diff options
Diffstat (limited to 'REORG.TODO/math/w_pow_compat.c')
| -rw-r--r-- | REORG.TODO/math/w_pow_compat.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/REORG.TODO/math/w_pow_compat.c b/REORG.TODO/math/w_pow_compat.c new file mode 100644 index 0000000000..0e24b755b2 --- /dev/null +++ b/REORG.TODO/math/w_pow_compat.c @@ -0,0 +1,64 @@ +/* Copyright (C) 2011-2017 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> + + +/* wrapper pow */ +double +__pow (double x, double y) +{ + double z = __ieee754_pow (x, y); + if (__glibc_unlikely (!isfinite (z))) + { + if (_LIB_VERSION != _IEEE_) + { + if (isfinite (x) && isfinite (y)) + { + if (isnan (z)) + /* pow neg**non-int */ + return __kernel_standard (x, y, 24); + else if (x == 0.0 && y < 0.0) + { + if (signbit (x) && signbit (z)) + /* pow(-0.0,negative) */ + return __kernel_standard (x, y, 23); + else + /* pow(+0.0,negative) */ + return __kernel_standard (x, y, 43); + } + else + /* pow overflow */ + return __kernel_standard (x, y, 21); + } + } + } + else if (__builtin_expect (z == 0.0, 0) + && isfinite (x) && x != 0 && isfinite (y) + && _LIB_VERSION != _IEEE_) + /* pow underflow */ + return __kernel_standard (x, y, 22); + + return z; +} +weak_alias (__pow, pow) +#ifdef NO_LONG_DOUBLE +strong_alias (__pow, __powl) +weak_alias (__pow, powl) +#endif |