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
|
// Start of ispc_util.h.
// This header file implements various operations that are useful only when
// generating ISPC code. This includes wrappers for parts of Futhark's C runtime.
// Expose gang size
export uniform int64_t get_gang_size() {
return programCount;
}
// Generate missing overloads for extract on pointers
#define make_extract(ty) \
static inline uniform ty * uniform extract(uniform ty * varying ptr, uniform int idx) { \
int64 c = (int64)ptr; \
uniform int64 r = extract(c, idx); \
return (uniform ty * uniform)r; \
}
make_extract(int8)
make_extract(int16)
make_extract(int32)
make_extract(int64)
make_extract(uint8)
make_extract(uint16)
make_extract(uint32)
make_extract(uint64)
make_extract(float16)
make_extract(float)
make_extract(double)
/* make_extract(int8* uniform) */
/* make_extract(int16* uniform) */
/* make_extract(int32* uniform) */
/* make_extract(int64* uniform) */
/* make_extract(uint8* uniform) */
/* make_extract(uint16* uniform) */
/* make_extract(uint32* uniform) */
/* make_extract(uint64* uniform) */
/* make_extract(float16* uniform) */
/* make_extract(float* uniform) */
/* make_extract(double* uniform) */
make_extract(struct futhark_context)
make_extract(struct memblock)
// Handling of atomics
// Atomic CAS acts differently in GCC and ISPC, so we emulate it.
#define make_atomic_compare_exchange_wrapper(ty) \
static inline uniform bool atomic_compare_exchange_wrapper(uniform ty * uniform mem, \
uniform ty * uniform old, \
const uniform ty val){ \
uniform ty actual = atomic_compare_exchange_global(mem, *old, val); \
if (actual == *old){ \
return 1; \
} \
*old = actual; \
return 0; \
} \
static inline varying bool atomic_compare_exchange_wrapper(uniform ty * varying mem, \
varying ty * uniform old, \
const varying ty val){ \
varying ty actual = atomic_compare_exchange_global(mem, *old, val); \
bool res = 0; \
if(actual == *old){ \
res = 1; \
} else { \
*old = actual; \
} \
return res; \
} \
static inline varying bool atomic_compare_exchange_wrapper(varying ty * uniform mem, \
varying ty * uniform old, \
const varying ty val){ \
uniform ty * uniform base_mem = (uniform ty * uniform)mem; \
uniform ty * uniform base_old = (uniform ty * uniform)old; \
bool res = 0; \
foreach_active (i) { \
uniform ty * uniform curr_mem = base_mem + i; \
uniform ty * uniform curr_old = base_old + i; \
uniform ty curr_val = extract(val, i); \
uniform bool curr = atomic_compare_exchange_wrapper( \
curr_mem, curr_old, curr_val); \
res = insert(res, i, curr); \
} \
return res; \
} \
static inline uniform bool atomic_compare_exchange_wrapper(uniform ty * uniform mem, \
uniform ty * uniform old, \
const varying ty val){ \
uniform ty v = 0; \
foreach_active (i) v = extract(val, i); \
return atomic_compare_exchange_wrapper(mem, old, v); \
}
make_atomic_compare_exchange_wrapper(int32)
make_atomic_compare_exchange_wrapper(int64)
make_atomic_compare_exchange_wrapper(uint32)
make_atomic_compare_exchange_wrapper(uint64)
make_atomic_compare_exchange_wrapper(float)
make_atomic_compare_exchange_wrapper(double)
// This code generates missing overloads for atomic operations on uniform
// pointers to varying values.
#define make_single_atomic(name, ty) \
static inline ty atomic_##name##_global(varying ty * uniform mem, ty val) { \
uniform ty * uniform base_mem = (uniform ty * uniform)mem; \
ty res = 0; \
foreach_active (i) { \
uniform ty * uniform curr_mem = base_mem + i; \
uniform ty curr_val = extract(val, i); \
uniform ty curr = atomic_##name##_global(curr_mem, curr_val); \
res = insert(res, i, curr); \
} \
return res; \
}
#define make_all_atomic(name) \
make_single_atomic(name, int32) \
make_single_atomic(name, int64) \
make_single_atomic(name, uint32) \
make_single_atomic(name, uint64)
make_all_atomic(add)
make_all_atomic(subtract)
make_all_atomic(and)
make_all_atomic(or)
make_all_atomic(xor)
make_all_atomic(swap)
// This is a hack to prevent literals (which have unbound variability)
// from causing us to pick the wrong overload for atomic operations.
static inline varying int32 make_varying(uniform int32 x) { return x; }
static inline varying int32 make_varying(varying int32 x) { return x; }
static inline varying int64 make_varying(uniform int64 x) { return x; }
static inline varying int64 make_varying(varying int64 x) { return x; }
static inline varying uint32 make_varying(uniform uint32 x) { return x; }
static inline varying uint32 make_varying(varying uint32 x) { return x; }
static inline varying uint64 make_varying(uniform uint64 x) { return x; }
static inline varying uint64 make_varying(varying uint64 x) { return x; }
// Redirect atomic operations to the relevant ISPC overloads.
