aboutsummaryrefslogblamecommitdiffstats
path: root/erts/include/internal/libatomic_ops/ethr_dw_atomic.h
blob: ce9b251cbe88a9e4e147c013c076f8934c2e2bd7 (plain) (tree)
1
2
3
4
5
6
7
8
9
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
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568




                                                   


                                                                   
  






                                                                           







































































































































































































































































































































































































































































































































































                                                                                                               
/*
 * %CopyrightBegin%
 *
 * Copyright Ericsson AB 2014. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * %CopyrightEnd%
 */

/*
 * Description: Native double word atomics using libatomic_ops
 * Author: Rickard Green
 */

#ifndef ETHR_LIBATOMIC_OPS_DW_ATOMIC_H__
#define ETHR_LIBATOMIC_OPS_DW_ATOMIC_H__

#if defined(AO_HAVE_double_t)						\
    && (defined(AO_HAVE_double_load_acquire)				\
	|| defined(AO_HAVE_double_load))				\
    && (defined(AO_HAVE_compare_double_and_swap_double)			\
	|| defined(AO_HAVE_compare_double_and_swap_double_full)		\
	|| defined(AO_HAVE_compare_double_and_swap_double_acquire)	\
	|| defined(AO_HAVE_compare_double_and_swap_double_release)	\
	|| defined(AO_HAVE_double_compare_and_swap)			\
	|| defined(AO_HAVE_double_compare_and_swap_full)		\
	|| defined(AO_HAVE_double_compare_and_swap_acquire)		\
	|| defined(AO_HAVE_double_compare_and_swap_release))

#if ETHR_SIZEOF_PTR == 4
#  define ETHR_NATIVE_SU_DW_SINT_T ethr_sint64_t
#elif ETHR_SIZEOF_PTR == 8 && defined(ETHR_HAVE_INT128_T)
#  define ETHR_NATIVE_SU_DW_SINT_T ethr_sint128_t
#endif

typedef union {
    volatile AO_double_t dw_mem;
#if defined(ETHR_NATIVE_SU_DW_SINT_T)
    ETHR_NATIVE_SU_DW_SINT_T su_dw_sint;
#endif
} ethr_native_dw_atomic_t;

#if defined(ETHR_NATIVE_SU_DW_SINT_T)
#  define ETHR_HAVE_NATIVE_SU_DW_ATOMIC
#else
#  define ETHR_HAVE_NATIVE_DW_ATOMIC
#endif

#define ETHR_NATIVE_DW_ATOMIC_IMPL ETHR_NATIVE_IMPL__

#if defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_ATOMIC_IMPL__)


