1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
|
/* Copyright (C) 2007-2014 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/>. */
/*****************************************************************************
* Non-computational Operations on Flags:
****************************************************************************/
#include "bid_internal.h"
// Note the following definitions from bid_conf.h: if the status flags are
// global, they have a fixed name recognized by the library functions:
// _IDEC_glbflags; pfpsf, defined as &_IDEC_glbflags, can be used instead; no
// argument is passed for the status flags to the library functions; if the
// status flags are local then they are passed as an arument, always by
// reference, to the library functions
//
// #if !DECIMAL_GLOBAL_EXCEPTION_FLAGS
// #define _EXC_FLAGS_PARAM , _IDEC_flags *pfpsf
// #else
// extern _IDEC_flags _IDEC_glbflags;
// #define _EXC_FLAGS_PARAM
// #define pfpsf &_IDEC_glbflags
// #endif
#if DECIMAL_CALL_BY_REFERENCE
void
signalException (_IDEC_flags * pflagsmask _EXC_FLAGS_PARAM) {
// *pflagsmask is the logical OR of the flags to be set, e.g.
// *pflagsmask =INVALID_EXCEPTION | ZERO_DIVIDE_EXCEPTION | OVERFLOW_EXCEPTION
// UNDERFLOW_EXCEPTION | INEXACT_EXCEPTION to set all five IEEE 754R
// exception flags
*pfpsf = *pfpsf | (*pflagsmask & BID_IEEE_FLAGS);
}
#else
void
signalException (_IDEC_flags flagsmask _EXC_FLAGS_PARAM) {
// flagsmask is the logical OR of the flags to be set, e.g.
// flagsmask = INVALID_EXCEPTION | ZERO_DIVIDE_EXCEPTION | OVERFLOW_EXCEPTION
// UNDERFLOW_EXCEPTION | INEXACT_EXCEPTION to set all five IEEE 754R
// exception flags
*pfpsf = *pfpsf | (flagsmask & BID_IEEE_FLAGS);
}
#endif
#if DECIMAL_CALL_BY_REFERENCE
void
lowerFlags (_IDEC_flags * pflagsmask _EXC_FLAGS_PARAM) {
// *pflagsmask is the logical OR of the flags to be cleared, e.g.
// *pflagsmask =INVALID_EXCEPTION | ZERO_DIVIDE_EXCEPTION | OVERFLOW_EXCEPTION
// UNDERFLOW_EXCEPTION | INEXACT_EXCEPTION to clear all five IEEE 754R
// exception flags
*pfpsf = *pfpsf & ~(*pflagsmask & BID_IEEE_FLAGS);
}
#else
void
lowerFlags (_IDEC_flags flagsmask _EXC_FLAGS_PARAM) {
// flagsmask is the logical OR of the flags to be cleared, e.g.
// flagsmask = INVALID_EXCEPTION | ZERO_DIVIDE_EXCEPTION | OVERFLOW_EXCEPTION
// UNDERFLOW_EXCEPTION | INEXACT_EXCEPTION to clear all five IEEE 754R
// exception flags
*pfpsf = *pfpsf & ~(flagsmask & BID_IEEE_FLAGS);
}
#endif
#if DECIMAL_CALL_BY_REFERENCE
void
testFlags (_IDEC_flags * praised,
_IDEC_flags * pflagsmask _EXC_FLAGS_PARAM) {
// *praised is a pointer to the result, i.e. the logical OR of the flags
// selected by *pflagsmask that are set; e.g. if
// *pflagsmask = INVALID_EXCEPTION | UNDERFLOW_EXCEPTION | INEXACT_EXCEPTION
// and only the invalid and inexact flags are raised (set) then upon return
// *praised = INVALID_EXCEPTION | INEXACT_EXCEPTION
*praised = *pfpsf & (*pflagsmask & BID_IEEE_FLAGS);
}
#else
_IDEC_flags
testFlags (_IDEC_flags flagsmask _EXC_FLAGS_PARAM) {
_IDEC_flags raised;
// the raturn value raised is the logical OR of the flags
// selected by flagsmask, that are set; e.g. if
// flagsmask = INVALID_EXCEPTION | UNDERFLOW_EXCEPTION | INEXACT_EXCEPTION and
// only the invalid and inexact flags are raised (set) then the return value
// is raised = INVALID_EXCEPTION | INEXACT_EXCEPTION
raised = *pfpsf & (flagsmask & BID_IEEE_FLAGS);
return (raised);
}
#endif
#if DECIMAL_CALL_BY_REFERENCE
void
testSavedFlags (_IDEC_flags * praised, _IDEC_flags * psavedflags,
_IDEC_flags * pflagsmask) {
// *praised is a pointer to the result, i.e. the logical OR of the flags
// selected by *pflagsmask that are set in *psavedflags; e.g. if
