From 719f66a770f18c07a14935e418e339b462571f36 Mon Sep 17 00:00:00 2001 From: Blue Swirl Date: Sun, 3 May 2009 18:51:27 +0000 Subject: [PATCH] Optimize cmp x, 0 case Signed-off-by: Blue Swirl --- target-sparc/translate.c | 33 +++++++++++++++++++-------------- 1 file changed, 19 insertions(+), 14 deletions(-) diff --git a/target-sparc/translate.c b/target-sparc/translate.c index f095b9bc54..ae93614cc3 100644 --- a/target-sparc/translate.c +++ b/target-sparc/translate.c @@ -431,6 +431,18 @@ static inline void gen_cc_V_tag(TCGv src1, TCGv src2) gen_set_label(l1); } +static inline void gen_op_logic_cc(TCGv dst) +{ + tcg_gen_mov_tl(cpu_cc_dst, dst); + + gen_cc_clear_icc(); + gen_cc_NZ_icc(cpu_cc_dst); +#ifdef TARGET_SPARC64 + gen_cc_clear_xcc(); + gen_cc_NZ_xcc(cpu_cc_dst); +#endif +} + static inline void gen_tag_tv(TCGv src1, TCGv src2) { int l1; @@ -669,8 +681,13 @@ static inline void gen_op_subi_cc(TCGv dst, TCGv src1, target_long src2) { tcg_gen_mov_tl(cpu_cc_src, src1); tcg_gen_movi_tl(cpu_cc_src2, src2); - tcg_gen_subi_tl(cpu_cc_dst, cpu_cc_src, src2); - gen_op_sub_cc2(dst); + if (src2 == 0) { + tcg_gen_mov_tl(dst, src1); + gen_op_logic_cc(dst); + } else { + tcg_gen_subi_tl(cpu_cc_dst, cpu_cc_src, src2); + gen_op_sub_cc2(dst); + } } static inline void gen_op_sub_cc(TCGv dst, TCGv src1, TCGv src2) @@ -906,18 +923,6 @@ static inline void gen_op_div_cc(TCGv dst) gen_set_label(l1); } -static inline void gen_op_logic_cc(TCGv dst) -{ - tcg_gen_mov_tl(cpu_cc_dst, dst); - - gen_cc_clear_icc(); - gen_cc_NZ_icc(cpu_cc_dst); -#ifdef TARGET_SPARC64 - gen_cc_clear_xcc(); - gen_cc_NZ_xcc(cpu_cc_dst); -#endif -} - // 1 static inline void gen_op_eval_ba(TCGv dst) {