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Feature: Add support for rdtsc for ARM-based Windows (MSVC)

pull/8588/head
Owen Rudge 2020-12-11 15:20:13 +00:00
parent 2d9e164ec4
commit 6d95ed53dc
1 changed files with 8 additions and 1 deletions
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9
src/cpu.cpp
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@ -16,11 +16,18 @@
/* rdtsc for MSC_VER, uses simple inline assembly, or _rdtsc /* rdtsc for MSC_VER, uses simple inline assembly, or _rdtsc
* from external win64.asm because VS2005 does not support inline assembly */ * from external win64.asm because VS2005 does not support inline assembly */
#if defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64)) && !defined(RDTSC_AVAILABLE) #if defined(_MSC_VER) && !defined(RDTSC_AVAILABLE)
#include <intrin.h> #include <intrin.h>
#include <windows.h>
uint64 ottd_rdtsc() uint64 ottd_rdtsc()
{ {
#if defined(_M_ARM)
return __rdpmccntr64();
#elif defined(_M_ARM64)
return _ReadStatusReg(ARM64_PMCCNTR_EL0);
#else
return __rdtsc(); return __rdtsc();
#endif
} }
#define RDTSC_AVAILABLE #define RDTSC_AVAILABLE
#endif #endif