1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* NG2memcpy.S: Niagara-2 optimized memcpy.
3 *
4 * Copyright (C) 2007 David S. Miller (davem@d
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_PNF 0x82
14 #define ASI_BLK_P 0xf0
15 #define ASI_BLK_INIT_QUAD_LDD_P 0xe2
16 #define FPRS_FEF 0x04
17 #ifdef MEMCPY_DEBUG
18 #define VISEntryHalf rd %fprs, %o5; wr %g0, FP
19 clr %g1; clr %g2; clr %g3
20 #define VISExitHalf and %o5, FPRS_FEF, %o5; wr
21 #else
22 #define VISEntryHalf rd %fprs, %o5; wr %g0, FP
23 #define VISExitHalf and %o5, FPRS_FEF, %o5; wr
24 #endif
25 #define GLOBAL_SPARE %g5
26 #endif
27
28 #ifndef STORE_ASI
29 #ifndef SIMULATE_NIAGARA_ON_NON_NIAGARA
30 #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_
31 #else
32 #define STORE_ASI 0x80 /* ASI
33 #endif
34 #endif
35
36 #ifndef EX_LD
37 #define EX_LD(x,y) x
38 #endif
39 #ifndef EX_LD_FP
40 #define EX_LD_FP(x,y) x
41 #endif
42
43 #ifndef EX_ST
44 #define EX_ST(x,y) x
45 #endif
46 #ifndef EX_ST_FP
47 #define EX_ST_FP(x,y) x
48 #endif
49
50 #ifndef LOAD
51 #define LOAD(type,addr,dest) type [addr], d
52 #endif
53
54 #ifndef LOAD_BLK
55 #define LOAD_BLK(addr,dest) ldda [addr] AS
56 #endif
57
58 #ifndef STORE
59 #ifndef MEMCPY_DEBUG
60 #define STORE(type,src,addr) type src, [add
61 #else
62 #define STORE(type,src,addr) type##a src, [
63 #endif
64 #endif
65
66 #ifndef STORE_BLK
67 #define STORE_BLK(src,addr) stda src, [add
68 #endif
69
70 #ifndef STORE_INIT
71 #define STORE_INIT(src,addr) stxa src, [add
72 #endif
73
74 #ifndef FUNC_NAME
75 #define FUNC_NAME NG2memcpy
76 #endif
77
78 #ifndef PREAMBLE
79 #define PREAMBLE
80 #endif
81
82 #ifndef XCC
83 #define XCC xcc
84 #endif
85
86 #define FREG_FROB(x0, x1, x2, x3, x4, x5, x6,
87 faligndata %x0, %x1, %f0; \
88 faligndata %x1, %x2, %f2; \
89 faligndata %x2, %x3, %f4; \
90 faligndata %x3, %x4, %f6; \
91 faligndata %x4, %x5, %f8; \
92 faligndata %x5, %x6, %f10; \
93 faligndata %x6, %x7, %f12; \
94 faligndata %x7, %x8, %f14;
95
96 #define FREG_MOVE_1(x0) \
97 fsrc2 %x0, %f0;
98 #define FREG_MOVE_2(x0, x1) \
99 fsrc2 %x0, %f0; \
100 fsrc2 %x1, %f2;
101 #define FREG_MOVE_3(x0, x1, x2) \
102 fsrc2 %x0, %f0; \
103 fsrc2 %x1, %f2; \
104 fsrc2 %x2, %f4;
105 #define FREG_MOVE_4(x0, x1, x2, x3) \
106 fsrc2 %x0, %f0; \
107 fsrc2 %x1, %f2; \
108 fsrc2 %x2, %f4; \
109 fsrc2 %x3, %f6;
110 #define FREG_MOVE_5(x0, x1, x2, x3, x4) \
111 fsrc2 %x0, %f0; \
112 fsrc2 %x1, %f2; \
113 fsrc2 %x2, %f4; \
