1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* U3memcpy.S: UltraSparc-III optimized memcpy
3 *
4 * Copyright (C) 1999, 2000, 2004 David S. Mil
5 */
6
7 #ifdef __KERNEL__
8 #include <linux/linkage.h>
9 #include <asm/visasm.h>
10 #include <asm/asi.h>
11 #define GLOBAL_SPARE %g7
12 #else
13 #define ASI_BLK_P 0xf0
14 #define FPRS_FEF 0x04
15 #ifdef MEMCPY_DEBUG
16 #define VISEntryHalf rd %fprs, %o5; wr %g0, FP
17 clr %g1; clr %g2; clr %g3
18 #define VISExitHalf and %o5, FPRS_FEF, %o5; wr
19 #else
20 #define VISEntryHalf rd %fprs, %o5; wr %g0, FP
21 #define VISExitHalf and %o5, FPRS_FEF, %o5; wr
22 #endif
23 #define GLOBAL_SPARE %g5
24 #endif
25
26 #ifndef EX_LD
27 #define EX_LD(x,y) x
28 #endif
29 #ifndef EX_LD_FP
30 #define EX_LD_FP(x,y) x
31 #endif
32
33 #ifndef EX_ST
34 #define EX_ST(x,y) x
35 #endif
36 #ifndef EX_ST_FP
37 #define EX_ST_FP(x,y) x
38 #endif
39
40 #ifndef LOAD
41 #define LOAD(type,addr,dest) type [addr], d
42 #endif
43
44 #ifndef STORE
45 #define STORE(type,src,addr) type src, [add
46 #endif
47
48 #ifndef STORE_BLK
49 #define STORE_BLK(src,addr) stda src, [add
50 #endif
51
52 #ifndef FUNC_NAME
53 #define FUNC_NAME U3memcpy
54 #endif
55
56 #ifndef PREAMBLE
57 #define PREAMBLE
58 #endif
59
60 #ifndef XCC
61 #define XCC xcc
62 #endif
63
64 .register %g2,#scratch
65 .register %g3,#scratch
66
67 /* Special/non-trivial issues of this
68 *
69 * 1) %o5 is preserved from VISEntryHa
70 * 2) Only low 32 FPU registers are us
71 * lower half of the FPU register s
72 * code. This is especially import
73 * 3) This code never prefetches cache
74 * of the source buffer.
75 */
76
77 .text
78 #ifndef EX_RETVAL
79 #define EX_RETVAL(x) x
80 __restore_fp:
81 VISExitHalf
82 retl
83 nop
84 ENTRY(U3_retl_o2_plus_g2_plus_g1_plus_1_fp)
85 add %g1, 1, %g1
86 add %g2, %g1, %g2
87 ba,pt %xcc, __restore_fp
88 add %o2, %g2, %o0
89 ENDPROC(U3_retl_o2_plus_g2_plus_g1_plus_1_fp)
90 ENTRY(U3_retl_o2_plus_g2_fp)
91 ba,pt %xcc, __restore_fp
92 add %o2, %g2, %o0
93 ENDPROC(U3_retl_o2_plus_g2_fp)
94 ENTRY(U3_retl_o2_plus_g2_plus_8_fp)
95 add %g2, 8, %g2
96 ba,pt %xcc, __restore_fp
97 add %o2, %g2, %o0
98 ENDPROC(U3_retl_o2_plus_g2_plus_8_fp)
99 ENTRY(U3_retl_o2)
100 retl
101 mov %o2, %o0
102 ENDPROC(U3_retl_o2)
103 ENTRY(U3_retl_o2_plus_1)
104 retl
105 add %o2, 1, %o0
106 ENDPROC(U3_retl_o2_plus_1)
107 ENTRY(U3_retl_o2_plus_4)
108 retl
109 add %o2, 4, %o0
110 ENDPROC(U3_retl_o2_plus_4)
