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Diffstat (limited to 'target-i386/translate.c')
-rw-r--r--target-i386/translate.c37
1 files changed, 31 insertions, 6 deletions
diff --git a/target-i386/translate.c b/target-i386/translate.c
index a767b50b57..026fbd6852 100644
--- a/target-i386/translate.c
+++ b/target-i386/translate.c
@@ -900,9 +900,22 @@ static void gen_compute_eflags_p(DisasContext *s, TCGv reg)
/* compute eflags.S to reg */
static void gen_compute_eflags_s(DisasContext *s, TCGv reg)
{
- gen_compute_eflags(s);
- tcg_gen_shri_tl(reg, cpu_cc_src, 7);
- tcg_gen_andi_tl(reg, reg, 1);
+ switch (s->cc_op) {
+ case CC_OP_DYNAMIC:
+ gen_compute_eflags(s);
+ /* FALLTHRU */
+ case CC_OP_EFLAGS:
+ tcg_gen_shri_tl(reg, cpu_cc_src, 7);
+ tcg_gen_andi_tl(reg, reg, 1);
+ break;
+ default:
+ {
+ int size = (s->cc_op - CC_OP_ADDB) & 3;
+ TCGv t0 = gen_ext_tl(reg, cpu_cc_dst, size, true);
+ tcg_gen_setcondi_tl(TCG_COND_LT, reg, t0, 0);
+ }
+ break;
+ }
}
/* compute eflags.O to reg */
@@ -916,9 +929,21 @@ static void gen_compute_eflags_o(DisasContext *s, TCGv reg)
/* compute eflags.Z to reg */
static void gen_compute_eflags_z(DisasContext *s, TCGv reg)
{
- gen_compute_eflags(s);
- tcg_gen_shri_tl(reg, cpu_cc_src, 6);
- tcg_gen_andi_tl(reg, reg, 1);
+ switch (s->cc_op) {
+ case CC_OP_DYNAMIC:
+ gen_compute_eflags(s);
+ /* FALLTHRU */
+ case CC_OP_EFLAGS:
+ tcg_gen_shri_tl(reg, cpu_cc_src, 6);
+ tcg_gen_andi_tl(reg, reg, 1);
+ break;
+ default:
+ {
+ int size = (s->cc_op - CC_OP_ADDB) & 3;
+ TCGv t0 = gen_ext_tl(reg, cpu_cc_dst, size, false);
+ tcg_gen_setcondi_tl(TCG_COND_EQ, reg, t0, 0);
+ }
+ }
}
static inline void gen_setcc_slow_T0(DisasContext *s, int jcc_op)