114 fsrc2 %x3, %f6; \
115 fsrc2 %x4, %f8;
116 #define FREG_MOVE_6(x0, x1, x2, x3, x4, x5) \
117 fsrc2 %x0, %f0; \
118 fsrc2 %x1, %f2; \
119 fsrc2 %x2, %f4; \
120 fsrc2 %x3, %f6; \
121 fsrc2 %x4, %f8; \
122 fsrc2 %x5, %f10;
123 #define FREG_MOVE_7(x0, x1, x2, x3, x4, x5, x6
124 fsrc2 %x0, %f0; \
125 fsrc2 %x1, %f2; \
126 fsrc2 %x2, %f4; \
127 fsrc2 %x3, %f6; \
128 fsrc2 %x4, %f8; \
129 fsrc2 %x5, %f10; \
130 fsrc2 %x6, %f12;
131 #define FREG_MOVE_8(x0, x1, x2, x3, x4, x5, x6
132 fsrc2 %x0, %f0; \
133 fsrc2 %x1, %f2; \
134 fsrc2 %x2, %f4; \
135 fsrc2 %x3, %f6; \
136 fsrc2 %x4, %f8; \
137 fsrc2 %x5, %f10; \
138 fsrc2 %x6, %f12; \
139 fsrc2 %x7, %f14;
140 #define FREG_LOAD_1(base, x0) \
141 EX_LD_FP(LOAD(ldd, base + 0x00, %x0),
142 #define FREG_LOAD_2(base, x0, x1) \
143 EX_LD_FP(LOAD(ldd, base + 0x00, %x0),
144 EX_LD_FP(LOAD(ldd, base + 0x08, %x1),
145 #define FREG_LOAD_3(base, x0, x1, x2) \
146 EX_LD_FP(LOAD(ldd, base + 0x00, %x0),
147 EX_LD_FP(LOAD(ldd, base + 0x08, %x1),
148 EX_LD_FP(LOAD(ldd, base + 0x10, %x2),
149 #define FREG_LOAD_4(base, x0, x1, x2, x3) \
150 EX_LD_FP(LOAD(ldd, base + 0x00, %x0),
151 EX_LD_FP(LOAD(ldd, base + 0x08, %x1),
152 EX_LD_FP(LOAD(ldd, base + 0x10, %x2),
153 EX_LD_FP(LOAD(ldd, base + 0x18, %x3),
154 #define FREG_LOAD_5(base, x0, x1, x2, x3, x4)
155 EX_LD_FP(LOAD(ldd, base + 0x00, %x0),
156 EX_LD_FP(LOAD(ldd, base + 0x08, %x1),
157 EX_LD_FP(LOAD(ldd, base + 0x10, %x2),
158 EX_LD_FP(LOAD(ldd, base + 0x18, %x3),
159 EX_LD_FP(LOAD(ldd, base + 0x20, %x4),
160 #define FREG_LOAD_6(base, x0, x1, x2, x3, x4,
161 EX_LD_FP(LOAD(ldd, base + 0x00, %x0),
162 EX_LD_FP(LOAD(ldd, base + 0x08, %x1),
163 EX_LD_FP(LOAD(ldd, base + 0x10, %x2),
164 EX_LD_FP(LOAD(ldd, base + 0x18, %x3),
165 EX_LD_FP(LOAD(ldd, base + 0x20, %x4),
166 EX_LD_FP(LOAD(ldd, base + 0x28, %x5),
167 #define FREG_LOAD_7(base, x0, x1, x2, x3, x4,
168 EX_LD_FP(LOAD(ldd, base + 0x00, %x0),
169 EX_LD_FP(LOAD(ldd, base + 0x08, %x1),
170 EX_LD_FP(LOAD(ldd, base + 0x10, %x2),
171 EX_LD_FP(LOAD(ldd, base + 0x18, %x3),
172 EX_LD_FP(LOAD(ldd, base + 0x20, %x4),
173 EX_LD_FP(LOAD(ldd, base + 0x28, %x5),
174 EX_LD_FP(LOAD(ldd, base + 0x30, %x6),
175
176 .register %g2,#scratch
177 .register %g3,#scratch
178
179 .text
180 #ifndef EX_RETVAL
181 #define EX_RETVAL(x) x
182 __restore_fp:
183 VISExitHalf
184 __restore_asi:
185 retl
186 wr %g0, ASI_AIUS, %asi
187 ENTRY(NG2_retl_o2)
188 ba,pt %xcc, __restore_asi
189 mov %o2, %o0
190 ENDPROC(NG2_retl_o2)
