From: Richard Henderson <richard.henderson@linaro.org>
Date: Thu, 6 Apr 2023 01:37:25 +0000 (-0700)
Subject: tcg/loongarch64: Conditionalize tcg_out_exts_i32_i64
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=341ac0a05509de103f26e8819b5fecea887f5413;p=qemu.git

tcg/loongarch64: Conditionalize tcg_out_exts_i32_i64

Since TCG_TYPE_I32 values are kept sign-extended in registers,
via ".w" instructions, we need not extend if the register matches.
This is already relied upon by comparisons.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---

diff --git a/tcg/loongarch64/tcg-target.c.inc b/tcg/loongarch64/tcg-target.c.inc
index 21c2fc9e98..0940788c6f 100644
--- a/tcg/loongarch64/tcg-target.c.inc
+++ b/tcg/loongarch64/tcg-target.c.inc
@@ -463,7 +463,9 @@ static void tcg_out_ext32s(TCGContext *s, TCGReg ret, TCGReg arg)
 
 static void tcg_out_exts_i32_i64(TCGContext *s, TCGReg ret, TCGReg arg)
 {
-    tcg_out_ext32s(s, ret, arg);
+    if (ret != arg) {
+        tcg_out_ext32s(s, ret, arg);
+    }
 }
 
 static void tcg_out_extu_i32_i64(TCGContext *s, TCGReg ret, TCGReg arg)