Root/arch/sparc/lib/U1memcpy.S

1/* U1memcpy.S: UltraSPARC-I/II/IIi/IIe optimized memcpy.
2 *
3 * Copyright (C) 1997, 2004 David S. Miller (davem@redhat.com)
4 * Copyright (C) 1996, 1997, 1998, 1999 Jakub Jelinek (jj@ultra.linux.cz)
5 */
6
7#ifdef __KERNEL__
8#include <asm/visasm.h>
9#include <asm/asi.h>
10#define GLOBAL_SPARE g7
11#else
12#define GLOBAL_SPARE g5
13#define ASI_BLK_P 0xf0
14#define FPRS_FEF 0x04
15#ifdef MEMCPY_DEBUG
16#define VISEntry rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs; \
17         clr %g1; clr %g2; clr %g3; subcc %g0, %g0, %g0;
18#define VISExit and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs
19#else
20#define VISEntry rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs
21#define VISExit and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs
22#endif
23#endif
24
25#ifndef EX_LD
26#define EX_LD(x) x
27#endif
28
29#ifndef EX_ST
30#define EX_ST(x) x
31#endif
32
33#ifndef EX_RETVAL
34#define EX_RETVAL(x) x
35#endif
36
37#ifndef LOAD
38#define LOAD(type,addr,dest) type [addr], dest
39#endif
40
41#ifndef LOAD_BLK
42#define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_P, dest
43#endif
44
45#ifndef STORE
46#define STORE(type,src,addr) type src, [addr]
47#endif
48
49#ifndef STORE_BLK
50#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_P
51#endif
52
53#ifndef FUNC_NAME
54#define FUNC_NAME memcpy
55#endif
56
57#ifndef PREAMBLE
58#define PREAMBLE
59#endif
60
61#ifndef XCC
62#define XCC xcc
63#endif
64
65#define FREG_FROB(f1, f2, f3, f4, f5, f6, f7, f8, f9) \
66    faligndata %f1, %f2, %f48; \
67    faligndata %f2, %f3, %f50; \
68    faligndata %f3, %f4, %f52; \
69    faligndata %f4, %f5, %f54; \
70    faligndata %f5, %f6, %f56; \
71    faligndata %f6, %f7, %f58; \
72    faligndata %f7, %f8, %f60; \
73    faligndata %f8, %f9, %f62;
74
75#define MAIN_LOOP_CHUNK(src, dest, fdest, fsrc, len, jmptgt) \
76    EX_LD(LOAD_BLK(%src, %fdest)); \
77    EX_ST(STORE_BLK(%fsrc, %dest)); \
78    add %src, 0x40, %src; \
79    subcc %len, 0x40, %len; \
80    be,pn %xcc, jmptgt; \
81     add %dest, 0x40, %dest; \
82
83#define LOOP_CHUNK1(src, dest, len, branch_dest) \
84    MAIN_LOOP_CHUNK(src, dest, f0, f48, len, branch_dest)
85#define LOOP_CHUNK2(src, dest, len, branch_dest) \
86    MAIN_LOOP_CHUNK(src, dest, f16, f48, len, branch_dest)
87#define LOOP_CHUNK3(src, dest, len, branch_dest) \
88    MAIN_LOOP_CHUNK(src, dest, f32, f48, len, branch_dest)
89
90#define DO_SYNC membar #Sync;
91#define STORE_SYNC(dest, fsrc) \
92    EX_ST(STORE_BLK(%fsrc, %dest)); \
93    add %dest, 0x40, %dest; \
94    DO_SYNC
95
96#define STORE_JUMP(dest, fsrc, target) \
97    EX_ST(STORE_BLK(%fsrc, %dest)); \
98    add %dest, 0x40, %dest; \
99    ba,pt %xcc, target; \
100     nop;
101
102#define FINISH_VISCHUNK(dest, f0, f1, left) \
103    subcc %left, 8, %left;\
104    bl,pn %xcc, 95f; \
105     faligndata %f0, %f1, %f48; \
106    EX_ST(STORE(std, %f48, %dest)); \
107    add %dest, 8, %dest;
108
109#define UNEVEN_VISCHUNK_LAST(dest, f0, f1, left) \
