From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PULL v3 04/38] tcg/ppc: Use ADDPCIS in tcg_out_tb_start
Date: Mon, 23 Oct 2023 11:12:55 -0700 [thread overview]
Message-ID: <20231023181329.171490-5-richard.henderson@linaro.org> (raw)
In-Reply-To: <20231023181329.171490-1-richard.henderson@linaro.org>
With ISA v3.0, we can use ADDPCIS instead of BCL+MFLR to load NIA.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/ppc/tcg-target.c.inc | 25 ++++++++++++++++++++++---
1 file changed, 22 insertions(+), 3 deletions(-)
diff --git a/tcg/ppc/tcg-target.c.inc b/tcg/ppc/tcg-target.c.inc
index aafbf2db4e..b0b8cd2390 100644
--- a/tcg/ppc/tcg-target.c.inc
+++ b/tcg/ppc/tcg-target.c.inc
@@ -362,6 +362,7 @@ static bool tcg_target_const_match(int64_t val, TCGType type, int ct, int vece)
#define CRNAND XO19(225)
#define CROR XO19(449)
#define CRNOR XO19( 33)
+#define ADDPCIS XO19( 2)
#define EXTSB XO31(954)
#define EXTSH XO31(922)
@@ -859,6 +860,19 @@ static inline void tcg_out_sari64(TCGContext *s, TCGReg dst, TCGReg src, int c)
tcg_out32(s, SRADI | RA(dst) | RS(src) | SH(c & 0x1f) | ((c >> 4) & 2));
}
+static void tcg_out_addpcis(TCGContext *s, TCGReg dst, intptr_t imm)
+{
+ uint32_t d0, d1, d2;
+
+ tcg_debug_assert((imm & 0xffff) == 0);
+ tcg_debug_assert(imm == (int32_t)imm);
+
+ d2 = extract32(imm, 16, 1);
+ d1 = extract32(imm, 17, 5);
+ d0 = extract32(imm, 22, 10);
+ tcg_out32(s, ADDPCIS | RT(dst) | (d1 << 16) | (d0 << 6) | d2);
+}
+
static void tcg_out_bswap16(TCGContext *s, TCGReg dst, TCGReg src, int flags)
{
TCGReg tmp = dst == src ? TCG_REG_R0 : dst;
@@ -2534,9 +2548,14 @@ static void tcg_out_tb_start(TCGContext *s)
{
/* Load TCG_REG_TB. */
if (USE_REG_TB) {
- /* bcl 20,31,$+4 (preferred form for getting nia) */
- tcg_out32(s, BC | BO_ALWAYS | BI(7, CR_SO) | 0x4 | LK);
- tcg_out32(s, MFSPR | RT(TCG_REG_TB) | LR);
+ if (have_isa_3_00) {
+ /* lnia REG_TB */
+ tcg_out_addpcis(s, TCG_REG_TB, 0);
+ } else {
+ /* bcl 20,31,$+4 (preferred form for getting nia) */
+ tcg_out32(s, BC | BO_ALWAYS | BI(7, CR_SO) | 0x4 | LK);
+ tcg_out32(s, MFSPR | RT(TCG_REG_TB) | LR);
+ }
}
}
--
2.34.1
next prev parent reply other threads:[~2023-10-23 18:18 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-23 18:12 [PULL v3 00/38] tcg patch queue Richard Henderson
2023-10-23 18:12 ` [PULL v3 01/38] tcg/ppc: Untabify tcg-target.c.inc Richard Henderson
2023-10-23 18:12 ` [PULL v3 02/38] tcg/ppc: Enable direct branching tcg_out_goto_tb with TCG_REG_TB Richard Henderson
2023-10-23 18:12 ` [PULL v3 03/38] tcg/ppc: Reinterpret tb-relative to TB+4 Richard Henderson
2023-10-23 18:12 ` Richard Henderson [this message]
2023-10-23 18:12 ` [PULL v3 05/38] tcg/ppc: Use ADDPCIS in tcg_out_movi_int Richard Henderson
2023-10-23 18:12 ` [PULL v3 06/38] tcg/ppc: Use ADDPCIS for the constant pool Richard Henderson
