inc b/target/i386/tcg/emit.c.inc
index ae82ebd8c9..80f6541464 100644
--- a/target/i386/tcg/emit.c.inc
+++ b/target/i386/tcg/emit.c.inc
@@ -325,6 +325,7 @@ static void gen_MOV(DisasContext *s, CPUX86State *env, X86DecodedInsn *decode)
 {
     /* nothing to do! */
 }
+#define gen_NOP gen_MOV
 
 static void gen_MOVSXD(DisasContext *s, CPUX86State *env, X86DecodedInsn *decode)
 {
@@ -391,6 +392,32 @@ static void gen_SUB(DisasContext *s, CPUX86State *env, X86DecodedInsn *decode)
     gen_alu_op(s, OP_SUBL, decode->op[0].ot);
 }
 
+static void gen_XCHG(DisasContext *s, CPUX86State *env, X86DecodedInsn *decode)
+{
+    if (decode->b == 0x90 && !REX_B(s)) {
+        if (s->prefix & PREFIX_REPZ) {
+            gen_update_cc_op(s);
+            gen_jmp_im(s, s->pc_start - s->cs_base);
+            gen_helper_pause(cpu_env, tcg_const_i32(s->pc - s->pc_start));
+            s->base.is_jmp = DISAS_NORETURN;
+        }
+        /* No writeback.  */
+        decode->op[0].alu_op_type = X86_ALU_SKIP;
+        return;
+    }
+
+    if (s->prefix & PREFIX_LOCK) {
+        tcg_gen_atomic_xchg_tl(s->T0, s->A0, s->T1,
+                               s->mem_index, decode->op[0].ot | MO_LE);
+        /* now store old value into register operand */
+        gen_op_mov_reg_v(s, decode->op[2].ot, decode->op[2].n, s->T0);
+    } else {
+        /* move destination value into source operand, source preserved in T1 */
+        gen_op_mov_reg_v(s, decode->op[2].ot, decode->op[2].n, s->T0);
+        tcg_gen_mov_tl(s->T0, s->T1);
+    }
+}
+
 static void gen_XOR(DisasContext *s, CPUX86State *env, X86DecodedInsn *decode)
 {
     /* special case XOR reg, reg */
-- 
2.37.1