/* * wrapper exp2f(x) */ #include <math.h> #include "math_private.h" float exp2f (float x) { #if __UCLIBC_HAS_FENV__ float z = (float) pow(2.0, (double) x); if (__builtin_expect (!isfinite (z) || z == 0, 0) && isfinite (x) && _LIB_VERSION != _IEEE_) /* exp2 overflow: 144, exp2 underflow: 145 */ return __kernel_standard_f (x, x, 144 + !!signbit (x)); return z; #else return (float) pow(2.0, (double) x); #endif }