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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libdecnumber/bid/host-ieee128.c
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Diffstat (limited to 'libdecnumber/bid/host-ieee128.c')
-rw-r--r--libdecnumber/bid/host-ieee128.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/libdecnumber/bid/host-ieee128.c b/libdecnumber/bid/host-ieee128.c
new file mode 100644
index 000000000..9e2d005cd
--- /dev/null
+++ b/libdecnumber/bid/host-ieee128.c
@@ -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
+}