#include <math.h> | |
#include <stdint.h> | |
float frexpf(float x, int *e) | |
{ | |
union { float f; uint32_t i; } y = { x }; | |
int ee = y.i>>23 & 0xff; | |
if (!ee) { | |
if (x) { | |
x = frexpf(x*0x1p64, e); | |
*e -= 64; | |
} else *e = 0; | |
return x; | |
} else if (ee == 0xff) { | |
return x; | |
} | |
*e = ee - 0x7e; | |
y.i &= 0x807ffffful; | |
y.i |= 0x3f000000ul; | |
return y.f; | |
} |