191 ENTRY(NG2_retl_o2_plus_1)
192 ba,pt %xcc, __restore_asi
193 add %o2, 1, %o0
194 ENDPROC(NG2_retl_o2_plus_1)
195 ENTRY(NG2_retl_o2_plus_4)
196 ba,pt %xcc, __restore_asi
197 add %o2, 4, %o0
198 ENDPROC(NG2_retl_o2_plus_4)
199 ENTRY(NG2_retl_o2_plus_8)
200 ba,pt %xcc, __restore_asi
201 add %o2, 8, %o0
202 ENDPROC(NG2_retl_o2_plus_8)
203 ENTRY(NG2_retl_o2_plus_o4_plus_1)
204 add %o4, 1, %o4
205 ba,pt %xcc, __restore_asi
206 add %o2, %o4, %o0
207 ENDPROC(NG2_retl_o2_plus_o4_plus_1)
208 ENTRY(NG2_retl_o2_plus_o4_plus_8)
209 add %o4, 8, %o4
210 ba,pt %xcc, __restore_asi
211 add %o2, %o4, %o0
212 ENDPROC(NG2_retl_o2_plus_o4_plus_8)
213 ENTRY(NG2_retl_o2_plus_o4_plus_16)
214 add %o4, 16, %o4
215 ba,pt %xcc, __restore_asi
216 add %o2, %o4, %o0
217 ENDPROC(NG2_retl_o2_plus_o4_plus_16)
218 ENTRY(NG2_retl_o2_plus_g1_fp)
219 ba,pt %xcc, __restore_fp
220 add %o2, %g1, %o0
221 ENDPROC(NG2_retl_o2_plus_g1_fp)
222 ENTRY(NG2_retl_o2_plus_g1_plus_64_fp)
223 add %g1, 64, %g1
224 ba,pt %xcc, __restore_fp
225 add %o2, %g1, %o0
226 ENDPROC(NG2_retl_o2_plus_g1_plus_64_fp)
227 ENTRY(NG2_retl_o2_plus_g1_plus_1)
228 add %g1, 1, %g1
229 ba,pt %xcc, __restore_asi
230 add %o2, %g1, %o0
231 ENDPROC(NG2_retl_o2_plus_g1_plus_1)
232 ENTRY(NG2_retl_o2_and_7_plus_o4)
233 and %o2, 7, %o2
234 ba,pt %xcc, __restore_asi
235 add %o2, %o4, %o0
236 ENDPROC(NG2_retl_o2_and_7_plus_o4)
237 ENTRY(NG2_retl_o2_and_7_plus_o4_plus_8)
238 and %o2, 7, %o2
239 add %o4, 8, %o4
240 ba,pt %xcc, __restore_asi
241 add %o2, %o4, %o0
242 ENDPROC(NG2_retl_o2_and_7_plus_o4_plus_8)
243 #endif
244
245 .align 64
246
247 .globl FUNC_NAME
248 .type FUNC_NAME,#function
249 FUNC_NAME: /* %o0=dst, %o1=src, %o2=len *
250 srlx %o2, 31, %g2
251 cmp %g2, 0
252 tne %xcc, 5
253 PREAMBLE
254 mov %o0, %o3
255 cmp %o2, 0
256 be,pn %XCC, 85f
257 or %o0, %o1, GLOBAL_SPARE
258 cmp %o2, 16
259 blu,a,pn %XCC, 80f
260 or GLOBAL_SPARE, %o2, GLO
261
262 /* 2 blocks (128 bytes) is the minimum
263 * copy with. We need to ensure that
264 * once in the block copy loop. At wo
265 * the destination to a 64-byte bounda
266 * to (64 - 1) bytes from the length b
267 * block copy loop.
268 *
269 * However, the cut-off point, perform
270 * 4 64-byte blocks.
271 */
272 cmp %o2, (4 * 64)
273 blu,pt %XCC, 75f
274 andcc GLOBAL_SPARE, 0x7, %g0
275
276 /* %o0: dst
277 * %o1: src
278 * %o2: len (known to be >= 128)
279 *
280 * The block copy loops can use %o4, %
281 * temporaries while copying the data.
