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| author | Ulrich Drepper <drepper@redhat.com> | 2004-12-22 20:10:10 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2004-12-22 20:10:10 +0000 |
| commit | a334319f6530564d22e775935d9c91663623a1b4 (patch) | |
| tree | b5877475619e4c938e98757d518bb1e9cbead751 /sysdeps/generic/w_log2.c | |
| parent | 0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (diff) | |
| download | glibc-a334319f6530564d22e775935d9c91663623a1b4.tar.gz glibc-a334319f6530564d22e775935d9c91663623a1b4.tar.xz glibc-a334319f6530564d22e775935d9c91663623a1b4.zip | |
(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.
Diffstat (limited to 'sysdeps/generic/w_log2.c')
| -rw-r--r-- | sysdeps/generic/w_log2.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/sysdeps/generic/w_log2.c b/sysdeps/generic/w_log2.c new file mode 100644 index 0000000000..7966ff359f --- /dev/null +++ b/sysdeps/generic/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 |