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1/* SPDX-License-Identifier: GPL-2.0 */
2/* NGmemcpy.S: Niagara optimized memcpy.
3 *
4 * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net)
5 */
6
7#ifdef __KERNEL__
8#include <linux/linkage.h>
9#include <asm/asi.h>
10#include <asm/thread_info.h>
11#define GLOBAL_SPARE %g7
12#define RESTORE_ASI(TMP) \
13 wr %g0, ASI_AIUS, %asi
14#else
15#define GLOBAL_SPARE %g5
16#define RESTORE_ASI(TMP) \
17 wr %g0, ASI_PNF, %asi
18#endif
19
20#ifdef __sparc_v9__
21#define SAVE_AMOUNT 128
22#else
23#define SAVE_AMOUNT 64
24#endif
25
26#ifndef STORE_ASI
27#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_P
28#endif
29
30#ifndef EX_LD
31#define EX_LD(x,y) x
32#endif
33
34#ifndef EX_ST
35#define EX_ST(x,y) x
36#endif
37
38#ifndef LOAD
39#ifndef MEMCPY_DEBUG
40#define LOAD(type,addr,dest) type [addr], dest
41#else
42#define LOAD(type,addr,dest) type##a [addr] 0x80, dest
43#endif
44#endif
45
46#ifndef LOAD_TWIN
47#define LOAD_TWIN(addr_reg,dest0,dest1) \
48 ldda [addr_reg] ASI_BLK_INIT_QUAD_LDD_P, dest0
49#endif
50
51#ifndef STORE
52#define STORE(type,src,addr) type src, [addr]
53#endif
54
55#ifndef STORE_INIT
56#ifndef SIMULATE_NIAGARA_ON_NON_NIAGARA
57#define STORE_INIT(src,addr) stxa src, [addr] %asi
58#else
59#define STORE_INIT(src,addr) stx src, [addr + 0x00]
60#endif
61#endif
62
63#ifndef FUNC_NAME
64#define FUNC_NAME NGmemcpy
65#endif
66
67#ifndef PREAMBLE
68#define PREAMBLE
69#endif
70
71#ifndef XCC
72#define XCC xcc
73#endif
74
75 .register %g2,#scratch
76 .register %g3,#scratch
77
78 .text
79#ifndef EX_RETVAL
80#define EX_RETVAL(x) x
81__restore_asi:
82 ret
83 wr %g0, ASI_AIUS, %asi
84 restore
85ENTRY(NG_ret_i2_plus_i4_plus_1)
86 ba,pt %xcc, __restore_asi
87 add %i2, %i5, %i0
88ENDPROC(NG_ret_i2_plus_i4_plus_1)
89ENTRY(NG_ret_i2_plus_g1)
90 ba,pt %xcc, __restore_asi
91 add %i2, %g1, %i0
92ENDPROC(NG_ret_i2_plus_g1)
93ENTRY(NG_ret_i2_plus_g1_minus_8)
94 sub %g1, 8, %g1
95 ba,pt %xcc, __restore_asi
96 add %i2, %g1, %i0
97ENDPROC(NG_ret_i2_plus_g1_minus_8)
98ENTRY(NG_ret_i2_plus_g1_minus_16)
99 sub %g1, 16, %g1
100 ba,pt %xcc, __restore_asi
101 add %i2, %g1, %i0
102ENDPROC(NG_ret_i2_plus_g1_minus_16)
103ENTRY(NG_ret_i2_plus_g1_minus_24)
104 sub %g1, 24, %g1
105 ba,pt %xcc, __restore_asi
106 add %i2, %g1, %i0
107ENDPROC(NG_ret_i2_plus_g1_minus_24)
108ENTRY(NG_ret_i2_plus_g1_minus_32)
109 sub %g1, 32, %g1
110 ba,pt %xcc, __restore_asi
111 add %i2, %g1, %i0
112ENDPROC(NG_ret_i2_plus_g1_minus_32)
113ENTRY(NG_ret_i2_plus_g1_minus_40)
114 sub %g1, 40, %g1
115 ba,pt %xcc, __restore_asi
116 add %i2, %g1, %i0
117ENDPROC(NG_ret_i2_plus_g1_minus_40)
118ENTRY(NG_ret_i2_plus_g1_minus_48)
119 sub %g1, 48, %g1
120 ba,pt %xcc, __restore_asi
121 add %i2, %g1, %i0
122ENDPROC(NG_ret_i2_plus_g1_minus_48)
123ENTRY(NG_ret_i2_plus_g1_minus_56)
124 sub %g1, 56, %g1
125 ba,pt %xcc, __restore_asi
126 add %i2, %g1, %i0
127ENDPROC(NG_ret_i2_plus_g1_minus_56)
128ENTRY(NG_ret_i2_plus_i4)
129 ba,pt %xcc, __restore_asi