110    subcc %left, 8, %left; \
111    bl,pn %xcc, 95f; \
112     fsrc1 %f0, %f1;
113
114#define UNEVEN_VISCHUNK(dest, f0, f1, left) \
115    UNEVEN_VISCHUNK_LAST(dest, f0, f1, left) \
116    ba,a,pt %xcc, 93f;
117
118    .register %g2,#scratch
119    .register %g3,#scratch
120
121    .text
122    .align 64
123
124    .globl FUNC_NAME
125    .type FUNC_NAME,#function
126FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */
127    srlx %o2, 31, %g2
128    cmp %g2, 0
129    tne %xcc, 5
130    PREAMBLE
131    mov %o0, %o4
132    cmp %o2, 0
133    be,pn %XCC, 85f
134     or %o0, %o1, %o3
135    cmp %o2, 16
136    blu,a,pn %XCC, 80f
137     or %o3, %o2, %o3
138
139    cmp %o2, (5 * 64)
140    blu,pt %XCC, 70f
141     andcc %o3, 0x7, %g0
142
143    /* Clobbers o5/g1/g2/g3/g7/icc/xcc. */
144    VISEntry
145
146    /* Is 'dst' already aligned on an 64-byte boundary? */
147    andcc %o0, 0x3f, %g2
148    be,pt %XCC, 2f
149
150    /* Compute abs((dst & 0x3f) - 0x40) into %g2. This is the number
151     * of bytes to copy to make 'dst' 64-byte aligned. We pre-
152     * subtract this from 'len'.
153     */
154     sub %o0, %o1, %GLOBAL_SPARE
155    sub %g2, 0x40, %g2
156    sub %g0, %g2, %g2
157    sub %o2, %g2, %o2
158    andcc %g2, 0x7, %g1
159    be,pt %icc, 2f
160     and %g2, 0x38, %g2
161
1621: subcc %g1, 0x1, %g1
163    EX_LD(LOAD(ldub, %o1 + 0x00, %o3))
164    EX_ST(STORE(stb, %o3, %o1 + %GLOBAL_SPARE))
165    bgu,pt %XCC, 1b
166     add %o1, 0x1, %o1
167
168    add %o1, %GLOBAL_SPARE, %o0
169
1702: cmp %g2, 0x0
171    and %o1, 0x7, %g1
172    be,pt %icc, 3f
173     alignaddr %o1, %g0, %o1
174
175    EX_LD(LOAD(ldd, %o1, %f4))
1761: EX_LD(LOAD(ldd, %o1 + 0x8, %f6))
177    add %o1, 0x8, %o1
178    subcc %g2, 0x8, %g2
179    faligndata %f4, %f6, %f0
180    EX_ST(STORE(std, %f0, %o0))
181    be,pn %icc, 3f
182     add %o0, 0x8, %o0
183
184    EX_LD(LOAD(ldd, %o1 + 0x8, %f4))
185    add %o1, 0x8, %o1
186    subcc %g2, 0x8, %g2
187    faligndata %f6, %f4, %f0
188    EX_ST(STORE(std, %f0, %o0))
189    bne,pt %icc, 1b
190     add %o0, 0x8, %o0
191
192    /* Destination is 64-byte aligned. */
1933:
194    membar #LoadStore | #StoreStore | #StoreLoad
195
196    subcc %o2, 0x40, %GLOBAL_SPARE
197    add %o1, %g1, %g1
198    andncc %GLOBAL_SPARE, (0x40 - 1), %GLOBAL_SPARE
199    srl %g1, 3, %g2
200    sub %o2, %GLOBAL_SPARE, %g3
201    andn %o1, (0x40 - 1), %o1
202    and %g2, 7, %g2
203    andncc %g3, 0x7, %g3
204    fmovd %f0, %f2
205    sub %g3, 0x8, %g3
206    sub %o2, %GLOBAL_SPARE, %o2
207
208    add %g1, %GLOBAL_SPARE, %g1
209    subcc %o2, %g3, %o2
210
211    EX_LD(LOAD_BLK(%o1, %f0))
212    add %o1, 0x40, %o1
213    add %g1, %g3, %g1
214    EX_LD(LOAD_BLK(%o1, %f16))
215    add %o1, 0x40, %o1
216    sub %GLOBAL_SPARE, 0x80, %GLOBAL_SPARE
217    EX_LD(LOAD_BLK(%o1, %f32))
218    add %o1, 0x40, %o1
219
220    /* There are 8 instances of the unrolled loop,
221     * one for each possible alignment of the
222     * source buffer. Each loop instance is 452
223     * bytes.
