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author | Ulrich Drepper <drepper@redhat.com> | 2005-12-14 15:06:39 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2005-12-14 15:06:39 +0000 |
commit | 9d13fb2413921c713f83efe331e8e4d219c62c6b (patch) | |
tree | 2d44d7ac45ab2d147eb8361bbff880c365aa8ad5 /math/w_exp2f.c | |
parent | b6ab06cef4670e02756bcdd4d2c33a49369a4346 (diff) | |
download | glibc-9d13fb2413921c713f83efe331e8e4d219c62c6b.zip glibc-9d13fb2413921c713f83efe331e8e4d219c62c6b.tar.gz glibc-9d13fb2413921c713f83efe331e8e4d219c62c6b.tar.bz2 |
Moved to csu/errno-loc.c.
Diffstat (limited to 'math/w_exp2f.c')
-rw-r--r-- | math/w_exp2f.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/math/w_exp2f.c b/math/w_exp2f.c new file mode 100644 index 0000000..9120c88 --- /dev/null +++ b/math/w_exp2f.c @@ -0,0 +1,32 @@ +/* + * 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) /* wrapper exp2f */ +{ +#ifdef _IEEE_LIBM + return __ieee754_exp2f (x); +#else + float z; + z = __ieee754_exp2f (x); + if (_LIB_VERSION != _IEEE_ && __finitef (x)) + { + if (x > o_threshold) + /* exp2 overflow */ + return (float) __kernel_standard ((double) x, (double) x, 144); + else if (x <= u_threshold) + /* exp2 underflow */ + return (float) __kernel_standard ((double) x, (double) x, 145); + } + return z; +#endif +} +weak_alias (__exp2f, exp2f) |