CPUID: Difference between revisions
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m Added PCIDE bit to CPUID's possible return values |
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== Using CPUID from GCC ==
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>
{{Disputed}}
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<source lang="c">
/*
enum cpuid_requests {
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