#if defined(ETHR_NATIVE_SU_DW_SINT_T)
#  define ETHR_NDWA_FUNC__(Func) ethr_native_su_dw_atomic_ ## Func
#  define ETHR_NDWA_RET_3_TYPE__ ETHR_NATIVE_SU_DW_SINT_T
#  define ETHR_NDWA_RET_2_TYPE__ ETHR_NATIVE_SU_DW_SINT_T
#  define ETHR_NDWA_VAL_ARG_TYPE__ ETHR_NATIVE_SU_DW_SINT_T
#  define ETHR_NDWA_DECL_ARG__(Arg)
#  if defined(AO_HAVE_DOUBLE_PTR_STORAGE)
#    define ETHR_NDWA_VAL2AOVAL__(AOV, V)			\
    ((AOV).AO_whole = (double_ptr_storage) (V))
#    define ETHR_NDWA_AOVAL2VAL__(AOV, V)			\
    ((V) = (ETHR_NATIVE_SU_DW_SINT_T) (AOV).AO_whole)
#    define ETHR_NDWA_RETURN_VAL_3__(SUCCESS, AOVAL, VAL)	\
    do {							\
	return (ETHR_NATIVE_SU_DW_SINT_T) (AOVAL).AO_whole;	\
    } while (0)
#    define ETHR_NDWA_RETURN_VAL_2__(AOVAL, VAL)		\
    do {							\
	return (ETHR_NATIVE_SU_DW_SINT_T) (AOVAL).AO_whole;	\
    } while (0)
#    define ETHR_NDWA_AOVAL_EQ__(AOV1, AOV2)			\
    ((AOV1).AO_whole == (AOV2).AO_whole)
#  else
typedef union {
    ethr_sint_t sint[2];
    ETHR_NATIVE_SU_DW_SINT_T dw_sint;
}  ethr_dw_splitter_t;
#    define ETHR_NDWA_VAL2AOVAL__(AOV, V)			\
    do {							\
	ethr_dw_splitter_t tmp__;				\
	tmp__.dw_sint = (V);					\
	(AOV).AO_val1 = (AO_t) tmp__.sint[0];			\
	(AOV).AO_val2 = (AO_t) tmp__.sint[1];			\
    } while (0)
#    define ETHR_NDWA_AOVAL2VAL__(AOV, V)			\
    do {							\
	ethr_dw_splitter_t tmp__;				\
	tmp__.sint[0] = (ethr_sint_t) (AOV).AO_val1;		\
	tmp__.sint[1] = (ethr_sint_t) (AOV).AO_val2;		\
	(V) = tmp__.dw_sint;					\
    } while (0)
#    define ETHR_NDWA_RETURN_VAL_3__(SUCCESS, AOVAL, VAL)	\
    do {							\
	ethr_dw_splitter_t tmp__;				\
	tmp__.sint[0] = (ethr_sint_t) (AOVAL).AO_val1;		\
	tmp__.sint[1] = (ethr_sint_t) (AOVAL).AO_val2;		\
	return tmp__.dw_sint;					\
    } while (0)
#    define ETHR_NDWA_AOVAL_EQ__(AOV1, AOV2)			\
    ((AOV1).AO_val1 == (AOV2).AO_val1				\
	 && (AOV1).AO_val2 == (AOV2).AO_val2)
#  endif
#else
#  define ETHR_NDWA_FUNC__(Func) ethr_native_dw_atomic_ ## Func
#  define ETHR_NDWA_RET_3_TYPE__ int
#  define ETHR_NDWA_RET_2_TYPE__ void
#  define ETHR_NDWA_VAL_ARG_TYPE__ ethr_sint_t *
#  define ETHR_NDWA_DECL_ARG__(Arg) , ETHR_NDWA_VAL_ARG_TYPE__ Arg
#    define ETHR_NDWA_VAL2AOVAL__(AOV, V)			\
    do {							\
	(AOV).AO_val1 = (AO_t) (V)[0];				\
	(AOV).AO_val2 = (AO_t) (V)[1];				\
    } while (0)
#    define ETHR_NDWA_AOVAL2VAL__(AOV, V)			\
    do {							\
	ethr_dw_splitter_t tmp__;				\
	(V)[0] = (ethr_sint_t) (AOV).AO_val1;			\
	(V)[1] = (ethr_sint_t) (AOV).AO_val2;			\
    } while (0)
#    define ETHR_NDWA_RETURN_VAL_3__(SUCCESS, AOVAL, VAL)	\
    do {							\
	(VAL)[0] = (ethr_sint_t) (AOVAL).AO_val1;		\
	(VAL)[1] = (ethr_sint_t) (AOVAL).AO_val2;		\
	return (SUCCESS);					\
    } while (0)
#    define ETHR_NDWA_RETURN_VAL_2__(AOVAL, VAL)		\
    do {							\
	(VAL)[0] = (ethr_sint_t) (AOVAL).AO_val1;		\
	(VAL)[1] = (ethr_sint_t) (AOVAL).AO_val2;		\
	return;							\
    } while (0)
#  if defined(AO_HAVE_DOUBLE_PTR_STORAGE)
#    define ETHR_NDWA_AOVAL_EQ__(AOV1, AOV2)			\
    ((AOV1).AO_whole == (AOV2).AO_whole)
#  else
#    define ETHR_NDWA_AOVAL_EQ__(AOV1, AOV2)			\
    ((AOV1).AO_val1 == (AOV2).AO_val1				\
	 && (AOV1).AO_val2 == (AOV2).AO_val2)
#  endif
#endif

#define ETHR_HAVE_ETHR_NATIVE_DW_ATOMIC_ADDR
static ETHR_INLINE ethr_sint_t *
ethr_native_dw_atomic_addr(ethr_native_dw_atomic_t *var)
{
    return (ethr_sint_t *) &var->dw_mem;
}

