ports/sysdeps/am33/fpu/bits/fenv.h

   1 /* Copyright (C) 1998-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Alexandre Oliva <aoliva@redhat.com>
   4    based on the corresponding file in the mips port.
   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
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the 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    <http://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
  25 /* Define bits representing the exception.  We use the EF bit
  26    positions of the appropriate bits in the FPCR register.  */
  27 enum
  28   {
  29     FE_INEXACT =
  30 #define FE_INEXACT      0x01
  31       FE_INEXACT,
  32     FE_UNDERFLOW =
  33 #define FE_UNDERFLOW    0x02
  34       FE_UNDERFLOW,
  35     FE_OVERFLOW =
  36 #define FE_OVERFLOW     0x04
  37       FE_OVERFLOW,
  38     FE_DIVBYZERO =
  39 #define FE_DIVBYZERO    0x08
  40       FE_DIVBYZERO,
  41     FE_INVALID =
  42 #define FE_INVALID      0x10
  43       FE_INVALID,
  44   };
  45
  46 #define FE_ALL_EXCEPT \
  47         (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
  48
  49 /* The AM33/2.0 FPU supports only Round to nearest.  Bits 3<<16 are
  50    reserved to represent other rounding modes.  */
  51 enum
  52   {
  53     FE_TONEAREST =
  54 #define FE_TONEAREST    0x00000
  55       FE_TONEAREST,
  56   };
  57
  58
  59 /* Type representing exception flags.  */
  60 typedef unsigned int fexcept_t;
  61
  62
  63 /* Type representing floating-point environment.  */
  64 typedef unsigned int fenv_t;
  65
  66 /* If the default argument is used we use this value.  */
  67 #define FE_DFL_ENV      ((__const fenv_t *) -1)
  68
  69 #ifdef __USE_GNU
  70 /* Floating-point environment where none of the exception is masked.  */
  71 # define FE_NOMASK_ENV  ((__const fenv_t *) -2)
  72 #endif