diff mbox

[08/12] tcg-sparc: Optimize setcond2 equality compare with 0.

Message ID 1348710942-3040-9-git-send-email-rth@twiddle.net
State New
Headers show

Commit Message

Richard Henderson Sept. 27, 2012, 1:55 a.m. UTC 
Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 tcg/sparc/tcg-target.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)
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Patch

diff --git a/tcg/sparc/tcg-target.c b/tcg/sparc/tcg-target.c
index b1f3eaf..1618996 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;