Add BID decimal support

[pf3gnuchains/gcc-fork.git] / libdecnumber / bid / decimal128.c

diff --git a/libdecnumber/bid/decimal128.c b/libdecnumber/bid/decimal128.c
new file mode 100644 (file)
index 0000000..1daf5df
--- /dev/null
+++ b/libdecnumber/bid/decimal128.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 decimal128FromString __dpd128FromString
+#define decimal128ToString __dpd128ToString
+#define decimal128ToEngString __dpd128ToEngString
+#define decimal128FromNumber __dpd128FromNumber
+#define decimal128ToNumber __dpd128ToNumber
+
+#include "dpd/decimal128.c"
+
+#undef decimal128FromString
+#undef decimal128ToString
+#undef decimal128ToEngString
+#undef decimal128FromNumber
+#undef decimal128ToNumber
+
+#include "bid-dpd.h"
+
+#ifdef IN_LIBGCC2
+#define decimal128FromString __decimal128FromString
+#define decimal128ToString __decimal128ToString
+#define decimal128ToEngString __decimal128ToEngString
+#define decimal128FromNumber __decimal128FromNumber
+#define decimal128ToNumber __decimal128ToNumber
+#endif
+
+decimal128 *decimal128FromString (decimal128 *, const char *, decContext *);
+char *decimal128ToString (const decimal128 *, char *);
+char *decimal128ToEngString (const decimal128 *, char *);
+decimal128 *decimal128FromNumber (decimal128 *, const decNumber *, decContext *);
+decNumber *decimal128ToNumber (const decimal128 *, decNumber *);
+
+void __host_to_ieee_128 (_Decimal128 in, decimal128 *out);
+void __ieee_to_host_128 (decimal128 in, _Decimal128 *out);
+
+decimal128 *
+decimal128FromNumber (decimal128 *d128, const decNumber *dn,
+                     decContext *set)
+{
+  /* decimal128 and _Decimal128 are different types.  */
+  union
+    {
+      _Decimal128 _Dec;
+      decimal128 dec;
+    } u;
+
+  __dpd128FromNumber (d128, dn, set);
+
+  /* __dpd128FromNumber returns in big endian. But _dpd_to_bid128 takes
+     host endian. */
+  __ieee_to_host_128 (*d128, &u._Dec);
+
+  /* Convert DPD to BID.  */
+  _dpd_to_bid128 (&u._Dec, &u._Dec);
+
+  /* dfp.c is in bid endian. */
+  __host_to_ieee_128 (u._Dec, &u.dec);
+
+  /* d128 is returned as a pointer to _Decimal128 here.  */
+  *d128 = u.dec;
+
+  return d128;
+}
+
+decNumber *
+decimal128ToNumber (const decimal128 *bid128, decNumber *dn)
+{
+  /* decimal128 and _Decimal128 are different types.  */
+  union
+    {
+      _Decimal128 _Dec;
+      decimal128 dec;
+    } u;
+
+  /* bid128 is a pointer to _Decimal128 in bid endian. But _bid_to_dpd128
+     takes host endian.  */
+  __ieee_to_host_128 (*bid128, &u._Dec);
+
+  /* Convert BID to DPD.  */
+  _bid_to_dpd128 (&u._Dec, &u._Dec);
+
+  /* __dpd128ToNumber is in bid endian.  */
+  __host_to_ieee_128 (u._Dec, &u.dec);
+
+  return __dpd128ToNumber (&u.dec, dn);
+}
+
+char *
+decimal128ToString (const decimal128 *d128, char *string)
+{
+  decNumber dn;                        /* work */
+  decimal128ToNumber (d128, &dn);
+  decNumberToString (&dn, string);
+  return string;
+}
+
+char *
+decimal128ToEngString (const decimal128 *d128, char *string)
+{
+  decNumber dn;                        /* work */
+  decimal128ToNumber (d128, &dn);
+  decNumberToEngString (&dn, string);
+  return string;
+}
+
+decimal128 *
+decimal128FromString (decimal128 *result, const char *string,
+                     decContext *set)
+{
+  decContext dc;               /* work */
+  decNumber dn;                        /* .. */
+
+  decContextDefault (&dc, DEC_INIT_DECIMAL128);        /* no traps, please */
+  dc.round = set->round;       /* use supplied rounding */
+
+  decNumberFromString (&dn, string, &dc);      /* will round if needed */
+  decimal128FromNumber (result, &dn, &dc);
+  if (dc.status != 0)
+    {                          /* something happened */
+      decContextSetStatus (set, dc.status);    /* .. pass it on */
+    }
+  return result;
+}