#define __atomic_fetch_add(x,y,z) atomic_add_global(x,make_varying(y))
#define __atomic_fetch_sub(x,y,z) atomic_sub_global(x,make_varying(y))
#define __atomic_fetch_and(x,y,z) atomic_and_global(x,make_varying(y))
#define __atomic_fetch_or(x,y,z) atomic_or_global(x,make_varying(y))
#define __atomic_fetch_xor(x,y,z) atomic_xor_global(x,make_varying(y))
#define __atomic_exchange_n(x,y,z) atomic_swap_global(x,make_varying(y))
#define __atomic_compare_exchange_n(x,y,z,h,j,k) atomic_compare_exchange_wrapper(x,y,z)
// Memory allocation handling
struct memblock {
int32_t * references;
uint8_t * mem;
int64_t size;
const int8_t * desc;
};
static inline void free(void* ptr) {
delete ptr;
}
static inline void free(void* uniform ptr) {
delete ptr;
}
extern "C" unmasked uniform unsigned char * uniform realloc(uniform unsigned char * uniform ptr, uniform int64_t new_size);
extern "C" unmasked uniform char * uniform lexical_realloc_error(uniform struct futhark_context * uniform ctx, uniform int64_t new_size);
static inline uniform int lexical_realloc(uniform struct futhark_context * uniform ctx,
unsigned char uniform * uniform * uniform ptr,
int64_t uniform * uniform old_size,
uniform int64_t new_size) {
uniform unsigned char * uniform memptr = realloc(*ptr, new_size);
if (memptr == NULL) {
lexical_realloc_error(ctx, new_size);
return FUTHARK_OUT_OF_MEMORY;
} else {
*ptr = memptr;
*old_size = new_size;
return FUTHARK_SUCCESS;
}
}
static inline uniform int lexical_realloc(uniform struct futhark_context *ctx,
unsigned char uniform * uniform * uniform ptr,
int64_t uniform * uniform old_size,
varying int64_t new_size) {
return lexical_realloc(ctx, ptr, old_size, reduce_max(new_size));
}
static inline uniform int lexical_realloc(uniform struct futhark_context * uniform ctx,
unsigned char uniform * varying * uniform ptr,
int64_t uniform * varying old_size,
varying int64_t new_size) {
uniform int err = FUTHARK_SUCCESS;
foreach_active(i){
uniform unsigned char * uniform memptr = realloc(extract(*ptr,i), extract(new_size,i));
if (memptr == NULL) {
lexical_realloc_error(ctx, extract(new_size,i));
err = FUTHARK_OUT_OF_MEMORY;
} else {
*ptr = (uniform unsigned char * varying)insert((int64_t)*ptr, i, (uniform int64_t) memptr);
*old_size = new_size;
}
}
return err;
}
static inline uniform int lexical_realloc(uniform struct futhark_context * uniform ctx,
unsigned char uniform * varying * uniform ptr,
int64_t varying * uniform old_size,
varying int64_t new_size) {
uniform int err = FUTHARK_SUCCESS;
foreach_active(i){
uniform unsigned char * uniform memptr = realloc(extract(*ptr,i), extract(new_size,i));
if (memptr == NULL) {
lexical_realloc_error(ctx, extract(new_size,i));
err = FUTHARK_OUT_OF_MEMORY;
} else {
*ptr = (uniform unsigned char * varying)insert((int64_t)*ptr, i, (uniform int64_t) memptr);
*old_size = new_size;
}
}
return err;
}
static inline uniform int lexical_realloc(uniform struct futhark_context * uniform ctx,
unsigned char uniform * varying * uniform ptr,
size_t varying * uniform old_size,
varying int64_t new_size) {
return lexical_realloc(ctx, ptr, (varying int64_t * uniform)old_size, new_size);
}
static inline uniform int lexical_realloc(uniform struct futhark_context * uniform ctx,
unsigned char varying * uniform * uniform ptr,
size_t varying * uniform old_size,
uniform int64_t new_size) {
uniform int err = FUTHARK_SUCCESS;
uniform unsigned char * uniform memptr = realloc((uniform unsigned char * uniform )*ptr,
new_size*programCount);
if (memptr == NULL) {
lexical_realloc_error(ctx, new_size);
err = FUTHARK_OUT_OF_MEMORY;
} else {
*ptr = (varying unsigned char * uniform)memptr;
*old_size = new_size;
}
return err;
}
static inline uniform int lexical_realloc(uniform struct futhark_context * uniform ctx,
