diff options
Diffstat (limited to 'REORG.TODO/math/w_atan2_compat.c')
| -rw-r--r-- | REORG.TODO/math/w_atan2_compat.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/REORG.TODO/math/w_atan2_compat.c b/REORG.TODO/math/w_atan2_compat.c new file mode 100644 index 0000000000..cceb602258 --- /dev/null +++ b/REORG.TODO/math/w_atan2_compat.c @@ -0,0 +1,45 @@ +/* Copyright (C) 2011-2017 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/>. */ + +/* + * wrapper atan2(y,x) + */ + +#include <errno.h> +#include <math.h> +#include <math_private.h> + + +double +__atan2 (double y, double x) +{ + double z; + + if (__builtin_expect (x == 0.0 && y == 0.0, 0) && _LIB_VERSION == _SVID_) + return __kernel_standard (y, x, 3); /* atan2(+-0,+-0) */ + + z = __ieee754_atan2 (y, x); + if (__glibc_unlikely (z == 0.0 && y != 0.0 && isfinite (x))) + __set_errno (ERANGE); + return z; +} +weak_alias (__atan2, atan2) +#ifdef NO_LONG_DOUBLE +strong_alias (__atan2, __atan2l) +weak_alias (__atan2, atan2l) +#endif |