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/* cpuid.h: Define cpuid instruction
Copyright 2003, 2012, 2014 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifndef CPUID_H
#define CPUID_H
static inline void __attribute ((always_inline))
cpuid (uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t ain,
uint32_t cin = 0)
{
asm volatile ("cpuid"
: "=a" (*a), "=b" (*b), "=c" (*c), "=d" (*d)
: "a" (ain), "c" (cin));
}
#ifdef __x86_64__
static inline bool __attribute ((always_inline))
can_set_flag (register uint32_t long flag)
{
register uint32_t long r1, r2;
asm volatile ("pushfq\n"
"popq %0\n"
"movq %0, %1\n"
"xorq %2, %0\n"
"pushq %0\n"
"popfq\n"
"pushfq\n"
"popq %0\n"
"pushq %1\n"
"popfq\n"
: "=&r" (r1), "=&r" (r2)
: "ir" (flag)
);
return ((r1 ^ r2) & flag) != 0;
}
#else
static inline bool __attribute ((always_inline))
can_set_flag (register uint32_t flag)
{
register uint32_t r1, r2;
asm volatile ("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
#endif // !CPUID_H
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