unsigned char varying * uniform * uniform ptr,
size_t varying * uniform old_size,
varying int64_t new_size) {
return lexical_realloc(ctx, ptr, old_size, reduce_max(new_size));
}
extern "C" unmasked uniform int memblock_unref(uniform struct futhark_context * uniform ctx,
uniform struct memblock * uniform lhs,
uniform const char * uniform lhs_desc);
static uniform int memblock_unref(uniform struct futhark_context * varying ctx,
uniform struct memblock * varying lhs,
uniform const char * uniform lhs_desc)
{
uniform int err = 0;
foreach_active(i) {
err |= memblock_unref(extract(ctx,i), extract(lhs,i), lhs_desc);
}
return err;
}
static uniform int memblock_unref(uniform struct futhark_context * uniform ctx,
varying struct memblock * uniform lhs,
uniform const char * uniform lhs_desc)
{
uniform int err = 0;
varying struct memblock _lhs = *lhs;
uniform struct memblock aos[programCount];
aos[programIndex] = _lhs;
foreach_active(i){
err |= memblock_unref(ctx,
&aos[i],
lhs_desc);
}
*lhs = aos[programIndex];
return err;
}
extern "C" unmasked uniform int memblock_alloc(uniform struct futhark_context * uniform ctx,
uniform struct memblock * uniform block,
uniform int64_t size,
uniform const char * uniform block_desc);
static uniform int memblock_alloc(uniform struct futhark_context * varying ctx,
uniform struct memblock * varying block,
varying int64_t size,
uniform const char * uniform block_desc) {
uniform int err = 0;
foreach_active(i){
err |= memblock_alloc(extract(ctx,i), extract(block,i), extract(size, i), block_desc);
}
return err;
}
static uniform int memblock_alloc(uniform struct futhark_context * uniform ctx,
varying struct memblock * uniform block,
uniform int64_t size,
uniform const char * uniform block_desc) {
uniform int err = 0;
varying struct memblock _block = *block;
uniform struct memblock aos[programCount];
aos[programIndex] = _block;
foreach_active(i){
err |= memblock_alloc(ctx, &aos[i], size, block_desc);
}
*block = aos[programIndex];
return err;
}
static uniform int memblock_alloc(uniform struct futhark_context * uniform ctx,
varying struct memblock * uniform block,
varying int64_t size,
uniform const char * uniform block_desc) {
uniform int err = 0;
varying struct memblock _block = *block;
uniform struct memblock aos[programCount];
aos[programIndex] = _block;
foreach_active(i){
err |= memblock_alloc(ctx, &aos[i], extract(size, i), block_desc);
}
*block = aos[programIndex];
return err;
}
extern "C" unmasked uniform int memblock_set(uniform struct futhark_context * uniform ctx,
uniform struct memblock * uniform lhs,
uniform struct memblock * uniform rhs,
uniform const char * uniform lhs_desc);
static uniform int memblock_set (uniform struct futhark_context * uniform ctx,
varying struct memblock * uniform lhs,
varying struct memblock * uniform rhs,
uniform const char * uniform lhs_desc) {
uniform int err = 0;
varying struct memblock _lhs = *lhs;
varying struct memblock _rhs = *rhs;
uniform struct memblock aos1[programCount];
aos1[programIndex] = _lhs;
uniform struct memblock aos2[programCount];
aos2[programIndex] = _rhs;
foreach_active(i) {
err |= memblock_set(ctx,
&aos1[i],
&aos2[i],
lhs_desc);
}
*lhs = aos1[programIndex];
*rhs = aos2[programIndex];
return err;
}
static uniform int memblock_set (uniform struct futhark_context * uniform ctx,
varying struct memblock * uniform lhs,
uniform struct memblock * uniform rhs,
uniform const char * uniform lhs_desc) {
uniform int err = 0;
varying struct memblock _lhs = *lhs;
uniform struct memblock aos1[programCount];
aos1[programIndex] = _lhs;
foreach_active(i) {
err |= memblock_set(ctx,
&aos1[i],
rhs,
lhs_desc);
}
*lhs = aos1[programIndex];
return err;
}
// End of ispc_util.h.
|