130 add %i2, %i4, %i0
131ENDPROC(NG_ret_i2_plus_i4)
132ENTRY(NG_ret_i2_plus_i4_minus_8)
133 sub %i4, 8, %i4
134 ba,pt %xcc, __restore_asi
135 add %i2, %i4, %i0
136ENDPROC(NG_ret_i2_plus_i4_minus_8)
137ENTRY(NG_ret_i2_plus_8)
138 ba,pt %xcc, __restore_asi
139 add %i2, 8, %i0
140ENDPROC(NG_ret_i2_plus_8)
141ENTRY(NG_ret_i2_plus_4)
142 ba,pt %xcc, __restore_asi
143 add %i2, 4, %i0
144ENDPROC(NG_ret_i2_plus_4)
145ENTRY(NG_ret_i2_plus_1)
146 ba,pt %xcc, __restore_asi
147 add %i2, 1, %i0
148ENDPROC(NG_ret_i2_plus_1)
149ENTRY(NG_ret_i2_plus_g1_plus_1)
150 add %g1, 1, %g1
151 ba,pt %xcc, __restore_asi
152 add %i2, %g1, %i0
153ENDPROC(NG_ret_i2_plus_g1_plus_1)
154ENTRY(NG_ret_i2)
155 ba,pt %xcc, __restore_asi
156 mov %i2, %i0
157ENDPROC(NG_ret_i2)
158ENTRY(NG_ret_i2_and_7_plus_i4)
159 and %i2, 7, %i2
160 ba,pt %xcc, __restore_asi
161 add %i2, %i4, %i0
162ENDPROC(NG_ret_i2_and_7_plus_i4)
163#endif
164
165 .align 64
166
167 .globl FUNC_NAME
168 .type FUNC_NAME,#function
169FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */
170 PREAMBLE
171 save %sp, -SAVE_AMOUNT, %sp
172 srlx %i2, 31, %g2
173 cmp %g2, 0
174 tne %xcc, 5
175 mov %i0, %o0
176 cmp %i2, 0
177 be,pn %XCC, 85f
178 or %o0, %i1, %i3
179 cmp %i2, 16
180 blu,a,pn %XCC, 80f
181 or %i3, %i2, %i3
182
183 /* 2 blocks (128 bytes) is the minimum we can do the block
184 * copy with. We need to ensure that we'll iterate at least
185 * once in the block copy loop. At worst we'll need to align
186 * the destination to a 64-byte boundary which can chew up
187 * to (64 - 1) bytes from the length before we perform the
188 * block copy loop.
189 */
190 cmp %i2, (2 * 64)
191 blu,pt %XCC, 70f
192 andcc %i3, 0x7, %g0
193
194 /* %o0: dst
195 * %i1: src
196 * %i2: len (known to be >= 128)
197 *
198 * The block copy loops will use %i4/%i5,%g2/%g3 as
199 * temporaries while copying the data.
200 */
201
202 LOAD(prefetch, %i1, #one_read)
203 wr %g0, STORE_ASI, %asi
204
205 /* Align destination on 64-byte boundary. */
206 andcc %o0, (64 - 1), %i4
207 be,pt %XCC, 2f
208 sub %i4, 64, %i4
209 sub %g0, %i4, %i4 ! bytes to align dst
210 sub %i2, %i4, %i2
2111: subcc %i4, 1, %i4
212 EX_LD(LOAD(ldub, %i1, %g1), NG_ret_i2_plus_i4_plus_1)
213 EX_ST(STORE(stb, %g1, %o0), NG_ret_i2_plus_i4_plus_1)
214 add %i1, 1, %i1
215 bne,pt %XCC, 1b
216 add %o0, 1, %o0
217
218 /* If the source is on a 16-byte boundary we can do
219 * the direct block copy loop. If it is 8-byte aligned
220 * we can do the 16-byte loads offset by -8 bytes and the
221 * init stores offset by one register.
222 *
223 * If the source is not even 8-byte aligned, we need to do
224 * shifting and masking (basically integer faligndata).
225 *
226 * The careful bit with init stores is that if we store
227 * to any part of the cache line we have to store the whole
228 * cacheline else we can end up with corrupt L2 cache line
229 * contents. Since the loop works on 64-bytes of 64-byte
230 * aligned store data at a time, this is easy to ensure.
