From: Matt Turner <mattst88@gmail.com>
Date: Thu, 26 May 2016 22:53:30 +0000 (-0700)
Subject: mesa: Avoid aliasing violation in FXT1.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f5ac1d366e81ee9ad11f44ee64a5b556bc6f1989;p=mesa.git

mesa: Avoid aliasing violation in FXT1.

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
---

diff --git a/src/mesa/main/texcompress_fxt1.c b/src/mesa/main/texcompress_fxt1.c
index ae339e11d39..c5646fbd7a3 100644
--- a/src/mesa/main/texcompress_fxt1.c
+++ b/src/mesa/main/texcompress_fxt1.c
@@ -177,8 +177,8 @@ _mesa_texstore_rgba_fxt1(TEXSTORE_PARAMS)
 #define LL_RMS_D 10 /* fault tolerance (maximum delta) */
 #define LL_RMS_E 255 /* fault tolerance (maximum error) */
 #define ALPHA_TS 2 /* alpha threshold: (255 - ALPHA_TS) deemed opaque */
-#define ISTBLACK(v) (*((GLuint *)(v)) == 0)
-
+static const GLuint zero = 0;
+#define ISTBLACK(v) (memcmp(&(v), &zero, sizeof(zero)) == 0)
 
 /*
  * Define a 64-bit unsigned integer type and macros