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[PATCH v3 12/13] accel/tcg: Hoist tb_cflags to a local in translator_loo
From: |
Richard Henderson |
Subject: |
[PATCH v3 12/13] accel/tcg: Hoist tb_cflags to a local in translator_loop |
Date: |
Sat, 17 Jul 2021 15:18:50 -0700 |
The access internal to tb_cflags() is atomic.
Avoid re-reading it as such for the multiple uses.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
accel/tcg/translator.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/accel/tcg/translator.c b/accel/tcg/translator.c
index 1c44d096d8..449159a27c 100644
--- a/accel/tcg/translator.c
+++ b/accel/tcg/translator.c
@@ -50,6 +50,7 @@ bool translator_use_goto_tb(DisasContextBase *db,
target_ulong dest)
void translator_loop(const TranslatorOps *ops, DisasContextBase *db,
CPUState *cpu, TranslationBlock *tb, int max_insns)
{
+ uint32_t cflags = tb_cflags(tb);
bool plugin_enabled;
/* Initialize DisasContext */
@@ -72,8 +73,7 @@ void translator_loop(const TranslatorOps *ops,
DisasContextBase *db,
ops->tb_start(db, cpu);
tcg_debug_assert(db->is_jmp == DISAS_NEXT); /* no early exit */
- plugin_enabled = plugin_gen_tb_start(cpu, tb,
- tb_cflags(db->tb) & CF_MEMI_ONLY);
+ plugin_enabled = plugin_gen_tb_start(cpu, tb, cflags & CF_MEMI_ONLY);
while (true) {
db->num_insns++;
@@ -125,14 +125,13 @@ void translator_loop(const TranslatorOps *ops,
DisasContextBase *db,
update db->pc_next and db->is_jmp to indicate what should be
done next -- either exiting this loop or locate the start of
the next instruction. */
- if (db->num_insns == db->max_insns
- && (tb_cflags(db->tb) & CF_LAST_IO)) {
+ if (db->num_insns == db->max_insns && (cflags & CF_LAST_IO)) {
/* Accept I/O on the last instruction. */
gen_io_start();
ops->translate_insn(db, cpu);
} else {
/* we should only see CF_MEMI_ONLY for io_recompile */
- tcg_debug_assert(!(tb_cflags(db->tb) & CF_MEMI_ONLY));
+ tcg_debug_assert(!(cflags & CF_MEMI_ONLY));
ops->translate_insn(db, cpu);
}
--
2.25.1
- [PATCH v3 09/13] target/mips: Reduce mips_tr_breakpoint_check pc advance to 2, (continued)
- [PATCH v3 09/13] target/mips: Reduce mips_tr_breakpoint_check pc advance to 2, Richard Henderson, 2021/07/17
- [PATCH v3 07/13] accel/tcg: Move cflags lookup into tb_find, Richard Henderson, 2021/07/17
- [PATCH v3 02/13] accel/tcg: Move curr_cflags into cpu-exec.c, Richard Henderson, 2021/07/17
- [PATCH v3 06/13] accel/tcg: Use CF_NO_GOTO_{TB, PTR} in cpu_exec_step_atomic, Richard Henderson, 2021/07/17
- [PATCH v3 08/13] target/avr: Advance pc in avr_tr_breakpoint_check, Richard Henderson, 2021/07/17
- [PATCH v3 12/13] accel/tcg: Hoist tb_cflags to a local in translator_loop,
Richard Henderson <=
- [PATCH v3 03/13] accel/tcg: Add CF_NO_GOTO_TB and CF_NO_GOTO_PTR, Richard Henderson, 2021/07/17
- [PATCH v3 13/13] accel/tcg: Encode breakpoint info into tb->cflags, Richard Henderson, 2021/07/17
- [PATCH v3 11/13] accel/tcg: Adjust interface of TranslatorOps.breakpoint_check, Richard Henderson, 2021/07/17
- [PATCH v3 10/13] target/riscv: Reduce riscv_tr_breakpoint_check pc advance to 2, Richard Henderson, 2021/07/17