Mercurial > hg > CbC > CbC_gcc
diff libdecnumber/bid/host-ieee128.c @ 0:a06113de4d67
first commit
author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
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date | Fri, 17 Jul 2009 14:47:48 +0900 |
parents | |
children | 04ced10e8804 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libdecnumber/bid/host-ieee128.c Fri Jul 17 14:47:48 2009 +0900 @@ -0,0 +1,58 @@ +/* This is a software decimal floating point library. + Copyright (C) 2007, 2009 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free +Software Foundation; either version 3, or (at your option) any later +version. + +GCC is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details. + +Under Section 7 of GPL version 3, you are granted additional +permissions described in the GCC Runtime Library Exception, version +3.1, as published by the Free Software Foundation. + +You should have received a copy of the GNU General Public License and +a copy of the GCC Runtime Library Exception along with this program; +see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +<http://www.gnu.org/licenses/>. */ + +#include <string.h> + +#include "dconfig.h" +#include "bid-dpd.h" +#include "decimal128.h" + +void __host_to_ieee_128 (_Decimal128 in, decimal128 *out); +void __ieee_to_host_128 (decimal128 in, _Decimal128 *out); + +/* The code for converting 128-bit values between DPD and BID presumes + that the 64-bit halves of the 128-bit value are in little-endian + order, so they need swapping on big-endian hosts. */ + +void +__host_to_ieee_128 (_Decimal128 in, decimal128 *out) +{ +#if WORDS_BIGENDIAN + memcpy ((char *) out, (char *) &in + 8, 8); + memcpy ((char *) out + 8, (char *) &in, 8); +#else + memcpy ((char *) out, (char *) &in, 16); +#endif +} + +void +__ieee_to_host_128 (decimal128 in, _Decimal128 *out) +{ +#if WORDS_BIGENDIAN + memcpy ((char *) out, (char *) &in + 8, 8); + memcpy ((char *) out + 8, (char *) &in, 8); +#else + memcpy ((char *) out, (char *) &in, 16); +#endif +}