224     */
225    sll %g2, 3, %o3
226    sub %o3, %g2, %o3
227    sllx %o3, 4, %o3
228    add %o3, %g2, %o3
229    sllx %o3, 2, %g2
2301: rd %pc, %o3
231    add %o3, %lo(1f - 1b), %o3
232    jmpl %o3 + %g2, %g0
233     nop
234
235    .align 64
2361: FREG_FROB(f0, f2, f4, f6, f8, f10,f12,f14,f16)
237    LOOP_CHUNK1(o1, o0, GLOBAL_SPARE, 1f)
238    FREG_FROB(f16,f18,f20,f22,f24,f26,f28,f30,f32)
239    LOOP_CHUNK2(o1, o0, GLOBAL_SPARE, 2f)
240    FREG_FROB(f32,f34,f36,f38,f40,f42,f44,f46,f0)
241    LOOP_CHUNK3(o1, o0, GLOBAL_SPARE, 3f)
242    ba,pt %xcc, 1b+4
243     faligndata %f0, %f2, %f48
2441: FREG_FROB(f16,f18,f20,f22,f24,f26,f28,f30,f32)
245    STORE_SYNC(o0, f48)
246    FREG_FROB(f32,f34,f36,f38,f40,f42,f44,f46,f0)
247    STORE_JUMP(o0, f48, 40f)
2482: FREG_FROB(f32,f34,f36,f38,f40,f42,f44,f46,f0)
249    STORE_SYNC(o0, f48)
250    FREG_FROB(f0, f2, f4, f6, f8, f10,f12,f14,f16)
251    STORE_JUMP(o0, f48, 48f)
2523: FREG_FROB(f0, f2, f4, f6, f8, f10,f12,f14,f16)
253    STORE_SYNC(o0, f48)
254    FREG_FROB(f16,f18,f20,f22,f24,f26,f28,f30,f32)
255    STORE_JUMP(o0, f48, 56f)
256
2571: FREG_FROB(f2, f4, f6, f8, f10,f12,f14,f16,f18)
258    LOOP_CHUNK1(o1, o0, GLOBAL_SPARE, 1f)
259    FREG_FROB(f18,f20,f22,f24,f26,f28,f30,f32,f34)
260    LOOP_CHUNK2(o1, o0, GLOBAL_SPARE, 2f)
261    FREG_FROB(f34,f36,f38,f40,f42,f44,f46,f0, f2)
262    LOOP_CHUNK3(o1, o0, GLOBAL_SPARE, 3f)
263    ba,pt %xcc, 1b+4
264     faligndata %f2, %f4, %f48
2651: FREG_FROB(f18,f20,f22,f24,f26,f28,f30,f32,f34)
266    STORE_SYNC(o0, f48)
267    FREG_FROB(f34,f36,f38,f40,f42,f44,f46,f0, f2)
268    STORE_JUMP(o0, f48, 41f)
2692: FREG_FROB(f34,f36,f38,f40,f42,f44,f46,f0, f2)
270    STORE_SYNC(o0, f48)
271    FREG_FROB(f2, f4, f6, f8, f10,f12,f14,f16,f18)
272    STORE_JUMP(o0, f48, 49f)
2733: FREG_FROB(f2, f4, f6, f8, f10,f12,f14,f16,f18)
274    STORE_SYNC(o0, f48)
275    FREG_FROB(f18,f20,f22,f24,f26,f28,f30,f32,f34)
276    STORE_JUMP(o0, f48, 57f)
277
2781: FREG_FROB(f4, f6, f8, f10,f12,f14,f16,f18,f20)
279    LOOP_CHUNK1(o1, o0, GLOBAL_SPARE, 1f)
280    FREG_FROB(f20,f22,f24,f26,f28,f30,f32,f34,f36)
281    LOOP_CHUNK2(o1, o0, GLOBAL_SPARE, 2f)
282    FREG_FROB(f36,f38,f40,f42,f44,f46,f0, f2, f4)
283    LOOP_CHUNK3(o1, o0, GLOBAL_SPARE, 3f)
284    ba,pt %xcc, 1b+4