231 */
2322:
233 andcc %i1, (16 - 1), %i4
234 andn %i2, (64 - 1), %g1 ! block copy loop iterator
235 be,pt %XCC, 50f
236 sub %i2, %g1, %i2 ! final sub-block copy bytes
237
238 cmp %i4, 8
239 be,pt %XCC, 10f
240 sub %i1, %i4, %i1
241
242 /* Neither 8-byte nor 16-byte aligned, shift and mask. */
243 and %i4, 0x7, GLOBAL_SPARE
244 sll GLOBAL_SPARE, 3, GLOBAL_SPARE
245 mov 64, %i5
246 EX_LD(LOAD_TWIN(%i1, %g2, %g3), NG_ret_i2_plus_g1)
247 sub %i5, GLOBAL_SPARE, %i5
248 mov 16, %o4
249 mov 32, %o5
250 mov 48, %o7
251 mov 64, %i3
252
253 bg,pn %XCC, 9f
254 nop
255
256#define MIX_THREE_WORDS(WORD1, WORD2, WORD3, PRE_SHIFT, POST_SHIFT, TMP) \
257 sllx WORD1, POST_SHIFT, WORD1; \
258 srlx WORD2, PRE_SHIFT, TMP; \
259 sllx WORD2, POST_SHIFT, WORD2; \
260 or WORD1, TMP, WORD1; \
261 srlx WORD3, PRE_SHIFT, TMP; \
262 or WORD2, TMP, WORD2;
263
2648: EX_LD(LOAD_TWIN(%i1 + %o4, %o2, %o3), NG_ret_i2_plus_g1)
265 MIX_THREE_WORDS(%g2, %g3, %o2, %i5, GLOBAL_SPARE, %o1)
266 LOAD(prefetch, %i1 + %i3, #one_read)
267
268 EX_ST(STORE_INIT(%g2, %o0 + 0x00), NG_ret_i2_plus_g1)
269 EX_ST(STORE_INIT(%g3, %o0 + 0x08), NG_ret_i2_plus_g1_minus_8)
270
271 EX_LD(LOAD_TWIN(%i1 + %o5, %g2, %g3), NG_ret_i2_plus_g1_minus_16)
272 MIX_THREE_WORDS(%o2, %o3, %g2, %i5, GLOBAL_SPARE, %o1)
273
274 EX_ST(STORE_INIT(%o2, %o0 + 0x10), NG_ret_i2_plus_g1_minus_16)
275 EX_ST(STORE_INIT(%o3, %o0 + 0x18), NG_ret_i2_plus_g1_minus_24)
276
277 EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3), NG_ret_i2_plus_g1_minus_32)
278 MIX_THREE_WORDS(%g2, %g3, %o2, %i5, GLOBAL_SPARE, %o1)
279
280 EX_ST(STORE_INIT(%g2, %o0 + 0x20), NG_ret_i2_plus_g1_minus_32)
281 EX_ST(STORE_INIT(%g3, %o0 + 0x28), NG_ret_i2_plus_g1_minus_40)
282
283 EX_LD(LOAD_TWIN(%i1 + %i3, %g2, %g3), NG_ret_i2_plus_g1_minus_48)
284 add %i1, 64, %i1
285 MIX_THREE_WORDS(%o2, %o3, %g2, %i5, GLOBAL_SPARE, %o1)
286
287 EX_ST(STORE_INIT(%o2, %o0 + 0x30), NG_ret_i2_plus_g1_minus_48)
288 EX_ST(STORE_INIT(%o3, %o0 + 0x38), NG_ret_i2_plus_g1_minus_56)
289
290 subcc %g1, 64, %g1
291 bne,pt %XCC, 8b
292 add %o0, 64, %o0
293
294 ba,pt %XCC, 60f
295 add %i1, %i4, %i1
296
2979: EX_LD(LOAD_TWIN(%i1 + %o4, %o2, %o3), NG_ret_i2_plus_g1)
298 MIX_THREE_WORDS(%g3, %o2, %o3, %i5, GLOBAL_SPARE, %o1)
299 LOAD(prefetch, %i1 + %i3, #one_read)
300
301 EX_ST(STORE_INIT(%g3, %o0 + 0x00), NG_ret_i2_plus_g1)
302 EX_ST(STORE_INIT(%o2, %o0 + 0x08), NG_ret_i2_plus_g1_minus_8)
303
304 EX_LD(LOAD_TWIN(%i1 + %o5, %g2, %g3), NG_ret_i2_plus_g1_minus_16)
305 MIX_THREE_WORDS(%o3, %g2, %g3, %i5, GLOBAL_SPARE, %o1)
306
307 EX_ST(STORE_INIT(%o3, %o0 + 0x10), NG_ret_i2_plus_g1_minus_16)
308 EX_ST(STORE_INIT(%g2, %o0 + 0x18), NG_ret_i2_plus_g1_minus_24)
309
310 EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3), NG_ret_i2_plus_g1_minus_32)
311 MIX_THREE_WORDS(%g3, %o2, %o3, %i5, GLOBAL_SPARE, %o1)
312
313 EX_ST(STORE_INIT(%g3, %o0 + 0x20), NG_ret_i2_plus_g1_minus_32)
314 EX_ST(STORE_INIT(%o2, %o0 + 0x28), NG_ret_i2_plus_g1_minus_40)
315
316 EX_LD(LOAD_TWIN(%i1 + %i3, %g2, %g3), NG_ret_i2_plus_g1_minus_48)
317 add %i1, 64, %i1
318 MIX_THREE_WORDS(%o3, %g2, %g3, %i5, GLOBAL_SPARE, %o1)
319
320 EX_ST(STORE_INIT(%o3, %o0 + 0x30), NG_ret_i2_plus_g1_minus_48)
321 EX_ST(STORE_INIT(%g2, %o0 + 0x38), NG_ret_i2_plus_g1_minus_56)
322
323 subcc %g1, 64, %g1
324 bne,pt %XCC, 9b
325 add %o0, 64, %o0
326
327 ba,pt %XCC, 60f
328 add %i1, %i4, %i1
329
33010: /* Destination is 64-byte aligned, source was only 8-byte
331 * aligned but it has been subtracted by 8 and we perform
332 * one twin load ahead, then add 8 back into source when
333 * we finish the loop.