#ifdef AO_HAVE_double_load

#if defined(ETHR_NATIVE_SU_DW_SINT_T)
#  define ETHR_HAVE_ETHR_NATIVE_SU_DW_ATOMIC_READ
#else
#  define ETHR_HAVE_ETHR_NATIVE_DW_ATOMIC_READ
#endif

static ETHR_INLINE ETHR_NDWA_RET_2_TYPE__
ETHR_NDWA_FUNC__(read)(ethr_native_dw_atomic_t *var
		       ETHR_NDWA_DECL_ARG__(val))
{
    AO_double_t act = AO_double_load(&var->dw_mem);
    ETHR_NDWA_RETURN_VAL_2__(act, val);
}

#endif

#ifdef AO_HAVE_double_load_read

#if defined(ETHR_NATIVE_SU_DW_SINT_T)
#  define ETHR_HAVE_ETHR_NATIVE_SU_DW_ATOMIC_READ_RB
#else
#  define ETHR_HAVE_ETHR_NATIVE_DW_ATOMIC_READ_RB
#endif

static ETHR_INLINE ETHR_NDWA_RET_2_TYPE__
ETHR_NDWA_FUNC__(read_rb)(ethr_native_dw_atomic_t *var
			  ETHR_NDWA_DECL_ARG__(val))
{
    AO_double_t act = AO_double_load_read(&var->dw_mem);
    ETHR_NDWA_RETURN_VAL_2__(act, val);
}

#endif

#ifdef AO_HAVE_double_load_acquire

#if defined(ETHR_NATIVE_SU_DW_SINT_T)
#  define ETHR_HAVE_ETHR_NATIVE_SU_DW_ATOMIC_READ_ACQB
#else
#  define ETHR_HAVE_ETHR_NATIVE_DW_ATOMIC_READ_ACQB
#endif

static ETHR_INLINE ETHR_NDWA_RET_2_TYPE__
ETHR_NDWA_FUNC__(read_acqb)(ethr_native_dw_atomic_t *var
			    ETHR_NDWA_DECL_ARG__(val))
{
    AO_double_t act = AO_double_load_acquire(&var->dw_mem);
    ETHR_NDWA_RETURN_VAL_2__(act, val);
}

#endif

#ifdef AO_HAVE_double_store

#if defined(ETHR_NATIVE_SU_DW_SINT_T)
#  define ETHR_HAVE_ETHR_NATIVE_SU_DW_ATOMIC_SET
#else
#  define ETHR_HAVE_ETHR_NATIVE_DW_ATOMIC_SET
#endif

static ETHR_INLINE void
ETHR_NDWA_FUNC__(set)(ethr_native_dw_atomic_t *var,
		      ETHR_NDWA_VAL_ARG_TYPE__ val)
{
    AO_double_t new;
    ETHR_NDWA_VAL2AOVAL__(new, val);
    AO_double_store(&var->dw_mem, new);
}

#endif

#ifdef AO_HAVE_double_store_write

#if defined(ETHR_NATIVE_SU_DW_SINT_T)
#  define ETHR_HAVE_ETHR_NATIVE_SU_DW_ATOMIC_SET_WB
#else
#  define ETHR_HAVE_ETHR_NATIVE_DW_ATOMIC_SET_WB
#endif

static ETHR_INLINE void
ETHR_NDWA_FUNC__(set_wb)(ethr_native_dw_atomic_t *var,
			 ETHR_NDWA_VAL_ARG_TYPE__ val)
{
    AO_double_t new;
    ETHR_NDWA_VAL2AOVAL__(new, val);
    AO_double_store_write(&var->dw_mem, new);
}

#endif

#ifdef AO_HAVE_double_store_release

#if defined(ETHR_NATIVE_SU_DW_SINT_T)
#  define ETHR_HAVE_ETHR_NATIVE_SU_DW_ATOMIC_SET_RELB
#else
#  define ETHR_HAVE_ETHR_NATIVE_DW_ATOMIC_SET_RELB
#endif

static ETHR_INLINE void
ETHR_NDWA_FUNC__(set_relb)(ethr_native_dw_atomic_t *var,
			   ETHR_NDWA_VAL_ARG_TYPE__ val)
{
    AO_double_t new;
    ETHR_NDWA_VAL2AOVAL__(new, val);
    AO_double_store_release(&var->dw_mem, new);
}

