| 1 | /* Copyright (C) 2011-2024 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | /* |
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| 19 | * wrapper atan2f(y,x) |
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| 20 | */ |
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| 21 | |
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| 22 | #include <errno.h> |
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| 23 | #include <math.h> |
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| 24 | #include <math_private.h> |
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| 25 | #include <math-svid-compat.h> |
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| 26 | #include <libm-alias-float.h> |
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| 27 | |
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| 28 | |
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| 29 | #if LIBM_SVID_COMPAT |
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| 30 | float |
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| 31 | __atan2f (float y, float x) |
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| 32 | { |
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| 33 | float z; |
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| 34 | |
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| 35 | if (__builtin_expect (x == 0.0f && y == 0.0f, 0) && _LIB_VERSION == _SVID_) |
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| 36 | return __kernel_standard_f (y, x, 103); /* atan2(+-0,+-0) */ |
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| 37 | |
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| 38 | z = __ieee754_atan2f (y, x); |
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| 39 | if (__glibc_unlikely (z == 0.0f && y != 0.0f && isfinite (x))) |
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| 40 | __set_errno (ERANGE); |
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| 41 | return z; |
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| 42 | } |
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| 43 | libm_alias_float (__atan2, atan2) |
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| 44 | #endif |
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| 45 | |
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