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Use 32-bit registers for rdtscp output.

This commit is contained in:
Bartosz Taudul 2017-10-29 13:15:43 +01:00
parent 34123de977
commit 68f5a17bca

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@ -54,9 +54,9 @@ public:
const auto t = int64_t( __rdtscp( &cpu ) ); const auto t = int64_t( __rdtscp( &cpu ) );
return t; return t;
#elif defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 #elif defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64
uint64_t eax, edx; uint32_t eax, edx;
asm volatile ( "rdtscp" : "=a" (eax), "=d" (edx), "=c" (cpu) :: ); asm volatile ( "rdtscp" : "=a" (eax), "=d" (edx), "=c" (cpu) :: );
return ( edx << 32 ) + eax; return ( uint64_t( edx ) << 32 ) + uint64_t( eax );
#endif #endif
} }
#endif #endif