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
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
|
//------------------------------------------------------------------------------
// GB_casting.h: define the unary typecasting functions
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// TODO: complex code is #ifdef'd out when using CUDA.
#ifndef GB_CASTING_H
#define GB_CASTING_H
//------------------------------------------------------------------------------
// pointer casting function, returned by GB_cast_factory.
//------------------------------------------------------------------------------
typedef void (*GB_cast_function) (void *, const void *, size_t) ;
GB_PUBLIC
GB_cast_function GB_cast_factory // returns pointer to function to cast x to z
(
const GB_Type_code code1, // the type of z, the output value
const GB_Type_code code2 // the type of x, the input value
) ;
//------------------------------------------------------------------------------
// typecasting from double to integer
//------------------------------------------------------------------------------
// The GraphBLAS C API states that typecasting follows the rules of the C
// language. However, the ANSI C11 language specification states that results
// are undefined when typecasting a float or double to an integer value that is
// outside the range of the integer type. GraphBLAS handles this case by
// typecasting a float or double that is larger than the maximum integer to the
// max integer, and a value less than the minimum integer to the min integer.
// NaN's are typecasted to the integer value zero.
inline int8_t GB_cast_to_int8_t (double x)
{
if (isnan (x)) return (0) ;
if (x <= (double) INT8_MIN) return (INT8_MIN) ;
if (x >= (double) INT8_MAX) return (INT8_MAX) ;
return ((int8_t) x) ;
}
inline int16_t GB_cast_to_int16_t (double x)
{
if (isnan (x)) return (0) ;
if (x <= (double) INT16_MIN) return (INT16_MIN) ;
if (x >= (double) INT16_MAX) return (INT16_MAX) ;
return ((int16_t) x) ;
}
inline int32_t GB_cast_to_int32_t (double x)
{
if (isnan (x)) return (0) ;
if (x <= (double) INT32_MIN) return (INT32_MIN) ;
if (x >= (double) INT32_MAX) return (INT32_MAX) ;
return ((int32_t) x) ;
}
inline int64_t GB_cast_to_int64_t (double x)
{
if (isnan (x)) return (0) ;
if (x <= (double) INT64_MIN) return (INT64_MIN) ;
if (x >= (double) INT64_MAX) return (INT64_MAX) ;
return ((int64_t) x) ;
}
inline uint8_t GB_cast_to_uint8_t (double x)
{
if (isnan (x) || x <= 0) return (0) ;
if (x >= (double) UINT8_MAX) return (UINT8_MAX) ;
return ((uint8_t) x) ;
}
inline uint16_t GB_cast_to_uint16_t (double x)
{
if (isnan (x) || x <= 0) return (0) ;
if (x >= (double) UINT16_MAX) return (UINT16_MAX) ;
return ((uint16_t) x) ;
}
inline uint32_t GB_cast_to_uint32_t (double x)
{
if (isnan (x) || x <= 0) return (0) ;
if (x >= (double) UINT32_MAX) return (UINT32_MAX) ;
return ((uint32_t) x) ;
}
inline uint64_t GB_cast_to_uint64_t (double x)
{
if (isnan (x) || x <= 0) return (0) ;
if (x >= (double) UINT64_MAX) return (UINT64_MAX) ;
return ((uint64_t) x) ;
}
//------------------------------------------------------------------------------
// unary typecast operators, used in GB_cast_factory.c.
//------------------------------------------------------------------------------
// construct the typecast functions: z = (ztype) x, where x has type xtype.
// GB_cast_ztype_xtype casts a single value ((xtype) x) into the result
// ((ztype) z). Functions with the xtype and ztype the same, such as
// GB_cast_double_double, simply copy their input to their output.
// The s parameter is not used in these functions. It is present because one
// function returned by GB_cast_factory requires it (GB_copy_user_user).
void GB_copy_user_user (void *z, const void *x, size_t s) ;
#define GB_CAST_FUNCTION(ztype,xtype) \
inline void GB (_cast_ ## ztype ## _ ## xtype) \
( \
void *z, /* typecasted output, of type ztype */ \
const void *x, /* input value to typecast, of type xtype */ \
size_t s /* size of type, for GB_copy_user_user only */ \
) \
{ \
xtype xx = (*((xtype *) x)) ; \
ztype zz = GB_CAST (ztype, xx) ; \
(*((ztype *) z)) = zz ; \
}
//------------------------------------------------------------------------------
// typecast to boolean
//------------------------------------------------------------------------------
// Typecasting a NaN to a bool results in 'true', as defined by the ANSI C11
// standard (NaN converts to true, since Nan != 0 is true). GraphBLAS follows
// the ANSI C11 standard in this case.
