1 /* Floating point environment, OpenRISC version. 2 Copyright (C) 2022 Free Software Foundation, Inc. 3 4 This file is part of the GNU C Library. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public License as 8 published by the Free Software Foundation; either version 2.1 of the 9 License, or (at your option) any later version. 10 11 The GNU C Library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with the GNU C Library; if not, see 18 <https://www.gnu.org/licenses/>. */ 19 20 #ifndef _FENV_H 21 # error "Never use <bits/fenv.h> directly; include <fenv.h> instead." 22 #endif 23 24 /* Define bits representing exceptions in the FPCSR status word. */ 25 enum 26 { 27 FE_OVERFLOW = 28 #define FE_OVERFLOW (1 << 3) 29 FE_OVERFLOW, 30 FE_UNDERFLOW = 31 #define FE_UNDERFLOW (1 << 4) 32 FE_UNDERFLOW, 33 FE_INEXACT = 34 #define FE_INEXACT (1 << 8) 35 FE_INEXACT, 36 FE_INVALID = 37 #define FE_INVALID (1 << 9) 38 FE_INVALID, 39 FE_DIVBYZERO = 40 #define FE_DIVBYZERO (1 << 11) 41 FE_DIVBYZERO, 42 }; 43 44 /* All supported exceptions. */ 45 #define FE_ALL_EXCEPT \ 46 (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT) 47 48 /* Define bits representing rounding modes in the FPCSR Rmode field. */ 49 #define FE_TONEAREST (0x0 << 1) 50 #define FE_TOWARDZERO (0x1 << 1) 51 #define FE_UPWARD (0x2 << 1) 52 #define FE_DOWNWARD (0x3 << 1) 53 54 /* Type representing exception flags. */ 55 typedef unsigned int fexcept_t; 56 57 /* Type representing floating-point environment. */ 58 typedef unsigned int fenv_t; 59 60 /* If the default argument is used we use this value. */ 61 #define FE_DFL_ENV ((const fenv_t *) -1l) 62 63 #if __GLIBC_USE (IEC_60559_BFP_EXT) 64 /* Type representing floating-point control modes. */ 65 typedef unsigned int femode_t; 66 67 /* Default floating-point control modes. */ 68 # define FE_DFL_MODE ((const femode_t *) -1L) 69 #endif 70