#endif

#if defined(AO_HAVE_double_compare_and_swap_full) || defined(AO_HAVE_compare_double_and_swap_double_full)

#if defined(ETHR_NATIVE_SU_DW_SINT_T)
#  define ETHR_HAVE_ETHR_NATIVE_SU_DW_ATOMIC_CMPXCHG_MB
#else
#  define ETHR_HAVE_ETHR_NATIVE_DW_ATOMIC_CMPXCHG_MB
#endif

static ETHR_INLINE ETHR_NDWA_RET_3_TYPE__
ETHR_NDWA_FUNC__(cmpxchg_mb)(ethr_native_dw_atomic_t *var,
			     ETHR_NDWA_VAL_ARG_TYPE__ new,
			     ETHR_NDWA_VAL_ARG_TYPE__ exp)
{
    AO_double_t ao_act, ao_new, ao_exp;

    ETHR_NDWA_VAL2AOVAL__(ao_exp, exp);
    ETHR_NDWA_VAL2AOVAL__(ao_new, new);

    do {
	int xchgd;
#if defined(AO_HAVE_double_compare_and_swap_full)
	xchgd = AO_double_compare_and_swap_full(&var->dw_mem, ao_exp, ao_new);
#elif defined(AO_HAVE_compare_double_and_swap_double_full)
	xchgd = AO_compare_double_and_swap_double_full(&var->dw_mem,
						       ao_exp.AO_val1,
						       ao_exp.AO_val2,
						       ao_new.AO_val1,
						       ao_new.AO_val2);
#endif

	if (xchgd)
	    ETHR_NDWA_RETURN_VAL_3__(1, ao_exp, exp);

#ifdef AO_HAVE_double_load_acquire
	ao_act = AO_double_load_acquire(&var->dw_mem);
#else
	ao_act = AO_double_load(&var->dw_mem);
#endif

    } while (ETHR_NDWA_AOVAL_EQ__(ao_exp, ao_act));

#ifndef AO_HAVE_double_load_acquire
    AO_nop_full();
#endif

    ETHR_NDWA_RETURN_VAL_3__(1, ao_act, exp);
}

#endif

#if defined(AO_HAVE_double_compare_and_swap) || defined(AO_HAVE_compare_double_and_swap_double)

#if defined(ETHR_NATIVE_SU_DW_SINT_T)
#  define ETHR_HAVE_ETHR_NATIVE_SU_DW_ATOMIC_CMPXCHG
#else
#  define ETHR_HAVE_ETHR_NATIVE_DW_ATOMIC_CMPXCHG
#endif

static ETHR_INLINE ETHR_NDWA_RET_3_TYPE__
ETHR_NDWA_FUNC__(cmpxchg)(ethr_native_dw_atomic_t *var,
			  ETHR_NDWA_VAL_ARG_TYPE__ new,
			  ETHR_NDWA_VAL_ARG_TYPE__ exp)
{
    AO_double_t ao_act, ao_new, ao_exp;

    ETHR_NDWA_VAL2AOVAL__(ao_exp, exp);
    ETHR_NDWA_VAL2AOVAL__(ao_new, new);

    do {
	int xchgd;
#if defined(AO_HAVE_double_compare_and_swap)
	xchgd = AO_double_compare_and_swap(&var->dw_mem, ao_exp, ao_new);
#elif defined(AO_HAVE_compare_double_and_swap_double)
	xchgd = AO_compare_double_and_swap_double(&var->dw_mem,
						  ao_exp.AO_val1,
						  ao_exp.AO_val2,
						  ao_new.AO_val1,
						  ao_new.AO_val2);
#endif

	if (xchgd)
	    ETHR_NDWA_RETURN_VAL_3__(1, ao_exp, exp);

#ifdef AO_HAVE_double_load
	ao_act = AO_double_load(&var->dw_mem);
#else
	ao_act = AO_double_load_acquire(&var->dw_mem);
#endif

    } while (ETHR_NDWA_AOVAL_EQ__(ao_exp, ao_act));

    ETHR_NDWA_RETURN_VAL_3__(1, ao_act, exp);
}

#endif

#if defined(AO_HAVE_double_compare_and_swap_read) || defined(AO_HAVE_compare_double_and_swap_double_read)