282 * be preserved between VISEntryHalf a
283 */
284
285 LOAD(prefetch, %o1 + 0x000, #one_read)
286 LOAD(prefetch, %o1 + 0x040, #one_read)
287 LOAD(prefetch, %o1 + 0x080, #one_read)
288
289 /* Align destination on 64-byte bounda
290 andcc %o0, (64 - 1), %o4
291 be,pt %XCC, 2f
292 sub %o4, 64, %o4
293 sub %g0, %o4, %o4 ! byte
294 sub %o2, %o4, %o2
295 1: subcc %o4, 1, %o4
296 EX_LD(LOAD(ldub, %o1, %g1), NG2_retl_o
297 EX_ST(STORE(stb, %g1, %o0), NG2_retl_o
298 add %o1, 1, %o1
299 bne,pt %XCC, 1b
300 add %o0, 1, %o0
301
302 2:
303 /* Clobbers o5/g1/g2/g3/g7/icc/xcc. W
304 * o5 from here until we hit VISExitHa
305 */
306 VISEntryHalf
307
308 membar #Sync
309 alignaddr %o1, %g0, %g0
310
311 add %o1, (64 - 1), %o4
312 andn %o4, (64 - 1), %o4
313 andn %o2, (64 - 1), %g1
314 sub %o2, %g1, %o2
315
316 and %o1, (64 - 1), %g2
317 add %o1, %g1, %o1
318 sub %o0, %o4, %g3
319 brz,pt %g2, 190f
320 cmp %g2, 32
321 blu,a 5f
322 cmp %g2, 16
323 cmp %g2, 48
324 blu,a 4f
325 cmp %g2, 40
326 cmp %g2, 56
327 blu 170f
328 nop
329 ba,a,pt %xcc, 180f
330 nop
331
332 4: /* 32 <= low bits < 48 */
333 blu 150f
334 nop
335 ba,a,pt %xcc, 160f
336 nop
337 5: /* 0 < low bits < 32 */
338 blu,a 6f
339 cmp %g2, 8
340 cmp %g2, 24
341 blu 130f
342 nop
343 ba,a,pt %xcc, 140f
344 nop
345 6: /* 0 < low bits < 16 */
346 bgeu 120f
347 nop
348 /* fall through for 0 < low bits < 8 *
349 110: sub %o4, 64, %g2
350 EX_LD_FP(LOAD_BLK(%g2, %f0), NG2_retl_
351 1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), N
352 EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl
353 FREG_FROB(f0, f2, f4, f6, f8, f10, f12
354 EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG
355 FREG_MOVE_8(f16, f18, f20, f22, f24, f
356 subcc %g1, 64, %g1
357 add %o4, 64, %o4
358 bne,pt %xcc, 1b
359 LOAD(prefetch, %o4 + 64, #one_read)
360 ba,pt %xcc, 195f
361 nop
362
363 120: sub %o4, 56, %g2
364 FREG_LOAD_7(%g2, f0, f2, f4, f6, f8, f
365 1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), N
366 EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl
367 FREG_FROB(f0, f2, f4, f6, f8, f10, f12
368 EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG
369 FREG_MOVE_7(f18, f20, f22, f24, f26, f
370 subcc %g1, 64, %g1
371 add %o4, 64, %o4
372 bne,pt %xcc, 1b
373 LOAD(prefetch, %o4 + 64, #one_read)
374 ba,pt %xcc, 195f
375 nop
376
377 130: sub %o4, 48, %g2
378 FREG_LOAD_6(%g2, f0, f2, f4, f6, f8, f
379 1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), N
380 EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl
381 FREG_FROB(f0, f2, f4, f6, f8, f10, f16
382 EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG
383 FREG_MOVE_6(f20, f22, f24, f26, f28, f
384 subcc %g1, 64, %g1
385 add %o4, 64, %o4