111 ENTRY(U3_retl_o2_plus_8)
112 retl
113 add %o2, 8, %o0
114 ENDPROC(U3_retl_o2_plus_8)
115 ENTRY(U3_retl_o2_plus_g1_plus_1)
116 add %g1, 1, %g1
117 retl
118 add %o2, %g1, %o0
119 ENDPROC(U3_retl_o2_plus_g1_plus_1)
120 ENTRY(U3_retl_o2_fp)
121 ba,pt %xcc, __restore_fp
122 mov %o2, %o0
123 ENDPROC(U3_retl_o2_fp)
124 ENTRY(U3_retl_o2_plus_o3_sll_6_plus_0x80_fp)
125 sll %o3, 6, %o3
126 add %o3, 0x80, %o3
127 ba,pt %xcc, __restore_fp
128 add %o2, %o3, %o0
129 ENDPROC(U3_retl_o2_plus_o3_sll_6_plus_0x80_fp)
130 ENTRY(U3_retl_o2_plus_o3_sll_6_plus_0x40_fp)
131 sll %o3, 6, %o3
132 add %o3, 0x40, %o3
133 ba,pt %xcc, __restore_fp
134 add %o2, %o3, %o0
135 ENDPROC(U3_retl_o2_plus_o3_sll_6_plus_0x40_fp)
136 ENTRY(U3_retl_o2_plus_GS_plus_0x10)
137 add GLOBAL_SPARE, 0x10, GLOBAL_SPA
138 retl
139 add %o2, GLOBAL_SPARE, %o0
140 ENDPROC(U3_retl_o2_plus_GS_plus_0x10)
141 ENTRY(U3_retl_o2_plus_GS_plus_0x08)
142 add GLOBAL_SPARE, 0x08, GLOBAL_SPA
143 retl
144 add %o2, GLOBAL_SPARE, %o0
145 ENDPROC(U3_retl_o2_plus_GS_plus_0x08)
146 ENTRY(U3_retl_o2_and_7_plus_GS)
147 and %o2, 7, %o2
148 retl
149 add %o2, GLOBAL_SPARE, %o0
150 ENDPROC(U3_retl_o2_and_7_plus_GS)
151 ENTRY(U3_retl_o2_and_7_plus_GS_plus_8)
152 add GLOBAL_SPARE, 8, GLOBAL_SPARE
153 and %o2, 7, %o2
154 retl
155 add %o2, GLOBAL_SPARE, %o0
156 ENDPROC(U3_retl_o2_and_7_plus_GS_plus_8)
157 #endif
158
159 .align 64
160
161 /* The cheetah's flexible spine, overs
162 * slender muscular body, and claws ma
163 * in Africa and the fastest animal on
164 * of up to 2.4GB per second.
165 */
166
167 .globl FUNC_NAME
168 .type FUNC_NAME,#function
169 FUNC_NAME: /* %o0=dst, %o1=src, %o2=len *
170 srlx %o2, 31, %g2
171 cmp %g2, 0
172
173 /* software trap 5 "Range Check" if ds
174 tne %xcc, 5
175 PREAMBLE
176 mov %o0, %o4
177
178 /* if len == 0 */
179 cmp %o2, 0
180 be,pn %XCC, end_return
181 or %o0, %o1, %o3
182
183 /* if len < 16 */
184 cmp %o2, 16
185 blu,a,pn %XCC, less_than_16
186 or %o3, %o2, %o3
187
188 /* if len < 192 */
189 cmp %o2, (3 * 64)
190 blu,pt %XCC, less_than_192
191 andcc %o3, 0x7, %g0
192
193 /* Clobbers o5/g1/g2/g3/g7/icc/xcc. W
194 * o5 from here until we hit VISExitHa
195 */
196 VISEntryHalf
197
198 /* Is 'dst' already aligned on an 64-b
199 andcc %o0, 0x3f, %g2
200 be,pt %XCC, 2f
201
202 /* Compute abs((dst & 0x3f) - 0x40) in
203 * of bytes to copy to make 'dst' 64-b
204 * subtract this from 'len'.