// *pflagsmask = INVALID_EXCEPTION | UNDERFLOW_EXCEPTION | INEXACT_EXCEPTION
// and only the invalid and inexact flags are raised (set) in *psavedflags
// then upon return *praised = INVALID_EXCEPTION | INEXACT_EXCEPTION
// Note that the flags could be saved in a global variable, but this function
// would still expect that value as an argument passed by reference
*praised = *psavedflags & (*pflagsmask & BID_IEEE_FLAGS);
}
#else
_IDEC_flags
testSavedFlags (_IDEC_flags savedflags, _IDEC_flags flagsmask) {
_IDEC_flags raised;
// the raturn value raised is the logical OR of the flags
// selected by flagsmask, that are set in savedflags; e.g. if
// flagsmask = INVALID_EXCEPTION | UNDERFLOW_EXCEPTION | INEXACT_EXCEPTION and
// only the invalid and inexact flags are raised (set) in savedflags
// then the return value is raised = INVALID_EXCEPTION | INEXACT_EXCEPTION
// Note that the flags could be saved in a global variable, but this function
// would still expect that value as an argument passed by value
raised = savedflags & (flagsmask & BID_IEEE_FLAGS);
return (raised);
}
#endif
#if DECIMAL_CALL_BY_REFERENCE
void
restoreFlags (_IDEC_flags * pflagsvalues,
_IDEC_flags * pflagsmask _EXC_FLAGS_PARAM) {
// restore the status flags selected by *pflagsmask to the values speciafied
// (as a logical OR) in *pflagsvalues; e.g. if
// *pflagsmask = INVALID_EXCEPTION | UNDERFLOW_EXCEPTION | INEXACT_EXCEPTION
// and only the invalid and inexact flags are raised (set) in *pflagsvalues
// then upon return the invalid status flag will be set, the underflow status
// flag will be clear, and the inexact status flag will be set
*pfpsf = *pfpsf & ~(*pflagsmask & BID_IEEE_FLAGS);
// clear flags that have to be restored
*pfpsf = *pfpsf | (*pflagsvalues & (*pflagsmask & BID_IEEE_FLAGS));
// restore flags
}
#else
void
restoreFlags (_IDEC_flags flagsvalues,
_IDEC_flags flagsmask _EXC_FLAGS_PARAM) {
// restore the status flags selected by flagsmask to the values speciafied
// (as a logical OR) in flagsvalues; e.g. if
// flagsmask = INVALID_EXCEPTION | UNDERFLOW_EXCEPTION | INEXACT_EXCEPTION
// and only the invalid and inexact flags are raised (set) in flagsvalues
// then upon return the invalid status flag will be set, the underflow status
// flag will be clear, and the inexact status flag will be set
*pfpsf = *pfpsf & ~(flagsmask & BID_IEEE_FLAGS);
// clear flags that have to be restored
*pfpsf = *pfpsf | (flagsvalues & (flagsmask & BID_IEEE_FLAGS));
// restore flags
}
#endif
#if DECIMAL_CALL_BY_REFERENCE
void
saveFlags (_IDEC_flags * pflagsvalues,
_IDEC_flags * pflagsmask _EXC_FLAGS_PARAM) {
// return in *pflagsvalues the status flags specified (as a logical OR) in
// *pflagsmask; e.g. if
// *pflagsmask = INVALID_EXCEPTION | UNDERFLOW_EXCEPTION | INEXACT_EXCEPTION
// and only the invalid and inexact flags are raised (set) in the status word,
// then upon return the value in *pflagsvalues will have the invalid status
// flag set, the underflow status flag clear, and the inexact status flag set
*pflagsvalues = *pfpsf & (*pflagsmask & BID_IEEE_FLAGS);
}
#else
_IDEC_flags
saveFlags (_IDEC_flags flagsmask _EXC_FLAGS_PARAM) {
_IDEC_flags flagsvalues;
// return the status flags specified (as a logical OR) in flagsmask; e.g. if
// flagsmask = INVALID_EXCEPTION | UNDERFLOW_EXCEPTION | INEXACT_EXCEPTION
// and only the invalid and inexact flags are raised (set) in the status word,
// then the return value will have the invalid status flag set, the
// underflow status flag clear, and the inexact status flag set
flagsvalues = *pfpsf & (flagsmask & BID_IEEE_FLAGS);
return (flagsvalues);
}
#endif
// Note the following definitions from bid_conf.h (rearranged): if the rounding
// mode is global, it has a fixed name recognized by the library functions:
