1 /* Install given floating-point environment and raise exceptions. 2 Copyright (C) 2018-2022 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library. If not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #include <fenv.h> 20 #include <fpu_control.h> 21 #include <fenv_libc.h> 22 #include <fenv_private.h> 23 #include <stdio.h> 24 25 int __feupdateenv(const fenv_t * envp)26__feupdateenv (const fenv_t *envp) 27 { 28 int temp; 29 30 /* Save current exceptions. */ 31 _FPU_GETFPSR (temp); 32 temp = (temp >> CAUSE_SHIFT) & FE_ALL_EXCEPT; 33 /* Install new environment. */ 34 __fesetenv (envp); 35 36 /* Raise the safed exception. Incidently for us the implementation 37 defined format of the values in objects of type fexcept_t is the 38 same as the ones specified using the FE_* constants. */ 39 feraiseexcept (temp); 40 41 /* Success. */ 42 return 0; 43 } 44 libm_hidden_def (__feupdateenv) 45 weak_alias (__feupdateenv, feupdateenv) 46 libm_hidden_weak (feupdateenv) 47