| 1 | /* Install given floating-point environment and raise exceptions, |
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| 2 | without clearing currently raised exceptions. |
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| 3 | Copyright (C) 2020-2024 Free Software Foundation, Inc. |
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| 4 | This file is part of the GNU C Library. |
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| 5 | |
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| 6 | The GNU C Library is free software; you can redistribute it and/or |
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| 7 | modify it under the terms of the GNU Lesser General Public |
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| 8 | License as published by the Free Software Foundation; either |
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| 9 | version 2.1 of the License, or (at your option) any later version. |
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| 10 | |
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| 11 | The GNU C Library is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | Lesser General Public License for more details. |
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| 15 | |
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| 16 | You should have received a copy of the GNU Lesser General Public |
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| 17 | License along with the GNU C Library. If not, see |
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| 18 | <https://www.gnu.org/licenses/>. */ |
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| 19 | |
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| 20 | #include <fenv.h> |
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| 21 | #include <fpu_control.h> |
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| 22 | |
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| 23 | int |
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| 24 | __feupdateenv (const fenv_t *envp) |
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| 25 | { |
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| 26 | unsigned int fpcr; |
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| 27 | unsigned int fpsr; |
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| 28 | |
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| 29 | _FPU_GETS (fpsr); |
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| 30 | |
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| 31 | if (envp == FE_DFL_ENV) |
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| 32 | { |
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| 33 | fpcr = _FPU_DEFAULT; |
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| 34 | } |
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| 35 | else |
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| 36 | { |
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| 37 | fpcr = envp->__fpcr; |
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| 38 | |
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| 39 | /* currently raised exceptions need to be preserved. */ |
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| 40 | fpsr |= envp->__fpsr; |
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| 41 | } |
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| 42 | |
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| 43 | _FPU_SETCW (fpcr); |
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| 44 | _FPU_SETS (fpsr); |
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| 45 | |
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| 46 | /* Success. */ |
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| 47 | return 0; |
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| 48 | } |
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| 49 | libm_hidden_def (__feupdateenv) |
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| 50 | weak_alias (__feupdateenv, feupdateenv) |
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| 51 | libm_hidden_weak (feupdateenv) |
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| 52 | |
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