From: José Fonseca <jfonseca@vmware.com>
Date: Fri, 9 Oct 2009 12:22:42 +0000 (+0100)
Subject: util: Force ESI register for cpuid's ebx result.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c595dea23c6e77dc5d44a7f4b86916b72e09f970;p=mesa.git

util: Force ESI register for cpuid's ebx result.

Fixes a segfault and better code. Unfortunately using an arbitrary
register ("=r") causes the gcc to abort when the code is optimized saying
it can't satisfy the constraint. Setting seems to do the trick.
---

diff --git a/src/gallium/auxiliary/util/u_cpu_detect.c b/src/gallium/auxiliary/util/u_cpu_detect.c
index 70ce25cfcf4..ded361ce704 100644
--- a/src/gallium/auxiliary/util/u_cpu_detect.c
+++ b/src/gallium/auxiliary/util/u_cpu_detect.c
@@ -346,7 +346,7 @@ cpuid(uint32_t ax, uint32_t *p)
      "cpuid\n\t"
      "xchgl %%ebx, %1"
      : "=a" (p[0]),
-       "=m" (p[1]),
+       "=S" (p[1]),
        "=c" (p[2]),
        "=d" (p[3])
      : "0" (ax)