[Qemu-devel] [4525] small shift opts

[Qemu-devel] [4525] small shift opts

[Fabrice Bellard]

Revision: 4525
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=4525
Author:   bellard
Date:     2008-05-22 13:25:14 +0000 (Thu, 22 May 2008)

Log Message:
-----------
small shift opts

Modified Paths:
--------------
    trunk/tcg/tcg-op.h

Modified: trunk/tcg/tcg-op.h
===================================================================
--- trunk/tcg/tcg-op.h	2008-05-22 12:36:31 UTC (rev 4524)
+++ trunk/tcg/tcg-op.h	2008-05-22 13:25:14 UTC (rev 4525)
@@ -404,7 +404,11 @@
 
 static inline void tcg_gen_shli_i32(TCGv ret, TCGv arg1, int32_t arg2)
 {
-    tcg_gen_shl_i32(ret, arg1, tcg_const_i32(arg2));
+    if (arg2 == 0) {
+        tcg_gen_mov_i32(ret, arg1);
+    } else {
+        tcg_gen_shl_i32(ret, arg1, tcg_const_i32(arg2));
+    }
 }
 
 static inline void tcg_gen_shr_i32(TCGv ret, TCGv arg1, TCGv arg2)
@@ -414,7 +418,11 @@
 
 static inline void tcg_gen_shri_i32(TCGv ret, TCGv arg1, int32_t arg2)
 {
-    tcg_gen_shr_i32(ret, arg1, tcg_const_i32(arg2));
+    if (arg2 == 0) {
+        tcg_gen_mov_i32(ret, arg1);
+    } else {
+        tcg_gen_shr_i32(ret, arg1, tcg_const_i32(arg2));
+    }
 }
 
 static inline void tcg_gen_sar_i32(TCGv ret, TCGv arg1, TCGv arg2)
@@ -424,7 +432,11 @@
 
 static inline void tcg_gen_sari_i32(TCGv ret, TCGv arg1, int32_t arg2)
 {
-    tcg_gen_sar_i32(ret, arg1, tcg_const_i32(arg2));
+    if (arg2 == 0) {
+        tcg_gen_mov_i32(ret, arg1);
+    } else {
+        tcg_gen_sar_i32(ret, arg1, tcg_const_i32(arg2));
+    }
 }
 
 static inline void tcg_gen_brcond_i32(int cond, TCGv arg1, TCGv arg2, 
@@ -862,7 +874,11 @@
 
 static inline void tcg_gen_shli_i64(TCGv ret, TCGv arg1, int64_t arg2)
 {
-    tcg_gen_shl_i64(ret, arg1, tcg_const_i64(arg2));
+    if (arg2 == 0) {
+        tcg_gen_mov_i64(ret, arg1);
+    } else {
+        tcg_gen_shl_i64(ret, arg1, tcg_const_i64(arg2));
+    }
 }
 
 static inline void tcg_gen_shr_i64(TCGv ret, TCGv arg1, TCGv arg2)
@@ -872,7 +888,11 @@
 
 static inline void tcg_gen_shri_i64(TCGv ret, TCGv arg1, int64_t arg2)
 {
-    tcg_gen_shr_i64(ret, arg1, tcg_const_i64(arg2));
+    if (arg2 == 0) {
+        tcg_gen_mov_i64(ret, arg1);
+    } else {
+        tcg_gen_shr_i64(ret, arg1, tcg_const_i64(arg2));
+    }
 }
 
 static inline void tcg_gen_sar_i64(TCGv ret, TCGv arg1, TCGv arg2)
@@ -882,7 +902,11 @@
 
 static inline void tcg_gen_sari_i64(TCGv ret, TCGv arg1, int64_t arg2)
 {
-    tcg_gen_sar_i64(ret, arg1, tcg_const_i64(arg2));
+    if (arg2 == 0) {
+        tcg_gen_mov_i64(ret, arg1);
+    } else {
+        tcg_gen_sar_i64(ret, arg1, tcg_const_i64(arg2));
+    }
 }
 
 static inline void tcg_gen_brcond_i64(int cond, TCGv arg1, TCGv arg2,