285     faligndata %f4, %f6, %f48
2861: FREG_FROB(f20,f22,f24,f26,f28,f30,f32,f34,f36)
287    STORE_SYNC(o0, f48)
288    FREG_FROB(f36,f38,f40,f42,f44,f46,f0, f2, f4)
289    STORE_JUMP(o0, f48, 42f)
2902: FREG_FROB(f36,f38,f40,f42,f44,f46,f0, f2, f4)
291    STORE_SYNC(o0, f48)
292    FREG_FROB(f4, f6, f8, f10,f12,f14,f16,f18,f20)
293    STORE_JUMP(o0, f48, 50f)
2943: FREG_FROB(f4, f6, f8, f10,f12,f14,f16,f18,f20)
295    STORE_SYNC(o0, f48)
296    FREG_FROB(f20,f22,f24,f26,f28,f30,f32,f34,f36)
297    STORE_JUMP(o0, f48, 58f)
298
2991: FREG_FROB(f6, f8, f10,f12,f14,f16,f18,f20,f22)
300    LOOP_CHUNK1(o1, o0, GLOBAL_SPARE, 1f)
301    FREG_FROB(f22,f24,f26,f28,f30,f32,f34,f36,f38)
302    LOOP_CHUNK2(o1, o0, GLOBAL_SPARE, 2f)
303    FREG_FROB(f38,f40,f42,f44,f46,f0, f2, f4, f6)
304    LOOP_CHUNK3(o1, o0, GLOBAL_SPARE, 3f)
305    ba,pt %xcc, 1b+4
306     faligndata %f6, %f8, %f48
3071: FREG_FROB(f22,f24,f26,f28,f30,f32,f34,f36,f38)
308    STORE_SYNC(o0, f48)
309    FREG_FROB(f38,f40,f42,f44,f46,f0, f2, f4, f6)
310    STORE_JUMP(o0, f48, 43f)
3112: FREG_FROB(f38,f40,f42,f44,f46,f0, f2, f4, f6)
312    STORE_SYNC(o0, f48)
313    FREG_FROB(f6, f8, f10,f12,f14,f16,f18,f20,f22)
314    STORE_JUMP(o0, f48, 51f)
3153: FREG_FROB(f6, f8, f10,f12,f14,f16,f18,f20,f22)
316    STORE_SYNC(o0, f48)
317    FREG_FROB(f22,f24,f26,f28,f30,f32,f34,f36,f38)
318    STORE_JUMP(o0, f48, 59f)
319
3201: FREG_FROB(f8, f10,f12,f14,f16,f18,f20,f22,f24)
321    LOOP_CHUNK1(o1, o0, GLOBAL_SPARE, 1f)
322    FREG_FROB(f24,f26,f28,f30,f32,f34,f36,f38,f40)
323    LOOP_CHUNK2(o1, o0, GLOBAL_SPARE, 2f)
324    FREG_FROB(f40,f42,f44,f46,f0, f2, f4, f6, f8)
325    LOOP_CHUNK3(o1, o0, GLOBAL_SPARE, 3f)
326    ba,pt %xcc, 1b+4
327     faligndata %f8, %f10, %f48
3281: FREG_FROB(f24,f26,f28,f30,f32,f34,f36,f38,f40)
329    STORE_SYNC(o0, f48)
330    FREG_FROB(f40,f42,f44,f46,f0, f2, f4, f6, f8)
331    STORE_JUMP(o0, f48, 44f)
3322: FREG_FROB(f40,f42,f44,f46,f0, f2, f4, f6, f8)
333    STORE_SYNC(o0, f48)
334    FREG_FROB(f8, f10,f12,f14,f16,f18,f20,f22,f24)
335    STORE_JUMP(o0, f48, 52f)
3363: FREG_FROB(f8, f10,f12,f14,f16,f18,f20,f22,f24)
337    STORE_SYNC(o0, f48)
338    FREG_FROB(f24,f26,f28,f30,f32,f34,f36,f38,f40)
339    STORE_JUMP(o0, f48, 60f)
340
3411: FREG_FROB(f10,f12,f14,f16,f18,f20,f22,f24,f26)
