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RandomX refactoring, moved more stuff to compile time

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Small x86 JIT compiler speedup.
This commit is contained in:
SChernykh 2020-09-18 20:51:25 +02:00
parent d11a313d88
commit c7476e076b
11 changed files with 149 additions and 160 deletions
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31
src/backend/cpu/platform/BasicCpuInfo.cpp
View file

@ -212,6 +212,37 @@ xmrig::BasicCpuInfo::BasicCpuInfo() :
m_vendor = VENDOR_INTEL;
m_assembly = Assembly::INTEL;
m_msrMod = MSR_MOD_INTEL;
struct
{
unsigned int stepping : 4;
unsigned int model : 4;
unsigned int family : 4;
unsigned int processor_type : 2;
unsigned int reserved1 : 2;
unsigned int ext_model : 4;
unsigned int ext_family : 8;
unsigned int reserved2 : 4;
} processor_info;
cpuid(1, data);
memcpy(&processor_info, data, sizeof(processor_info));
// Intel JCC erratum mitigation
if (processor_info.family == 6) {
const uint32_t model = processor_info.model | (processor_info.ext_model << 4);
const uint32_t stepping = processor_info.stepping;
// Affected CPU models and stepping numbers are taken from https://www.intel.com/content/dam/support/us/en/documents/processors/mitigations-jump-conditional-code-erratum.pdf
m_jccErratum =
((model == 0x4E) && (stepping == 0x3)) ||
((model == 0x55) && (stepping == 0x4)) ||
((model == 0x5E) && (stepping == 0x3)) ||
((model == 0x8E) && (stepping >= 0x9) && (stepping <= 0xC)) ||
((model == 0x9E) && (stepping >= 0x9) && (stepping <= 0xD)) ||
((model == 0xA6) && (stepping == 0x0)) ||
((model == 0xAE) && (stepping == 0xA));
}
}
}
# endif

2
src/backend/cpu/platform/BasicCpuInfo.h
View file

@ -61,11 +61,13 @@ protected:
inline size_t packages() const override { return 1; }
inline size_t threads() const override { return m_threads; }
inline Vendor vendor() const override { return m_vendor; }
inline bool jccErratum() const override { return m_jccErratum; }
protected:
char m_brand[64 + 6]{};
size_t m_threads;
Vendor m_vendor = VENDOR_UNKNOWN;
bool m_jccErratum = false;
private:
Assembly m_assembly = Assembly::NONE;