| 1 | /* Install given floating-point environment. |
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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 <fenv.h> |
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| 20 | #include <fpu_control.h> |
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| 21 | |
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| 22 | int |
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| 23 | __fesetenv (const fenv_t *envp) |
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| 24 | { |
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| 25 | unsigned int fpcr; |
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| 26 | unsigned int fpsr; |
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| 27 | |
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| 28 | _FPU_GETCW (fpcr); |
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| 29 | _FPU_GETFPSR (fpsr); |
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| 30 | |
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| 31 | fpcr &= _FPU_RESERVED; |
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| 32 | fpsr &= _FPU_FPSR_RESERVED; |
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| 33 | |
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| 34 | if (envp == FE_DFL_ENV) |
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| 35 | { |
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| 36 | fpcr |= _FPU_DEFAULT; |
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| 37 | fpsr |= _FPU_FPSR_DEFAULT; |
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| 38 | } |
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| 39 | else if (envp == FE_NOMASK_ENV) |
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| 40 | { |
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| 41 | fpcr |= _FPU_FPCR_IEEE; |
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| 42 | fpsr |= _FPU_FPSR_IEEE; |
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| 43 | } |
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| 44 | else |
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| 45 | { |
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| 46 | fpcr |= envp->__fpcr & ~_FPU_RESERVED; |
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| 47 | fpsr |= envp->__fpsr & ~_FPU_FPSR_RESERVED; |
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| 48 | } |
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| 49 | |
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| 50 | _FPU_SETFPSR (fpsr); |
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| 51 | |
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| 52 | _FPU_SETCW (fpcr); |
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| 53 | |
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| 54 | /* Success. */ |
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| 55 | return 0; |
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| 56 | } |
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| 57 | libm_hidden_def (__fesetenv) |
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| 58 | weak_alias (__fesetenv, fesetenv) |
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| 59 | libm_hidden_weak (fesetenv) |
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| 60 | |
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