| 1 | /* Subtract _Float128 values, converting the result to _Float64x. |
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| 2 | Copyright (C) 2018-2022 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 <math.h> |
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| 20 | #include <math-narrow.h> |
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| 21 | |
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| 22 | /* math_ldbl.h defines _Float128 to long double for this directory, |
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| 23 | but when they are different, this function must be defined with |
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| 24 | _Float128 arguments to avoid defining an alias with an incompatible |
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| 25 | type. */ |
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| 26 | #undef _Float128 |
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| 27 | |
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| 28 | _Float64x |
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| 29 | __f64xsubf128 (_Float128 x, _Float128 y) |
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| 30 | { |
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| 31 | #if __HAVE_FLOAT64X_LONG_DOUBLE && __HAVE_DISTINCT_FLOAT128 |
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| 32 | NARROW_SUB_ROUND_TO_ODD (x, y, _Float64x, union ieee854_long_double, l, |
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| 33 | mantissa3); |
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| 34 | #else |
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| 35 | NARROW_SUB_TRIVIAL (x, y, _Float64x); |
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| 36 | #endif |
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| 37 | } |
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| 38 | libm_alias_float64x_float128 (sub) |
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| 39 | |
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