diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/wordsize-64/s_logb.c')
-rw-r--r-- | sysdeps/ieee754/dbl-64/wordsize-64/s_logb.c | 47 |
1 files changed, 0 insertions, 47 deletions
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_logb.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_logb.c deleted file mode 100644 index d9b40af2c7..0000000000 --- a/sysdeps/ieee754/dbl-64/wordsize-64/s_logb.c +++ /dev/null @@ -1,47 +0,0 @@ -/* Compute radix independent exponent. - Copyright (C) 2011-2019 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <math.h> - -#include <math_private.h> -#include <libm-alias-double.h> - - -double -__logb (double x) -{ - int64_t ix, ex; - - EXTRACT_WORDS64 (ix, x); - ix &= UINT64_C(0x7fffffffffffffff); - if (ix == 0) - return -1.0 / fabs (x); - ex = ix >> 52; - if (ex == 0x7ff) - return x * x; - if (__glibc_unlikely (ex == 0)) - { - int m = __builtin_clzll (ix); - ex -= m - 12; - } - return (double) (ex - 1023); -} -#ifndef __logb -libm_alias_double (__logb, logb) -#endif |