sysdeps/am33/fpu/bits/fenv.h

   1 /* Copyright (C) 1998, 1999, 2000, 2004 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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #ifndef _FENV_H
  22 # error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
  23 #endif
  24
  25
  26 /* Define bits representing the exception.  We use the EF bit
  27    positions of the appropriate bits in the FPCR register.  */
  28 enum
  29   {
  30     FE_INEXACT = 0x01,
  31 #define FE_INEXACT      FE_INEXACT
  32     FE_UNDERFLOW = 0x02,
  33 #define FE_UNDERFLOW    FE_UNDERFLOW
  34     FE_OVERFLOW = 0x04,
  35 #define FE_OVERFLOW     FE_OVERFLOW
  36     FE_DIVBYZERO = 0x08,
  37 #define FE_DIVBYZERO    FE_DIVBYZERO
  38     FE_INVALID = 0x10,
  39 #define FE_INVALID      FE_INVALID
  40   };
  41
  42 #define FE_ALL_EXCEPT \
  43         (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
  44
  45 /* The AM33/2.0 FPU supports only Round to nearest.  Bits 3<<16 are
  46    reserved to represent other rounding modes.  */
  47 enum
  48   {
  49     FE_TONEAREST = 0x00000,
  50 #define FE_TONEAREST    FE_TONEAREST
  51   };
  52
  53
  54 /* Type representing exception flags.  */
  55 typedef unsigned int fexcept_t;
  56
  57
  58 /* Type representing floating-point environment.  */
  59 typedef unsigned int fenv_t;
  60
  61 /* If the default argument is used we use this value.  */
  62 #define FE_DFL_ENV      ((__const fenv_t *) -1)
  63
  64 #ifdef __USE_GNU
  65 /* Floating-point environment where none of the exception is masked.  */
  66 # define FE_NOMASK_ENV  ((__const fenv_t *) -2)
  67 #endif