205 */
206 sub %o0, %o1, GLOBAL_SPARE
207 sub %g2, 0x40, %g2
208 sub %g0, %g2, %g2
209 sub %o2, %g2, %o2
210 andcc %g2, 0x7, %g1
211 be,pt %icc, 2f
212 and %g2, 0x38, %g2
213
214 1: subcc %g1, 0x1, %g1
215 EX_LD_FP(LOAD(ldub, %o1 + 0x00, %o3),
216 EX_ST_FP(STORE(stb, %o3, %o1 + GLOBAL_
217 bgu,pt %XCC, 1b
218 add %o1, 0x1, %o1
219
220 add %o1, GLOBAL_SPARE, %o0
221
222 2: cmp %g2, 0x0
223 and %o1, 0x7, %g1
224 be,pt %icc, 3f
225 alignaddr %o1, %g0, %o1
226
227 EX_LD_FP(LOAD(ldd, %o1, %f4), U3_retl_
228 1: EX_LD_FP(LOAD(ldd, %o1 + 0x8, %f6), U3
229 add %o1, 0x8, %o1
230 subcc %g2, 0x8, %g2
231 faligndata %f4, %f6, %f0
232 EX_ST_FP(STORE(std, %f0, %o0), U3_retl
233 be,pn %icc, 3f
234 add %o0, 0x8, %o0
235
236 EX_LD_FP(LOAD(ldd, %o1 + 0x8, %f4), U3
237 add %o1, 0x8, %o1
238 subcc %g2, 0x8, %g2
239 faligndata %f6, %f4, %f2
240 EX_ST_FP(STORE(std, %f2, %o0), U3_retl
241 bne,pt %icc, 1b
242 add %o0, 0x8, %o0
243
244 3: LOAD(prefetch, %o1 + 0x000, #one_read)
245 LOAD(prefetch, %o1 + 0x040, #one_read)
246 andn %o2, (0x40 - 1), GLOBA
247 LOAD(prefetch, %o1 + 0x080, #one_read)
248 LOAD(prefetch, %o1 + 0x0c0, #one_read)
249 LOAD(prefetch, %o1 + 0x100, #one_read)
250 EX_LD_FP(LOAD(ldd, %o1 + 0x000, %f0),
251 LOAD(prefetch, %o1 + 0x140, #one_read)
252 EX_LD_FP(LOAD(ldd, %o1 + 0x008, %f2),
253 LOAD(prefetch, %o1 + 0x180, #one_read)
254 EX_LD_FP(LOAD(ldd, %o1 + 0x010, %f4),
255 LOAD(prefetch, %o1 + 0x1c0, #one_read)
256 faligndata %f0, %f2, %f16
257 EX_LD_FP(LOAD(ldd, %o1 + 0x018, %f6),
258 faligndata %f2, %f4, %f18
259 EX_LD_FP(LOAD(ldd, %o1 + 0x020, %f8),
260 faligndata %f4, %f6, %f20
261 EX_LD_FP(LOAD(ldd, %o1 + 0x028, %f10),
262 faligndata %f6, %f8, %f22
263
264 EX_LD_FP(LOAD(ldd, %o1 + 0x030, %f12),
265 faligndata %f8, %f10, %f24
266 EX_LD_FP(LOAD(ldd, %o1 + 0x038, %f14),
267 faligndata %f10, %f12, %f26
268 EX_LD_FP(LOAD(ldd, %o1 + 0x040, %f0),
269
270 subcc GLOBAL_SPARE, 0x80, GL
271 add %o1, 0x40, %o1
272 bgu,pt %XCC, 1f
273 srl GLOBAL_SPARE, 6, %o3
274 ba,pt %xcc, 2f
275 nop
276
277 .align 64
278 1:
279 EX_LD_FP(LOAD(ldd, %o1 + 0x008, %f2),
280 faligndata %f12, %f14, %f28
281 EX_LD_FP(LOAD(ldd, %o1 + 0x010, %f4),
282 faligndata %f14, %f0, %f30
283 EX_ST_FP(STORE_BLK(%f16, %o0), U3_retl
284 EX_LD_FP(LOAD(ldd, %o1 + 0x018, %f6),
285 faligndata %f0, %f2, %f16
286 add %o0, 0x40, %o0
287
288 EX_LD_FP(LOAD(ldd, %o1 + 0x020, %f8),
289 faligndata %f2, %f4, %f18
290 EX_LD_FP(LOAD(ldd, %o1 + 0x028, %f10),
291 faligndata %f4, %f6, %f20
292 EX_LD_FP(LOAD(ldd, %o1 + 0x030, %f12),
293 subcc %o3, 0x01, %o3
294 faligndata %f6, %f8, %f22
295 EX_LD_FP(LOAD(ldd, %o1 + 0x038, %f14),
296
297 faligndata %f8, %f10, %f24
298 EX_LD_FP(LOAD(ldd, %o1 + 0x040, %f0),
