1/* Copyright (C) 2007-2024 Free Software Foundation, Inc.
2
3This file is part of GCC.
4
5GCC is free software; you can redistribute it and/or modify it under
6the terms of the GNU General Public License as published by the Free
7Software Foundation; either version 3, or (at your option) any later
8version.
9
10GCC is distributed in the hope that it will be useful, but WITHOUT ANY
11WARRANTY; without even the implied warranty of MERCHANTABILITY or
12FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13for more details.
14
15Under Section 7 of GPL version 3, you are granted additional
16permissions described in the GCC Runtime Library Exception, version
173.1, as published by the Free Software Foundation.
18
19You should have received a copy of the GNU General Public License and
20a copy of the GCC Runtime Library Exception along with this program;
21see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
22<http://www.gnu.org/licenses/>. */
23
24#define decimal128FromString __dpd128FromString
25#define decimal128ToString __dpd128ToString
26#define decimal128ToEngString __dpd128ToEngString
27#define decimal128FromNumber __dpd128FromNumber
28#define decimal128ToNumber __dpd128ToNumber
29
30#include "dpd/decimal128.c"
31
32#undef decimal128FromString
33#undef decimal128ToString
34#undef decimal128ToEngString
35#undef decimal128FromNumber
36#undef decimal128ToNumber
37
38#include "bid-dpd.h"
39
40#ifdef IN_LIBGCC2
41#define decimal128FromString __decimal128FromString
42#define decimal128ToString __decimal128ToString
43#define decimal128ToEngString __decimal128ToEngString
44#define decimal128FromNumber __decimal128FromNumber
45#define decimal128ToNumber __decimal128ToNumber
46#endif
47
48decimal128 *decimal128FromString (decimal128 *, const char *, decContext *);
49char *decimal128ToString (const decimal128 *, char *);
50char *decimal128ToEngString (const decimal128 *, char *);
51decimal128 *decimal128FromNumber (decimal128 *, const decNumber *, decContext *);
52decNumber *decimal128ToNumber (const decimal128 *, decNumber *);
53
54void __host_to_ieee_128 (_Decimal128 in, decimal128 *out);
55void __ieee_to_host_128 (decimal128 in, _Decimal128 *out);
56
57decimal128 *
58decimal128FromNumber (decimal128 *d128, const decNumber *dn,
59 decContext *set)
60{
61 /* decimal128 and _Decimal128 are different types. */
62 union
63 {
64 _Decimal128 _Dec;
65 decimal128 dec;
66 } u;
67
68 __dpd128FromNumber (d128, dn, set);
69
70 /* __dpd128FromNumber returns in big endian. But _dpd_to_bid128 takes
71 host endian. */
72 __ieee_to_host_128 (in: *d128, out: &u._Dec);
73
74 /* Convert DPD to BID. */
75 _dpd_to_bid128 (&u._Dec, &u._Dec);
76
77 /* dfp.c is in bid endian. */
78 __host_to_ieee_128 (in: u._Dec, out: &u.dec);
79
80 /* d128 is returned as a pointer to _Decimal128 here. */
81 *d128 = u.dec;
82
83 return d128;
84}
85
86decNumber *
87decimal128ToNumber (const decimal128 *bid128, decNumber *dn)
88{
89 /* decimal128 and _Decimal128 are different types. */
90 union
91 {
92 _Decimal128 _Dec;
93 decimal128 dec;
94 } u;
95
96 /* bid128 is a pointer to _Decimal128 in bid endian. But _bid_to_dpd128
97 takes host endian. */
98 __ieee_to_host_128 (in: *bid128, out: &u._Dec);
99
100 /* Convert BID to DPD. */
101 _bid_to_dpd128 (&u._Dec, &u._Dec);
102
103 /* __dpd128ToNumber is in bid endian. */
104 __host_to_ieee_128 (in: u._Dec, out: &u.dec);
105
106 return __dpd128ToNumber (d128: &u.dec, dn);
107}
108
109char *
110decimal128ToString (const decimal128 *d128, char *string)
111{
112 decNumber dn; /* work */
113 decimal128ToNumber (bid128: d128, dn: &dn);
114 decNumberToString (&dn, string);
115 return string;
116}
117
118char *
119decimal128ToEngString (const decimal128 *d128, char *string)
120{
121 decNumber dn; /* work */
122 decimal128ToNumber (bid128: d128, dn: &dn);
123 decNumberToEngString (&dn, string);
124 return string;
125}
126
127decimal128 *
128decimal128FromString (decimal128 *result, const char *string,
129 decContext *set)
130{
131 decContext dc; /* work */
132 decNumber dn; /* .. */
133
134 decContextDefault (&dc, DEC_INIT_DECIMAL128); /* no traps, please */
135 dc.round = set->round; /* use supplied rounding */
136
137 decNumberFromString (&dn, string, &dc); /* will round if needed */
138 decimal128FromNumber (d128: result, dn: &dn, set: &dc);
139 if (dc.status != 0)
140 { /* something happened */
141 decContextSetStatus (set, dc.status); /* .. pass it on */
142 }
143 return result;
144}
145

source code of libdecnumber/bid/decimal128.c