334 */
335 EX_LD(LOAD_TWIN(%i1, %o4, %o5), NG_ret_i2_plus_g1)
336 mov 16, %o7
337 mov 32, %g2
338 mov 48, %g3
339 mov 64, %o1
3401: EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3), NG_ret_i2_plus_g1)
341 LOAD(prefetch, %i1 + %o1, #one_read)
342 EX_ST(STORE_INIT(%o5, %o0 + 0x00), NG_ret_i2_plus_g1) ! initializes cache line
343 EX_ST(STORE_INIT(%o2, %o0 + 0x08), NG_ret_i2_plus_g1_minus_8)
344 EX_LD(LOAD_TWIN(%i1 + %g2, %o4, %o5), NG_ret_i2_plus_g1_minus_16)
345 EX_ST(STORE_INIT(%o3, %o0 + 0x10), NG_ret_i2_plus_g1_minus_16)
346 EX_ST(STORE_INIT(%o4, %o0 + 0x18), NG_ret_i2_plus_g1_minus_24)
347 EX_LD(LOAD_TWIN(%i1 + %g3, %o2, %o3), NG_ret_i2_plus_g1_minus_32)
348 EX_ST(STORE_INIT(%o5, %o0 + 0x20), NG_ret_i2_plus_g1_minus_32)
349 EX_ST(STORE_INIT(%o2, %o0 + 0x28), NG_ret_i2_plus_g1_minus_40)
350 EX_LD(LOAD_TWIN(%i1 + %o1, %o4, %o5), NG_ret_i2_plus_g1_minus_48)
351 add %i1, 64, %i1
352 EX_ST(STORE_INIT(%o3, %o0 + 0x30), NG_ret_i2_plus_g1_minus_48)
353 EX_ST(STORE_INIT(%o4, %o0 + 0x38), NG_ret_i2_plus_g1_minus_56)
354 subcc %g1, 64, %g1
355 bne,pt %XCC, 1b
356 add %o0, 64, %o0
357
358 ba,pt %XCC, 60f
359 add %i1, 0x8, %i1
360
36150: /* Destination is 64-byte aligned, and source is 16-byte
362 * aligned.
363 */
364 mov 16, %o7
365 mov 32, %g2
366 mov 48, %g3
367 mov 64, %o1
3681: EX_LD(LOAD_TWIN(%i1 + %g0, %o4, %o5), NG_ret_i2_plus_g1)
369 EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3), NG_ret_i2_plus_g1)
370 LOAD(prefetch, %i1 + %o1, #one_read)
371 EX_ST(STORE_INIT(%o4, %o0 + 0x00), NG_ret_i2_plus_g1) ! initializes cache line
372 EX_ST(STORE_INIT(%o5, %o0 + 0x08), NG_ret_i2_plus_g1_minus_8)
373 EX_LD(LOAD_TWIN(%i1 + %g2, %o4, %o5), NG_ret_i2_plus_g1_minus_16)
374 EX_ST(STORE_INIT(%o2, %o0 + 0x10), NG_ret_i2_plus_g1_minus_16)
375 EX_ST(STORE_INIT(%o3, %o0 + 0x18), NG_ret_i2_plus_g1_minus_24)
376 EX_LD(LOAD_TWIN(%i1 + %g3, %o2, %o3), NG_ret_i2_plus_g1_minus_32)
377 add %i1, 64, %i1
378 EX_ST(STORE_INIT(%o4, %o0 + 0x20), NG_ret_i2_plus_g1_minus_32)
379 EX_ST(STORE_INIT(%o5, %o0 + 0x28), NG_ret_i2_plus_g1_minus_40)
380 EX_ST(STORE_INIT(%o2, %o0 + 0x30), NG_ret_i2_plus_g1_minus_48)
381 EX_ST(STORE_INIT(%o3, %o0 + 0x38), NG_ret_i2_plus_g1_minus_56)
382 subcc %g1, 64, %g1
383 bne,pt %XCC, 1b
384 add %o0, 64, %o0
385 /* fall through */
386
38760:
388 membar #Sync
389
390 /* %i2 contains any final bytes still needed to be copied
391 * over. If anything is left, we copy it one byte at a time.
