From 9d13fb2413921c713f83efe331e8e4d219c62c6b Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 14 Dec 2005 15:06:39 +0000 Subject: Moved to csu/errno-loc.c. --- math/w_log2.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 math/w_log2.c (limited to 'math/w_log2.c') 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 +#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 -- cgit 1.4.1