342    LOOP_CHUNK1(o1, o0, GLOBAL_SPARE, 1f)
343    FREG_FROB(f26,f28,f30,f32,f34,f36,f38,f40,f42)
344    LOOP_CHUNK2(o1, o0, GLOBAL_SPARE, 2f)
345    FREG_FROB(f42,f44,f46,f0, f2, f4, f6, f8, f10)
346    LOOP_CHUNK3(o1, o0, GLOBAL_SPARE, 3f)
347    ba,pt %xcc, 1b+4
348     faligndata %f10, %f12, %f48
3491: FREG_FROB(f26,f28,f30,f32,f34,f36,f38,f40,f42)
350    STORE_SYNC(o0, f48)
351    FREG_FROB(f42,f44,f46,f0, f2, f4, f6, f8, f10)
352    STORE_JUMP(o0, f48, 45f)
3532: FREG_FROB(f42,f44,f46,f0, f2, f4, f6, f8, f10)
354    STORE_SYNC(o0, f48)
355    FREG_FROB(f10,f12,f14,f16,f18,f20,f22,f24,f26)
356    STORE_JUMP(o0, f48, 53f)
3573: FREG_FROB(f10,f12,f14,f16,f18,f20,f22,f24,f26)
358    STORE_SYNC(o0, f48)
359    FREG_FROB(f26,f28,f30,f32,f34,f36,f38,f40,f42)
360    STORE_JUMP(o0, f48, 61f)
361
3621: FREG_FROB(f12,f14,f16,f18,f20,f22,f24,f26,f28)
363    LOOP_CHUNK1(o1, o0, GLOBAL_SPARE, 1f)
364    FREG_FROB(f28,f30,f32,f34,f36,f38,f40,f42,f44)
365    LOOP_CHUNK2(o1, o0, GLOBAL_SPARE, 2f)
366    FREG_FROB(f44,f46,f0, f2, f4, f6, f8, f10,f12)
367    LOOP_CHUNK3(o1, o0, GLOBAL_SPARE, 3f)
368    ba,pt %xcc, 1b+4
369     faligndata %f12, %f14, %f48
3701: FREG_FROB(f28,f30,f32,f34,f36,f38,f40,f42,f44)
371    STORE_SYNC(o0, f48)
372    FREG_FROB(f44,f46,f0, f2, f4, f6, f8, f10,f12)
373    STORE_JUMP(o0, f48, 46f)
3742: FREG_FROB(f44,f46,f0, f2, f4, f6, f8, f10,f12)
375    STORE_SYNC(o0, f48)
376    FREG_FROB(f12,f14,f16,f18,f20,f22,f24,f26,f28)
377    STORE_JUMP(o0, f48, 54f)
3783: FREG_FROB(f12,f14,f16,f18,f20,f22,f24,f26,f28)
379    STORE_SYNC(o0, f48)
380    FREG_FROB(f28,f30,f32,f34,f36,f38,f40,f42,f44)
381    STORE_JUMP(o0, f48, 62f)
382
3831: FREG_FROB(f14,f16,f18,f20,f22,f24,f26,f28,f30)
384    LOOP_CHUNK1(o1, o0, GLOBAL_SPARE, 1f)
385    FREG_FROB(f30,f32,f34,f36,f38,f40,f42,f44,f46)
386    LOOP_CHUNK2(o1, o0, GLOBAL_SPARE, 2f)
387    FREG_FROB(f46,f0, f2, f4, f6, f8, f10,f12,f14)
388    LOOP_CHUNK3(o1, o0, GLOBAL_SPARE, 3f)
389    ba,pt %xcc, 1b+4
390     faligndata %f14, %f16, %f48
3911: FREG_FROB(f30,f32,f34,f36,f38,f40,f42,f44,f46)
392    STORE_SYNC(o0, f48)
393    FREG_FROB(f46,f0, f2, f4, f6, f8, f10,f12,f14)
394    STORE_JUMP(o0, f48, 47f)
3952: FREG_FROB(f46,f0, f2, f4, f6, f8, f10,f12,f14)
396    STORE_SYNC(o0, f48)
