| 1 | /* Return positive difference between arguments. |
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| 2 | Copyright (C) 1997-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <errno.h> |
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| 20 | #include <math.h> |
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| 21 | #include <math-narrow-eval.h> |
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| 22 | |
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| 23 | FLOAT |
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| 24 | M_DECL_FUNC (__fdim) (FLOAT x, FLOAT y) |
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| 25 | { |
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| 26 | if (islessequal (x, y)) |
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| 27 | return 0; |
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| 28 | |
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| 29 | FLOAT r = math_narrow_eval (x - y); |
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| 30 | if (isinf (r) && !isinf (x) && !isinf (y)) |
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| 31 | __set_errno (ERANGE); |
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| 32 | |
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| 33 | return r; |
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| 34 | } |
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| 35 | declare_mgen_alias (__fdim, fdim); |
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| 36 | |
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