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x64CPUDetect: Add flag for slow PDEP/PEXT on AMD Zen
For some unknown reason PDEP and PEXT are ridiculously slow on AMD Zen architecture.
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@ -175,6 +175,7 @@ void CPUInfo::Detect()
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}
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bFlushToZero = bSSE;
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bFastBMI2 = bBMI2 && !bZen;
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if (max_ex_fn >= 0x80000004)
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{
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