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don't clobber %ebx in the assembler.

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This commit is contained in:
Lars Knoll 2005-07-13 08:58:37 +00:00
parent bfb10bd2dc
commit 19e20c1470
1 changed files with 5 additions and 3 deletions
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8
fb/fbmmx.c
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@ -2334,7 +2334,7 @@ static unsigned int detectCPUFeatures(void) {
"=m" (vendor[4]),
"=m" (vendor[8])
:
: "%eax", "%ebx", "%ecx", "%edx"
: "%eax", "%ecx", "%edx"
);
unsigned int features = 0;
@ -2352,7 +2352,8 @@ static unsigned int detectCPUFeatures(void) {
/* check for AMD MMX extensions */
unsigned int result;
__asm__("mov $0x80000000, %%eax\n"
__asm__("push %%ebx\n"
"mov $0x80000000, %%eax\n"
"cpuid\n"
"xor %%edx, %%edx\n"
"cmp $0x1, %%eax\n"
@ -2361,9 +2362,10 @@ static unsigned int detectCPUFeatures(void) {
"cpuid\n"
"skip2:\n"
"mov %%edx, %0\n"
"pop %%ebx\n"
: "=r" (result)
:
: "%eax", "%ebx", "%ecx", "%edx"
: "%eax", "%ecx", "%edx"
);
if (result & (1<<22))
features |= MMX_Extensions;