1 /* Store current floating-point environment and clear exceptions. 2 Copyright (C) 1997-2022 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_libc.h> 20 #include <fpu_control.h> 21 22 int __feholdexcept(fenv_t * envp)23__feholdexcept (fenv_t *envp) 24 { 25 fenv_union_t old, new; 26 27 /* Save the currently set exceptions. */ 28 old.fenv = *envp = fegetenv_register (); 29 30 /* Clear everything except for the rounding modes and non-IEEE arithmetic 31 flag. */ 32 new.l = old.l & 0xffffffff00000007LL; 33 34 if (new.l == old.l) 35 return 0; 36 37 __TEST_AND_ENTER_NON_STOP (old.l, 0ULL); 38 39 /* Put the new state in effect. */ 40 fesetenv_register (new.fenv); 41 42 return 0; 43 } 44 libm_hidden_def (__feholdexcept) 45 weak_alias (__feholdexcept, feholdexcept) 46 libm_hidden_weak (feholdexcept) 47