// _IDEC_glbround; rnd_mode, defined as &_IDEC_glbround, can be used instead; no
// argument is passed for the rounding mode to the library functions; if the
// rounding mode is local then it is passed as an arument, by reference or by
// value, to the library functions
//
// #if DECIMAL_CALL_BY_REFERENCE
// #if !DECIMAL_GLOBAL_ROUNDING
// #define _RND_MODE_PARAM , _IDEC_round *prnd_mode
// #else
// #define _RND_MODE_PARAM
// #define rnd_mode _IDEC_glbround
// #endif
// #else
// #if !DECIMAL_GLOBAL_ROUNDING
// #define _RND_MODE_PARAM , _IDEC_round rnd_mode
// #else
// #define _RND_MODE_PARAM
// #define rnd_mode _IDEC_glbround
// #endif
// #endif
#if DECIMAL_CALL_BY_REFERENCE
#if !DECIMAL_GLOBAL_ROUNDING
// #define _RND_MODE_PARAM , _IDEC_round *prnd_mode
void
getDecimalRoundingDirection (_IDEC_round * rounding_mode
_RND_MODE_PARAM) {
// returns the current rounding mode
*rounding_mode = *prnd_mode;
}
#else
// #define _RND_MODE_PARAM
// #define rnd_mode _IDEC_glbround
void
getDecimalRoundingDirection (_IDEC_round * rounding_mode
_RND_MODE_PARAM) {
// returns the current rounding mode
*rounding_mode = rnd_mode;
}
#endif
#else
#if !DECIMAL_GLOBAL_ROUNDING
// #define _RND_MODE_PARAM , _IDEC_round rnd_mode
_IDEC_round
getDecimalRoundingDirection (_IDEC_round rnd_mode) {
// returns the current rounding mode
return (rnd_mode);
}
#else
// #define _RND_MODE_PARAM
// #define rnd_mode _IDEC_glbround
_IDEC_round
getDecimalRoundingDirection (void) {
// returns the current rounding mode
return (rnd_mode);
}
#endif
#endif
#if DECIMAL_CALL_BY_REFERENCE
#if !DECIMAL_GLOBAL_ROUNDING
// #define _RND_MODE_PARAM , _IDEC_round *prnd_mode
void
setDecimalRoundingDirection (_IDEC_round * rounding_mode
_RND_MODE_PARAM) {
// sets the current rounding mode to the value in *rounding_mode, if valid
if (*rounding_mode == ROUNDING_TO_NEAREST ||
*rounding_mode == ROUNDING_DOWN ||
*rounding_mode == ROUNDING_UP ||
*rounding_mode == ROUNDING_TO_ZERO ||
*rounding_mode == ROUNDING_TIES_AWAY) {
*prnd_mode = *rounding_mode;
}
}
#else
// #define _RND_MODE_PARAM
// #define rnd_mode _IDEC_glbround
void
setDecimalRoundingDirection (_IDEC_round * rounding_mode
) {
// sets the global rounding mode to the value in *rounding_mode, if valid
if (*rounding_mode == ROUNDING_TO_NEAREST ||
*rounding_mode == ROUNDING_DOWN ||
*rounding_mode == ROUNDING_UP ||
*rounding_mode == ROUNDING_TO_ZERO ||
*rounding_mode == ROUNDING_TIES_AWAY) {
rnd_mode = *rounding_mode;
}
}
#endif
#else
#if !DECIMAL_GLOBAL_ROUNDING
// #define _RND_MODE_PARAM , _IDEC_round rnd_mode
_IDEC_round
setDecimalRoundingDirection (_IDEC_round rounding_mode _RND_MODE_PARAM) {
// sets the current rounding mode to the value in rounding_mode;
// however, when arguments are passed by value and the rounding mode
// is a local variable, this is not of any use
if (rounding_mode == ROUNDING_TO_NEAREST ||
rounding_mode == ROUNDING_DOWN ||
rounding_mode == ROUNDING_UP ||
rounding_mode == ROUNDING_TO_ZERO ||
rounding_mode == ROUNDING_TIES_AWAY) {
return (rounding_mode);
}
return (rnd_mode);
}
#else
// #define _RND_MODE_PARAM
// #define rnd_mode _IDEC_glbround
void
setDecimalRoundingDirection (_IDEC_round rounding_mode) {
// sets the current rounding mode to the value in rounding_mode, if valid;
if (rounding_mode == ROUNDING_TO_NEAREST ||
rounding_mode == ROUNDING_DOWN ||
rounding_mode == ROUNDING_UP ||
rounding_mode == ROUNDING_TO_ZERO ||
rounding_mode == ROUNDING_TIES_AWAY) {
rnd_mode = rounding_mode;
}
}
#endif
#endif
#if DECIMAL_CALL_BY_REFERENCE
void
is754 (int *retval) {
*retval = 0;
}
#else
int
is754 (void) {
return 0;
}
#endif
#if DECIMAL_CALL_BY_REFERENCE
void
is754R (int *retval) {
*retval = 1;
}
#else
int
is754R (void) {
return 1;
}
#endif
|
