1/* Copyright (C) 2007, 2009
2   Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 3, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14for more details.
15
16Under Section 7 of GPL version 3, you are granted additional
17permissions described in the GCC Runtime Library Exception, version
183.1, as published by the Free Software Foundation.
19
20You should have received a copy of the GNU General Public License and
21a copy of the GCC Runtime Library Exception along with this program;
22see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
23<http://www.gnu.org/licenses/>.  */
24
25#define decimal128FromString __dpd128FromString
26#define decimal128ToString __dpd128ToString
27#define decimal128ToEngString __dpd128ToEngString
28#define decimal128FromNumber __dpd128FromNumber
29#define decimal128ToNumber __dpd128ToNumber
30
31#include "dpd/decimal128.c"
32
33#undef decimal128FromString
34#undef decimal128ToString
35#undef decimal128ToEngString
36#undef decimal128FromNumber
37#undef decimal128ToNumber
38
39#include "bid-dpd.h"
40
41#ifdef IN_LIBGCC2
42#define decimal128FromString __decimal128FromString
43#define decimal128ToString __decimal128ToString
44#define decimal128ToEngString __decimal128ToEngString
45#define decimal128FromNumber __decimal128FromNumber
46#define decimal128ToNumber __decimal128ToNumber
47#endif
48
49decimal128 *decimal128FromString (decimal128 *, const char *, decContext *);
50char *decimal128ToString (const decimal128 *, char *);
51char *decimal128ToEngString (const decimal128 *, char *);
52decimal128 *decimal128FromNumber (decimal128 *, const decNumber *, decContext *);
53decNumber *decimal128ToNumber (const decimal128 *, decNumber *);
54
55void __host_to_ieee_128 (_Decimal128 in, decimal128 *out);
56void __ieee_to_host_128 (decimal128 in, _Decimal128 *out);
57
58decimal128 *
59decimal128FromNumber (decimal128 *d128, const decNumber *dn,
60		      decContext *set)
61{
62  /* decimal128 and _Decimal128 are different types.  */
63  union
64    {
65      _Decimal128 _Dec;
66      decimal128 dec;
67    } u;
68
69  __dpd128FromNumber (d128, dn, set);
70
71  /* __dpd128FromNumber returns in big endian. But _dpd_to_bid128 takes
72     host endian. */
73  __ieee_to_host_128 (*d128, &u._Dec);
74
75  /* Convert DPD to BID.  */
76  _dpd_to_bid128 (&u._Dec, &u._Dec);
77
78  /* dfp.c is in bid endian. */
79  __host_to_ieee_128 (u._Dec, &u.dec);
80
81  /* d128 is returned as a pointer to _Decimal128 here.  */
82  *d128 = u.dec;
83
84  return d128;
85}
86
87decNumber *
88decimal128ToNumber (const decimal128 *bid128, decNumber *dn)
89{
90  /* decimal128 and _Decimal128 are different types.  */
91  union
92    {
93      _Decimal128 _Dec;
94      decimal128 dec;
95    } u;
96
97  /* bid128 is a pointer to _Decimal128 in bid endian. But _bid_to_dpd128
98     takes host endian.  */
99  __ieee_to_host_128 (*bid128, &u._Dec);
100
101  /* Convert BID to DPD.  */
102  _bid_to_dpd128 (&u._Dec, &u._Dec);
103
104  /* __dpd128ToNumber is in bid endian.  */
105  __host_to_ieee_128 (u._Dec, &u.dec);
106
107  return __dpd128ToNumber (&u.dec, dn);
108}
109
110char *
111decimal128ToString (const decimal128 *d128, char *string)
112{
113  decNumber dn;			/* work */
114  decimal128ToNumber (d128, &dn);
115  decNumberToString (&dn, string);
116  return string;
117}
118
119char *
120decimal128ToEngString (const decimal128 *d128, char *string)
121{
122  decNumber dn;			/* work */
123  decimal128ToNumber (d128, &dn);
124  decNumberToEngString (&dn, string);
125  return string;
126}
127
128decimal128 *
129decimal128FromString (decimal128 *result, const char *string,
130		      decContext *set)
131{
132  decContext dc;		/* work */
133  decNumber dn;			/* .. */
134
135  decContextDefault (&dc, DEC_INIT_DECIMAL128);	/* no traps, please */
136  dc.round = set->round;	/* use supplied rounding */
137
138  decNumberFromString (&dn, string, &dc);	/* will round if needed */
139  decimal128FromNumber (result, &dn, &dc);
140  if (dc.status != 0)
141    {				/* something happened */
142      decContextSetStatus (set, dc.status);	/* .. pass it on */
143    }
144  return result;
145}
146