Fix andi, optimize addi and subi zero cases
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3985 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h
index 82aebb3..be50464 100644
--- a/tcg/tcg-op.h
+++ b/tcg/tcg-op.h
@@ -252,7 +252,12 @@
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_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 @@
{
/* 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 {
