1 /* Set floating-point environment exception handling. 2 Copyright (C) 2018-2025 Free Software Foundation, Inc. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library. If not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #include <fenv.h> 19 #include <fpu_control.h> 20 #include "fenv_libc.h" 21 22 int fesetexceptflag(const fexcept_t * flagp,int excepts)23fesetexceptflag (const fexcept_t *flagp, int excepts) 24 { 25 fpu_control_t temp; 26 27 /* Get the current exceptions. */ 28 _FPU_GETFPSR (temp); 29 30 /* Make sure the flags we want restored are legal. */ 31 excepts &= FE_ALL_EXCEPT; 32 33 /* Now clear the bits called for, and copy them in from flagp. Note that 34 we ignore all non-flag bits from *flagp, so they don't matter. */ 35 temp = ((temp >> CAUSE_SHIFT) & ~excepts) | (*flagp & excepts); 36 temp = temp << CAUSE_SHIFT; 37 38 _FPU_SETFPSR (temp); 39 40 /* Success. */ 41 return 0; 42 } 43