sysdeps/ia64/bits/fenv.h

   1 /* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #ifndef _FENV_H
  20 # error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
  21 #endif
  22
  23
  24 /* Define bits representing the exception.  We use the bit positions of
  25    the appropriate bits in the FPSR...  (Tahoe EAS 2.4 5-4)*/
  26
  27 enum
  28   {
  29     FE_INEXACT =        1UL << 5,
  30 #define FE_INEXACT      FE_INEXACT
  31
  32     FE_UNDERFLOW =      1UL << 4,
  33 #define FE_UNDERFLOW    FE_UNDERFLOW
  34
  35     FE_OVERFLOW =       1UL << 3,
  36 #define FE_OVERFLOW     FE_OVERFLOW
  37
  38     FE_DIVBYZERO =      1UL << 2,
  39 #define FE_DIVBYZERO    FE_DIVBYZERO
  40
  41     FE_UNNORMAL =       1UL << 1,
  42 #define FE_UNNORMAL     FE_UNNORMAL
  43
  44     FE_INVALID =        1UL << 0,
  45 #define FE_INVALID      FE_INVALID
  46
  47     FE_ALL_EXCEPT =
  48         (FE_INEXACT | FE_UNDERFLOW | FE_OVERFLOW | FE_DIVBYZERO | FE_UNNORMAL | FE_INVALID)
  49 #define FE_ALL_EXCEPT   FE_ALL_EXCEPT
  50   };
  51
  52
  53 enum
  54   {
  55     FE_TOWARDZERO =     3,
  56 #define FE_TOWARDZERO   FE_TOWARDZERO
  57
  58     FE_UPWARD =         2,
  59 #define FE_UPWARD       FE_UPWARD
  60
  61     FE_DOWNWARD =       1,
  62 #define FE_DOWNWARD     FE_DOWNWARD
  63
  64     FE_TONEAREST =      0,
  65 #define FE_TONEAREST    FE_TONEAREST
  66   };
  67
  68
  69 /* Type representing exception flags.  */
  70 typedef unsigned long int fexcept_t;
  71
  72 /* Type representing floating-point environment.  */
  73 typedef unsigned long int fenv_t;
  74
  75 /* If the default argument is used we use this value.  */
  76 #define FE_DFL_ENV      ((__const fenv_t *) 0xc009804c0270033fUL)
  77
  78 #ifdef __USE_GNU
  79 /* Floating-point environment where only FE_UNNORMAL is masked since this
  80    exception is not generally supported by glibc.  */
  81 # define FE_NOMASK_ENV  ((__const fenv_t *) 0xc009804c02700302UL)
  82
  83 /* Floating-point environment with (processor-dependent) non-IEEE
  84    floating point.  In this case, turning on flush-to-zero mode for
  85    s0, s2, and s3.  */
  86 # define FE_NONIEEE_ENV ((__const fenv_t *) 0xc009a04d0270037fUL)
  87 #endif