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https://github.com/wolfpld/tracy.git
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41 lines
939 B
C++
41 lines
939 B
C++
#ifndef __TRACYPOPCNT_HPP__
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#define __TRACYPOPCNT_HPP__
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#include <limits.h>
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#include <stdint.h>
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#if defined _WIN64
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# include <intrin.h>
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# define TracyCountBits __popcnt64
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# define TracyLzcnt __lzcnt64
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#elif defined __GNUC__ || defined __clang__
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static inline uint64_t TracyCountBits( uint64_t i )
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{
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return uint64_t( __builtin_popcountll( i ) );
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}
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static inline uint64_t TracyLzcnt( uint64_t i )
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{
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return uint64_t( __builtin_clzll( i ) );
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}
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#else
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static inline uint64_t TracyCountBits( uint64_t i )
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{
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i = i - ( (i >> 1) & 0x5555555555555555 );
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i = ( i & 0x3333333333333333 ) + ( (i >> 2) & 0x3333333333333333 );
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i = ( (i + (i >> 4) ) & 0x0F0F0F0F0F0F0F0F );
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return ( i * (0x0101010101010101) ) >> 56;
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}
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static inline uint64_t TracyLzcnt( uint64_t i )
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{
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i |= i >> 1;
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i |= i >> 2;
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i |= i >> 4;
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i |= i >> 8;
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i |= i >> 16;
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i |= i >> 32;
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return 64 - TracyCountBits( i );
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}
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#endif
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#endif
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