1 /* Set current rounding direction. 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.h> 20 #include <fenv_private.h> 21 22 int __fesetround(int round)23__fesetround (int round) 24 { 25 fenv_t tmp; 26 27 if ((round & ~__FE_ROUND_MASK) != 0) 28 /* ROUND is no valid rounding mode. */ 29 return 1; 30 31 __fenv_stfsr (tmp); 32 tmp &= ~__FE_ROUND_MASK; 33 tmp |= round; 34 __fenv_ldfsr (tmp); 35 36 return 0; 37 } 38 libm_hidden_def (__fesetround) 39 weak_alias (__fesetround, fesetround) 40 libm_hidden_weak (fesetround) 41