#undef GB_CAST
#define GB_CAST(ztype,x) (ztype) x
GB_CAST_FUNCTION (bool , bool )
#undef GB_CAST
#define GB_CAST(ztype,x) (x != 0)
GB_CAST_FUNCTION (bool , int8_t )
GB_CAST_FUNCTION (bool , int16_t )
GB_CAST_FUNCTION (bool , int32_t )
GB_CAST_FUNCTION (bool , int64_t )
GB_CAST_FUNCTION (bool , uint8_t )
GB_CAST_FUNCTION (bool , uint16_t )
GB_CAST_FUNCTION (bool , uint32_t )
GB_CAST_FUNCTION (bool , uint64_t )
GB_CAST_FUNCTION (bool , float )
GB_CAST_FUNCTION (bool , double )
#ifndef GBCUDA
// TODO: this does not work on CUDA yet
#undef GB_CAST
#define GB_CAST(ztype,x) (crealf (x) != 0 || cimagf (x) != 0)
GB_CAST_FUNCTION (bool , GxB_FC32_t)
#undef GB_CAST
#define GB_CAST(ztype,x) (creal (x) != 0 || cimag (x) != 0)
GB_CAST_FUNCTION (bool , GxB_FC64_t)
#endif
//------------------------------------------------------------------------------
// typecast to int8_t
//------------------------------------------------------------------------------
#undef GB_CAST
#define GB_CAST(ztype,x) (ztype) x
GB_CAST_FUNCTION (int8_t , bool )
GB_CAST_FUNCTION (int8_t , int8_t )
GB_CAST_FUNCTION (int8_t , int16_t )
GB_CAST_FUNCTION (int8_t , int32_t )
GB_CAST_FUNCTION (int8_t , int64_t )
GB_CAST_FUNCTION (int8_t , uint8_t )
GB_CAST_FUNCTION (int8_t , uint16_t )
GB_CAST_FUNCTION (int8_t , uint32_t )
GB_CAST_FUNCTION (int8_t , uint64_t )
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_int8_t ((double) x)
GB_CAST_FUNCTION (int8_t , float )
GB_CAST_FUNCTION (int8_t , double )
#ifndef GBCUDA
// TODO: this does not work on CUDA yet
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_int8_t ((double) crealf (x))
GB_CAST_FUNCTION (int8_t , GxB_FC32_t)
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_int8_t (creal (x))
GB_CAST_FUNCTION (int8_t , GxB_FC64_t)
#endif
//------------------------------------------------------------------------------
// typecast to int16_t
//------------------------------------------------------------------------------
#undef GB_CAST
#define GB_CAST(ztype,x) (ztype) x
GB_CAST_FUNCTION (int16_t , bool )
GB_CAST_FUNCTION (int16_t , int8_t )
GB_CAST_FUNCTION (int16_t , int16_t )
GB_CAST_FUNCTION (int16_t , int32_t )
GB_CAST_FUNCTION (int16_t , int64_t )
GB_CAST_FUNCTION (int16_t , uint8_t )
GB_CAST_FUNCTION (int16_t , uint16_t )
GB_CAST_FUNCTION (int16_t , uint32_t )
GB_CAST_FUNCTION (int16_t , uint64_t )
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_int16_t ((double) x)
GB_CAST_FUNCTION (int16_t , float )
GB_CAST_FUNCTION (int16_t , double )
#ifndef GBCUDA
// TODO: this does not work on CUDA yet
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_int16_t ((double) crealf (x))
GB_CAST_FUNCTION (int16_t , GxB_FC32_t)
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_int16_t (creal (x))
GB_CAST_FUNCTION (int16_t , GxB_FC64_t)
#endif
//------------------------------------------------------------------------------
// typecast to int32_t
//------------------------------------------------------------------------------
#undef GB_CAST
#define GB_CAST(ztype,x) (ztype) x
GB_CAST_FUNCTION (int32_t , bool )
GB_CAST_FUNCTION (int32_t , int8_t )
GB_CAST_FUNCTION (int32_t , int16_t )
GB_CAST_FUNCTION (int32_t , int32_t )
GB_CAST_FUNCTION (int32_t , int64_t )
GB_CAST_FUNCTION (int32_t , uint8_t )
GB_CAST_FUNCTION (int32_t , uint16_t )
GB_CAST_FUNCTION (int32_t , uint32_t )
GB_CAST_FUNCTION (int32_t , uint64_t )
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_int32_t ((double) x)
GB_CAST_FUNCTION (int32_t , float )
GB_CAST_FUNCTION (int32_t , double )
#ifndef GBCUDA
// TODO: this does not work on CUDA yet
