matos/userspace/math.c
2021-11-05 23:02:23 +01:00

10 lines
169 B
C

#include "math.h"
inline uint32_t log2(const uint32_t x)
{
uint32_t y;
// Get the highest set bit
asm("\tbsr %1, %0\n" : "=r"(y) : "r"(x));
return y;
}