| 1 | /* Clear given exceptions in current floating-point environment. |
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| 2 | Copyright (C) 2000-2024 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 <fenv.h> |
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| 20 | |
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| 21 | int |
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| 22 | feclearexcept (int excepts) |
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| 23 | { |
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| 24 | union { unsigned long long l; unsigned int sw[2]; } s; |
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| 25 | |
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| 26 | /* Get the current status word. */ |
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| 27 | __asm__ ("fstd %%fr0,0(%1)" : "=m" (s.l) : "r" (&s.l) : "%r0" ); |
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| 28 | /* Clear all the relevant bits. */ |
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| 29 | s.sw[0] &= ~(((unsigned int) excepts & FE_ALL_EXCEPT) << 27); |
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| 30 | __asm__ ("fldd 0(%0),%%fr0" : : "r" (&s.l), "m" (s.l) : "%r0" ); |
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| 31 | |
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| 32 | /* Success. */ |
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| 33 | return 0; |
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| 34 | } |
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| 35 | libm_hidden_def (feclearexcept) |
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| 36 | |
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