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target/i386: Introduce DISAS_EOB*

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Add a few DISAS_TARGET_* aliases to reduce the number of
calls to gen_eob() and gen_eob_inhibit_irq().  So far,
only update i386_tr_translate_insn for exiting the block
because of single-step or previous inhibit irq.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20221001140935.465607-8-richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Richard Henderson 2022-10-01 07:09:16 -07:00 committed by Paolo Bonzini
parent 09e99df4d5
commit 200ef60399
1 changed files with 21 additions and 2 deletions
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23
target/i386/tcg/translate.c
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@ -132,6 +132,10 @@ typedef struct DisasContext {
TCGOp *prev_insn_end; TCGOp *prev_insn_end;
} DisasContext; } DisasContext;
#define DISAS_EOB_ONLY DISAS_TARGET_0
#define DISAS_EOB_NEXT DISAS_TARGET_1
#define DISAS_EOB_INHIBIT_IRQ DISAS_TARGET_2
/* The environment in which user-only runs is constrained. */ /* The environment in which user-only runs is constrained. */
#ifdef CONFIG_USER_ONLY #ifdef CONFIG_USER_ONLY
#define PE(S) true #define PE(S) true
@ -8849,7 +8853,7 @@ static void i386_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu)
* the flag and abort the translation to give the irqs a * the flag and abort the translation to give the irqs a
* chance to happen. * chance to happen.
*/ */
dc->base.is_jmp = DISAS_TOO_MANY; dc->base.is_jmp = DISAS_EOB_NEXT;
} else if (!is_same_page(&dc->base, pc_next)) { } else if (!is_same_page(&dc->base, pc_next)) {
dc->base.is_jmp = DISAS_TOO_MANY; dc->base.is_jmp = DISAS_TOO_MANY;
} }
@ -8861,9 +8865,24 @@ static void i386_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu)
{ {
DisasContext *dc = container_of(dcbase, DisasContext, base); DisasContext *dc = container_of(dcbase, DisasContext, base);
if (dc->base.is_jmp == DISAS_TOO_MANY) { switch (dc->base.is_jmp) {
case DISAS_NORETURN:
break;
case DISAS_TOO_MANY:
case DISAS_EOB_NEXT:
gen_update_cc_op(dc);
gen_update_eip_cur(dc); gen_update_eip_cur(dc);
/* fall through */
case DISAS_EOB_ONLY:
gen_eob(dc); gen_eob(dc);
break;
case DISAS_EOB_INHIBIT_IRQ:
gen_update_cc_op(dc);
gen_update_eip_cur(dc);
gen_eob_inhibit_irq(dc, true);
break;
default:
g_assert_not_reached();
} }
} }