| 1 | /* long double square root in software floating-point emulation. |
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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 <stdlib.h> |
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| 20 | #include <soft-fp.h> |
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| 21 | #include <quad.h> |
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| 22 | #include <libm-alias-finite.h> |
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| 23 | |
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| 24 | long double |
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| 25 | __ieee754_sqrtl (const long double a) |
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| 26 | { |
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| 27 | FP_DECL_EX; |
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| 28 | FP_DECL_Q(A); FP_DECL_Q(C); |
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| 29 | long double c; |
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| 30 | |
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| 31 | FP_INIT_ROUNDMODE; |
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| 32 | FP_UNPACK_Q(A, a); |
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| 33 | FP_SQRT_Q(C, A); |
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| 34 | FP_PACK_Q(c, C); |
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| 35 | FP_HANDLE_EXCEPTIONS; |
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| 36 | return c; |
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| 37 | } |
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| 38 | libm_alias_finite (__ieee754_sqrtl, __sqrtl) |
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| 39 | |
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