| /* Copyright (C) 2011-2014 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 powl */ |
| long double |
| __powl (long double x, long double y) |
| { |
| long double z = __ieee754_powl (x, y); |
| if (__builtin_expect (!__finitel (z), 0)) |
| { |
| if (_LIB_VERSION != _IEEE_) |
| { |
| if (__isnanl (x)) |
| { |
| if (y == 0.0L) |
| /* pow(NaN,0.0) */ |
| return __kernel_standard_l (x, y, 242); |
| } |
| else if (__finitel (x) && __finitel (y)) |
| { |
| if (__isnanl (z)) |
| /* pow neg**non-int */ |
| return __kernel_standard_l (x, y, 224); |
| else if (x == 0.0L && y < 0.0L) |
| { |
| if (signbit (x) && signbit (z)) |
| /* pow(-0.0,negative) */ |
| return __kernel_standard_l (x, y, 223); |
| else |
| /* pow(+0.0,negative) */ |
| return __kernel_standard_l (x, y, 243); |
| } |
| else |
| /* pow overflow */ |
| return __kernel_standard_l (x, y, 221); |
| } |
| } |
| } |
| else if (__builtin_expect (z == 0.0L, 0) && __finitel (x) && __finitel (y) |
| && _LIB_VERSION != _IEEE_) |
| { |
| if (x == 0.0L) |
| { |
| if (y == 0.0L) |
| /* pow(0.0,0.0) */ |
| return __kernel_standard_l (x, y, 220); |
| } |
| else |
| /* pow underflow */ |
| return __kernel_standard_l (x, y, 222); |
| } |
| |
| return z; |
| } |
| weak_alias (__powl, powl) |