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_int32_t ((double) crealf (x))
GB_CAST_FUNCTION (int32_t , GxB_FC32_t)
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_int32_t (creal (x))
GB_CAST_FUNCTION (int32_t , GxB_FC64_t)
#endif
//------------------------------------------------------------------------------
// typecast to int64_t
//------------------------------------------------------------------------------
#undef GB_CAST
#define GB_CAST(ztype,x) (ztype) x
GB_CAST_FUNCTION (int64_t , bool )
GB_CAST_FUNCTION (int64_t , int8_t )
GB_CAST_FUNCTION (int64_t , int16_t )
GB_CAST_FUNCTION (int64_t , int32_t )
GB_CAST_FUNCTION (int64_t , int64_t )
GB_CAST_FUNCTION (int64_t , uint8_t )
GB_CAST_FUNCTION (int64_t , uint16_t )
GB_CAST_FUNCTION (int64_t , uint32_t )
GB_CAST_FUNCTION (int64_t , uint64_t )
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_int64_t ((double) x)
GB_CAST_FUNCTION (int64_t , float )
GB_CAST_FUNCTION (int64_t , double )
#ifndef GBCUDA
// TODO: this does not work on CUDA yet
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_int64_t ((double) crealf (x))
GB_CAST_FUNCTION (int64_t , GxB_FC32_t)
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_int64_t (creal (x))
GB_CAST_FUNCTION (int64_t , GxB_FC64_t)
#endif
//------------------------------------------------------------------------------
// typecast to uint8_t
//------------------------------------------------------------------------------
#undef GB_CAST
#define GB_CAST(ztype,x) (ztype) x
GB_CAST_FUNCTION (uint8_t , bool )
GB_CAST_FUNCTION (uint8_t , int8_t )
GB_CAST_FUNCTION (uint8_t , int16_t )
GB_CAST_FUNCTION (uint8_t , int32_t )
GB_CAST_FUNCTION (uint8_t , int64_t )
GB_CAST_FUNCTION (uint8_t , uint8_t )
GB_CAST_FUNCTION (uint8_t , uint16_t )
GB_CAST_FUNCTION (uint8_t , uint32_t )
GB_CAST_FUNCTION (uint8_t , uint64_t )
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_uint8_t ((double) x)
GB_CAST_FUNCTION (uint8_t , float )
GB_CAST_FUNCTION (uint8_t , double )
#ifndef GBCUDA
// TODO: this does not work on CUDA yet
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_uint8_t ((double) crealf (x))
GB_CAST_FUNCTION (uint8_t , GxB_FC32_t)
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_uint8_t (creal (x))
GB_CAST_FUNCTION (uint8_t , GxB_FC64_t)
#endif
//------------------------------------------------------------------------------
// typecast to uint16_t
//------------------------------------------------------------------------------
#undef GB_CAST
#define GB_CAST(ztype,x) (ztype) x
GB_CAST_FUNCTION (uint16_t , bool )
GB_CAST_FUNCTION (uint16_t , int8_t )
GB_CAST_FUNCTION (uint16_t , int16_t )
GB_CAST_FUNCTION (uint16_t , int32_t )
GB_CAST_FUNCTION (uint16_t , int64_t )
GB_CAST_FUNCTION (uint16_t , uint8_t )
GB_CAST_FUNCTION (uint16_t , uint16_t )
GB_CAST_FUNCTION (uint16_t , uint32_t )
GB_CAST_FUNCTION (uint16_t , uint64_t )
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_uint16_t ((double) x)
GB_CAST_FUNCTION (uint16_t , float )
GB_CAST_FUNCTION (uint16_t , double )
#ifndef GBCUDA
// TODO: this does not work on CUDA yet
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_uint16_t ((double) crealf (x))
GB_CAST_FUNCTION (uint16_t , GxB_FC32_t)
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_uint16_t (creal (x))
GB_CAST_FUNCTION (uint16_t , GxB_FC64_t)
#endif
//------------------------------------------------------------------------------
// typecast to uint32_t
//------------------------------------------------------------------------------
#undef GB_CAST
