Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20231026013945.1152174-2-richard.henderson@linaro.org>
---
tcg/tcg-op.c | 18 ++----------------
1 file changed, 2 insertions(+), 16 deletions(-)
diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c
index de096a6f93..aa6bc6f57d 100644
--- a/tcg/tcg-op.c
+++ b/tcg/tcg-op.c
@@ -372,12 +372,7 @@ void tcg_gen_subfi_i32(TCGv_i32 ret, int32_t arg1, TCGv_i32 arg2)
void tcg_gen_subi_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)
{
- /* some cases can be optimized here */
- if (arg2 == 0) {
- tcg_gen_mov_i32(ret, arg1);
- } else {
- tcg_gen_sub_i32(ret, arg1, tcg_constant_i32(arg2));
- }
+ tcg_gen_addi_i32(ret, arg1, -arg2);
}
void tcg_gen_neg_i32(TCGv_i32 ret, TCGv_i32 arg)
@@ -1752,16 +1747,7 @@ void tcg_gen_subfi_i64(TCGv_i64 ret, int64_t arg1, TCGv_i64 arg2)
void tcg_gen_subi_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
{
- /* some cases can be optimized here */
- if (arg2 == 0) {
- tcg_gen_mov_i64(ret, arg1);
- } else if (TCG_TARGET_REG_BITS == 64) {
- tcg_gen_sub_i64(ret, arg1, tcg_constant_i64(arg2));
- } else {
- tcg_gen_sub2_i32(TCGV_LOW(ret), TCGV_HIGH(ret),
- TCGV_LOW(arg1), TCGV_HIGH(arg1),
- tcg_constant_i32(arg2), tcg_constant_i32(arg2 >> 32));
- }
+ tcg_gen_addi_i64(ret, arg1, -arg2);
}
void tcg_gen_neg_i64(TCGv_i64 ret, TCGv_i64 arg)
--
2.34.1