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f5bc1778 DJ |
1 | /* This is a software decimal floating point 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, the | |
12 | Free Software Foundation gives you unlimited permission to link the | |
13 | compiled version of this file into combinations with other programs, | |
14 | and to distribute those combinations without any restriction coming | |
15 | from the use of this file. (The General Public License restrictions | |
16 | do apply in other respects; for example, they cover modification of | |
17 | the file, and distribution when not linked into a combine | |
18 | 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 | #include <string.h> | |
31 | ||
5f5dfcbe | 32 | #include "dconfig.h" |
f5bc1778 DJ |
33 | #include "bid-dpd.h" |
34 | #include "decimal128.h" | |
35 | ||
36 | void __host_to_ieee_128 (_Decimal128 in, decimal128 *out); | |
37 | void __ieee_to_host_128 (decimal128 in, _Decimal128 *out); | |
38 | ||
5f5dfcbe DD |
39 | /* The code for converting 128-bit values between DPD and BID presumes |
40 | that the 64-bit halves of the 128-bit value are in little-endian | |
41 | order, so they need swapping on big-endian hosts. */ | |
42 | ||
f5bc1778 DJ |
43 | void |
44 | __host_to_ieee_128 (_Decimal128 in, decimal128 *out) | |
45 | { | |
5f5dfcbe DD |
46 | #if WORDS_BIGENDIAN |
47 | memcpy ((char *) out, (char *) &in + 8, 8); | |
48 | memcpy ((char *) out + 8, (char *) &in, 8); | |
49 | #else | |
f5bc1778 | 50 | memcpy ((char *) out, (char *) &in, 16); |
5f5dfcbe | 51 | #endif |
f5bc1778 DJ |
52 | } |
53 | ||
54 | void | |
55 | __ieee_to_host_128 (decimal128 in, _Decimal128 *out) | |
56 | { | |
5f5dfcbe DD |
57 | #if WORDS_BIGENDIAN |
58 | memcpy ((char *) out, (char *) &in + 8, 8); | |
59 | memcpy ((char *) out + 8, (char *) &in, 8); | |
60 | #else | |
f5bc1778 | 61 | memcpy ((char *) out, (char *) &in, 16); |
5f5dfcbe | 62 | #endif |
f5bc1778 | 63 | } |