/** | |
* This file has no copyright assigned and is placed in the Public Domain. | |
* This file is part of the mingw-w64 runtime package. | |
* No warranty is given; refer to the file DISCLAIMER.PD within this package. | |
*/ | |
#include <intrin.h> | |
/* Clang has support for MSVC builtins, GCC doesn't */ | |
#ifndef __has_builtin | |
#define __has_builtin(x) 0 | |
#endif | |
#if !__has_builtin(__rdtsc) | |
unsigned __int64 __rdtsc(void) | |
{ | |
#ifdef _WIN64 | |
unsigned __int64 val1, val2; | |
#else | |
unsigned int val1, val2; | |
#endif | |
__asm__ __volatile__ ( | |
"rdtsc" | |
: "=a" (val1), "=d" (val2)); | |
return ((unsigned __int64)val1) | (((unsigned __int64)val2) << 32); | |
} | |
#endif |