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#include "arch/probe.h"
/* flags we export */
int ceph_arch_intel_sse42 = 0;
#ifdef __x86_64__
/* intel cpu? */
static void do_cpuid(unsigned int *eax, unsigned int *ebx, unsigned int *ecx,
unsigned int *edx)
{
int id = *eax;
asm("movl %4, %%eax;"
"cpuid;"
"movl %%eax, %0;"
"movl %%ebx, %1;"
"movl %%ecx, %2;"
"movl %%edx, %3;"
: "=r" (*eax), "=r" (*ebx), "=r" (*ecx), "=r" (*edx)
: "r" (id)
: "eax", "ebx", "ecx", "edx");
}
int ceph_arch_intel_probe(void)
{
/* i know how to check this on x86_64... */
unsigned int eax = 1, ebx, ecx, edx;
do_cpuid(&eax, &ebx, &ecx, &edx);
if ((ecx & (1 << 20)) != 0) {
ceph_arch_intel_sse42 = 1;
}
return 0;
}
#else // __x86_64__
int ceph_arch_intel_probe(void)
{
/* no features */
return 0;
}
#endif // __x86_64__
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