libdecnumber/dpd/decimal128Local.h

   1 /* Local definitions for use with the decNumber C Library.
   2    Copyright (C) 2007 Free Software Foundation, Inc.
   3
   4    This file is part of GCC.
   5
   6    GCC is free software; you can redistribute it and/or modify it under
   7    the terms of the GNU General Public License as published by the Free
   8    Software Foundation; either version 2, or (at your option) any later
   9    version.
  10
  11    In addition to the permissions in the GNU General Public License,
  12    the Free Software Foundation gives you unlimited permission to link
  13    the compiled version of this file into combinations with other
  14    programs, and to distribute those combinations without any
  15    restriction coming from the use of this file.  (The General Public
  16    License restrictions do apply in other respects; for example, they
  17    cover modification of the file, and distribution when not linked
  18    into a combine executable.)
  19
  20    GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  21    WARRANTY; without even the implied warranty of MERCHANTABILITY or
  22    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  23    for more details.
  24
  25    You should have received a copy of the GNU General Public License
  26    along with GCC; see the file COPYING.  If not, write to the Free
  27    Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  28    02110-1301, USA.  */
  29
  30 #if !defined(DECIMAL128LOCAL)
  31
  32 /* The compiler needs sign manipulation functions for decimal128 which
  33    are not part of the decNumber package.  */
  34
  35 /* Set sign; this assumes the sign was previously zero.  */
  36 #define decimal128SetSign(d,b) \
  37   { (d)->bytes[FLOAT_WORDS_BIG_ENDIAN ? 0 : 15] |= ((unsigned) (b) << 7); }
  38
  39 /* Clear sign.  */
  40 #define decimal128ClearSign(d) \
  41   { (d)->bytes[FLOAT_WORDS_BIG_ENDIAN ? 0 : 15] &= ~0x80; }
  42
  43 /* Flip sign.  */
  44 #define decimal128FlipSign(d) \
  45   { (d)->bytes[FLOAT_WORDS_BIG_ENDIAN ? 0 : 15] ^= 0x80; }
  46
  47 #endif