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| author | Jakub Jelinek <jakub@redhat.com> | 2005-12-19 12:11:38 +0000 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2005-12-19 12:11:38 +0000 |
| commit | 2c6cfe6853a30deb4af842aacc924fa298d0521a (patch) | |
| tree | 7fcc409e499bb8e3d96522f7fc2393fc10e53db2 /math/w_exp2f.c | |
| parent | 3ccb96cd41b38d0159bdf8aad229c3599864c65d (diff) | |
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Updated to fedora-glibc-20051219T1003cvs/fedora-glibc-2_3_90-19
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 0000000000..9120c88b60 --- /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) |