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trezor-firmware/storage/storage_utils.c
2024-02-20 09:37:28 +01:00

12 lines
310 B
C

#include <stdint.h>
uint32_t hamming_weight(uint32_t value) {
value = value - ((value >> 1) & 0x55555555);
value = (value & 0x33333333) + ((value >> 2) & 0x33333333);
value = (value + (value >> 4)) & 0x0F0F0F0F;
value = value + (value >> 8);
value = value + (value >> 16);
return value & 0x3F;
}