1 /* Clear given exceptions in current floating-point environment. 2 Copyright (C) 2000-2022 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 feclearexcept(int excepts)23feclearexcept (int excepts) 24 { 25 fexcept_t temp; 26 27 /* Mask out unsupported bits/exceptions. */ 28 excepts &= FE_ALL_EXCEPT; 29 30 _FPU_GETCW (temp); 31 /* Clear the relevant bits. */ 32 temp &= ~(excepts << FPC_FLAGS_SHIFT); 33 if ((temp & FPC_NOT_FPU_EXCEPTION) == 0) 34 /* Bits 6, 7 of dxc-byte are zero, 35 thus bits 0-5 of dxc-byte correspond to the flag-bits. 36 Clear the relevant bits in flags and dxc-field. */ 37 temp &= ~(excepts << FPC_DXC_SHIFT); 38 39 /* Put the new data in effect. */ 40 _FPU_SETCW (temp); 41 42 /* Success. */ 43 return 0; 44 } 45 libm_hidden_def (feclearexcept) 46