sysdeps/or1k/bits/fenv.h

   1 /* Floating point environment, OpenRISC version.
   2    Copyright (C) 2022-2023 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