/* This is a software decimal floating point library.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007-2022 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 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file. (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
-
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.
-You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+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 <stdio.h>
-#include <stdlib.h>
#include <string.h>
-#include <limits.h>
-#include "config.h"
-#include "gstdint.h"
+#include "dconfig.h"
#include "bid-dpd.h"
#include "decimal128.h"
-extern uint32_t __dec_byte_swap (uint32_t);
void __host_to_ieee_128 (_Decimal128 in, decimal128 *out);
void __ieee_to_host_128 (decimal128 in, _Decimal128 *out);
-#ifndef WORDS_BIGENDIAN
-#define WORDS_BIGENDIAN 0
-#endif
-
-static void
-__swap128 (char *src, char *dst)
-{
- uint32_t t1, t2, t3, t4;
-
- if (!WORDS_BIGENDIAN)
- {
- memcpy (&t1, src, 4);
- memcpy (&t2, src + 4, 4);
- memcpy (&t3, src + 8, 4);
- memcpy (&t4, src + 12, 4);
- t1 = __dec_byte_swap (t1);
- t2 = __dec_byte_swap (t2);
- t3 = __dec_byte_swap (t3);
- t4 = __dec_byte_swap (t4);
- memcpy (dst, &t4, 4);
- memcpy (dst + 4, &t3, 4);
- memcpy (dst + 8, &t2, 4);
- memcpy (dst + 12, &t1, 4);
- }
- else
- memcpy (dst, src, 16);
-}
+/* 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)
{
- __swap128 ((char *) &in, (char *) 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)
{
- __swap128 ((char *) &in, (char *) 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
}