libdecnumber/bid/host-ieee64.c

   1 /* This is a software decimal floating point library.
   2    Copyright (C) 2007-2017 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 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 Under Section 7 of GPL version 3, you are granted additional
  17 permissions described in the GCC Runtime Library Exception, version
  18 3.1, as published by the Free Software Foundation.
  19
  20 You should have received a copy of the GNU General Public License and
  21 a copy of the GCC Runtime Library Exception along with this program;
  22 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25 /* This implements IEEE 754R decimal floating point arithmetic, but
  26    does not provide a mechanism for setting the rounding mode, or for
  27    generating or handling exceptions.  Conversions between decimal
  28    floating point types and other types depend on C library functions.
  29
  30    Contributed by Ben Elliston  <bje@au.ibm.com>.  */
  31
  32 /* The intended way to use this file is to make two copies, add `#define '
  33    to one copy, then compile both copies and add them to libgcc.a.  */
  34
  35 #include <string.h>
  36 #include "bid-dpd.h"
  37 #include "decimal64.h"
  38
  39 void __host_to_ieee_64 (_Decimal64 in, decimal64 *out);
  40 void __ieee_to_host_64 (decimal64 in, _Decimal64 *out);
  41
  42 void
  43 __host_to_ieee_64 (_Decimal64 in, decimal64 *out)
  44 {
  45   memcpy ((char *) out, (char *) &in, 8);
  46 }
  47
  48 void
  49 __ieee_to_host_64 (decimal64 in, _Decimal64 *out)
  50 {
  51   memcpy ((char *) out, (char *) &in, 8);
  52 }