From e4eba27e29114842978234a44c92b2a945a6b46d Mon Sep 17 00:00:00 2001
From: Aurelien Jarno <aurelien@aurel32.net>
Date: Tue, 26 Mar 2013 19:56:02 +0100
Subject: [PATCH] target-i386: SSE4.2: fix pcmpXstrX instructions with
 "Masked(-)" polarity

valids can equals to -1 if the reg/mem string is empty. Change the
expression to have an empty xor mask in that case.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 target-i386/ops_sse.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target-i386/ops_sse.h b/target-i386/ops_sse.h
index 77ab410b9e..a0bac07ba3 100644
--- a/target-i386/ops_sse.h
+++ b/target-i386/ops_sse.h
@@ -2050,7 +2050,7 @@ static inline unsigned pcmpxstrx(CPUX86State *env, Reg *d, Reg *s,
         res ^= (2 << upper) - 1;
         break;
     case 3:
-        res ^= (2 << valids) - 1;
+        res ^= (1 << (valids + 1)) - 1;
         break;
     }