derek.holloway
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59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
/* This is a software decimal floating point library.
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Copyright (C) 2007-2018 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <string.h>
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#include "dconfig.h"
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#include "bid-dpd.h"
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#include "decimal128.h"
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void __host_to_ieee_128 (_Decimal128 in, decimal128 *out);
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void __ieee_to_host_128 (decimal128 in, _Decimal128 *out);
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/* The code for converting 128-bit values between DPD and BID presumes
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that the 64-bit halves of the 128-bit value are in little-endian
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order, so they need swapping on big-endian hosts. */
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void
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__host_to_ieee_128 (_Decimal128 in, decimal128 *out)
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{
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#if WORDS_BIGENDIAN
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memcpy ((char *) out, (char *) &in + 8, 8);
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memcpy ((char *) out + 8, (char *) &in, 8);
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#else
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memcpy ((char *) out, (char *) &in, 16);
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#endif
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}
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void
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__ieee_to_host_128 (decimal128 in, _Decimal128 *out)
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{
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#if WORDS_BIGENDIAN
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memcpy ((char *) out, (char *) &in + 8, 8);
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memcpy ((char *) out + 8, (char *) &in, 8);
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#else
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memcpy ((char *) out, (char *) &in, 16);
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#endif
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}
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