| 1 | /* This is a software decimal floating point library. |
| 2 | Copyright (C) 2007-2018 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 | #include <string.h> |
| 26 | |
| 27 | #include "dconfig.h" |
| 28 | #include "bid-dpd.h" |
| 29 | #include "decimal128.h" |
| 30 | |
| 31 | void __host_to_ieee_128 (_Decimal128 in, decimal128 *out); |
| 32 | void __ieee_to_host_128 (decimal128 in, _Decimal128 *out); |
| 33 | |
| 34 | /* The code for converting 128-bit values between DPD and BID presumes |
| 35 | that the 64-bit halves of the 128-bit value are in little-endian |
| 36 | order, so they need swapping on big-endian hosts. */ |
| 37 | |
| 38 | void |
| 39 | __host_to_ieee_128 (_Decimal128 in, decimal128 *out) |
| 40 | { |
| 41 | #if WORDS_BIGENDIAN |
| 42 | memcpy ((char *) out, (char *) &in + 8, 8); |
| 43 | memcpy ((char *) out + 8, (char *) &in, 8); |
| 44 | #else |
| 45 | memcpy ((char *) out, (char *) &in, 16); |
| 46 | #endif |
| 47 | } |
| 48 | |
| 49 | void |
| 50 | __ieee_to_host_128 (decimal128 in, _Decimal128 *out) |
| 51 | { |
| 52 | #if WORDS_BIGENDIAN |
| 53 | memcpy ((char *) out, (char *) &in + 8, 8); |
| 54 | memcpy ((char *) out + 8, (char *) &in, 8); |
| 55 | #else |
| 56 | memcpy ((char *) out, (char *) &in, 16); |
| 57 | #endif |
| 58 | } |