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#ifndef CPUID_H
#define CPUID_H
extern inline void
cpuid (unsigned *a, unsigned *b, unsigned *c, unsigned *d, unsigned in)
{
asm ("cpuid"
: "=a" (*a),
"=b" (*b),
"=c" (*c),
"=d" (*d)
: "a" (in));
}
extern inline bool
can_set_flag (unsigned flag)
{
unsigned r1, r2;
asm("pushfl\n"
"popl %0\n"
"movl %0, %1\n"
"xorl %2, %0\n"
"pushl %0\n"
"popfl\n"
"pushfl\n"
"popl %0\n"
"pushl %1\n"
"popfl\n"
: "=&r" (r1), "=&r" (r2)
: "ir" (flag)
);
return ((r1 ^ r2) & flag) != 0;
}
#endif // !CPUID_H
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