projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| f7a9f785 | 1 | /* Copyright (C) 2011-2016 Free Software Foundation, Inc. |
| 0ac5ae23 UD |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. | |
| f7eac6eb | 4 | |
| 0ac5ae23 UD |
5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| f7eac6eb | 9 | |
| 0ac5ae23 UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| f7eac6eb | 14 | |
| 0ac5ae23 | 15 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| f7eac6eb | 18 | |
| 9d13fb24 | 19 | #include <math.h> |
| 9277c064 | 20 | #include <math_private.h> |
| f7eac6eb RM |
21 | |
| 22 | ||
| 0ac5ae23 UD |
23 | /* wrapper powf */ |
| 24 | float | |
| 25 | __powf (float x, float y) | |
| f7eac6eb | 26 | { |
| 0ac5ae23 | 27 | float z = __ieee754_powf (x, y); |
| d81f90cc | 28 | if (__glibc_unlikely (!isfinite (z))) |
| 0ac5ae23 UD |
29 | { |
| 30 | if (_LIB_VERSION != _IEEE_) | |
| 31 | { | |
| d81f90cc | 32 | if (isnan (x)) |
| 0ac5ae23 UD |
33 | { |
| 34 | if (y == 0.0f) | |
| 35 | /* pow(NaN,0.0) */ | |
| 36 | return __kernel_standard_f (x, y, 142); | |
| 37 | } | |
| d81f90cc | 38 | else if (isfinite (x) && isfinite (y)) |
| 0ac5ae23 | 39 | { |
| d81f90cc | 40 | if (isnan (z)) |
| 0ac5ae23 UD |
41 | /* pow neg**non-int */ |
| 42 | return __kernel_standard_f (x, y, 124); | |
| 43 | else if (x == 0.0f && y < 0.0f) | |
| 44 | { | |
| 45 | if (signbit (x) && signbit (z)) | |
| 46 | /* pow(-0.0,negative) */ | |
| 47 | return __kernel_standard_f (x, y, 123); | |
| 48 | else | |
| 49 | /* pow(+0.0,negative) */ | |
| 50 | return __kernel_standard_f (x, y, 143); | |
| 51 | } | |
| 0d8733c4 | 52 | else |
| 0ac5ae23 UD |
53 | /* pow overflow */ |
| 54 | return __kernel_standard_f (x, y, 121); | |
| 7ef90c15 | 55 | } |
| f7eac6eb | 56 | } |
| 0ac5ae23 | 57 | } |
| d81f90cc | 58 | else if (__builtin_expect (z == 0.0f, 0) && isfinite (x) && isfinite (y) |
| 0ac5ae23 UD |
59 | && _LIB_VERSION != _IEEE_) |
| 60 | { | |
| 61 | if (x == 0.0f) | |
| 62 | { | |
| 63 | if (y == 0.0f) | |
| 64 | /* pow(0.0,0.0) */ | |
| 65 | return __kernel_standard_f (x, y, 120); | |
| 0d8733c4 | 66 | } |
| 0ac5ae23 UD |
67 | else |
| 68 | /* pow underflow */ | |
| 69 | return __kernel_standard_f (x, y, 122); | |
| 70 | } | |
| 71 | ||
| 72 | return z; | |
| f7eac6eb RM |
73 | } |
| 74 | weak_alias (__powf, powf) |