// __asm__ blocks are only checked for inline functions that end up being
// emitted, so call functions with __asm__ blocks to make sure their inline
// assembly parses.
void f() {
__movsb(0, 0, 0);
__movsd(0, 0, 0);
__movsw(0, 0, 0);
__stosd(0, 0, 0);
__stosw(0, 0, 0);
#ifdef _M_X64
__movsq(0, 0, 0);
__stosq(0, 0, 0);
#endif
int info[4];
__cpuid(info, 0);
__cpuidex(info, 0, 0);
_xgetbv(0);
__halt();
__nop();
__readmsr(0);
// FIXME: Call these in 64-bit too once the intrinsics have been fixed to
// work there, PR19301
#ifndef _M_X64
__readcr3();
__writecr3(0);
#endif
#ifdef _M_ARM
__dmb(_ARM_BARRIER_ISHST);
#endif
}
static int CPUCheckForExtensions()
{
int result = 0;
int cpuinfo[4];
__cpuid(cpuinfo, 1);
if (IS_BIT_SET(cpuinfo[3], 0))
result |= CPUF_FPU;
if (IS_BIT_SET(cpuinfo[3], 23))
result |= CPUF_MMX;
if (IS_BIT_SET(cpuinfo[3], 25))
result |= CPUF_SSE | CPUF_INTEGER_SSE;
if (IS_BIT_SET(cpuinfo[3], 26))
result |= CPUF_SSE2;
if (IS_BIT_SET(cpuinfo[2], 0))
result |= CPUF_SSE3;
if (IS_BIT_SET(cpuinfo[2], 9))
result |= CPUF_SSSE3;
if (IS_BIT_SET(cpuinfo[2], 19))
result |= CPUF_SSE4_1;
if (IS_BIT_SET(cpuinfo[2], 20))
result |= CPUF_SSE4_2;
// AVX
#if (_MSC_FULL_VER >= 160040219) // We require VC++2010 SP1 at least
bool xgetbv_supported = IS_BIT_SET(cpuinfo[2], 27);
bool avx_supported = IS_BIT_SET(cpuinfo[2], 28);
if (xgetbv_supported && avx_supported)
{
if ((_xgetbv(_XCR_XFEATURE_ENABLED_MASK) & 0x6ull) == 0x6ull)
result |= CPUF_AVX;
}
#endif
// 3DNow!, 3DNow!, and ISSE
__cpuid(cpuinfo, 0x80000000);
if (cpuinfo[0] >= 0x80000001)
{
__cpuid(cpuinfo, 0x80000001);
if (IS_BIT_SET(cpuinfo[3], 31))
result |= CPUF_3DNOW;
if (IS_BIT_SET(cpuinfo[3], 30))
result |= CPUF_3DNOW_EXT;
if (IS_BIT_SET(cpuinfo[3], 22))
result |= CPUF_INTEGER_SSE;
}
return result;
}
static void xgetbv(unsigned int op, unsigned int* eax, unsigned int* edx) {
*eax = 0; *edx = 0;
if (op == 0)
*eax = _xgetbv(_XCR_XFEATURE_ENABLED_MASK);
}
uint32_t GetXCR0Eax(void) { return _xgetbv(0); }
unsigned int
xgetsetbv (void)
{
_xsetbv (0, 0);
return _xgetbv (0);
}