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
|
/*
* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2008-2009 PetaLogix
* Copyright (C) 2008 Jim Law - Iris LP All rights reserved.
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file COPYING in the main directory of this
* archive for more details.
*
* Written by Jim Law <jlaw@irispower.com>
*
* intended to replace:
* memcpy in memcpy.c and
* memmove in memmove.c
* ... in arch/microblaze/lib
*
*
* assly_fastcopy.S
*
* Attempt at quicker memcpy and memmove for MicroBlaze
* Input : Operand1 in Reg r5 - destination address
* Operand2 in Reg r6 - source address
* Operand3 in Reg r7 - number of bytes to transfer
* Output: Result in Reg r3 - starting destinaition address
*
*
* Explanation:
* Perform (possibly unaligned) copy of a block of memory
* between mem locations with size of xfer spec'd in bytes
*/
.globl memmove
.type memmove, @function
.ent memmove
#ifdef __MICROBLAZEEL__
#define BSLLI bsrli
#define BSRLI bslli
#else
#define BSLLI bslli
#define BSRLI bsrli
#endif
memmove:
cmpu r4, r5, r6 /* n = s - d */
bgei r4, HIDDEN_JUMPTARGET(memcpy)
fast_memcpy_descending:
/* move d to return register as value of function */
addi r3, r5, 0
add r5, r5, r7 /* d = d + c */
add r6, r6, r7 /* s = s + c */
addi r4, r0, 4 /* n = 4 */
cmpu r4, r4, r7 /* n = c - n (unsigned) */
blti r4,d_xfer_end /* if n < 0, less than one word to transfer */
/* transfer first 0~3 bytes to get aligned dest address */
andi r4, r5, 3 /* n = d & 3 */
/* if zero, destination already aligned */
beqi r4,d_dalign_done
rsub r7, r4, r7 /* c = c - n adjust c */
d_xfer_first_loop:
/* if no bytes left to transfer, transfer the bulk */
beqi r4,d_dalign_done
addi r6, r6, -1 /* s-- */
addi r5, r5, -1 /* d-- */
lbui r11, r6, 0 /* h = *s */
sbi r11, r5, 0 /* *d = h */
brid d_xfer_first_loop /* loop */
addi r4, r4, -1 /* n-- (IN DELAY SLOT) */
d_dalign_done:
addi r4, r0, 32 /* n = 32 */
cmpu r4, r4, r7 /* n = c - n (unsigned) */
/* if n < 0, less than one block to transfer */
blti r4, d_block_done
d_block_xfer:
andi r4, r7, 0xffffffe0 /* n = c & ~31 */
rsub r7, r4, r7 /* c = c - n */
andi r9, r6, 3 /* t1 = s & 3 */
/* if temp != 0, unaligned transfers needed */
bnei r9, d_block_unaligned
d_block_aligned:
addi r6, r6, -32 /* s = s - 32 */
addi r5, r5, -32 /* d = d - 32 */
lwi r9, r6, 28 /* t1 = *(s + 28) */
lwi r10, r6, 24 /* t2 = *(s + 24) */
lwi r11, r6, 20 /* t3 = *(s + 20) */
lwi r12, r6, 16 /* t4 = *(s + 16) */
swi r9, r5, 28 /* *(d + 28) = t1 */
swi r10, r5, 24 /* *(d + 24) = t2 */
swi r11, r5, 20 /* *(d + 20) = t3 */
swi r12, r5, 16 /* *(d + 16) = t4 */
lwi r9, r6, 12 /* t1 = *(s + 12) */
lwi r10, r6, 8 /* t2 = *(s + 8) */
lwi r11, r6, 4 /* t3 = *(s + 4) */
lwi r12, r6, 0 /* t4 = *(s + 0) */
swi r9, r5, 12 /* *(d + 12) = t1 */
swi r10, r5, 8 /* *(d + 8) = t2 */
swi r11, r5, 4 /* *(d + 4) = t3 */
addi r4, r4, -32 /* n = n - 32 */
bneid r4, d_block_aligned /* while (n) loop */
swi r12, r5, 0 /* *(d + 0) = t4 (IN DELAY SLOT) */
bri d_block_done
d_block_unaligned:
andi r8, r6, 0xfffffffc /* as = s & ~3 */
rsub r6, r4, r6 /* s = s - n */
lwi r11, r8, 0 /* h = *(as + 0) */
addi r9, r9, -1
beqi r9,d_block_u1 /* t1 was 1 => 1 byte offset */
addi r9, r9, -1
beqi r9,d_block_u2 /* t1 was 2 => 2 byte offset */
d_block_u3:
BSRLI r11, r11, 8 /* h = h >> 8 */
d_bu3_loop:
addi r8, r8, -32 /* as = as - 32 */
addi r5, r5, -32 /* d = d - 32 */
lwi r12, r8, 28 /* v = *(as + 28) */
BSLLI r9, r12, 24 /* t1 = v << 24 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 28 /* *(d + 28) = t1 */
BSRLI r11, r12, 8 /* h = v >> 8 */
lwi r12, r8, 24 /* v = *(as + 24) */
BSLLI r9, r12, 24 /* t1 = v << 24 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 24 /* *(d + 24) = t1 */
