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Merge pull request #21 from encounter/sse4a 

Add SSE4a CPUID check
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Phillip Stephens 2019-12-10 20:48:34 -08:00 committed by GitHub
parent bf416af1ed c3671245e2
commit c70243ff32
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1 changed files with 7 additions and 1 deletions
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8
src/Math.cpp
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@ -54,7 +54,8 @@ void detectCPU() {
*reinterpret_cast<int*>((char*)g_cpuFeatures.cpuVendor + 4) = regs[3];
*reinterpret_cast<int*>((char*)g_cpuFeatures.cpuVendor + 8) = regs[2];
getCpuInfo(0x80000000, regs);
if (regs[0] >= 0x80000004) {
int maxExtended = regs[0];
if (maxExtended >= 0x80000004) {
for (unsigned int i = 0x80000002; i <= 0x80000004; i++) {
getCpuInfo(i, regs);
// Interpret CPU brand string and cache information.
@ -84,6 +85,11 @@ void detectCPU() {
memset((bool*)&g_cpuFeatures.AVX2, ((regs[1] & 0x00000020) != 0), 1);
}
if (maxExtended >= 0x80000001) {
getCpuInfo(0x80000001, regs);
memset((bool*)&g_cpuFeatures.SSE4a, ((regs[2] & (1 << 6)) != 0), 1);
}
isCPUInit = true;
#endif
}