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)