ports/sysdeps/ia64/bits/fenv.h

   1 /* Copyright (C) 1999-2014 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, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _FENV_H
  19 # error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
  20 #endif
  21
  22
  23 /* Define bits representing the exception.  We use the bit positions of
  24    the appropriate bits in the FPSR...  (Tahoe EAS 2.4 5-4)*/
  25
  26 enum
  27   {
  28     FE_INEXACT =
  29 #define FE_INEXACT      (1 << 5)
  30       FE_INEXACT,
  31
  32     FE_UNDERFLOW =
  33 #define FE_UNDERFLOW    (1 << 4)
  34       FE_UNDERFLOW,
  35
  36     FE_OVERFLOW =
  37 #define FE_OVERFLOW     (1 << 3)
  38       FE_OVERFLOW,
  39
  40     FE_DIVBYZERO =
  41 #define FE_DIVBYZERO    (1 << 2)
  42       FE_DIVBYZERO,
  43
  44     FE_UNNORMAL =
  45 #define FE_UNNORMAL     (1 << 1)
  46       FE_UNNORMAL,
  47
  48     FE_INVALID =
  49 #define FE_INVALID      (1 << 0)
  50       FE_INVALID,
  51
  52     FE_ALL_EXCEPT =
  53 #define FE_ALL_EXCEPT   (FE_INEXACT | FE_UNDERFLOW | FE_OVERFLOW | FE_DIVBYZERO | FE_UNNORMAL | FE_INVALID)
  54       FE_ALL_EXCEPT
  55   };
  56
  57
  58 enum
  59   {
  60     FE_TOWARDZERO =
  61 #define FE_TOWARDZERO   3
  62       FE_TOWARDZERO,
  63
  64     FE_UPWARD =
  65 #define FE_UPWARD       2
  66       FE_UPWARD,
  67
  68     FE_DOWNWARD =
  69 #define FE_DOWNWARD     1
  70       FE_DOWNWARD,
  71
  72     FE_TONEAREST =
  73 #define FE_TONEAREST    0
  74       FE_TONEAREST,
  75   };
  76
  77
  78 /* Type representing exception flags.  */
  79 typedef unsigned long int fexcept_t;
  80
  81 /* Type representing floating-point environment.  */
  82 typedef unsigned long int fenv_t;
  83
  84 /* If the default argument is used we use this value.  */
  85 #define FE_DFL_ENV      ((const fenv_t *) 0xc009804c0270033fUL)
  86
  87 #ifdef __USE_GNU
  88 /* Floating-point environment where only FE_UNNORMAL is masked since this
  89    exception is not generally supported by glibc.  */
  90 # define FE_NOMASK_ENV  ((const fenv_t *) 0xc009804c02700302UL)
  91
  92 /* Floating-point environment with (processor-dependent) non-IEEE
  93    floating point.  In this case, turning on flush-to-zero mode for
  94    s0, s2, and s3.  */
  95 # define FE_NONIEEE_ENV ((const fenv_t *) 0xc009a04d0270037fUL)
  96 #endif