fenv.h (2096B) - Raw
1 /* Floating point environment. ARC version. 2 Copyright (C) 2020-2025 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 _FENV_H 20 # error "Never use <bits/fenv.h> directly; include <fenv.h> instead." 21 #endif 22 23 enum 24 { 25 FE_INVALID = 26 # define FE_INVALID (0x01) 27 FE_INVALID, 28 FE_DIVBYZERO = 29 # define FE_DIVBYZERO (0x02) 30 FE_DIVBYZERO, 31 FE_OVERFLOW = 32 # define FE_OVERFLOW (0x04) 33 FE_OVERFLOW, 34 FE_UNDERFLOW = 35 # define FE_UNDERFLOW (0x08) 36 FE_UNDERFLOW, 37 FE_INEXACT = 38 # define FE_INEXACT (0x10) 39 FE_INEXACT 40 }; 41 42 # define FE_ALL_EXCEPT \ 43 (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT) 44 45 enum 46 { 47 FE_TOWARDZERO = 48 # define FE_TOWARDZERO (0x0) 49 FE_TOWARDZERO, 50 FE_TONEAREST = 51 # define FE_TONEAREST (0x1) /* default */ 52 FE_TONEAREST, 53 FE_UPWARD = 54 # define FE_UPWARD (0x2) 55 FE_UPWARD, 56 FE_DOWNWARD = 57 # define FE_DOWNWARD (0x3) 58 FE_DOWNWARD 59 }; 60 61 typedef unsigned int fexcept_t; 62 63 typedef struct 64 { 65 unsigned int __fpcr; 66 unsigned int __fpsr; 67 } fenv_t; 68 69 /* If the default argument is used we use this value. */ 70 #define FE_DFL_ENV ((const fenv_t *) -1) 71 72 #if __GLIBC_USE (IEC_60559_BFP_EXT_C23) 73 /* Type representing floating-point control modes. */ 74 typedef unsigned int femode_t; 75 76 /* Default floating-point control modes. */ 77 # define FE_DFL_MODE ((const femode_t *) -1L) 78 #endif