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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_log2.c | |
| parent | 3ccb96cd41b38d0159bdf8aad229c3599864c65d (diff) | |
| download | glibc-2c6cfe6853a30deb4af842aacc924fa298d0521a.tar.gz glibc-2c6cfe6853a30deb4af842aacc924fa298d0521a.tar.xz glibc-2c6cfe6853a30deb4af842aacc924fa298d0521a.zip | |
Updated to fedora-glibc-20051219T1003 cvs/fedora-glibc-2_3_90-19
Diffstat (limited to 'math/w_log2.c')
| -rw-r--r-- | math/w_log2.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/math/w_log2.c b/math/w_log2.c new file mode 100644 index 0000000000..d56a6ee663 --- /dev/null +++ b/math/w_log2.c @@ -0,0 +1,32 @@ +/* + * wrapper log2(X) + */ + +#include <math.h> +#include "math_private.h" + +double +__log2 (double x) /* wrapper log2 */ +{ +#ifdef _IEEE_LIBM + return __ieee754_log2 (x); +#else + double z; + z = __ieee754_log2 (x); + if (_LIB_VERSION == _IEEE_ || __isnan (x)) return z; + if (x <= 0.0) + { + if (x == 0.0) + return __kernel_standard (x, x, 48); /* log2 (0) */ + else + return __kernel_standard (x, x, 49); /* log2 (x < 0) */ + } + else + return z; +#endif +} +weak_alias (__log2, log2) +#ifdef NO_LONG_DOUBLE +strong_alias (__log2, __log2l) +weak_alias (__log2, log2l) +#endif |