392 */
393 RESTORE_ASI(%i3)
394 brz,pt %i2, 85f
395 sub %o0, %i1, %i3
396 ba,a,pt %XCC, 90f
397 nop
398
399 .align 64
40070: /* 16 < len <= 64 */
401 bne,pn %XCC, 75f
402 sub %o0, %i1, %i3
403
40472:
405 andn %i2, 0xf, %i4
406 and %i2, 0xf, %i2
4071: subcc %i4, 0x10, %i4
408 EX_LD(LOAD(ldx, %i1, %o4), NG_ret_i2_plus_i4)
409 add %i1, 0x08, %i1
410 EX_LD(LOAD(ldx, %i1, %g1), NG_ret_i2_plus_i4)
411 sub %i1, 0x08, %i1
412 EX_ST(STORE(stx, %o4, %i1 + %i3), NG_ret_i2_plus_i4)
413 add %i1, 0x8, %i1
414 EX_ST(STORE(stx, %g1, %i1 + %i3), NG_ret_i2_plus_i4_minus_8)
415 bgu,pt %XCC, 1b
416 add %i1, 0x8, %i1
41773: andcc %i2, 0x8, %g0
418 be,pt %XCC, 1f
419 nop
420 sub %i2, 0x8, %i2
421 EX_LD(LOAD(ldx, %i1, %o4), NG_ret_i2_plus_8)
422 EX_ST(STORE(stx, %o4, %i1 + %i3), NG_ret_i2_plus_8)
423 add %i1, 0x8, %i1
4241: andcc %i2, 0x4, %g0
425 be,pt %XCC, 1f
426 nop
427 sub %i2, 0x4, %i2
428 EX_LD(LOAD(lduw, %i1, %i5), NG_ret_i2_plus_4)
429 EX_ST(STORE(stw, %i5, %i1 + %i3), NG_ret_i2_plus_4)
430 add %i1, 0x4, %i1
4311: cmp %i2, 0
432 be,pt %XCC, 85f
433 nop
434 ba,pt %xcc, 90f
435 nop
436
43775:
438 andcc %o0, 0x7, %g1
439 sub %g1, 0x8, %g1
440 be,pn %icc, 2f
441 sub %g0, %g1, %g1
442 sub %i2, %g1, %i2
443
4441: subcc %g1, 1, %g1
445 EX_LD(LOAD(ldub, %i1, %i5), NG_ret_i2_plus_g1_plus_1)
446 EX_ST(STORE(stb, %i5, %i1 + %i3), NG_ret_i2_plus_g1_plus_1)
447 bgu,pt %icc, 1b
448 add %i1, 1, %i1
449
4502: add %i1, %i3, %o0
451 andcc %i1, 0x7, %g1
452 bne,pt %icc, 8f
453 sll %g1, 3, %g1
454
455 cmp %i2, 16
456 bgeu,pt %icc, 72b
457 nop
458 ba,a,pt %xcc, 73b
459
4608: mov 64, %i3
461 andn %i1, 0x7, %i1
462 EX_LD(LOAD(ldx, %i1, %g2), NG_ret_i2)
463 sub %i3, %g1, %i3
464 andn %i2, 0x7, %i4
465 sllx %g2, %g1, %g2
4661: add %i1, 0x8, %i1
467 EX_LD(LOAD(ldx, %i1, %g3), NG_ret_i2_and_7_plus_i4)
468 subcc %i4, 0x8, %i4
469 srlx %g3, %i3, %i5
470 or %i5, %g2, %i5
471 EX_ST(STORE(stx, %i5, %o0), NG_ret_i2_and_7_plus_i4)
472 add %o0, 0x8, %o0
473 bgu,pt %icc, 1b
474 sllx %g3, %g1, %g2
475
476 srl %g1, 3, %g1
477 andcc %i2, 0x7, %i2
478 be,pn %icc, 85f
479 add %i1, %g1, %i1
480 ba,pt %xcc, 90f
481 sub %o0, %i1, %i3
482
483 .align 64
48480: /* 0 < len <= 16 */
485 andcc %i3, 0x3, %g0
486 bne,pn %XCC, 90f
487 sub %o0, %i1, %i3
488
4891:
490 subcc %i2, 4, %i2
491 EX_LD(LOAD(lduw, %i1, %g1), NG_ret_i2_plus_4)
492 EX_ST(STORE(stw, %g1, %i1 + %i3), NG_ret_i2_plus_4)
493 bgu,pt %XCC, 1b
494 add %i1, 4, %i1
495
49685: ret
497 restore EX_RETVAL(%i0), %g0, %o0
498
499 .align 32
50090:
501 subcc %i2, 1, %i2
502 EX_LD(LOAD(ldub, %i1, %g1), NG_ret_i2_plus_1)
503 EX_ST(STORE(stb, %g1, %i1 + %i3), NG_ret_i2_plus_1)
504 bgu,pt %XCC, 90b
505 add %i1, 1, %i1
506 ret
507 restore EX_RETVAL(%i0), %g0, %o0
508
509 .size FUNC_NAME, .-FUNC_NAME
1/* NGmemcpy.S: Niagara optimized memcpy.
