From 1608ecca95188dcf4f78072be48f41dbe2062b25 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 5 Oct 2012 18:42:59 +0200 Subject: target-i386: add helper functions to get other flags Introduce new functions to extract PF, SF, OF, ZF in addition to CF. These provide single entry points for optimizing accesses to a single flag. Reviewed-by: Blue Swirl Signed-off-by: Paolo Bonzini Signed-off-by: Richard Henderson --- target-i386/translate.c | 48 ++++++++++++++++++++++++++++++++++++------------ 1 file changed, 36 insertions(+), 12 deletions(-) (limited to 'target-i386') diff --git a/target-i386/translate.c b/target-i386/translate.c index 9dd3081a8f..9bbe969cd6 100644 --- a/target-i386/translate.c +++ b/target-i386/translate.c @@ -857,21 +857,49 @@ static void gen_compute_eflags(DisasContext *s, TCGv reg) tcg_gen_extu_i32_tl(reg, cpu_tmp2_i32); } +/* compute eflags.P to reg */ +static void gen_compute_eflags_p(DisasContext *s, TCGv reg) +{ + gen_compute_eflags(s, reg); + tcg_gen_shri_tl(reg, reg, 2); + tcg_gen_andi_tl(reg, reg, 1); +} + +/* compute eflags.S to reg */ +static void gen_compute_eflags_s(DisasContext *s, TCGv reg) +{ + gen_compute_eflags(s, reg); + tcg_gen_shri_tl(reg, reg, 7); + tcg_gen_andi_tl(reg, reg, 1); +} + +/* compute eflags.O to reg */ +static void gen_compute_eflags_o(DisasContext *s, TCGv reg) +{ + gen_compute_eflags(s, reg); + tcg_gen_shri_tl(reg, reg, 11); + tcg_gen_andi_tl(reg, reg, 1); +} + +/* compute eflags.Z to reg */ +static void gen_compute_eflags_z(DisasContext *s, TCGv reg) +{ + gen_compute_eflags(s, reg); + tcg_gen_shri_tl(reg, reg, 6); + tcg_gen_andi_tl(reg, reg, 1); +} + static inline void gen_setcc_slow_T0(DisasContext *s, int jcc_op) { switch(jcc_op) { case JCC_O: - gen_compute_eflags(s, cpu_T[0]); - tcg_gen_shri_tl(cpu_T[0], cpu_T[0], 11); - tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 1); + gen_compute_eflags_o(s, cpu_T[0]); break; case JCC_B: gen_compute_eflags_c(s, cpu_T[0]); break; case JCC_Z: - gen_compute_eflags(s, cpu_T[0]); - tcg_gen_shri_tl(cpu_T[0], cpu_T[0], 6); - tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 1); + gen_compute_eflags_z(s, cpu_T[0]); break; case JCC_BE: gen_compute_eflags(s, cpu_tmp0); @@ -880,14 +908,10 @@ static inline void gen_setcc_slow_T0(DisasContext *s, int jcc_op) tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 1); break; case JCC_S: - gen_compute_eflags(s, cpu_T[0]); - tcg_gen_shri_tl(cpu_T[0], cpu_T[0], 7); - tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 1); + gen_compute_eflags_s(s, cpu_T[0]); break; case JCC_P: - gen_compute_eflags(s, cpu_T[0]); - tcg_gen_shri_tl(cpu_T[0], cpu_T[0], 2); - tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 1); + gen_compute_eflags_p(s, cpu_T[0]); break; case JCC_L: gen_compute_eflags(s, cpu_tmp0); -- cgit v1.2.3