65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
#include "pfc.h"
|
|
|
|
|
|
#if PFC_HAVE_CPUID
|
|
|
|
namespace pfc {
|
|
|
|
bool query_cpu_feature_set(unsigned p_value) {
|
|
#if _M_IX86_FP >= 2
|
|
// don't bother checking for SSE/SSE2 if compiled to use them
|
|
p_value &= ~(CPU_HAVE_SSE | CPU_HAVE_SSE2);
|
|
if (p_value == 0) return true;
|
|
#endif
|
|
|
|
#ifdef _MSC_VER
|
|
__try {
|
|
#endif
|
|
if (p_value & (CPU_HAVE_SSE | CPU_HAVE_SSE2 | CPU_HAVE_SSE3 | CPU_HAVE_SSSE3 | CPU_HAVE_SSE41 | CPU_HAVE_SSE42)) {
|
|
int buffer[4];
|
|
__cpuid(buffer,1);
|
|
if (p_value & CPU_HAVE_SSE) {
|
|
if ((buffer[3]&(1<<25)) == 0) return false;
|
|
}
|
|
if (p_value & CPU_HAVE_SSE2) {
|
|
if ((buffer[3]&(1<<26)) == 0) return false;
|
|
}
|
|
if (p_value & CPU_HAVE_SSE3) {
|
|
if ((buffer[2]&(1<<0)) == 0) return false;
|
|
}
|
|
if (p_value & CPU_HAVE_SSSE3) {
|
|
if ((buffer[2]&(1<<9)) == 0) return false;
|
|
}
|
|
if (p_value & CPU_HAVE_SSE41) {
|
|
if ((buffer[2]&(1<<19)) == 0) return false;
|
|
}
|
|
if (p_value & CPU_HAVE_SSE42) {
|
|
if ((buffer[2]&(1<<20)) == 0) return false;
|
|
}
|
|
}
|
|
#ifdef _M_IX86
|
|
if (p_value & (CPU_HAVE_3DNOW_EX | CPU_HAVE_3DNOW)) {
|
|
int buffer_amd[4];
|
|
__cpuid(buffer_amd,0x80000000);
|
|
if ((unsigned)buffer_amd[0] < 0x80000001) return false;
|
|
__cpuid(buffer_amd,0x80000001);
|
|
|
|
if (p_value & CPU_HAVE_3DNOW) {
|
|
if ((buffer_amd[3]&(1<<31)) == 0) return false;
|
|
}
|
|
if (p_value & CPU_HAVE_3DNOW_EX) {
|
|
if ((buffer_amd[3]&(1<<30)) == 0) return false;
|
|
}
|
|
}
|
|
#endif
|
|
return true;
|
|
#ifdef _MSC_VER
|
|
} __except(1) {
|
|
return false;
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#endif
|