sysdeps/riscv/bits/fenv.h

   1 /* Floating point environment, RISC-V version.
   2    Copyright (C) 1998-2019 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_INEXACT   =
  26 #define FE_INEXACT      (0x01)
  27       FE_INEXACT,
  28     FE_UNDERFLOW =
  29 #define FE_UNDERFLOW    (0x02)
  30       FE_UNDERFLOW,
  31     FE_OVERFLOW  =
  32 #define FE_OVERFLOW     (0x04)
  33       FE_OVERFLOW,
  34     FE_DIVBYZERO =
  35 #define FE_DIVBYZERO    (0x08)
  36       FE_DIVBYZERO,
  37     FE_INVALID   =
  38 #define FE_INVALID      (0x10)
  39       FE_INVALID
  40   };
  41
  42 #define FE_ALL_EXCEPT \
  43         (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
  44
  45 enum
  46   {
  47     FE_TONEAREST  =
  48 #define FE_TONEAREST    (0x0)
  49       FE_TONEAREST,
  50     FE_TOWARDZERO =
  51 #define FE_TOWARDZERO   (0x1)
  52       FE_TOWARDZERO,
  53     FE_DOWNWARD   =
  54 #define FE_DOWNWARD     (0x2)
  55       FE_DOWNWARD,
  56     FE_UPWARD     =
  57 #define FE_UPWARD       (0x3)
  58       FE_UPWARD
  59   };
  60
  61
  62 typedef unsigned int fexcept_t;
  63 typedef unsigned int fenv_t;
  64
  65 /* If the default argument is used we use this value.  */
  66 #define FE_DFL_ENV      ((__const fenv_t *) -1)
  67
  68 #if __GLIBC_USE (IEC_60559_BFP_EXT_C2X)
  69 /* Type representing floating-point control modes.  */
  70 typedef unsigned int femode_t;
  71
  72 /* Default floating-point control modes.  */
  73 # define FE_DFL_MODE    ((const femode_t *) -1L)
  74 #endif