Patchwork [09/13] tcg-sparc: Optimize setcond2 equality compare with 0.

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Submitter Richard Henderson
Date Oct. 10, 2012, 4:02 p.m.
Message ID <1349884967-4608-10-git-send-email-rth@twiddle.net>
Download mbox | patch
Permalink /patch/190716/
State New
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Comments

Richard Henderson - Oct. 10, 2012, 4:02 p.m.
Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 tcg/sparc/tcg-target.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

Patch

diff --git a/tcg/sparc/tcg-target.c b/tcg/sparc/tcg-target.c
index f7d52d6..9c87cb6 100644
--- a/tcg/sparc/tcg-target.c
+++ b/tcg/sparc/tcg-target.c
@@ -693,9 +693,18 @@  static void tcg_out_setcond2_i32(TCGContext *s, TCGCond cond, TCGArg ret,
     switch (cond) {
     case TCG_COND_EQ:
     case TCG_COND_NE:
-        tcg_out_setcond_i32(s, cond, tmp, al, bl, blconst);
-        tcg_out_cmp(s, ah, bh, bhconst);
-        tcg_out_mov(s, TCG_TYPE_I32, ret, tmp);
+        if (bl == 0 && bh == 0) {
+            if (cond == TCG_COND_EQ) {
+                tcg_out_arith(s, TCG_REG_G0, al, ah, ARITH_ORCC);
+                tcg_out_movi(s, TCG_TYPE_I32, ret, 1);
+            } else {
+                tcg_out_arith(s, ret, al, ah, ARITH_ORCC);
+            }
+        } else {
+            tcg_out_setcond_i32(s, cond, tmp, al, bl, blconst);
+            tcg_out_cmp(s, ah, bh, bhconst);
+            tcg_out_mov(s, TCG_TYPE_I32, ret, tmp);
+        }
         tcg_out_movcc(s, TCG_COND_NE, MOVCC_ICC, ret, cond == TCG_COND_NE, 1);
         break;