Imported gcc-4.4.3

[msp430-gcc.git] / libdecnumber / bid / host-ieee128.c

diff --git a/libdecnumber/bid/host-ieee128.c b/libdecnumber/bid/host-ieee128.c
new file mode 100644 (file)
index 0000000..9e2d005
--- /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
+}