| /* 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 powf */ |
| float |
| __powf (float x, float y) |
| { |
| float z = __ieee754_powf (x, y); |
| if (__builtin_expect (!__finitef (z), 0)) |
| { |
| if (_LIB_VERSION != _IEEE_) |
| { |
| if (__isnanf (x)) |
| { |
| if (y == 0.0f) |
| /* pow(NaN,0.0) */ |
| return __kernel_standard_f (x, y, 142); |
| } |
| else if (__finitef (x) && __finitef (y)) |
| { |
| if (__isnanf (z)) |
| /* pow neg**non-int */ |
| return __kernel_standard_f (x, y, 124); |
| else if (x == 0.0f && y < 0.0f) |
| { |
| if (signbit (x) && signbit (z)) |
| /* pow(-0.0,negative) */ |
| return __kernel_standard_f (x, y, 123); |
| else |
| /* pow(+0.0,negative) */ |
| return __kernel_standard_f (x, y, 143); |
| } |
| else |
| /* pow overflow */ |
| return __kernel_standard_f (x, y, 121); |
| } |
| } |
| } |
| else if (__builtin_expect (z == 0.0f, 0) && __finitef (x) && __finitef (y) |
| && _LIB_VERSION != _IEEE_) |
| { |
| if (x == 0.0f) |
| { |
| if (y == 0.0f) |
| /* pow(0.0,0.0) */ |
| return __kernel_standard_f (x, y, 120); |
| } |
| else |
| /* pow underflow */ |
| return __kernel_standard_f (x, y, 122); |
| } |
| |
| return z; |
| } |
| weak_alias (__powf, powf) |
