cpuid-0.2.1.3: cbits/cpuid-pic.c

// http://sam.zoy.org/blog/2007-04-13-shlib-with-non-pic-code-have-inlin
#include <stdint.h>

void
cpuid_array(uint32_t op, uint32_t reg[4])
{
  asm volatile(
    "pushl %%ebx      \n" /* save %ebx */
    "cpuid            \n"
    "movl %%ebx, %1   \n" /* save what cpuid just put in %ebx */
    "popl %%ebx       \n" /* restore the old %ebx */
    : "=a"(reg[0]), "=r"(reg[1]), "=c"(reg[2]), "=d"(reg[3])
    : "a"(op)
    : "cc");
}