forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathNG2memcpy.S
594 lines (543 loc) · 15.2 KB
/
NG2memcpy.S
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
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
/* SPDX-License-Identifier: GPL-2.0 */
/* NG2memcpy.S: Niagara-2 optimized memcpy.
*
* Copyright (C) 2007 David S. Miller ([email protected])
*/
#ifdef __KERNEL__
#include <linux/linkage.h>
#include <asm/visasm.h>
#include <asm/asi.h>
#define GLOBAL_SPARE %g7
#else
#define ASI_PNF 0x82
#define ASI_BLK_P 0xf0
#define ASI_BLK_INIT_QUAD_LDD_P 0xe2
#define FPRS_FEF 0x04
#ifdef MEMCPY_DEBUG
#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs; \
clr %g1; clr %g2; clr %g3; clr %g5; subcc %g0, %g0, %g0;
#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs
#else
#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs
#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs
#endif
#define GLOBAL_SPARE %g5
#endif
#ifndef STORE_ASI
#ifndef SIMULATE_NIAGARA_ON_NON_NIAGARA
#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_P
#else
#define STORE_ASI 0x80 /* ASI_P */
#endif
#endif
#ifndef EX_LD
#define EX_LD(x,y) x
#endif
#ifndef EX_LD_FP
#define EX_LD_FP(x,y) x
#endif
#ifndef EX_ST
#define EX_ST(x,y) x
#endif
#ifndef EX_ST_FP
#define EX_ST_FP(x,y) x
#endif
#ifndef LOAD
#define LOAD(type,addr,dest) type [addr], dest
#endif
#ifndef LOAD_BLK
#define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_P, dest
#endif
#ifndef STORE
#ifndef MEMCPY_DEBUG
#define STORE(type,src,addr) type src, [addr]
#else
#define STORE(type,src,addr) type##a src, [addr] 0x80
#endif
#endif
#ifndef STORE_BLK
#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_P
#endif
#ifndef STORE_INIT
#define STORE_INIT(src,addr) stxa src, [addr] STORE_ASI
#endif
#ifndef FUNC_NAME
#define FUNC_NAME NG2memcpy
#endif
#ifndef PREAMBLE
#define PREAMBLE
#endif
#ifndef XCC
#define XCC xcc
#endif
#define FREG_FROB(x0, x1, x2, x3, x4, x5, x6, x7, x8) \
faligndata %x0, %x1, %f0; \
faligndata %x1, %x2, %f2; \
faligndata %x2, %x3, %f4; \
faligndata %x3, %x4, %f6; \
faligndata %x4, %x5, %f8; \
faligndata %x5, %x6, %f10; \
faligndata %x6, %x7, %f12; \
faligndata %x7, %x8, %f14;
#define FREG_MOVE_1(x0) \
fsrc2 %x0, %f0;
#define FREG_MOVE_2(x0, x1) \
fsrc2 %x0, %f0; \
fsrc2 %x1, %f2;
#define FREG_MOVE_3(x0, x1, x2) \
fsrc2 %x0, %f0; \
fsrc2 %x1, %f2; \
fsrc2 %x2, %f4;
#define FREG_MOVE_4(x0, x1, x2, x3) \
fsrc2 %x0, %f0; \
fsrc2 %x1, %f2; \
fsrc2 %x2, %f4; \
fsrc2 %x3, %f6;
#define FREG_MOVE_5(x0, x1, x2, x3, x4) \
fsrc2 %x0, %f0; \
fsrc2 %x1, %f2; \
fsrc2 %x2, %f4; \
fsrc2 %x3, %f6; \
fsrc2 %x4, %f8;
#define FREG_MOVE_6(x0, x1, x2, x3, x4, x5) \
fsrc2 %x0, %f0; \
fsrc2 %x1, %f2; \
fsrc2 %x2, %f4; \
fsrc2 %x3, %f6; \
fsrc2 %x4, %f8; \
fsrc2 %x5, %f10;
#define FREG_MOVE_7(x0, x1, x2, x3, x4, x5, x6) \
fsrc2 %x0, %f0; \
fsrc2 %x1, %f2; \
fsrc2 %x2, %f4; \
fsrc2 %x3, %f6; \
fsrc2 %x4, %f8; \
fsrc2 %x5, %f10; \
fsrc2 %x6, %f12;
#define FREG_MOVE_8(x0, x1, x2, x3, x4, x5, x6, x7) \
fsrc2 %x0, %f0; \
fsrc2 %x1, %f2; \
fsrc2 %x2, %f4; \
fsrc2 %x3, %f6; \
fsrc2 %x4, %f8; \
fsrc2 %x5, %f10; \
fsrc2 %x6, %f12; \
fsrc2 %x7, %f14;
#define FREG_LOAD_1(base, x0) \
EX_LD_FP(LOAD(ldd, base + 0x00, %x0), NG2_retl_o2_plus_g1)
#define FREG_LOAD_2(base, x0, x1) \
EX_LD_FP(LOAD(ldd, base + 0x00, %x0), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x08, %x1), NG2_retl_o2_plus_g1);
#define FREG_LOAD_3(base, x0, x1, x2) \
EX_LD_FP(LOAD(ldd, base + 0x00, %x0), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x08, %x1), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x10, %x2), NG2_retl_o2_plus_g1);
#define FREG_LOAD_4(base, x0, x1, x2, x3) \
