1 /* Raise given exceptions. 2 Copyright (C) 2000-2021 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 <fenv_libc.h> 21 #include <fpu_control.h> 22 23 int __feraiseexcept(int excepts)24__feraiseexcept (int excepts) 25 { 26 fpu_control_t cw; 27 28 /* Get current state. */ 29 _FPU_GETCW (cw); 30 31 /* Set flag bits (which are accumulative), and *also* set the 32 cause bits. The setting of the cause bits is what actually causes 33 the hardware to generate the exception, if the corresponding enable 34 bit is set as well. */ 35 36 excepts &= FE_ALL_EXCEPT; 37 cw |= excepts | (excepts << CAUSE_SHIFT); 38 39 /* Set new state. */ 40 _FPU_SETCW (cw); 41 42 return 0; 43 } 44 45 libm_hidden_def (__feraiseexcept) 46 weak_alias (__feraiseexcept, feraiseexcept) 47 libm_hidden_weak (feraiseexcept) 48