2 *
3 * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net)
4 */
5
6#ifdef __KERNEL__
7#include <asm/asi.h>
8#include <asm/thread_info.h>
9#define GLOBAL_SPARE %g7
10#define RESTORE_ASI(TMP) \
11 ldub [%g6 + TI_CURRENT_DS], TMP; \
12 wr TMP, 0x0, %asi;
13#else
14#define GLOBAL_SPARE %g5
15#define RESTORE_ASI(TMP) \
16 wr %g0, ASI_PNF, %asi
17#endif
18
19#ifdef __sparc_v9__
20#define SAVE_AMOUNT 128
21#else
22#define SAVE_AMOUNT 64
23#endif
24
25#ifndef STORE_ASI
26#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_P
27#endif
28
29#ifndef EX_LD
30#define EX_LD(x) x
31#endif
32
33#ifndef EX_ST
34#define EX_ST(x) x
35#endif
36
37#ifndef EX_RETVAL
38#define EX_RETVAL(x) x
39#endif
40
41#ifndef LOAD
42#ifndef MEMCPY_DEBUG
43#define LOAD(type,addr,dest) type [addr], dest
44#else
45#define LOAD(type,addr,dest) type##a [addr] 0x80, dest
46#endif
47#endif
48
49#ifndef LOAD_TWIN
50#define LOAD_TWIN(addr_reg,dest0,dest1) \
51 ldda [addr_reg] ASI_BLK_INIT_QUAD_LDD_P, dest0
52#endif
53
54#ifndef STORE
55#define STORE(type,src,addr) type src, [addr]
56#endif
57
58#ifndef STORE_INIT
59#ifndef SIMULATE_NIAGARA_ON_NON_NIAGARA
60#define STORE_INIT(src,addr) stxa src, [addr] %asi
61#else
62#define STORE_INIT(src,addr) stx src, [addr + 0x00]
63#endif
64#endif
65
66#ifndef FUNC_NAME
67#define FUNC_NAME NGmemcpy
68#endif
69
70#ifndef PREAMBLE
71#define PREAMBLE
72#endif
73
74#ifndef XCC
75#define XCC xcc
76#endif
77
78 .register %g2,#scratch
79 .register %g3,#scratch
80
81 .text
82 .align 64
83
84 .globl FUNC_NAME
85 .type FUNC_NAME,#function
86FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */
87 PREAMBLE
88 save %sp, -SAVE_AMOUNT, %sp
89 srlx %i2, 31, %g2
90 cmp %g2, 0
91 tne %xcc, 5
92 mov %i0, %o0
93 cmp %i2, 0
94 be,pn %XCC, 85f
95 or %o0, %i1, %i3
96 cmp %i2, 16
97 blu,a,pn %XCC, 80f
98 or %i3, %i2, %i3
99
100 /* 2 blocks (128 bytes) is the minimum we can do the block
101 * copy with. We need to ensure that we'll iterate at least
102 * once in the block copy loop. At worst we'll need to align
103 * the destination to a 64-byte boundary which can chew up
104 * to (64 - 1) bytes from the length before we perform the
105 * block copy loop.
106 */
107 cmp %i2, (2 * 64)
108 blu,pt %XCC, 70f
109 andcc %i3, 0x7, %g0
110
111 /* %o0: dst
112 * %i1: src
113 * %i2: len (known to be >= 128)
114 *
115 * The block copy loops will use %i4/%i5,%g2/%g3 as
116 * temporaries while copying the data.
117 */
118
119 LOAD(prefetch, %i1, #one_read)
120 wr %g0, STORE_ASI, %asi
121
122 /* Align destination on 64-byte boundary. */
123 andcc %o0, (64 - 1), %i4
124 be,pt %XCC, 2f
125 sub %i4, 64, %i4
126 sub %g0, %i4, %i4 ! bytes to align dst
127 sub %i2, %i4, %i2
1281: subcc %i4, 1, %i4
129 EX_LD(LOAD(ldub, %i1, %g1))
130 EX_ST(STORE(stb, %g1, %o0))
131 add %i1, 1, %i1
132 bne,pt %XCC, 1b
133 add %o0, 1, %o0
134
135 /* If the source is on a 16-byte boundary we can do
136 * the direct block copy loop. If it is 8-byte aligned
137 * we can do the 16-byte loads offset by -8 bytes and the
138 * init stores offset by one register.
139 *
140 * If the source is not even 8-byte aligned, we need to do
141 * shifting and masking (basically integer faligndata).
142 *
143 * The careful bit with init stores is that if we store
144 * to any part of the cache line we have to store the whole
145 * cacheline else we can end up with corrupt L2 cache line
146 * contents. Since the loop works on 64-bytes of 64-byte
147 * aligned store data at a time, this is easy to ensure.
148 */
1492:
150 andcc %i1, (16 - 1), %i4
151 andn %i2, (64 - 1), %g1 ! block copy loop iterator
152 be,pt %XCC, 50f
153 sub %i2, %g1, %i2 ! final sub-block copy bytes
