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

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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.
This commit is contained in:
José Fonseca 2009-10-09 13:22:42 +01:00
parent c4d54b62f5
commit 00ffef383c
1 changed files with 1 additions and 1 deletions
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src/gallium/auxiliary/util/u_cpu_detect.c
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@ -346,7 +346,7 @@ cpuid(uint32_t ax, uint32_t *p)
"cpuid\n\t" "cpuid\n\t"
"xchgl %%ebx, %1" "xchgl %%ebx, %1"
: "=a" (p[0]), : "=a" (p[0]),
"=m" (p[1]), "=S" (p[1]),
"=c" (p[2]), "=c" (p[2]),
"=d" (p[3]) "=d" (p[3])
: "0" (ax) : "0" (ax)