2023-10-23 18:12 ` [PULL v3 07/38] tcg/ppc: Use ADDPCIS in tcg_out_goto_tb Richard Henderson
2023-10-23 18:12 ` [PULL v3 08/38] tcg/ppc: Use PADDI in tcg_out_movi Richard Henderson
2023-10-23 18:13 ` [PULL v3 09/38] tcg/ppc: Use prefixed instructions in tcg_out_mem_long Richard Henderson
2023-10-23 18:13 ` [PULL v3 10/38] tcg/ppc: Use PLD in tcg_out_movi for constant pool Richard Henderson
2023-10-23 18:13 ` [PULL v3 11/38] tcg/ppc: Use prefixed instructions in tcg_out_dupi_vec Richard Henderson
2023-10-23 18:13 ` [PULL v3 12/38] tcg/ppc: Use PLD in tcg_out_goto_tb Richard Henderson
2023-10-23 18:13 ` [PULL v3 13/38] tcg/ppc: Disable TCG_REG_TB for Power9/Power10 Richard Henderson
2023-10-23 18:13 ` [PULL v3 14/38] tcg: Introduce tcg_use_softmmu Richard Henderson
2023-10-23 18:13 ` [PULL v3 15/38] tcg: Provide guest_base fallback for system mode Richard Henderson
2023-10-23 18:13 ` [PULL v3 16/38] tcg/arm: Use tcg_use_softmmu Richard Henderson
2023-10-23 18:13 ` [PULL v3 17/38] tcg/aarch64: " Richard Henderson
2023-10-23 18:13 ` [PULL v3 18/38] tcg/i386: " Richard Henderson
2023-10-23 18:13 ` [PULL v3 19/38] tcg/loongarch64: " Richard Henderson
2023-10-23 18:13 ` [PULL v3 20/38] tcg/mips: " Richard Henderson
2023-10-23 18:13 ` [PULL v3 21/38] tcg/ppc: " Richard Henderson
2023-10-23 18:13 ` [PULL v3 22/38] tcg/riscv: Do not reserve TCG_GUEST_BASE_REG for guest_base zero Richard Henderson
2023-10-23 18:13 ` [PULL v3 23/38] tcg/riscv: Use tcg_use_softmmu Richard Henderson
2023-10-23 18:13 ` [PULL v3 24/38] tcg/s390x: " Richard Henderson
2023-10-23 18:13 ` [PULL v3 25/38] tcg: drop unused tcg_temp_free define Richard Henderson
2023-10-23 18:13 ` [PULL v3 26/38] tcg: Use constant zero when expanding with divu2 Richard Henderson
2023-10-23 18:13 ` [PULL v3 27/38] tcg: Optimize past conditional branches Richard Henderson
2023-10-23 18:13 ` [PULL v3 28/38] tcg: Add tcg_gen_{ld,st}_i128 Richard Henderson
2023-10-23 18:13 ` [PULL v3 29/38] target/i386: Use i128 for 128 and 256-bit loads and stores Richard Henderson
2023-10-23 18:13 ` [PULL v3 30/38] tcg: add negsetcondi Richard Henderson
2023-10-23 18:13 ` [PULL v3 31/38] tcg: Export tcg_gen_ext_{i32,i64,tl} Richard Henderson
2023-10-23 18:13 ` [PULL v3 32/38] tcg: Define MO_TL Richard Henderson
2023-10-23 18:13 ` [PULL v3 33/38] target/arm: Use tcg_gen_ext_i64 Richard Henderson
2023-10-23 18:13 ` [PULL v3 34/38] target/i386: Use tcg_gen_ext_tl Richard Henderson
2023-10-23 18:13 ` [PULL v3 35/38] target/m68k: Use tcg_gen_ext_i32 Richard Henderson
2023-10-23 18:13 ` [PULL v3 36/38] target/rx: " Richard Henderson
2023-10-23 18:13 ` [PULL v3 37/38] target/tricore: Use tcg_gen_*extract_tl Richard Henderson
2023-10-23 18:13 ` [PULL v3 38/38] target/xtensa: Use tcg_gen_sextract_i32 Richard Henderson
2023-10-24 1:15 ` [PULL v3 00/38] tcg patch queue Stefan Hajnoczi
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