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accel/tcg: Move can_do_io to CPUNegativeOffsetState

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Minimize the displacement to can_do_io, since it may
be touched at the start of each TranslationBlock.
It fits into other padding within the substructure.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-09-15 15:41:39 -07:00
parent e62de98111
commit 464dacf609
14 changed files with 21 additions and 21 deletions
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10
accel/tcg/translator.c
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@ -20,9 +20,11 @@ static void set_can_do_io(DisasContextBase *db, bool val)
{
if (db->saved_can_do_io != val) {
db->saved_can_do_io = val;
tcg_gen_st_i32(tcg_constant_i32(val), cpu_env,
offsetof(ArchCPU, parent_obj.can_do_io) -
offsetof(ArchCPU, env));
QEMU_BUILD_BUG_ON(sizeof_field(CPUState, neg.can_do_io) != 1);
tcg_gen_st8_i32(tcg_constant_i32(val), cpu_env,
offsetof(ArchCPU, parent_obj.neg.can_do_io) -
offsetof(ArchCPU, env));
}
}
@ -83,7 +85,7 @@ static TCGOp *gen_tb_start(DisasContextBase *db, uint32_t cflags)
}
/*
* cpu->can_do_io is set automatically here at the beginning of
* cpu->neg.can_do_io is set automatically here at the beginning of
* each translation block. The cost is minimal, plus it would be
* very easy to forget doing it in the translator.
*/