From 7089442cb6214a46b1476d18d068f8b2972d1b22 Mon Sep 17 00:00:00 2001
From: blueswir1 <blueswir1@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Wed, 20 Feb 2008 18:01:23 +0000
Subject: [PATCH]  Fix andi, optimize addi and subi zero cases

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3985 c046a42c-6fe2-441c-8c8c-71466251a162
---
 tcg/tcg-op.h | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h
index 82aebb3219..be504643c3 100644
--- a/tcg/tcg-op.h
+++ b/tcg/tcg-op.h
@@ -252,7 +252,12 @@ static inline void tcg_gen_add_i32(TCGv ret, TCGv arg1, TCGv arg2)
 
 static inline void tcg_gen_addi_i32(TCGv ret, TCGv arg1, int32_t arg2)
 {
-    tcg_gen_add_i32(ret, arg1, tcg_const_i32(arg2));
+    /* some cases can be optimized here */
+    if (arg2 == 0) {
+        tcg_gen_mov_i32(ret, arg1);
+    } else {
+        tcg_gen_add_i32(ret, arg1, tcg_const_i32(arg2));
+    }
 }
 
 static inline void tcg_gen_sub_i32(TCGv ret, TCGv arg1, TCGv arg2)
@@ -262,7 +267,12 @@ static inline void tcg_gen_sub_i32(TCGv ret, TCGv arg1, TCGv arg2)
 
 static inline void tcg_gen_subi_i32(TCGv ret, TCGv arg1, int32_t arg2)
 {
-    tcg_gen_sub_i32(ret, arg1, tcg_const_i32(arg2));
+    /* some cases can be optimized here */
+    if (arg2 == 0) {
+        tcg_gen_mov_i32(ret, arg1);
+    } else {
+        tcg_gen_sub_i32(ret, arg1, tcg_const_i32(arg2));
+    }
 }
 
 static inline void tcg_gen_and_i32(TCGv ret, TCGv arg1, TCGv arg2)
@@ -291,7 +301,7 @@ static inline void tcg_gen_ori_i32(TCGv ret, TCGv arg1, int32_t arg2)
 {
     /* some cases can be optimized here */
     if (arg2 == 0xffffffff) {
-        tcg_gen_movi_i32(ret, 0);
+        tcg_gen_movi_i32(ret, 0xffffffff);
     } else if (arg2 == 0) {
         tcg_gen_mov_i32(ret, arg1);
     } else {
-- 
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