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added std analog of __builtin_popcount poor performance, but good compability

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cryptozoidberg 2019-07-16 21:14:21 +02:00
parent 41aa0932ce
commit 0b1c1de8a8
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1 changed files with 2 additions and 1 deletions
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contrib/ethereum/libethash/bit_manipulation.h
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@ -9,6 +9,7 @@
#include "support/attributes.h"
#include <stdint.h>
#include <bitset>
#ifdef __cplusplus
extern "C" {
@ -39,7 +40,7 @@ static inline uint32_t clz32(uint32_t x)
static inline uint32_t popcount32(uint32_t x)
{
return (uint32_t)__builtin_popcount(x);
return std::bitset<32>(x).count();
}
static inline uint32_t mul_hi32(uint32_t x, uint32_t y)