| /* | |
| * wrapper log2(X) | |
| */ | |
| #include <math.h> | |
| #include "math_private.h" | |
| float | |
| __log2f (float x) /* wrapper log2f */ | |
| { | |
| #ifdef _IEEE_LIBM | |
| return __ieee754_log2f (x); | |
| #else | |
| float z; | |
| z = __ieee754_log2f (x); | |
| if (_LIB_VERSION == _IEEE_ || __isnanf (x)) return z; | |
| if (x <= 0.0f) | |
| { | |
| if (x == 0.0f) | |
| /* log2f (0) */ | |
| return __kernel_standard ((double) x, (double) x, 148); | |
| else | |
| /* log2f (x < 0) */ | |
| return __kernel_standard ((double) x, (double) x, 149); | |
| } | |
| else | |
| return z; | |
| #endif | |
| } | |
| weak_alias (__log2f, log2f) |