299 LOAD(prefetch, %o1 + 0x1c0, #one_read)
300 faligndata %f10, %f12, %f26
301 bg,pt %XCC, 1b
302 add %o1, 0x40, %o1
303
304 /* Finally we copy the last full 64-by
305 2:
306 EX_LD_FP(LOAD(ldd, %o1 + 0x008, %f2),
307 faligndata %f12, %f14, %f28
308 EX_LD_FP(LOAD(ldd, %o1 + 0x010, %f4),
309 faligndata %f14, %f0, %f30
310 EX_ST_FP(STORE_BLK(%f16, %o0), U3_retl
311 EX_LD_FP(LOAD(ldd, %o1 + 0x018, %f6),
312 faligndata %f0, %f2, %f16
313 EX_LD_FP(LOAD(ldd, %o1 + 0x020, %f8),
314 faligndata %f2, %f4, %f18
315 EX_LD_FP(LOAD(ldd, %o1 + 0x028, %f10),
316 faligndata %f4, %f6, %f20
317 EX_LD_FP(LOAD(ldd, %o1 + 0x030, %f12),
318 faligndata %f6, %f8, %f22
319 EX_LD_FP(LOAD(ldd, %o1 + 0x038, %f14),
320 faligndata %f8, %f10, %f24
321 cmp %g1, 0
322 be,pt %XCC, 1f
323 add %o0, 0x40, %o0
324 EX_LD_FP(LOAD(ldd, %o1 + 0x040, %f0),
325 1: faligndata %f10, %f12, %f26
326 faligndata %f12, %f14, %f28
327 faligndata %f14, %f0, %f30
328 EX_ST_FP(STORE_BLK(%f16, %o0), U3_retl
329 add %o0, 0x40, %o0
330 add %o1, 0x40, %o1
331 membar #Sync
332
333 /* Now we copy the (len modulo 64) byt
334 * Note how we borrow the %f0 loaded a
335 *
336 * Also notice how this code is carefu
337 * load past the end of the src buffer
338 */
339 and %o2, 0x3f, %o2
340 andcc %o2, 0x38, %g2
341 be,pn %XCC, 2f
342 subcc %g2, 0x8, %g2
343 be,pn %XCC, 2f
344 cmp %g1, 0
345
346 sub %o2, %g2, %o2
347 be,a,pt %XCC, 1f
348 EX_LD_FP(LOAD(ldd, %o1 + 0x00, %f0),
349
350 1: EX_LD_FP(LOAD(ldd, %o1 + 0x08, %f2), U
351 add %o1, 0x8, %o1
352 subcc %g2, 0x8, %g2
353 faligndata %f0, %f2, %f8
354 EX_ST_FP(STORE(std, %f8, %o0), U3_retl
355 be,pn %XCC, 2f
356 add %o0, 0x8, %o0
357 EX_LD_FP(LOAD(ldd, %o1 + 0x08, %f0), U
358 add %o1, 0x8, %o1
359 subcc %g2, 0x8, %g2
360 faligndata %f2, %f0, %f8
361 EX_ST_FP(STORE(std, %f8, %o0), U3_retl
362 bne,pn %XCC, 1b
363 add %o0, 0x8, %o0
364
365 /* If anything is left, we copy it one
366 * Note that %g1 is (src & 0x3) saved
367 * alignaddr was performed.
368 */
369 2:
370 cmp %o2, 0
371 add %o1, %g1, %o1
372 VISExitHalf
373 be,pn %XCC, end_return
374 sub %o0, %o1, %o3
375
376 andcc %g1, 0x7, %g0
377 bne,pn %icc, 90f
378 andcc %o2, 0x8, %g0
379 be,pt %icc, 1f
380 nop
381 EX_LD(LOAD(ldx, %o1, %o5), U3_retl_o2)
382 EX_ST(STORE(stx, %o5, %o1 + %o3), U3_r
383 add %o1, 0x8, %o1
384 sub %o2, 8, %o2
385
386 1: andcc %o2, 0x4, %g0
387 be,pt %icc, 1f
388 nop
389 EX_LD(LOAD(lduw, %o1, %o5), U3_retl_o2
390 EX_ST(STORE(stw, %o5, %o1 + %o3), U3_r
391 add %o1, 0x4, %o1
392 sub %o2, 4, %o2
393
394 1: andcc %o2, 0x2, %g0
395 be,pt %icc, 1f
396 nop
397 EX_LD(LOAD(lduh, %o1, %o5), U3_retl_o2
398 EX_ST(STORE(sth, %o5, %o1 + %o3), U3_r
399 add %o1, 0x2, %o1
400 sub %o2, 2, %o2
401
402 1: andcc %o2, 0x1, %g0