EX_LD_FP(LOAD(ldd, base + 0x00, %x0), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x08, %x1), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x10, %x2), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x18, %x3), NG2_retl_o2_plus_g1);
#define FREG_LOAD_5(base, x0, x1, x2, x3, x4) \
EX_LD_FP(LOAD(ldd, base + 0x00, %x0), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x08, %x1), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x10, %x2), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x18, %x3), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x20, %x4), NG2_retl_o2_plus_g1);
#define FREG_LOAD_6(base, x0, x1, x2, x3, x4, x5) \
EX_LD_FP(LOAD(ldd, base + 0x00, %x0), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x08, %x1), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x10, %x2), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x18, %x3), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x20, %x4), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x28, %x5), NG2_retl_o2_plus_g1);
#define FREG_LOAD_7(base, x0, x1, x2, x3, x4, x5, x6) \
EX_LD_FP(LOAD(ldd, base + 0x00, %x0), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x08, %x1), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x10, %x2), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x18, %x3), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x20, %x4), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x28, %x5), NG2_retl_o2_plus_g1); \
EX_LD_FP(LOAD(ldd, base + 0x30, %x6), NG2_retl_o2_plus_g1);
.register %g2,#scratch
.register %g3,#scratch
.text
#ifndef EX_RETVAL
#define EX_RETVAL(x) x
__restore_fp:
VISExitHalf
__restore_asi:
retl
wr %g0, ASI_AIUS, %asi
ENTRY(NG2_retl_o2)
ba,pt %xcc, __restore_asi
mov %o2, %o0
ENDPROC(NG2_retl_o2)
ENTRY(NG2_retl_o2_plus_1)
ba,pt %xcc, __restore_asi
add %o2, 1, %o0
ENDPROC(NG2_retl_o2_plus_1)
ENTRY(NG2_retl_o2_plus_4)
ba,pt %xcc, __restore_asi
add %o2, 4, %o0
ENDPROC(NG2_retl_o2_plus_4)
ENTRY(NG2_retl_o2_plus_8)
ba,pt %xcc, __restore_asi
add %o2, 8, %o0
ENDPROC(NG2_retl_o2_plus_8)
ENTRY(NG2_retl_o2_plus_o4_plus_1)
add %o4, 1, %o4
ba,pt %xcc, __restore_asi
add %o2, %o4, %o0
ENDPROC(NG2_retl_o2_plus_o4_plus_1)
ENTRY(NG2_retl_o2_plus_o4_plus_8)
add %o4, 8, %o4
ba,pt %xcc, __restore_asi
add %o2, %o4, %o0
ENDPROC(NG2_retl_o2_plus_o4_plus_8)
ENTRY(NG2_retl_o2_plus_o4_plus_16)
add %o4, 16, %o4
ba,pt %xcc, __restore_asi
add %o2, %o4, %o0
ENDPROC(NG2_retl_o2_plus_o4_plus_16)
ENTRY(NG2_retl_o2_plus_g1_fp)
ba,pt %xcc, __restore_fp
add %o2, %g1, %o0
ENDPROC(NG2_retl_o2_plus_g1_fp)
ENTRY(NG2_retl_o2_plus_g1_plus_64_fp)
add %g1, 64, %g1
ba,pt %xcc, __restore_fp
add %o2, %g1, %o0
ENDPROC(NG2_retl_o2_plus_g1_plus_64_fp)
ENTRY(NG2_retl_o2_plus_g1_plus_1)
add %g1, 1, %g1
ba,pt %xcc, __restore_asi
add %o2, %g1, %o0
ENDPROC(NG2_retl_o2_plus_g1_plus_1)
ENTRY(NG2_retl_o2_and_7_plus_o4)
and %o2, 7, %o2
ba,pt %xcc, __restore_asi
add %o2, %o4, %o0
ENDPROC(NG2_retl_o2_and_7_plus_o4)
ENTRY(NG2_retl_o2_and_7_plus_o4_plus_8)
and %o2, 7, %o2
add %o4, 8, %o4
ba,pt %xcc, __restore_asi
add %o2, %o4, %o0
ENDPROC(NG2_retl_o2_and_7_plus_o4_plus_8)
#endif
.align 64
.globl FUNC_NAME
.type FUNC_NAME,#function
FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */
srlx %o2, 31, %g2
cmp %g2, 0
tne %xcc, 5
PREAMBLE
mov %o0, %o3
cmp %o2, 0
be,pn %XCC, 85f
or %o0, %o1, GLOBAL_SPARE
cmp %o2, 16
blu,a,pn %XCC, 80f
or GLOBAL_SPARE, %o2, GLOBAL_SPARE
/* 2 blocks (128 bytes) is the minimum we can do the block
* copy with. We need to ensure that we'll iterate at least
* once in the block copy loop. At worst we'll need to align
* the destination to a 64-byte boundary which can chew up
* to (64 - 1) bytes from the length before we perform the
* block copy loop.
