diff options
Diffstat (limited to 'math/w_exp2f.c')
| -rw-r--r-- | math/w_exp2f.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/math/w_exp2f.c b/math/w_exp2f.c index c4e9e94164..7c277ef390 100644 --- a/math/w_exp2f.c +++ b/math/w_exp2f.c @@ -2,22 +2,18 @@ * wrapper exp2f(x) */ -#include <float.h> #include <math.h> #include <math_private.h> -static const float o_threshold = (float) FLT_MAX_EXP; -static const float u_threshold = (float) (FLT_MIN_EXP - FLT_MANT_DIG - 1); - float __exp2f (float x) { - if (__builtin_expect (islessequal (x, u_threshold) - || isgreater (x, o_threshold), 0) - && _LIB_VERSION != _IEEE_ && __finitef (x)) + float z = __ieee754_exp2f (x); + if (__builtin_expect (!__finitef (z), 0) + && __finitef (x) && _LIB_VERSION != _IEEE_) /* exp2 overflow: 144, exp2 underflow: 145 */ - return __kernel_standard_f (x, x, 144 + (x <= o_threshold)); + return __kernel_standard_f (x, x, 144 + !!__signbitf (x)); - return __ieee754_exp2f (x); + return z; } weak_alias (__exp2f, exp2f) |