CPUID: Difference between revisions

Alternatively, one can use the __get_cpuid function that comes with GCC. To use this function, include <cpuid.h>.

<source>

#include <cpuid.h>

/* Example: Get CPU's model number */

static int get_model(void)

{

int ebx, unused;

__cpuid(0, unused, ebx, unused, unused);

return ebx;

}

/* Example: Check for builtin local APIC. */

static int check_apic(void)

{

unsigned int eax, unused, edx;

__get_cpuid(1, &eax, &unused, &unused, %edx);

return edx & CPUID_FEAT_EDX_APIC;

}

</source>

/* DEPRECATED: You should use the <cpuid.h> header that comes with GCC instead. */