154
155 cmp %i4, 8
156 be,pt %XCC, 10f
157 sub %i1, %i4, %i1
158
159 /* Neither 8-byte nor 16-byte aligned, shift and mask. */
160 and %i4, 0x7, GLOBAL_SPARE
161 sll GLOBAL_SPARE, 3, GLOBAL_SPARE
162 mov 64, %i5
163 EX_LD(LOAD_TWIN(%i1, %g2, %g3))
164 sub %i5, GLOBAL_SPARE, %i5
165 mov 16, %o4
166 mov 32, %o5
167 mov 48, %o7
168 mov 64, %i3
169
170 bg,pn %XCC, 9f
171 nop
172
173#define MIX_THREE_WORDS(WORD1, WORD2, WORD3, PRE_SHIFT, POST_SHIFT, TMP) \
174 sllx WORD1, POST_SHIFT, WORD1; \
175 srlx WORD2, PRE_SHIFT, TMP; \
176 sllx WORD2, POST_SHIFT, WORD2; \
177 or WORD1, TMP, WORD1; \
178 srlx WORD3, PRE_SHIFT, TMP; \
179 or WORD2, TMP, WORD2;
180
1818: EX_LD(LOAD_TWIN(%i1 + %o4, %o2, %o3))
182 MIX_THREE_WORDS(%g2, %g3, %o2, %i5, GLOBAL_SPARE, %o1)
183 LOAD(prefetch, %i1 + %i3, #one_read)
184
185 EX_ST(STORE_INIT(%g2, %o0 + 0x00))
186 EX_ST(STORE_INIT(%g3, %o0 + 0x08))
187
188 EX_LD(LOAD_TWIN(%i1 + %o5, %g2, %g3))
189 MIX_THREE_WORDS(%o2, %o3, %g2, %i5, GLOBAL_SPARE, %o1)
190
191 EX_ST(STORE_INIT(%o2, %o0 + 0x10))
192 EX_ST(STORE_INIT(%o3, %o0 + 0x18))
193
194 EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3))
195 MIX_THREE_WORDS(%g2, %g3, %o2, %i5, GLOBAL_SPARE, %o1)
196
197 EX_ST(STORE_INIT(%g2, %o0 + 0x20))
198 EX_ST(STORE_INIT(%g3, %o0 + 0x28))
199
200 EX_LD(LOAD_TWIN(%i1 + %i3, %g2, %g3))
201 add %i1, 64, %i1
202 MIX_THREE_WORDS(%o2, %o3, %g2, %i5, GLOBAL_SPARE, %o1)
203
204 EX_ST(STORE_INIT(%o2, %o0 + 0x30))
205 EX_ST(STORE_INIT(%o3, %o0 + 0x38))
206
207 subcc %g1, 64, %g1
208 bne,pt %XCC, 8b
209 add %o0, 64, %o0
210
211 ba,pt %XCC, 60f
212 add %i1, %i4, %i1
213
2149: EX_LD(LOAD_TWIN(%i1 + %o4, %o2, %o3))
215 MIX_THREE_WORDS(%g3, %o2, %o3, %i5, GLOBAL_SPARE, %o1)
216 LOAD(prefetch, %i1 + %i3, #one_read)
217
218 EX_ST(STORE_INIT(%g3, %o0 + 0x00))
219 EX_ST(STORE_INIT(%o2, %o0 + 0x08))
220
221 EX_LD(LOAD_TWIN(%i1 + %o5, %g2, %g3))
222 MIX_THREE_WORDS(%o3, %g2, %g3, %i5, GLOBAL_SPARE, %o1)
223
224 EX_ST(STORE_INIT(%o3, %o0 + 0x10))
225 EX_ST(STORE_INIT(%g2, %o0 + 0x18))
226
227 EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3))
228 MIX_THREE_WORDS(%g3, %o2, %o3, %i5, GLOBAL_SPARE, %o1)
229
230 EX_ST(STORE_INIT(%g3, %o0 + 0x20))
231 EX_ST(STORE_INIT(%o2, %o0 + 0x28))
232
233 EX_LD(LOAD_TWIN(%i1 + %i3, %g2, %g3))
234 add %i1, 64, %i1
235 MIX_THREE_WORDS(%o3, %g2, %g3, %i5, GLOBAL_SPARE, %o1)
236
237 EX_ST(STORE_INIT(%o3, %o0 + 0x30))
238 EX_ST(STORE_INIT(%g2, %o0 + 0x38))
239
240 subcc %g1, 64, %g1
241 bne,pt %XCC, 9b
242 add %o0, 64, %o0
243
244 ba,pt %XCC, 60f
245 add %i1, %i4, %i1
246
24710: /* Destination is 64-byte aligned, source was only 8-byte
248 * aligned but it has been subtracted by 8 and we perform
249 * one twin load ahead, then add 8 back into source when
250 * we finish the loop.
251 */
252 EX_LD(LOAD_TWIN(%i1, %o4, %o5))
253 mov 16, %o7
254 mov 32, %g2
255 mov 48, %g3
256 mov 64, %o1
2571: EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3))
258 LOAD(prefetch, %i1 + %o1, #one_read)
259 EX_ST(STORE_INIT(%o5, %o0 + 0x00)) ! initializes cache line
260 EX_ST(STORE_INIT(%o2, %o0 + 0x08))
261 EX_LD(LOAD_TWIN(%i1 + %g2, %o4, %o5))
262 EX_ST(STORE_INIT(%o3, %o0 + 0x10))
263 EX_ST(STORE_INIT(%o4, %o0 + 0x18))
264 EX_LD(LOAD_TWIN(%i1 + %g3, %o2, %o3))
265 EX_ST(STORE_INIT(%o5, %o0 + 0x20))
266 EX_ST(STORE_INIT(%o2, %o0 + 0x28))
267 EX_LD(LOAD_TWIN(%i1 + %o1, %o4, %o5))
268 add %i1, 64, %i1
269 EX_ST(STORE_INIT(%o3, %o0 + 0x30))
270 EX_ST(STORE_INIT(%o4, %o0 + 0x38))
271 subcc %g1, 64, %g1
272 bne,pt %XCC, 1b
273 add %o0, 64, %o0
274
275 ba,pt %XCC, 60f
276 add %i1, 0x8, %i1
277
27850: /* Destination is 64-byte aligned, and source is 16-byte
279 * aligned.