386 bne,pt %xcc, 1b
387 LOAD(prefetch, %o4 + 64, #one_read)
388 ba,pt %xcc, 195f
389 nop
390
391 140: sub %o4, 40, %g2
392 FREG_LOAD_5(%g2, f0, f2, f4, f6, f8)
393 1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), N
394 EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl
395 FREG_FROB(f0, f2, f4, f6, f8, f16, f18
396 EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG
397 FREG_MOVE_5(f22, f24, f26, f28, f30)
398 subcc %g1, 64, %g1
399 add %o4, 64, %o4
400 bne,pt %xcc, 1b
401 LOAD(prefetch, %o4 + 64, #one_read)
402 ba,pt %xcc, 195f
403 nop
404
405 150: sub %o4, 32, %g2
406 FREG_LOAD_4(%g2, f0, f2, f4, f6)
407 1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), N
408 EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl
409 FREG_FROB(f0, f2, f4, f6, f16, f18, f2
410 EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG
411 FREG_MOVE_4(f24, f26, f28, f30)
412 subcc %g1, 64, %g1
413 add %o4, 64, %o4
414 bne,pt %xcc, 1b
415 LOAD(prefetch, %o4 + 64, #one_read)
416 ba,pt %xcc, 195f
417 nop
418
419 160: sub %o4, 24, %g2
420 FREG_LOAD_3(%g2, f0, f2, f4)
421 1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), N
422 EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl
423 FREG_FROB(f0, f2, f4, f16, f18, f20, f
424 EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG
425 FREG_MOVE_3(f26, f28, f30)
426 subcc %g1, 64, %g1
427 add %o4, 64, %o4
428 bne,pt %xcc, 1b
429 LOAD(prefetch, %o4 + 64, #one_read)
430 ba,pt %xcc, 195f
431 nop
432
433 170: sub %o4, 16, %g2
434 FREG_LOAD_2(%g2, f0, f2)
435 1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), N
436 EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl
437 FREG_FROB(f0, f2, f16, f18, f20, f22,
438 EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG
439 FREG_MOVE_2(f28, f30)
440 subcc %g1, 64, %g1
441 add %o4, 64, %o4
442 bne,pt %xcc, 1b
443 LOAD(prefetch, %o4 + 64, #one_read)
444 ba,pt %xcc, 195f
445 nop
446
447 180: sub %o4, 8, %g2
448 FREG_LOAD_1(%g2, f0)
449 1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), N
450 EX_LD_FP(LOAD_BLK(%o4, %f16), NG2_retl
451 FREG_FROB(f0, f16, f18, f20, f22, f24,
452 EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG
453 FREG_MOVE_1(f30)
454 subcc %g1, 64, %g1
455 add %o4, 64, %o4
456 bne,pt %xcc, 1b
457 LOAD(prefetch, %o4 + 64, #one_read)
458 ba,pt %xcc, 195f
459 nop
460
461 190:
462 1: EX_ST_FP(STORE_INIT(%g0, %o4 + %g3), N
463 subcc %g1, 64, %g1
464 EX_LD_FP(LOAD_BLK(%o4, %f0), NG2_retl_
465 EX_ST_FP(STORE_BLK(%f0, %o4 + %g3), NG
466 add %o4, 64, %o4
467 bne,pt %xcc, 1b
468 LOAD(prefetch, %o4 + 64, #one_read)
469
470 195:
471 add %o4, %g3, %o0
472 membar #Sync
473
474 VISExitHalf
475
476 /* %o2 contains any final bytes still
