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1 /* This is a software decimal floating point library.
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2 Copyright (C) 2007, 2009 Free Software Foundation, Inc.
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 Under Section 7 of GPL version 3, you are granted additional
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17 permissions described in the GCC Runtime Library Exception, version
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18 3.1, as published by the Free Software Foundation.
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19
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20 You should have received a copy of the GNU General Public License and
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21 a copy of the GCC Runtime Library Exception along with this program;
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22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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23 <http://www.gnu.org/licenses/>. */
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24
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25 #include <string.h>
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26
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27 #include "dconfig.h"
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28 #include "bid-dpd.h"
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29 #include "decimal128.h"
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30
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31 void __host_to_ieee_128 (_Decimal128 in, decimal128 *out);
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32 void __ieee_to_host_128 (decimal128 in, _Decimal128 *out);
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33
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34 /* The code for converting 128-bit values between DPD and BID presumes
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35 that the 64-bit halves of the 128-bit value are in little-endian
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36 order, so they need swapping on big-endian hosts. */
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37
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38 void
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39 __host_to_ieee_128 (_Decimal128 in, decimal128 *out)
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40 {
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41 #if WORDS_BIGENDIAN
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42 memcpy ((char *) out, (char *) &in + 8, 8);
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43 memcpy ((char *) out + 8, (char *) &in, 8);
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44 #else
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45 memcpy ((char *) out, (char *) &in, 16);
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46 #endif
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47 }
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48
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49 void
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50 __ieee_to_host_128 (decimal128 in, _Decimal128 *out)
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51 {
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52 #if WORDS_BIGENDIAN
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53 memcpy ((char *) out, (char *) &in + 8, 8);
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54 memcpy ((char *) out + 8, (char *) &in, 8);
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55 #else
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56 memcpy ((char *) out, (char *) &in, 16);
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57 #endif
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58 }
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