100 lines
2.0 KiB
C++
100 lines
2.0 KiB
C++
// WTFPL
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#include "CpuID.h"
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namespace spades {
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#if defined(__i386__) || defined(_M_IX86)
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static std::array<uint32_t, 4> cpuid(uint32_t a) {
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std::array<uint32_t, 4> regs;
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#ifdef WIN32
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__cpuid(reinterpret_cast<int *>(regs.data()), a);
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#else
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asm volatile("cpuid":
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"=a" (regs[0]),
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"=b" (regs[1]),
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"=c" (regs[2]),
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"=d" (regs[3]):
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"a"(a),
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"c"(0));
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#endif
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return regs;
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}
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CpuID::CpuID() {
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uint32_t maxStdLevel;
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{
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auto ar = cpuid(0);
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char buf[13];
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buf[12] = 0;
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maxStdLevel = ar[0];
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memcpy(buf, ar.data()+1, 12);
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vendor = buf;
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}
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{
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auto ar = cpuid(1);
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featureEcx = ar[2];
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featureEdx = ar[3];
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}
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{
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if(cpuid(0x80000000U)[0] >= 0x80000004U){
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char buf[49];
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buf[48] = 0;
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memcpy(buf, cpuid(0x80000002U).data(), 16);
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memcpy(buf+16, cpuid(0x80000003U).data(), 16);
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memcpy(buf+32, cpuid(0x80000004U).data(), 16);
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brand = buf;
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}else{
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brand = "Unknown";
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}
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}
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{
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auto ar = cpuid(7);
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// FIXME: sublevels?
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subfeature = ar[1];
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}
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{
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info = "(none)";
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}
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}
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bool CpuID::Supports(spades::CpuFeature feature) {
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switch(feature){
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case CpuFeature::MMX:
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return featureEdx & (1U << 23);
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case CpuFeature::SSE:
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return featureEdx & (1U << 25);
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case CpuFeature::SSE2:
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return featureEdx & (1U << 26);
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case CpuFeature::SSE3:
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return featureEcx & (1U << 0);
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case CpuFeature::SSSE3:
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return featureEcx & (1U << 9);
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case CpuFeature::FMA:
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return featureEcx & (1U << 12);
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case CpuFeature::AVX:
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return featureEcx & (1U << 28);
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case CpuFeature::AVX2:
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return subfeature & (1U << 5);
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case CpuFeature::AVX512CD:
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return subfeature & (1U << 28);
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case CpuFeature::AVX512ER:
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return subfeature & (1U << 27);
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case CpuFeature::AVX512PF:
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return subfeature & (1U << 26);
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case CpuFeature::AVX512F:
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return subfeature & (1U << 16);
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case CpuFeature::SimultaneousMT:
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return featureEdx & (1U << 28);
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}
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}
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#endif
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}
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