1 /* Set current rounding direction. 2 Copyright (C) 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 <fpu_control.h> 21 22 int __fesetround(int round)23__fesetround (int round) 24 { 25 fpu_control_t cw; 26 27 if ((round & ~_FPU_RC_MASK) != 0) 28 /* ROUND is no valid rounding mode. */ 29 return 1; 30 31 /* Get current state. */ 32 _FPU_GETCW (cw); 33 34 /* Set rounding bits. */ 35 cw &= ~_FPU_RC_MASK; 36 cw |= round; 37 /* Set new state. */ 38 _FPU_SETCW (cw); 39 40 return 0; 41 } 42 43 libm_hidden_def (__fesetround) weak_alias (__fesetround, fesetround) 44 libm_hidden_weak (fesetround) 45