*
* However, the cut-off point, performance wise, is around
* 4 64-byte blocks.
*/
cmp %o2, (4 * 64)
blu,pt %XCC, 75f
andcc GLOBAL_SPARE, 0x7, %g0
/* %o0: dst
* %o1: src
* %o2: len (known to be >= 128)
*
* The block copy loops can use %o4, %g2, %g3 as
* temporaries while copying the data. %o5 must
* be preserved between VISEntryHalf and VISExitHalf
*/
LOAD(prefetch, %o1 + 0x000, #one_read)
LOAD(prefetch, %o1 + 0x040, #one_read)
LOAD(prefetch, %o1 + 0x080, #one_read)
/* Align destination on 64-byte boundary. */
andcc %o0, (64 - 1), %o4
be,pt %XCC, 2f
sub %o4, 64, %o4
sub %g0, %o4, %o4 ! bytes to align dst
sub %o2, %o4, %o2
1: subcc %o4, 1, %o4
EX_LD(LOAD(ldub, %o1, %g1), NG2_retl_o2_plus_o4_plus_1)
EX_ST(STORE(stb, %g1, %o0), NG2_retl_o2_plus_o4_plus_1)
add %o1, 1, %o1
bne,pt %XCC, 1b
add %o0, 1, %o0
2:
/* Clobbers o5/g1/g2/g3/g7/icc/xcc. We must preserve
* o5 from here until we hit VISExitHalf.
*/
VISEntryHalf
membar #Sync
alignaddr %o1, %g0, %g0
add %o1, (64 - 1), %o4
andn %o4, (64 - 1), %o4
andn %o2, (64 - 1), %g1
sub %o2, %g1, %o2
and %o1, (64 - 1), %g2
add %o1, %g1, %o1
sub %o0, %o4, %g3
brz,pt %g2, 190f
cmp %g2, 32
blu,a 5f
cmp %g2, 16
cmp %g2, 48
blu,a 4f
cmp %g2, 40
cmp %g2, 56
blu 170f
nop
ba,a,pt %xcc, 180f
nop
4: /* 32 <= low bits < 48 */
blu 150f
nop
ba,a,pt %xcc, 160f
nop
5: /* 0 < low bits < 32 */
blu,a 6f
cmp %g2, 8
cmp %g2, 24
blu 130f
nop
ba,a,pt %xcc, 140f
nop
6: /* 0 < low bits < 16 */
bgeu 120f
nop
/* fall through for 0 < low bits < 8 */
110: sub %o4, 64, %g2
EX_LD_FP(LOAD_BLK(%g2, %f0), NG2_retl_o2_plus_g1)
1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), NG2_retl_o2_plus_g1)
EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl_o2_plus_g1)
FREG_FROB(f0, f2, f4, f6, f8, f10, f12, f14, f16)
EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG2_retl_o2_plus_g1)
FREG_MOVE_8(f16, f18, f20, f22, f24, f26, f28, f30)
subcc %g1, 64, %g1
add %o4, 64, %o4
bne,pt %xcc, 1b
LOAD(prefetch, %o4 + 64, #one_read)
ba,pt %xcc, 195f
nop
120: sub %o4, 56, %g2
FREG_LOAD_7(%g2, f0, f2, f4, f6, f8, f10, f12)
1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), NG2_retl_o2_plus_g1)
EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl_o2_plus_g1)
FREG_FROB(f0, f2, f4, f6, f8, f10, f12, f16, f18)
EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG2_retl_o2_plus_g1)
FREG_MOVE_7(f18, f20, f22, f24, f26, f28, f30)
subcc %g1, 64, %g1
add %o4, 64, %o4
bne,pt %xcc, 1b
LOAD(prefetch, %o4 + 64, #one_read)
ba,pt %xcc, 195f
nop
130: sub %o4, 48, %g2
FREG_LOAD_6(%g2, f0, f2, f4, f6, f8, f10)
1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), NG2_retl_o2_plus_g1)
EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl_o2_plus_g1)
FREG_FROB(f0, f2, f4, f6, f8, f10, f16, f18, f20)
EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG2_retl_o2_plus_g1)
FREG_MOVE_6(f20, f22, f24, f26, f28, f30)
subcc %g1, 64, %g1
