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cpucapab.cpp
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#include <string.h>
#include <cpuid.h>
#include <stdint.h>
#include "cpucapab.hpp"
cpuintrinsics getCpuCapabilities() {
auto cpuid = [](int* info, int InfoType){
__cpuid_count(InfoType, 0, info[0], info[1], info[2], info[3]);
};
cpuintrinsics flags;
memset(&flags, 0, sizeof(flags));
int32_t cpuinfo[4];
cpuid(cpuinfo, 0);
int32_t nIds = cpuinfo[0];
cpuid(cpuinfo, 0x80000000);
uint32_t nExIds = cpuinfo[0];
// Detect Features
if (nIds >= 0x00000001){
cpuid(cpuinfo, 0x00000001);
flags.MMX = (cpuinfo[3] & ((int32_t)1 << 23)) != 0;
flags.SSE = (cpuinfo[3] & ((int32_t)1 << 25)) != 0;
flags.SSE2 = (cpuinfo[3] & ((int32_t)1 << 26)) != 0;
flags.SSE3 = (cpuinfo[2] & ((int32_t)1 << 0)) != 0;
flags.SSSE3 = (cpuinfo[2] & ((int32_t)1 << 9)) != 0;
flags.SSE41 = (cpuinfo[2] & ((int32_t)1 << 19)) != 0;
flags.SSE42 = (cpuinfo[2] & ((int32_t)1 << 20)) != 0;
flags.AES = (cpuinfo[2] & ((int32_t)1 << 25)) != 0;
flags.AVX = (cpuinfo[2] & ((int32_t)1 << 28)) != 0;
flags.FMA3 = (cpuinfo[2] & ((int32_t)1 << 12)) != 0;
flags.RDRAND = (cpuinfo[2] & ((int32_t)1 << 30)) != 0;
}
if (nIds >= 0x00000007){
cpuid(cpuinfo, 0x00000007);
flags.AVX2 = (cpuinfo[1] & ((int32_t)1 << 5)) != 0;
flags.BMI1 = (cpuinfo[1] & ((int32_t)1 << 3)) != 0;
flags.BMI2 = (cpuinfo[1] & ((int32_t)1 << 8)) != 0;
flags.ADX = (cpuinfo[1] & ((int32_t)1 << 19)) != 0;
flags.SHA = (cpuinfo[1] & ((int32_t)1 << 29)) != 0;
flags.PREFETCHWT1 = (cpuinfo[2] & ((int32_t)1 << 0)) != 0;
flags.AVX512F = (cpuinfo[1] & ((int32_t)1 << 16)) != 0;
flags.AVX512CD = (cpuinfo[1] & ((int32_t)1 << 28)) != 0;
flags.AVX512PF = (cpuinfo[1] & ((int32_t)1 << 26)) != 0;
flags.AVX512ER = (cpuinfo[1] & ((int32_t)1 << 27)) != 0;
flags.AVX512VL = (cpuinfo[1] & ((int32_t)1 << 31)) != 0;
flags.AVX512BW = (cpuinfo[1] & ((int32_t)1 << 30)) != 0;
flags.AVX512DQ = (cpuinfo[1] & ((int32_t)1 << 17)) != 0;
flags.AVX512IFMA = (cpuinfo[1] & ((int32_t)1 << 21)) != 0;
flags.AVX512VBMI = (cpuinfo[2] & ((int32_t)1 << 1)) != 0;
}
if (nExIds >= 0x80000001){
cpuid(cpuinfo,0x80000001);
flags.X64 = (cpuinfo[3] & ((int32_t)1 << 29)) != 0;
flags.ABM = (cpuinfo[2] & ((int32_t)1 << 5)) != 0;
flags.SSE4A = (cpuinfo[2] & ((int32_t)1 << 6)) != 0;
flags.FMA4 = (cpuinfo[2] & ((int32_t)1 << 16)) != 0;
flags.XOP = (cpuinfo[2] & ((int32_t)1 << 11)) != 0;
}
return flags;
}