#if defined(ETHR_NATIVE_SU_DW_SINT_T)
#  define ETHR_HAVE_ETHR_NATIVE_SU_DW_ATOMIC_CMPXCHG_RB
#else
#  define ETHR_HAVE_ETHR_NATIVE_DW_ATOMIC_CMPXCHG_RB
#endif

static ETHR_INLINE ETHR_NDWA_RET_3_TYPE__
ETHR_NDWA_FUNC__(cmpxchg_rb)(ethr_native_dw_atomic_t *var,
			     ETHR_NDWA_VAL_ARG_TYPE__ new,
			     ETHR_NDWA_VAL_ARG_TYPE__ exp)
{
    AO_double_t ao_act, ao_new, ao_exp;

    ETHR_NDWA_VAL2AOVAL__(ao_exp, exp);
    ETHR_NDWA_VAL2AOVAL__(ao_new, new);

    do {
	int xchgd;
#if defined(AO_HAVE_double_compare_and_swap_read)
	xchgd = AO_double_compare_and_swap_read(&var->dw_mem, ao_exp, ao_new);
#elif defined(AO_HAVE_compare_double_and_swap_double_read)
	xchgd = AO_compare_double_and_swap_double_read(&var->dw_mem,
							  ao_exp.AO_val1,
							  ao_exp.AO_val2,
							  ao_new.AO_val1,
							  ao_new.AO_val2);
#endif

	if (xchgd)
	    ETHR_NDWA_RETURN_VAL_3__(1, ao_exp, exp);

#if defined(AO_HAVE_double_load_read)
	ao_act = AO_double_load_read(&var->dw_mem);
#elif defined(AO_HAVE_double_load)
	ao_act = AO_double_load(&var->dw_mem);
#else
	ao_act = AO_double_load_acquire(&var->dw_mem);
#endif

    } while (ETHR_NDWA_AOVAL_EQ__(ao_exp, ao_act));

#ifndef AO_HAVE_double_load_read
#ifdef AO_HAVE_nop_read
    AO_nop_read();
#else
    AO_nop_full();
#endif
#endif

    ETHR_NDWA_RETURN_VAL_3__(1, ao_act, exp);
}

#endif

#if defined(AO_HAVE_double_compare_and_swap_acquire) || defined(AO_HAVE_compare_double_and_swap_double_acquire)

#if defined(ETHR_NATIVE_SU_DW_SINT_T)
#  define ETHR_HAVE_ETHR_NATIVE_SU_DW_ATOMIC_CMPXCHG_ACQB
#else
#  define ETHR_HAVE_ETHR_NATIVE_DW_ATOMIC_CMPXCHG_ACQB
#endif

static ETHR_INLINE ETHR_NDWA_RET_3_TYPE__
ETHR_NDWA_FUNC__(cmpxchg_acqb)(ethr_native_dw_atomic_t *var,
			       ETHR_NDWA_VAL_ARG_TYPE__ new,
			       ETHR_NDWA_VAL_ARG_TYPE__ exp)
{
    AO_double_t ao_act, ao_new, ao_exp;

    ETHR_NDWA_VAL2AOVAL__(ao_exp, exp);
    ETHR_NDWA_VAL2AOVAL__(ao_new, new);

    do {
	int xchgd;
#if defined(AO_HAVE_double_compare_and_swap_acquire)
	xchgd = AO_double_compare_and_swap_acquire(&var->dw_mem, ao_exp, ao_new);
#elif defined(AO_HAVE_compare_double_and_swap_double_acquire)
	xchgd = AO_compare_double_and_swap_double_acquire(&var->dw_mem,
							  ao_exp.AO_val1,
							  ao_exp.AO_val2,
							  ao_new.AO_val1,
							  ao_new.AO_val2);
#endif

	if (xchgd)
	    ETHR_NDWA_RETURN_VAL_3__(1, ao_exp, exp);

#ifdef AO_HAVE_double_load_acquire
	ao_act = AO_double_load_acquire(&var->dw_mem);
#else
	ao_act = AO_double_load(&var->dw_mem);
#endif

    } while (ETHR_NDWA_AOVAL_EQ__(ao_exp, ao_act));