397    FREG_FROB(f14,f16,f18,f20,f22,f24,f26,f28,f30)
398    STORE_JUMP(o0, f48, 55f)
3993: FREG_FROB(f14,f16,f18,f20,f22,f24,f26,f28,f30)
400    STORE_SYNC(o0, f48)
401    FREG_FROB(f30,f32,f34,f36,f38,f40,f42,f44,f46)
402    STORE_JUMP(o0, f48, 63f)
403
40440: FINISH_VISCHUNK(o0, f0, f2, g3)
40541: FINISH_VISCHUNK(o0, f2, f4, g3)
40642: FINISH_VISCHUNK(o0, f4, f6, g3)
40743: FINISH_VISCHUNK(o0, f6, f8, g3)
40844: FINISH_VISCHUNK(o0, f8, f10, g3)
40945: FINISH_VISCHUNK(o0, f10, f12, g3)
41046: FINISH_VISCHUNK(o0, f12, f14, g3)
41147: UNEVEN_VISCHUNK(o0, f14, f0, g3)
41248: FINISH_VISCHUNK(o0, f16, f18, g3)
41349: FINISH_VISCHUNK(o0, f18, f20, g3)
41450: FINISH_VISCHUNK(o0, f20, f22, g3)
41551: FINISH_VISCHUNK(o0, f22, f24, g3)
41652: FINISH_VISCHUNK(o0, f24, f26, g3)
41753: FINISH_VISCHUNK(o0, f26, f28, g3)
41854: FINISH_VISCHUNK(o0, f28, f30, g3)
41955: UNEVEN_VISCHUNK(o0, f30, f0, g3)
42056: FINISH_VISCHUNK(o0, f32, f34, g3)
42157: FINISH_VISCHUNK(o0, f34, f36, g3)
42258: FINISH_VISCHUNK(o0, f36, f38, g3)
42359: FINISH_VISCHUNK(o0, f38, f40, g3)
42460: FINISH_VISCHUNK(o0, f40, f42, g3)
42561: FINISH_VISCHUNK(o0, f42, f44, g3)
42662: FINISH_VISCHUNK(o0, f44, f46, g3)
42763: UNEVEN_VISCHUNK_LAST(o0, f46, f0, g3)
428
42993: EX_LD(LOAD(ldd, %o1, %f2))
430    add %o1, 8, %o1
431    subcc %g3, 8, %g3
432    faligndata %f0, %f2, %f8
433    EX_ST(STORE(std, %f8, %o0))
434    bl,pn %xcc, 95f
435     add %o0, 8, %o0
436    EX_LD(LOAD(ldd, %o1, %f0))
437    add %o1, 8, %o1
438    subcc %g3, 8, %g3
439    faligndata %f2, %f0, %f8
440    EX_ST(STORE(std, %f8, %o0))
441    bge,pt %xcc, 93b
442     add %o0, 8, %o0
443
44495: brz,pt %o2, 2f
445     mov %g1, %o1
446
4471: EX_LD(LOAD(ldub, %o1, %o3))
448    add %o1, 1, %o1
449    subcc %o2, 1, %o2
450    EX_ST(STORE(stb, %o3, %o0))
451    bne,pt %xcc, 1b
452     add %o0, 1, %o0
453
4542: membar #StoreLoad | #StoreStore
455    VISExit
456    retl
457     mov EX_RETVAL(%o4), %o0
458
459    .align 64
46070: /* 16 < len <= (5 * 64) */
461    bne,pn %XCC, 75f
462     sub %o0, %o1, %o3
463
46472: andn %o2, 0xf, %GLOBAL_SPARE
465    and %o2, 0xf, %o2
4661: EX_LD(LOAD(ldx, %o1 + 0x00, %o5))
467    EX_LD(LOAD(ldx, %o1 + 0x08, %g1))
468    subcc %GLOBAL_SPARE, 0x10, %GLOBAL_SPARE
469    EX_ST(STORE(stx, %o5, %o1 + %o3))