280 */
281 mov 16, %o7
282 mov 32, %g2
283 mov 48, %g3
284 mov 64, %o1
2851: EX_LD(LOAD_TWIN(%i1 + %g0, %o4, %o5))
286 EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3))
287 LOAD(prefetch, %i1 + %o1, #one_read)
288 EX_ST(STORE_INIT(%o4, %o0 + 0x00)) ! initializes cache line
289 EX_ST(STORE_INIT(%o5, %o0 + 0x08))
290 EX_LD(LOAD_TWIN(%i1 + %g2, %o4, %o5))
291 EX_ST(STORE_INIT(%o2, %o0 + 0x10))
292 EX_ST(STORE_INIT(%o3, %o0 + 0x18))
293 EX_LD(LOAD_TWIN(%i1 + %g3, %o2, %o3))
294 add %i1, 64, %i1
295 EX_ST(STORE_INIT(%o4, %o0 + 0x20))
296 EX_ST(STORE_INIT(%o5, %o0 + 0x28))
297 EX_ST(STORE_INIT(%o2, %o0 + 0x30))
298 EX_ST(STORE_INIT(%o3, %o0 + 0x38))
299 subcc %g1, 64, %g1
300 bne,pt %XCC, 1b
301 add %o0, 64, %o0
302 /* fall through */
303
30460:
305 membar #Sync
306
307 /* %i2 contains any final bytes still needed to be copied
308 * over. If anything is left, we copy it one byte at a time.
309 */
310 RESTORE_ASI(%i3)
311 brz,pt %i2, 85f
312 sub %o0, %i1, %i3
313 ba,a,pt %XCC, 90f
314
315 .align 64
31670: /* 16 < len <= 64 */
317 bne,pn %XCC, 75f
318 sub %o0, %i1, %i3
319
32072:
321 andn %i2, 0xf, %i4
322 and %i2, 0xf, %i2
3231: subcc %i4, 0x10, %i4
324 EX_LD(LOAD(ldx, %i1, %o4))
325 add %i1, 0x08, %i1
326 EX_LD(LOAD(ldx, %i1, %g1))
327 sub %i1, 0x08, %i1
328 EX_ST(STORE(stx, %o4, %i1 + %i3))
329 add %i1, 0x8, %i1
330 EX_ST(STORE(stx, %g1, %i1 + %i3))
331 bgu,pt %XCC, 1b
332 add %i1, 0x8, %i1
33373: andcc %i2, 0x8, %g0
334 be,pt %XCC, 1f
335 nop
336 sub %i2, 0x8, %i2
337 EX_LD(LOAD(ldx, %i1, %o4))
338 EX_ST(STORE(stx, %o4, %i1 + %i3))
339 add %i1, 0x8, %i1
3401: andcc %i2, 0x4, %g0
341 be,pt %XCC, 1f
342 nop
343 sub %i2, 0x4, %i2
344 EX_LD(LOAD(lduw, %i1, %i5))
345 EX_ST(STORE(stw, %i5, %i1 + %i3))
346 add %i1, 0x4, %i1
3471: cmp %i2, 0
348 be,pt %XCC, 85f
349 nop
350 ba,pt %xcc, 90f
351 nop
352
35375:
354 andcc %o0, 0x7, %g1
355 sub %g1, 0x8, %g1
356 be,pn %icc, 2f
357 sub %g0, %g1, %g1
358 sub %i2, %g1, %i2
359
3601: subcc %g1, 1, %g1
361 EX_LD(LOAD(ldub, %i1, %i5))
362 EX_ST(STORE(stb, %i5, %i1 + %i3))
363 bgu,pt %icc, 1b
364 add %i1, 1, %i1
365
3662: add %i1, %i3, %o0
367 andcc %i1, 0x7, %g1
368 bne,pt %icc, 8f
369 sll %g1, 3, %g1
370
371 cmp %i2, 16
372 bgeu,pt %icc, 72b
373 nop
374 ba,a,pt %xcc, 73b
375
3768: mov 64, %i3
377 andn %i1, 0x7, %i1
378 EX_LD(LOAD(ldx, %i1, %g2))
379 sub %i3, %g1, %i3
380 andn %i2, 0x7, %i4
381 sllx %g2, %g1, %g2
3821: add %i1, 0x8, %i1
383 EX_LD(LOAD(ldx, %i1, %g3))
384 subcc %i4, 0x8, %i4
385 srlx %g3, %i3, %i5
386 or %i5, %g2, %i5
387 EX_ST(STORE(stx, %i5, %o0))
388 add %o0, 0x8, %o0
389 bgu,pt %icc, 1b
390 sllx %g3, %g1, %g2
391
392 srl %g1, 3, %g1
393 andcc %i2, 0x7, %i2
394 be,pn %icc, 85f
395 add %i1, %g1, %i1
396 ba,pt %xcc, 90f
397 sub %o0, %i1, %i3
398
399 .align 64
40080: /* 0 < len <= 16 */
401 andcc %i3, 0x3, %g0
402 bne,pn %XCC, 90f
403 sub %o0, %i1, %i3
404
4051:
406 subcc %i2, 4, %i2
407 EX_LD(LOAD(lduw, %i1, %g1))
408 EX_ST(STORE(stw, %g1, %i1 + %i3))
409 bgu,pt %XCC, 1b
410 add %i1, 4, %i1
411
41285: ret
413 restore EX_RETVAL(%i0), %g0, %o0
414
415 .align 32
41690:
417 subcc %i2, 1, %i2
418 EX_LD(LOAD(ldub, %i1, %g1))
419 EX_ST(STORE(stb, %g1, %i1 + %i3))
420 bgu,pt %XCC, 90b
421 add %i1, 1, %i1
422 ret
423 restore EX_RETVAL(%i0), %g0, %o0
424
425 .size FUNC_NAME, .-FUNC_NAME