#define GB_CAST(ztype,x) (ztype) x
GB_CAST_FUNCTION (uint32_t , bool )
GB_CAST_FUNCTION (uint32_t , int8_t )
GB_CAST_FUNCTION (uint32_t , int16_t )
GB_CAST_FUNCTION (uint32_t , int32_t )
GB_CAST_FUNCTION (uint32_t , int64_t )
GB_CAST_FUNCTION (uint32_t , uint8_t )
GB_CAST_FUNCTION (uint32_t , uint16_t )
GB_CAST_FUNCTION (uint32_t , uint32_t )
GB_CAST_FUNCTION (uint32_t , uint64_t )
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_uint32_t ((double) x)
GB_CAST_FUNCTION (uint32_t , float )
GB_CAST_FUNCTION (uint32_t , double )
#ifndef GBCUDA
// TODO: this does not work on CUDA yet
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_uint32_t ((double) crealf (x))
GB_CAST_FUNCTION (uint32_t , GxB_FC32_t)
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_uint32_t (creal (x))
GB_CAST_FUNCTION (uint32_t , GxB_FC64_t)
#endif
//------------------------------------------------------------------------------
// typecast to uint64_t
//------------------------------------------------------------------------------
#undef GB_CAST
#define GB_CAST(ztype,x) (ztype) x
GB_CAST_FUNCTION (uint64_t , bool )
GB_CAST_FUNCTION (uint64_t , int8_t )
GB_CAST_FUNCTION (uint64_t , int16_t )
GB_CAST_FUNCTION (uint64_t , int32_t )
GB_CAST_FUNCTION (uint64_t , int64_t )
GB_CAST_FUNCTION (uint64_t , uint8_t )
GB_CAST_FUNCTION (uint64_t , uint16_t )
GB_CAST_FUNCTION (uint64_t , uint32_t )
GB_CAST_FUNCTION (uint64_t , uint64_t )
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_uint64_t ((double) x)
GB_CAST_FUNCTION (uint64_t , float )
GB_CAST_FUNCTION (uint64_t , double )
#ifndef GBCUDA
// TODO: this does not work on CUDA yet
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_uint64_t ((double) crealf (x))
GB_CAST_FUNCTION (uint64_t , GxB_FC32_t)
#undef GB_CAST
#define GB_CAST(ztype,x) GB_cast_to_uint64_t (creal (x))
GB_CAST_FUNCTION (uint64_t , GxB_FC64_t)
#endif
//------------------------------------------------------------------------------
// typecast to float
//------------------------------------------------------------------------------
#undef GB_CAST
#define GB_CAST(ztype,x) (ztype) x
GB_CAST_FUNCTION (float , bool )
GB_CAST_FUNCTION (float , int8_t )
GB_CAST_FUNCTION (float , int16_t )
GB_CAST_FUNCTION (float , int32_t )
GB_CAST_FUNCTION (float , int64_t )
GB_CAST_FUNCTION (float , uint8_t )
GB_CAST_FUNCTION (float , uint16_t )
GB_CAST_FUNCTION (float , uint32_t )
GB_CAST_FUNCTION (float , uint64_t )
GB_CAST_FUNCTION (float , float )
GB_CAST_FUNCTION (float , double )
#ifndef GBCUDA
// TODO: this does not work on CUDA yet
#undef GB_CAST
#define GB_CAST(ztype,x) crealf (x)
GB_CAST_FUNCTION (float , GxB_FC32_t)
#undef GB_CAST
#define GB_CAST(ztype,x) ((float) creal (x))
GB_CAST_FUNCTION (float , GxB_FC64_t)
#endif
//------------------------------------------------------------------------------
// typecast to double
//------------------------------------------------------------------------------
#undef GB_CAST
#define GB_CAST(ztype,x) (ztype) x
GB_CAST_FUNCTION (double , bool )
GB_CAST_FUNCTION (double , int8_t )
GB_CAST_FUNCTION (double , int16_t )
GB_CAST_FUNCTION (double , int32_t )
GB_CAST_FUNCTION (double , int64_t )
GB_CAST_FUNCTION (double , uint8_t )
GB_CAST_FUNCTION (double , uint16_t )
GB_CAST_FUNCTION (double , uint32_t )
GB_CAST_FUNCTION (double , uint64_t )
GB_CAST_FUNCTION (double , float )
GB_CAST_FUNCTION (double , double )
#ifndef GBCUDA
// TODO: this does not work on CUDA yet
#undef GB_CAST
#define GB_CAST(ztype,x) ((double) crealf (x))
GB_CAST_FUNCTION (double , GxB_FC32_t)
#undef GB_CAST
#define GB_CAST(ztype,x) creal (x)