add %o4, 64, %o4
bne,pt %xcc, 1b
LOAD(prefetch, %o4 + 64, #one_read)
ba,pt %xcc, 195f
nop
140: sub %o4, 40, %g2
FREG_LOAD_5(%g2, f0, f2, f4, f6, f8)
1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), NG2_retl_o2_plus_g1)
EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl_o2_plus_g1)
FREG_FROB(f0, f2, f4, f6, f8, f16, f18, f20, f22)
EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG2_retl_o2_plus_g1)
FREG_MOVE_5(f22, f24, f26, f28, f30)
subcc %g1, 64, %g1
add %o4, 64, %o4
bne,pt %xcc, 1b
LOAD(prefetch, %o4 + 64, #one_read)
ba,pt %xcc, 195f
nop
150: sub %o4, 32, %g2
FREG_LOAD_4(%g2, f0, f2, f4, f6)
1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), NG2_retl_o2_plus_g1)
EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl_o2_plus_g1)
FREG_FROB(f0, f2, f4, f6, f16, f18, f20, f22, f24)
EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG2_retl_o2_plus_g1)
FREG_MOVE_4(f24, f26, f28, f30)
subcc %g1, 64, %g1
add %o4, 64, %o4
bne,pt %xcc, 1b
LOAD(prefetch, %o4 + 64, #one_read)
ba,pt %xcc, 195f
nop
160: sub %o4, 24, %g2
FREG_LOAD_3(%g2, f0, f2, f4)
1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), NG2_retl_o2_plus_g1)
EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl_o2_plus_g1)
FREG_FROB(f0, f2, f4, f16, f18, f20, f22, f24, f26)
EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG2_retl_o2_plus_g1)
FREG_MOVE_3(f26, f28, f30)
subcc %g1, 64, %g1
add %o4, 64, %o4
bne,pt %xcc, 1b
LOAD(prefetch, %o4 + 64, #one_read)
ba,pt %xcc, 195f
nop
170: sub %o4, 16, %g2
FREG_LOAD_2(%g2, f0, f2)
1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), NG2_retl_o2_plus_g1)
EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl_o2_plus_g1)
FREG_FROB(f0, f2, f16, f18, f20, f22, f24, f26, f28)
EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG2_retl_o2_plus_g1)
FREG_MOVE_2(f28, f30)
subcc %g1, 64, %g1
add %o4, 64, %o4
bne,pt %xcc, 1b
LOAD(prefetch, %o4 + 64, #one_read)
ba,pt %xcc, 195f
nop
180: sub %o4, 8, %g2
FREG_LOAD_1(%g2, f0)
1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), NG2_retl_o2_plus_g1)
EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl_o2_plus_g1)
FREG_FROB(f0, f16, f18, f20, f22, f24, f26, f28, f30)
EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG2_retl_o2_plus_g1)
FREG_MOVE_1(f30)
subcc %g1, 64, %g1
add %o4, 64, %o4
bne,pt %xcc, 1b
LOAD(prefetch, %o4 + 64, #one_read)
ba,pt %xcc, 195f
nop
190:
1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), NG2_retl_o2_plus_g1)
subcc %g1, 64, %g1
EX_LD_FP(LOAD_BLK(%o4, %f0), NG2_retl_o2_plus_g1_plus_64)
EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG2_retl_o2_plus_g1_plus_64)
add %o4, 64, %o4
bne,pt %xcc, 1b
LOAD(prefetch, %o4 + 64, #one_read)
195:
add %o4, %g3, %o0
membar #Sync
VISExitHalf
/* %o2 contains any final bytes still needed to be copied
* over. If anything is left, we copy it one byte at a time.