403 be,pt %icc, end_return
404 nop
405 EX_LD(LOAD(ldub, %o1, %o5), U3_retl_o2
406 ba,pt %xcc, end_return
407 EX_ST(STORE(stb, %o5, %o1 + %o3), U3_
408
409 .align 64
410 /* 16 <= len < 192 */
411 less_than_192:
412 bne,pn %XCC, 75f
413 sub %o0, %o1, %o3
414
415 72:
416 andn %o2, 0xf, GLOBAL_SPARE
417 and %o2, 0xf, %o2
418 1: subcc GLOBAL_SPARE, 0x10, GL
419 EX_LD(LOAD(ldx, %o1 + 0x00, %o5), U3_r
420 EX_LD(LOAD(ldx, %o1 + 0x08, %g1), U3_r
421 EX_ST(STORE(stx, %o5, %o1 + %o3), U3_r
422 add %o1, 0x8, %o1
423 EX_ST(STORE(stx, %g1, %o1 + %o3), U3_r
424 bgu,pt %XCC, 1b
425 add %o1, 0x8, %o1
426 73: andcc %o2, 0x8, %g0
427 be,pt %XCC, 1f
428 nop
429 sub %o2, 0x8, %o2
430 EX_LD(LOAD(ldx, %o1, %o5), U3_retl_o2_
431 EX_ST(STORE(stx, %o5, %o1 + %o3), U3_r
432 add %o1, 0x8, %o1
433 1: andcc %o2, 0x4, %g0
434 be,pt %XCC, 1f
435 nop
436 sub %o2, 0x4, %o2
437 EX_LD(LOAD(lduw, %o1, %o5), U3_retl_o2
438 EX_ST(STORE(stw, %o5, %o1 + %o3), U3_r
439 add %o1, 0x4, %o1
440 1: cmp %o2, 0
441 be,pt %XCC, end_return
442 nop
443 ba,pt %xcc, 90f
444 nop
445
446 75:
447 andcc %o0, 0x7, %g1
448 sub %g1, 0x8, %g1
449 be,pn %icc, 2f
450 sub %g0, %g1, %g1
451 sub %o2, %g1, %o2
452
453 1: subcc %g1, 1, %g1
454 EX_LD(LOAD(ldub, %o1, %o5), U3_retl_o2
455 EX_ST(STORE(stb, %o5, %o1 + %o3), U3_r
456 bgu,pt %icc, 1b
457 add %o1, 1, %o1
458
459 2: add %o1, %o3, %o0
460 andcc %o1, 0x7, %g1
461 bne,pt %icc, 8f
462 sll %g1, 3, %g1
463
464 cmp %o2, 16
465 bgeu,pt %icc, 72b
466 nop
467 ba,a,pt %xcc, 73b
468
469 8: mov 64, %o3
470 andn %o1, 0x7, %o1
471 EX_LD(LOAD(ldx, %o1, %g2), U3_retl_o2)
472 sub %o3, %g1, %o3
473 andn %o2, 0x7, GLOBAL_SPARE
474 sllx %g2, %g1, %g2
475 1: EX_LD(LOAD(ldx, %o1 + 0x8, %g3), U3_re
476 subcc GLOBAL_SPARE, 0x8, GLO
477 add %o1, 0x8, %o1
478 srlx %g3, %o3, %o5
479 or %o5, %g2, %o5
480 EX_ST(STORE(stx, %o5, %o0), U3_retl_o2
481 add %o0, 0x8, %o0
482 bgu,pt %icc, 1b
483 sllx %g3, %g1, %g2
484
485 srl %g1, 3, %g1
486 andcc %o2, 0x7, %o2
487 be,pn %icc, end_return
488 add %o1, %g1, %o1
489 ba,pt %xcc, 90f
490 sub %o0, %o1, %o3
491
492 .align 64
493 /* 0 < len < 16 */
494 less_than_16:
495 andcc %o3, 0x3, %g0
496 bne,pn %XCC, 90f
497 sub %o0, %o1, %o3
498
499 1:
500 subcc %o2, 4, %o2
501 EX_LD(LOAD(lduw, %o1, %g1), U3_retl_o2
502 EX_ST(STORE(stw, %g1, %o1 + %o3), U3_r
503 bgu,pt %XCC, 1b
504 add %o1, 4, %o1
505
506 end_return:
507 retl
508 mov EX_RETVAL(%o4), %o0
509
510 .align 32
511 90:
512 subcc %o2, 1, %o2
513 EX_LD(LOAD(ldub, %o1, %g1), U3_retl_o2
514 EX_ST(STORE(stb, %g1, %o1 + %o3), U3_r
515 bgu,pt %XCC, 90b
516 add %o1, 1, %o1
517 retl
518 mov EX_RETVAL(%o4), %o0
519
520 .size FUNC_NAME, .-FUNC_NAME
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