From: Richard Henderson <richard.henderson@linaro.org>
Date: Thu, 24 Apr 2025 18:23:36 +0000 (+0000)
Subject: tcg/loongarch64: Fix vec_val computation in tcg_target_const_match
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a079836005fb92eb1fee19e59654b337a41fd0ff;p=thirdparty%2Fqemu.git

tcg/loongarch64: Fix vec_val computation in tcg_target_const_match

Only use vece for a vector constant.  This avoids an assertion
failure in sextract64 when vece contains garbage.

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 cbd7642b58..740b7c264d 100644
--- a/tcg/loongarch64/tcg-target.c.inc
+++ b/tcg/loongarch64/tcg-target.c.inc
@@ -211,12 +211,14 @@ static bool tcg_target_const_match(int64_t val, int ct,
     if ((ct & TCG_CT_CONST_WSZ) && val == (type == TCG_TYPE_I32 ? 32 : 64)) {
         return true;
     }
-    int64_t vec_val = sextract64(val, 0, 8 << vece);
-    if ((ct & TCG_CT_CONST_VCMP) && -0x10 <= vec_val && vec_val <= 0x1f) {
-        return true;
-    }
-    if ((ct & TCG_CT_CONST_VADD) && -0x1f <= vec_val && vec_val <= 0x1f) {
-        return true;
+    if (ct & (TCG_CT_CONST_VCMP | TCG_CT_CONST_VADD)) {
+        int64_t vec_val = sextract64(val, 0, 8 << vece);
+        if ((ct & TCG_CT_CONST_VCMP) && -0x10 <= vec_val && vec_val <= 0x1f) {
+            return true;
+        }
+        if ((ct & TCG_CT_CONST_VADD) && -0x1f <= vec_val && vec_val <= 0x1f) {
+            return true;
+        }
     }
     return false;
 }