*/
brz,pt %o2, 85f
sub %o0, %o1, GLOBAL_SPARE
ba,a,pt %XCC, 90f
nop
.align 64
75: /* 16 < len <= 64 */
bne,pn %XCC, 75f
sub %o0, %o1, GLOBAL_SPARE
72:
andn %o2, 0xf, %o4
and %o2, 0xf, %o2
1: subcc %o4, 0x10, %o4
EX_LD(LOAD(ldx, %o1, %o5), NG2_retl_o2_plus_o4_plus_16)
add %o1, 0x08, %o1
EX_LD(LOAD(ldx, %o1, %g1), NG2_retl_o2_plus_o4_plus_16)
sub %o1, 0x08, %o1
EX_ST(STORE(stx, %o5, %o1 + GLOBAL_SPARE), NG2_retl_o2_plus_o4_plus_16)
add %o1, 0x8, %o1
EX_ST(STORE(stx, %g1, %o1 + GLOBAL_SPARE), NG2_retl_o2_plus_o4_plus_8)
bgu,pt %XCC, 1b
add %o1, 0x8, %o1
73: andcc %o2, 0x8, %g0
be,pt %XCC, 1f
nop
sub %o2, 0x8, %o2
EX_LD(LOAD(ldx, %o1, %o5), NG2_retl_o2_plus_8)
EX_ST(STORE(stx, %o5, %o1 + GLOBAL_SPARE), NG2_retl_o2_plus_8)
add %o1, 0x8, %o1
1: andcc %o2, 0x4, %g0
be,pt %XCC, 1f
nop
sub %o2, 0x4, %o2
EX_LD(LOAD(lduw, %o1, %o5), NG2_retl_o2_plus_4)
EX_ST(STORE(stw, %o5, %o1 + GLOBAL_SPARE), NG2_retl_o2_plus_4)
add %o1, 0x4, %o1
1: cmp %o2, 0
be,pt %XCC, 85f
nop
ba,pt %xcc, 90f
nop
75:
andcc %o0, 0x7, %g1
sub %g1, 0x8, %g1
be,pn %icc, 2f
sub %g0, %g1, %g1
sub %o2, %g1, %o2
1: subcc %g1, 1, %g1
EX_LD(LOAD(ldub, %o1, %o5), NG2_retl_o2_plus_g1_plus_1)
EX_ST(STORE(stb, %o5, %o1 + GLOBAL_SPARE), NG2_retl_o2_plus_g1_plus_1)
bgu,pt %icc, 1b
add %o1, 1, %o1
2: add %o1, GLOBAL_SPARE, %o0
andcc %o1, 0x7, %g1
bne,pt %icc, 8f
sll %g1, 3, %g1
cmp %o2, 16
bgeu,pt %icc, 72b
nop
ba,a,pt %xcc, 73b
8: mov 64, GLOBAL_SPARE
andn %o1, 0x7, %o1
EX_LD(LOAD(ldx, %o1, %g2), NG2_retl_o2)
sub GLOBAL_SPARE, %g1, GLOBAL_SPARE
andn %o2, 0x7, %o4
sllx %g2, %g1, %g2
1: add %o1, 0x8, %o1
EX_LD(LOAD(ldx, %o1, %g3), NG2_retl_o2_and_7_plus_o4)
subcc %o4, 0x8, %o4
srlx %g3, GLOBAL_SPARE, %o5
or %o5, %g2, %o5
EX_ST(STORE(stx, %o5, %o0), NG2_retl_o2_and_7_plus_o4_plus_8)
add %o0, 0x8, %o0
bgu,pt %icc, 1b
sllx %g3, %g1, %g2
srl %g1, 3, %g1
andcc %o2, 0x7, %o2
be,pn %icc, 85f
add %o1, %g1, %o1
ba,pt %xcc, 90f
sub %o0, %o1, GLOBAL_SPARE
.align 64
80: /* 0 < len <= 16 */
andcc GLOBAL_SPARE, 0x3, %g0
bne,pn %XCC, 90f
sub %o0, %o1, GLOBAL_SPARE
1:
subcc %o2, 4, %o2
EX_LD(LOAD(lduw, %o1, %g1), NG2_retl_o2_plus_4)
EX_ST(STORE(stw, %g1, %o1 + GLOBAL_SPARE), NG2_retl_o2_plus_4)
bgu,pt %XCC, 1b
add %o1, 4, %o1
85: retl
mov EX_RETVAL(%o3), %o0
.align 32
90:
subcc %o2, 1, %o2
EX_LD(LOAD(ldub, %o1, %g1), NG2_retl_o2_plus_1)
EX_ST(STORE(stb, %g1, %o1 + GLOBAL_SPARE), NG2_retl_o2_plus_1)
bgu,pt %XCC, 90b
add %o1, 1, %o1
retl
mov EX_RETVAL(%o3), %o0
.size FUNC_NAME, .-FUNC_NAME