diff options
Diffstat (limited to 'libc/math/w_exp2l.c')
| -rw-r--r-- | libc/math/w_exp2l.c | 22 |
1 files changed, 7 insertions, 15 deletions
diff --git a/libc/math/w_exp2l.c b/libc/math/w_exp2l.c index fea5425ac..ac8d231e2 100644 --- a/libc/math/w_exp2l.c +++ b/libc/math/w_exp2l.c @@ -4,28 +4,20 @@ #include <float.h> #include <math.h> -#include "math_private.h" +#include <math_private.h> static const long double o_threshold = (long double) LDBL_MAX_EXP; static const long double u_threshold = (long double) (LDBL_MIN_EXP - LDBL_MANT_DIG - 1); long double -__exp2l (long double x) /* wrapper exp2l */ +__exp2l (long double x) { -#ifdef _IEEE_LIBM + if (__builtin_expect (x <= u_threshold || x > o_threshold, 0) + && _LIB_VERSION != _IEEE_ && __finitel (x)) + /* exp2 overflow: 244, exp2 underflow: 245 */ + return __kernel_standard (x, x, 244 + (x <= o_threshold)); + return __ieee754_exp2l (x); -#else - long double z; - z = __ieee754_exp2l (x); - if (_LIB_VERSION != _IEEE_ && __finitel (x)) - { - if (x > o_threshold) - return __kernel_standard (x, x, 244); /* exp2l overflow */ - else if (x <= u_threshold) - return __kernel_standard (x, x, 245); /* exp2l underflow */ - } - return z; -#endif } weak_alias (__exp2l, exp2l) |