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-rw-r--r--libdecnumber/bid/decimal128.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/libdecnumber/bid/decimal128.c b/libdecnumber/bid/decimal128.c
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+++ b/libdecnumber/bid/decimal128.c
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+/* 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/>. */
+
+#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;
+}