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authorBlue Swirl <blauwirbel@gmail.com>2009-05-03 18:51:27 +0000
committerBlue Swirl <blauwirbel@gmail.com>2009-05-03 18:51:27 +0000
commit719f66a770f18c07a14935e418e339b462571f36 (patch)
tree7554bafaff1d156efb4875cefb3c9cd32143d2d4 /target-sparc/translate.c
parentdc1a6971e34feb15543134df8bcd9e393ed66c86 (diff)
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Optimize cmp x, 0 case
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'target-sparc/translate.c')
-rw-r--r--target-sparc/translate.c33
1 files changed, 19 insertions, 14 deletions
diff --git a/target-sparc/translate.c b/target-sparc/translate.c
index f095b9b..ae93614 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)
{