| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 2011-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. |
| 4 | |
| 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. |
| 9 | |
| 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. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | /* |
| 20 | * wrapper atan2(y,x) |
| 21 | */ |
| 22 | |
| 23 | #include <errno.h> |
| 24 | #include <math.h> |
| 25 | #include <math_private.h> |
| 26 | |
| 27 | |
| 28 | double |
| 29 | __atan2 (double y, double x) |
| 30 | { |
| 31 | double z; |
| 32 | |
| 33 | if (__builtin_expect (x == 0.0 && y == 0.0, 0) && _LIB_VERSION == _SVID_) |
| 34 | return __kernel_standard (y, x, 3); /* atan2(+-0,+-0) */ |
| 35 | |
| 36 | z = __ieee754_atan2 (y, x); |
| 37 | if (__glibc_unlikely (z == 0.0 && y != 0.0 && isfinite (x))) |
| 38 | __set_errno (ERANGE); |
| 39 | return z; |
| 40 | } |
| 41 | weak_alias (__atan2, atan2) |
| 42 | #ifdef NO_LONG_DOUBLE |
| 43 | strong_alias (__atan2, __atan2l) |
| 44 | weak_alias (__atan2, atan2l) |
| 45 | #endif |