arm9/lib/NitroSDK/src/MATH_pop.c


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#include "global.h"
#include "MATH_pop.h"

ARM_FUNC u8 MATH_CountPopulation(u32 x) {
    x -= (x >> 1) & 0x55555555;
    x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
    x += x >> 4;
    x &= 0x0f0f0f0f;
    x += x >> 8;
    x += x >> 16;
    return (u8)x;
}