#ifndef AO_HAVE_double_load_acquire
    AO_nop_full();
#endif

    ETHR_NDWA_RETURN_VAL_3__(1, ao_act, exp);
}

#endif

#if defined(AO_HAVE_double_compare_and_swap_write) || defined(AO_HAVE_compare_double_and_swap_double_write)

#if defined(ETHR_NATIVE_SU_DW_SINT_T)
#  define ETHR_HAVE_ETHR_NATIVE_SU_DW_ATOMIC_CMPXCHG_WB
#else
#  define ETHR_HAVE_ETHR_NATIVE_DW_ATOMIC_CMPXCHG_WB
#endif

static ETHR_INLINE ETHR_NDWA_RET_3_TYPE__
ETHR_NDWA_FUNC__(cmpxchg_wb)(ethr_native_dw_atomic_t *var,
			     ETHR_NDWA_VAL_ARG_TYPE__ new,
			     ETHR_NDWA_VAL_ARG_TYPE__ exp)
{
    AO_double_t ao_act, ao_new, ao_exp;

    ETHR_NDWA_VAL2AOVAL__(ao_exp, exp);
    ETHR_NDWA_VAL2AOVAL__(ao_new, new);

    do {
	int xchgd;
#if defined(AO_HAVE_double_compare_and_swap_write)
	xchgd = AO_double_compare_and_swap_write(&var->dw_mem, ao_exp, ao_new);
#elif defined(AO_HAVE_compare_double_and_swap_double_write)
	xchgd = AO_compare_double_and_swap_double_write(&var->dw_mem,
							ao_exp.AO_val1,
							ao_exp.AO_val2,
							ao_new.AO_val1,
							ao_new.AO_val2);
#endif

	if (xchgd)
	    ETHR_NDWA_RETURN_VAL_3__(1, ao_exp, exp);

#ifdef AO_HAVE_double_load
	ao_act = AO_double_load(&var->dw_mem);
#else
	ao_act = AO_double_load_acquire(&var->dw_mem);
#endif

    } while (ETHR_NDWA_AOVAL_EQ__(ao_exp, ao_act));

    ETHR_NDWA_RETURN_VAL_3__(1, ao_act, exp);
}

#endif

#if defined(AO_HAVE_double_compare_and_swap_release) || defined(AO_HAVE_compare_double_and_swap_double_release)

#if defined(ETHR_NATIVE_SU_DW_SINT_T)
#  define ETHR_HAVE_ETHR_NATIVE_SU_DW_ATOMIC_CMPXCHG_RELB
#else
#  define ETHR_HAVE_ETHR_NATIVE_DW_ATOMIC_CMPXCHG_RELB
#endif

static ETHR_INLINE ETHR_NDWA_RET_3_TYPE__
ETHR_NDWA_FUNC__(cmpxchg_relb)(ethr_native_dw_atomic_t *var,
			       ETHR_NDWA_VAL_ARG_TYPE__ new,
			       ETHR_NDWA_VAL_ARG_TYPE__ exp)
{
    AO_double_t ao_act, ao_new, ao_exp;

    ETHR_NDWA_VAL2AOVAL__(ao_exp, exp);
    ETHR_NDWA_VAL2AOVAL__(ao_new, new);

    do {
	int xchgd;
#if defined(AO_HAVE_double_compare_and_swap_release)
	xchgd = AO_double_compare_and_swap_release(&var->dw_mem, ao_exp, ao_new);
#elif defined(AO_HAVE_compare_double_and_swap_double_release)
	xchgd = AO_compare_double_and_swap_double_release(&var->dw_mem,
							  ao_exp.AO_val1,
							  ao_exp.AO_val2,
							  ao_new.AO_val1,
							  ao_new.AO_val2);
#endif

	if (xchgd)
	    ETHR_NDWA_RETURN_VAL_3__(1, ao_exp, exp);

	ao_act = AO_double_load(&var->dw_mem);

    } while (ETHR_NDWA_AOVAL_EQ__(ao_exp, ao_act));

    ETHR_NDWA_RETURN_VAL_3__(1, ao_act, exp);
}

#endif

#endif /* defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_ATOMIC_IMPL__) */

#endif /* Have AO double functionality ... */

#endif /* ETHR_LIBATOMIC_OPS_DW_ATOMIC_H__ */