1 /* Determine floating-point rounding mode within libc. ARM version. 2 Copyright (C) 2012-2022 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 #ifndef _ARM_GET_ROUNDING_MODE_H 20 #define _ARM_GET_ROUNDING_MODE_H 1 21 22 #include <arm-features.h> 23 #include <fenv.h> 24 #include <fpu_control.h> 25 26 /* Return the floating-point rounding mode. */ 27 28 static inline int get_rounding_mode(void)29get_rounding_mode (void) 30 { 31 fpu_control_t fpscr; 32 33 /* FE_TONEAREST is the only supported rounding mode 34 if a VFP unit isn't present. */ 35 if (!ARM_HAVE_VFP) 36 return FE_TONEAREST; 37 38 _FPU_GETCW (fpscr); 39 return fpscr & _FPU_MASK_RM; 40 } 41 42 #endif /* get-rounding-mode.h */ 43