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581c785b | 1 | /* Copyright (C) 2011-2022 Free Software Foundation, Inc. |
0ac5ae23 | 2 | This file is part of the GNU C Library. |
f7eac6eb | 3 | |
0ac5ae23 UD |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
f7eac6eb | 17 | |
cccda09f | 18 | /* |
f7eac6eb RM |
19 | * wrapper atan2(y,x) |
20 | */ | |
21 | ||
54fa2475 | 22 | #include <errno.h> |
9d13fb24 | 23 | #include <math.h> |
9277c064 | 24 | #include <math_private.h> |
813378e9 | 25 | #include <math-svid-compat.h> |
9ac44708 | 26 | #include <libm-alias-double.h> |
f7eac6eb RM |
27 | |
28 | ||
4f3647e4 | 29 | #if LIBM_SVID_COMPAT |
0ac5ae23 UD |
30 | double |
31 | __atan2 (double y, double x) | |
f7eac6eb | 32 | { |
54fa2475 JM |
33 | double z; |
34 | ||
0ac5ae23 UD |
35 | if (__builtin_expect (x == 0.0 && y == 0.0, 0) && _LIB_VERSION == _SVID_) |
36 | return __kernel_standard (y, x, 3); /* atan2(+-0,+-0) */ | |
37 | ||
54fa2475 | 38 | z = __ieee754_atan2 (y, x); |
d81f90cc | 39 | if (__glibc_unlikely (z == 0.0 && y != 0.0 && isfinite (x))) |
54fa2475 JM |
40 | __set_errno (ERANGE); |
41 | return z; | |
f7eac6eb | 42 | } |
9ac44708 | 43 | libm_alias_double (__atan2, atan2) |
cccda09f | 44 | #endif |