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/decimal32.c b/libdecnumber/bid/decimal32.c
new file mode 100644
index 0000000..68e004e
--- /dev/null
+++ b/libdecnumber/bid/decimal32.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 decimal32FromString __dpd32FromString
+#define decimal32ToString __dpd32ToString
+#define decimal32ToEngString __dpd32ToEngString
+#define decimal32FromNumber __dpd32FromNumber
+#define decimal32ToNumber __dpd32ToNumber
+
+#include "dpd/decimal32.c"
+
+#undef decimal32FromString
+#undef decimal32ToString
+#undef decimal32ToEngString
+#undef decimal32FromNumber
+#undef decimal32ToNumber
+
+#include "bid-dpd.h"
+
+#ifdef IN_LIBGCC2
+#define decimal32FromString __decimal32FromString
+#define decimal32ToString __decimal32ToString
+#define decimal32ToEngString __decimal32ToEngString
+#define decimal32FromNumber __decimal32FromNumber
+#define decimal32ToNumber __decimal32ToNumber
+#endif
+
+decimal32 *decimal32FromString (decimal32 *, const char *, decContext *);
+char *decimal32ToString (const decimal32 *, char *);
+char *decimal32ToEngString (const decimal32 *, char *);
+decimal32 *decimal32FromNumber (decimal32 *, const decNumber *, decContext *);
+decNumber *decimal32ToNumber (const decimal32 *, decNumber *);
+
+void __host_to_ieee_32 (_Decimal32 in, decimal32 *out);
+void __ieee_to_host_32 (decimal32 in, _Decimal32 *out);
+
+decimal32 *
+decimal32FromNumber (decimal32 *d32, const decNumber *dn,
+		      decContext *set)
+{
+  /* decimal32 and _Decimal32 are different types.  */
+  union
+    {
+      _Decimal32 _Dec;
+      decimal32 dec;
+    } u;
+
+  __dpd32FromNumber (d32, dn, set);
+
+  /* __dpd32FromNumber returns in big endian. But _dpd_to_bid32 takes
+     host endian. */
+  __ieee_to_host_32 (*d32, &u._Dec);
+
+  /* Convert DPD to BID.  */
+  _dpd_to_bid32 (&u._Dec, &u._Dec);
+
+  /* dfp.c is in bid endian. */
+  __host_to_ieee_32 (u._Dec, &u.dec);
+
+  /* d32 is returned as a pointer to _Decimal32 here.  */
+  *d32 = u.dec;
+
+  return d32;
+}
+
+decNumber *
+decimal32ToNumber (const decimal32 *bid32, decNumber *dn)
+{
+  /* decimal32 and _Decimal32 are different types.  */
+  union
+    {
+      _Decimal32 _Dec;
+      decimal32 dec;
+    } u;
+
+  /* bid32 is a pointer to _Decimal32 in bid endian. But _bid_to_dpd32
+     takes host endian.  */
+  __ieee_to_host_32 (*bid32, &u._Dec);
+
+  /* Convert BID to DPD.  */
+  _bid_to_dpd32 (&u._Dec, &u._Dec);
+
+  /* __dpd32ToNumber is in bid endian.  */
+  __host_to_ieee_32 (u._Dec, &u.dec);
+
+  return __dpd32ToNumber (&u.dec, dn);
+}
+
+char *
+decimal32ToString (const decimal32 *d32, char *string)
+{
+  decNumber dn;			/* work */
+  decimal32ToNumber (d32, &dn);
+  decNumberToString (&dn, string);
+  return string;
+}
+
+char *
+decimal32ToEngString (const decimal32 *d32, char *string)
+{
+  decNumber dn;			/* work */
+  decimal32ToNumber (d32, &dn);
+  decNumberToEngString (&dn, string);
+  return string;
+}
+
+decimal32 *
+decimal32FromString (decimal32 *result, const char *string,
+		      decContext *set)
+{
+  decContext dc;		/* work */
+  decNumber dn;			/* .. */
+
+  decContextDefault (&dc, DEC_INIT_DECIMAL32);	/* no traps, please */
+  dc.round = set->round;	/* use supplied rounding */
+
+  decNumberFromString (&dn, string, &dc);	/* will round if needed */
+  decimal32FromNumber (result, &dn, &dc);
+  if (dc.status != 0)
+    {				/* something happened */
+      decContextSetStatus (set, dc.status);	/* .. pass it on */
+    }
+  return result;
+}