Add BID decimal support

Co-Authored-By: H.J. Lu <hongjiu.lu@intel.com>
Co-Authored-By: Marius Cornea <marius.cornea@intel.com>

From-SVN: r123185

1 files changed, 148 insertions, 0 deletions

diff --git a/libdecnumber/bid/decimal64.c b/libdecnumber/bid/decimal64.c
new file mode 100644
index 00000000000..bdbee38ce62
--- /dev/null
+++ b/libdecnumber/bid/decimal64.c
@@ -0,0 +1,148 @@
+/* Copyright (C) 2007
+   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
+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.
+
+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.  */
+
+/* As a special exception, if you link this library with other files,
+   some of which are compiled with GCC, to produce an executable,
+   this library does not by itself cause the resulting executable
+   to be covered by the GNU General Public License.
+   This exception does not however invalidate any other reasons why
+   the executable file might be covered by the GNU General Public License.  */
+
+#define decimal64FromString __dpd64FromString
+#define decimal64ToString __dpd64ToString
+#define decimal64ToEngString __dpd64ToEngString
+#define decimal64FromNumber __dpd64FromNumber
+#define decimal64ToNumber __dpd64ToNumber
+
+#include "dpd/decimal64.c"
+
+#undef decimal64FromString
+#undef decimal64ToString
+#undef decimal64ToEngString
+#undef decimal64FromNumber
+#undef decimal64ToNumber
+
+#include "bid-dpd.h"
+
+#ifdef IN_LIBGCC2
+#define decimal64FromString __decimal64FromString
+#define decimal64ToString __decimal64ToString
+#define decimal64ToEngString __decimal64ToEngString
+#define decimal64FromNumber __decimal64FromNumber
+#define decimal64ToNumber __decimal64ToNumber
+#endif
+
+decimal64 *decimal64FromString (decimal64 *, const char *, decContext *);
+char *decimal64ToString (const decimal64 *, char *);
+char *decimal64ToEngString (const decimal64 *, char *);
+decimal64 *decimal64FromNumber (decimal64 *, const decNumber *, decContext *);
+decNumber *decimal64ToNumber (const decimal64 *, decNumber *);
+
+void __host_to_ieee_64 (_Decimal64 in, decimal64 *out);
+void __ieee_to_host_64 (decimal64 in, _Decimal64 *out);
+
+decimal64 *
+decimal64FromNumber (decimal64 *d64, const decNumber *dn,
+		      decContext *set)
+{
+  /* decimal64 and _Decimal64 are different types.  */
+  union
+    {
+      _Decimal64 _Dec;
+      decimal64 dec;
+    } u;
+
+  __dpd64FromNumber (d64, dn, set);
+
+  /* __dpd64FromNumber returns in big endian. But _dpd_to_bid64 takes
+     host endian. */
+  __ieee_to_host_64 (*d64, &u._Dec);
+
+  /* Convert DPD to BID.  */
+  _dpd_to_bid64 (&u._Dec, &u._Dec);
+
+  /* dfp.c is in bid endian. */
+  __host_to_ieee_64 (u._Dec, &u.dec);
+
+  /* d64 is returned as a pointer to _Decimal64 here.  */
+  *d64 = u.dec;
+
+  return d64;
+}
+
+decNumber *
+decimal64ToNumber (const decimal64 *bid64, decNumber *dn)
+{
+  /* decimal64 and _Decimal64 are different types.  */
+  union
+    {
+      _Decimal64 _Dec;
+      decimal64 dec;
+    } u;
+
+  /* bid64 is a pointer to _Decimal64 in bid endian. But _bid_to_dpd64
+     takes host endian.  */
+  __ieee_to_host_64 (*bid64, &u._Dec);
+
+  /* Convert BID to DPD.  */
+  _bid_to_dpd64 (&u._Dec, &u._Dec);
+
+  /* __dpd64ToNumber is in bid endian.  */
+  __host_to_ieee_64 (u._Dec, &u.dec);
+
+  return __dpd64ToNumber (&u.dec, dn);
+}
+
+char *
+decimal64ToString (const decimal64 *d64, char *string)
+{
+  decNumber dn;			/* work */
+  decimal64ToNumber (d64, &dn);
+  decNumberToString (&dn, string);
+  return string;
+}
+
+char *
+decimal64ToEngString (const decimal64 *d64, char *string)
+{
+  decNumber dn;			/* work */
+  decimal64ToNumber (d64, &dn);
+  decNumberToEngString (&dn, string);
+  return string;
+}
+
+decimal64 *
+decimal64FromString (decimal64 *result, const char *string,
+		      decContext *set)
+{
+  decContext dc;		/* work */
+  decNumber dn;			/* .. */
+
+  decContextDefault (&dc, DEC_INIT_DECIMAL64);	/* no traps, please */
+  dc.round = set->round;	/* use supplied rounding */
+
+  decNumberFromString (&dn, string, &dc);	/* will round if needed */
+  decimal64FromNumber (result, &dn, &dc);
+  if (dc.status != 0)
+    {				/* something happened */
+      decContextSetStatus (set, dc.status);	/* .. pass it on */
+    }
+  return result;
+}