GB_CAST_FUNCTION (double , GxB_FC64_t)
#endif
//------------------------------------------------------------------------------
// typecast to float complex
//------------------------------------------------------------------------------
#undef GB_CAST
#define GB_CAST(ztype,x) GxB_CMPLXF ((float) x, (float) 0)
GB_CAST_FUNCTION (GxB_FC32_t, bool )
GB_CAST_FUNCTION (GxB_FC32_t, int8_t )
GB_CAST_FUNCTION (GxB_FC32_t, int16_t )
GB_CAST_FUNCTION (GxB_FC32_t, int32_t )
GB_CAST_FUNCTION (GxB_FC32_t, int64_t )
GB_CAST_FUNCTION (GxB_FC32_t, uint8_t )
GB_CAST_FUNCTION (GxB_FC32_t, uint16_t )
GB_CAST_FUNCTION (GxB_FC32_t, uint32_t )
GB_CAST_FUNCTION (GxB_FC32_t, uint64_t )
GB_CAST_FUNCTION (GxB_FC32_t, float )
GB_CAST_FUNCTION (GxB_FC32_t, double )
#ifndef GBCUDA
// TODO: this does not work on CUDA yet
#undef GB_CAST
#define GB_CAST(ztype,x) x
GB_CAST_FUNCTION (GxB_FC32_t, GxB_FC32_t)
#undef GB_CAST
#define GB_CAST(ztype,x) GxB_CMPLXF ((float) creal (x), (float) cimag (x))
GB_CAST_FUNCTION (GxB_FC32_t, GxB_FC64_t)
#endif
//------------------------------------------------------------------------------
// typecast to double complex
//------------------------------------------------------------------------------
#undef GB_CAST
#define GB_CAST(ztype,x) GxB_CMPLX ((double) x, (double) 0)
GB_CAST_FUNCTION (GxB_FC64_t, bool )
GB_CAST_FUNCTION (GxB_FC64_t, int8_t )
GB_CAST_FUNCTION (GxB_FC64_t, int16_t )
GB_CAST_FUNCTION (GxB_FC64_t, int32_t )
GB_CAST_FUNCTION (GxB_FC64_t, int64_t )
GB_CAST_FUNCTION (GxB_FC64_t, uint8_t )
GB_CAST_FUNCTION (GxB_FC64_t, uint16_t )
GB_CAST_FUNCTION (GxB_FC64_t, uint32_t )
GB_CAST_FUNCTION (GxB_FC64_t, uint64_t )
GB_CAST_FUNCTION (GxB_FC64_t, float )
GB_CAST_FUNCTION (GxB_FC64_t, double )
#ifndef GBCUDA
// TODO: this does not work on CUDA yet
#undef GB_CAST
#define GB_CAST(ztype,x) GxB_CMPLX ((double) crealf (x), (double) cimagf (x))
GB_CAST_FUNCTION (GxB_FC64_t, GxB_FC32_t)
#undef GB_CAST
#define GB_CAST(ztype,x) x
GB_CAST_FUNCTION (GxB_FC64_t, GxB_FC64_t)
#endif
#undef GB_CAST
#undef GB_CAST_FUNCTION
//------------------------------------------------------------------------------
// GB_mcast: cast a mask entry from any native type to boolean
//------------------------------------------------------------------------------
// The mask matrix M must be one of the native data types, which have sizes of
// 1, 2, 4, 8, or 16 bytes. The value could be properly typecasted to bool,
// but this requires a function pointer to the proper GB_cast_function.
// Instead, it is faster to simply use type punning, based on the size of the
// data type, and use the inline GB_mcast function instead.
static inline bool GB_mcast // return the value of M(i,j)
(
const GB_void *restrict Mx, // mask values
const int64_t pM, // extract boolean value of Mx [pM]
const size_t msize // size of each data type
)
{
if (Mx == NULL)
{
// If Mx is NULL, then values in the mask matrix M are ignored, and
// only the structural pattern is used. This function is only called
// for entries M(i,j) in the structure of M, so the result is always
// true if Mx is NULL.
return (true) ;
}
else
{
// check the value of M(i,j)
switch (msize)
{
default:
case GB_1BYTE: return ((*(uint8_t *) (Mx +((pM)*1))) != 0) ;
case GB_2BYTE: return ((*(uint16_t *) (Mx +((pM)*2))) != 0) ;
case GB_4BYTE: return ((*(uint32_t *) (Mx +((pM)*4))) != 0) ;
case GB_8BYTE: return ((*(uint64_t *) (Mx +((pM)*8))) != 0) ;
case GB_16BYTE:
{
const uint64_t *restrict Zx = (uint64_t *) Mx ;
return (Zx [2*pM] != 0 || Zx [2*pM+1] != 0) ;
}
}
}
}
#endif
|
