1 /* Copyright (C) 2012-2021 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 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 #ifndef _FENV_H 19 # error "Never use <bits/fenv.h> directly; include <fenv.h> instead." 20 #endif 21 22 /* The Altera specified Nios II hardware FPU does not support exceptions, 23 nor does the software floating-point support. */ 24 #define FE_ALL_EXCEPT 0 25 26 /* Nios II supports only round-to-nearest. The software 27 floating-point support also acts this way. */ 28 enum 29 { 30 __FE_UNDEFINED = 0, 31 32 FE_TONEAREST = 33 #define FE_TONEAREST 1 34 FE_TONEAREST, 35 }; 36 37 /* Type representing exception flags. */ 38 typedef unsigned int fexcept_t; 39 40 /* Type representing floating-point environment. */ 41 typedef unsigned int fenv_t; 42 43 /* If the default argument is used we use this value. */ 44 #define FE_DFL_ENV ((const fenv_t *) -1) 45 46 #if __GLIBC_USE (IEC_60559_BFP_EXT_C2X) 47 /* Type representing floating-point control modes. */ 48 typedef unsigned int femode_t; 49 50 /* Default floating-point control modes. */ 51 # define FE_DFL_MODE ((const femode_t *) -1L) 52 #endif 53