470    add %o1, 0x8, %o1
471    EX_ST(STORE(stx, %g1, %o1 + %o3))
472    bgu,pt %XCC, 1b
473     add %o1, 0x8, %o1
47473: andcc %o2, 0x8, %g0
475    be,pt %XCC, 1f
476     nop
477    EX_LD(LOAD(ldx, %o1, %o5))
478    sub %o2, 0x8, %o2
479    EX_ST(STORE(stx, %o5, %o1 + %o3))
480    add %o1, 0x8, %o1
4811: andcc %o2, 0x4, %g0
482    be,pt %XCC, 1f
483     nop
484    EX_LD(LOAD(lduw, %o1, %o5))
485    sub %o2, 0x4, %o2
486    EX_ST(STORE(stw, %o5, %o1 + %o3))
487    add %o1, 0x4, %o1
4881: cmp %o2, 0
489    be,pt %XCC, 85f
490     nop
491    ba,pt %xcc, 90f
492     nop
493
49475: andcc %o0, 0x7, %g1
495    sub %g1, 0x8, %g1
496    be,pn %icc, 2f
497     sub %g0, %g1, %g1
498    sub %o2, %g1, %o2
499
5001: EX_LD(LOAD(ldub, %o1, %o5))
501    subcc %g1, 1, %g1
502    EX_ST(STORE(stb, %o5, %o1 + %o3))
503    bgu,pt %icc, 1b
504     add %o1, 1, %o1
505
5062: add %o1, %o3, %o0
507    andcc %o1, 0x7, %g1
508    bne,pt %icc, 8f
509     sll %g1, 3, %g1
510
511    cmp %o2, 16
512    bgeu,pt %icc, 72b
513     nop
514    ba,a,pt %xcc, 73b
515
5168: mov 64, %o3
517    andn %o1, 0x7, %o1
518    EX_LD(LOAD(ldx, %o1, %g2))
519    sub %o3, %g1, %o3
520    andn %o2, 0x7, %GLOBAL_SPARE
521    sllx %g2, %g1, %g2
5221: EX_LD(LOAD(ldx, %o1 + 0x8, %g3))
523    subcc %GLOBAL_SPARE, 0x8, %GLOBAL_SPARE
524    add %o1, 0x8, %o1
525    srlx %g3, %o3, %o5
526    or %o5, %g2, %o5
527    EX_ST(STORE(stx, %o5, %o0))
528    add %o0, 0x8, %o0
529    bgu,pt %icc, 1b
530     sllx %g3, %g1, %g2
531
532    srl %g1, 3, %g1
533    andcc %o2, 0x7, %o2
534    be,pn %icc, 85f
535     add %o1, %g1, %o1
536    ba,pt %xcc, 90f
537     sub %o0, %o1, %o3
538
539    .align 64
54080: /* 0 < len <= 16 */
541    andcc %o3, 0x3, %g0
542    bne,pn %XCC, 90f
543     sub %o0, %o1, %o3
544
5451: EX_LD(LOAD(lduw, %o1, %g1))
546    subcc %o2, 4, %o2
547    EX_ST(STORE(stw, %g1, %o1 + %o3))
548    bgu,pt %XCC, 1b
549     add %o1, 4, %o1
550
55185: retl
552     mov EX_RETVAL(%o4), %o0
553
554    .align 32
55590: EX_LD(LOAD(ldub, %o1, %g1))
556    subcc %o2, 1, %o2
557    EX_ST(STORE(stb, %g1, %o1 + %o3))
558    bgu,pt %XCC, 90b
559     add %o1, 1, %o1
560    retl
561     mov EX_RETVAL(%o4), %o0
562
563    .size FUNC_NAME, .-FUNC_NAME
564

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