477 * over. If anything is left, we copy
478 */
479 brz,pt %o2, 85f
480 sub %o0, %o1, GLOBAL_SPARE
481 ba,a,pt %XCC, 90f
482 nop
483
484 .align 64
485 75: /* 16 < len <= 64 */
486 bne,pn %XCC, 75f
487 sub %o0, %o1, GLOBAL_SPARE
488
489 72:
490 andn %o2, 0xf, %o4
491 and %o2, 0xf, %o2
492 1: subcc %o4, 0x10, %o4
493 EX_LD(LOAD(ldx, %o1, %o5), NG2_retl_o2
494 add %o1, 0x08, %o1
495 EX_LD(LOAD(ldx, %o1, %g1), NG2_retl_o2
496 sub %o1, 0x08, %o1
497 EX_ST(STORE(stx, %o5, %o1 + GLOBAL_SPA
498 add %o1, 0x8, %o1
499 EX_ST(STORE(stx, %g1, %o1 + GLOBAL_SPA
500 bgu,pt %XCC, 1b
501 add %o1, 0x8, %o1
502 73: andcc %o2, 0x8, %g0
503 be,pt %XCC, 1f
504 nop
505 sub %o2, 0x8, %o2
506 EX_LD(LOAD(ldx, %o1, %o5), NG2_retl_o2
507 EX_ST(STORE(stx, %o5, %o1 + GLOBAL_SPA
508 add %o1, 0x8, %o1
509 1: andcc %o2, 0x4, %g0
510 be,pt %XCC, 1f
511 nop
512 sub %o2, 0x4, %o2
513 EX_LD(LOAD(lduw, %o1, %o5), NG2_retl_o
514 EX_ST(STORE(stw, %o5, %o1 + GLOBAL_SPA
515 add %o1, 0x4, %o1
516 1: cmp %o2, 0
517 be,pt %XCC, 85f
518 nop
519 ba,pt %xcc, 90f
520 nop
521
522 75:
523 andcc %o0, 0x7, %g1
524 sub %g1, 0x8, %g1
525 be,pn %icc, 2f
526 sub %g0, %g1, %g1
527 sub %o2, %g1, %o2
528
529 1: subcc %g1, 1, %g1
530 EX_LD(LOAD(ldub, %o1, %o5), NG2_retl_o
531 EX_ST(STORE(stb, %o5, %o1 + GLOBAL_SPA
532 bgu,pt %icc, 1b
533 add %o1, 1, %o1
534
535 2: add %o1, GLOBAL_SPARE, %o0
536 andcc %o1, 0x7, %g1
537 bne,pt %icc, 8f
538 sll %g1, 3, %g1
539
540 cmp %o2, 16
541 bgeu,pt %icc, 72b
542 nop
543 ba,a,pt %xcc, 73b
544
545 8: mov 64, GLOBAL_SPARE
546 andn %o1, 0x7, %o1
547 EX_LD(LOAD(ldx, %o1, %g2), NG2_retl_o2
548 sub GLOBAL_SPARE, %g1, GLO
549 andn %o2, 0x7, %o4
550 sllx %g2, %g1, %g2
551 1: add %o1, 0x8, %o1
552 EX_LD(LOAD(ldx, %o1, %g3), NG2_retl_o2
553 subcc %o4, 0x8, %o4
554 srlx %g3, GLOBAL_SPARE, %o5
555 or %o5, %g2, %o5
556 EX_ST(STORE(stx, %o5, %o0), NG2_retl_o
557 add %o0, 0x8, %o0
558 bgu,pt %icc, 1b
559 sllx %g3, %g1, %g2
560
561 srl %g1, 3, %g1
562 andcc %o2, 0x7, %o2
563 be,pn %icc, 85f
564 add %o1, %g1, %o1
565 ba,pt %xcc, 90f
566 sub %o0, %o1, GLOBAL_SPARE
567
568 .align 64
569 80: /* 0 < len <= 16 */
570 andcc GLOBAL_SPARE, 0x3, %g0
571 bne,pn %XCC, 90f
572 sub %o0, %o1, GLOBAL_SPARE
573
574 1:
575 subcc %o2, 4, %o2
576 EX_LD(LOAD(lduw, %o1, %g1), NG2_retl_o
577 EX_ST(STORE(stw, %g1, %o1 + GLOBAL_SPA
578 bgu,pt %XCC, 1b
579 add %o1, 4, %o1
580
581 85: retl
582 mov EX_RETVAL(%o3), %o0
583
584 .align 32
585 90:
586 subcc %o2, 1, %o2
587 EX_LD(LOAD(ldub, %o1, %g1), NG2_retl_o
588 EX_ST(STORE(stb, %g1, %o1 + GLOBAL_SPA
589 bgu,pt %XCC, 90b
590 add %o1, 1, %o1
591 retl
592 mov EX_RETVAL(%o3), %o0
593
594 .size FUNC_NAME, .-FUNC_NAME
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