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#pragma once
#include <cstdint>
#ifdef _MSC_VER
#include <intrin.h>
#endif
#include <c10/macros/Export.h>
namespace caffe2 {
class CpuId;
TORCH_API const CpuId& GetCpuId();
///////////////////////////////////////////////////////////////////////////////
// Implementation of CpuId that is borrowed from folly.
///////////////////////////////////////////////////////////////////////////////
// TODO: It might be good to use cpuinfo third-party dependency instead for
// consistency sake.
/**
* Identification of an Intel CPU.
* Supports CPUID feature flags (EAX=1) and extended features (EAX=7, ECX=0).
* Values from
* http://www.intel.com/content/www/us/en/processors/processor-identification-cpuid-instruction-note.html
*/
class CpuId {
public:
CpuId();
#define X(name, r, bit) \
inline bool name() const { \
return ((r) & (1U << bit)) != 0; \
}
// cpuid(1): Processor Info and Feature Bits.
#define C(name, bit) X(name, f1c_, bit)
C(sse3, 0)
C(pclmuldq, 1)
C(dtes64, 2)
C(monitor, 3)
C(dscpl, 4)
C(vmx, 5)
C(smx, 6)
C(eist, 7)
C(tm2, 8)
C(ssse3, 9)
C(cnxtid, 10)
C(fma, 12)
C(cx16, 13)
C(xtpr, 14)
C(pdcm, 15)
C(pcid, 17)
C(dca, 18)
C(sse41, 19)
C(sse42, 20)
C(x2apic, 21)
C(movbe, 22)
C(popcnt, 23)
C(tscdeadline, 24)
C(aes, 25)
C(xsave, 26)
C(osxsave, 27)
C(avx, 28)
C(f16c, 29)
C(rdrand, 30)
#undef C
#define D(name, bit) X(name, f1d_, bit)
D(fpu, 0)
D(vme, 1)
D(de, 2)
D(pse, 3)
D(tsc, 4)
D(msr, 5)
D(pae, 6)
D(mce, 7)
D(cx8, 8)
D(apic, 9)
D(sep, 11)
D(mtrr, 12)
D(pge, 13)
D(mca, 14)
D(cmov, 15)
D(pat, 16)
D(pse36, 17)
D(psn, 18)
D(clfsh, 19)
D(ds, 21)
D(acpi, 22)
D(mmx, 23)
D(fxsr, 24)
D(sse, 25)
D(sse2, 26)
D(ss, 27)
D(htt, 28)
D(tm, 29)
D(pbe, 31)
#undef D
// cpuid(7): Extended Features.
#define B(name, bit) X(name, f7b_, bit)
B(bmi1, 3)
B(hle, 4)
B(avx2, 5)
B(smep, 7)
B(bmi2, 8)
B(erms, 9)
B(invpcid, 10)
B(rtm, 11)
B(mpx, 14)
B(avx512f, 16)
B(avx512dq, 17)
B(rdseed, 18)
B(adx, 19)
B(smap, 20)
B(avx512ifma, 21)
B(pcommit, 22)
B(clflushopt, 23)
B(clwb, 24)
B(avx512pf, 26)
B(avx512er, 27)
B(avx512cd, 28)
B(sha, 29)
B(avx512bw, 30)
B(avx512vl, 31)
#undef B
#define E(name, bit) X(name, f7c_, bit)
E(prefetchwt1, 0)
E(avx512vbmi, 1)
#undef E
#undef X
private:
TORCH_API static uint32_t f1c_;
TORCH_API static uint32_t f1d_;
TORCH_API static uint32_t f7b_;
TORCH_API static uint32_t f7c_;
};
} // namespace caffe2
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