matos/core/math.c
2019-04-11 22:34:20 +02:00

12 lines
179 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;
}