BSRLI r11, r12, 8 /* h = v >> 8 */
lwi r12, r8, 20 /* v = *(as + 20) */
BSLLI r9, r12, 24 /* t1 = v << 24 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 20 /* *(d + 20) = t1 */
BSRLI r11, r12, 8 /* h = v >> 8 */
lwi r12, r8, 16 /* v = *(as + 16) */
BSLLI r9, r12, 24 /* t1 = v << 24 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 16 /* *(d + 16) = t1 */
BSRLI r11, r12, 8 /* h = v >> 8 */
lwi r12, r8, 12 /* v = *(as + 12) */
BSLLI r9, r12, 24 /* t1 = v << 24 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 12 /* *(d + 112) = t1 */
BSRLI r11, r12, 8 /* h = v >> 8 */
lwi r12, r8, 8 /* v = *(as + 8) */
BSLLI r9, r12, 24 /* t1 = v << 24 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 8 /* *(d + 8) = t1 */
BSRLI r11, r12, 8 /* h = v >> 8 */
lwi r12, r8, 4 /* v = *(as + 4) */
BSLLI r9, r12, 24 /* t1 = v << 24 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 4 /* *(d + 4) = t1 */
BSRLI r11, r12, 8 /* h = v >> 8 */
lwi r12, r8, 0 /* v = *(as + 0) */
BSLLI r9, r12, 24 /* t1 = v << 24 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 0 /* *(d + 0) = t1 */
addi r4, r4, -32 /* n = n - 32 */
bneid r4, d_bu3_loop /* while (n) loop */
BSRLI r11, r12, 8 /* h = v >> 8 (IN DELAY SLOT) */
bri d_block_done
d_block_u1:
BSRLI r11, r11, 24 /* h = h >> 24 */
d_bu1_loop:
addi r8, r8, -32 /* as = as - 32 */
addi r5, r5, -32 /* d = d - 32 */
lwi r12, r8, 28 /* v = *(as + 28) */
BSLLI r9, r12, 8 /* t1 = v << 8 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 28 /* *(d + 28) = t1 */
BSRLI r11, r12, 24 /* h = v >> 24 */
lwi r12, r8, 24 /* v = *(as + 24) */
BSLLI r9, r12, 8 /* t1 = v << 8 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 24 /* *(d + 24) = t1 */
BSRLI r11, r12, 24 /* h = v >> 24 */
lwi r12, r8, 20 /* v = *(as + 20) */
BSLLI r9, r12, 8 /* t1 = v << 8 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 20 /* *(d + 20) = t1 */
BSRLI r11, r12, 24 /* h = v >> 24 */
lwi r12, r8, 16 /* v = *(as + 16) */
BSLLI r9, r12, 8 /* t1 = v << 8 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 16 /* *(d + 16) = t1 */
BSRLI r11, r12, 24 /* h = v >> 24 */
lwi r12, r8, 12 /* v = *(as + 12) */
BSLLI r9, r12, 8 /* t1 = v << 8 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 12 /* *(d + 112) = t1 */
BSRLI r11, r12, 24 /* h = v >> 24 */
lwi r12, r8, 8 /* v = *(as + 8) */
BSLLI r9, r12, 8 /* t1 = v << 8 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 8 /* *(d + 8) = t1 */
BSRLI r11, r12, 24 /* h = v >> 24 */
lwi r12, r8, 4 /* v = *(as + 4) */
BSLLI r9, r12, 8 /* t1 = v << 8 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 4 /* *(d + 4) = t1 */
BSRLI r11, r12, 24 /* h = v >> 24 */
lwi r12, r8, 0 /* v = *(as + 0) */
BSLLI r9, r12, 8 /* t1 = v << 8 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 0 /* *(d + 0) = t1 */
addi r4, r4, -32 /* n = n - 32 */
bneid r4, d_bu1_loop /* while (n) loop */
BSRLI r11, r12, 24 /* h = v >> 24 (IN DELAY SLOT) */
bri d_block_done
d_block_u2:
BSRLI r11, r11, 16 /* h = h >> 16 */
d_bu2_loop:
addi r8, r8, -32 /* as = as - 32 */
addi r5, r5, -32 /* d = d - 32 */
lwi r12, r8, 28 /* v = *(as + 28) */
BSLLI r9, r12, 16 /* t1 = v << 16 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 28 /* *(d + 28) = t1 */
BSRLI r11, r12, 16 /* h = v >> 16 */
lwi r12, r8, 24 /* v = *(as + 24) */
BSLLI r9, r12, 16 /* t1 = v << 16 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 24 /* *(d + 24) = t1 */
BSRLI r11, r12, 16 /* h = v >> 16 */
lwi r12, r8, 20 /* v = *(as + 20) */
BSLLI r9, r12, 16 /* t1 = v << 16 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 20 /* *(d + 20) = t1 */
BSRLI r11, r12, 16 /* h = v >> 16 */
lwi r12, r8, 16 /* v = *(as + 16) */
BSLLI r9, r12, 16 /* t1 = v << 16 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 16 /* *(d + 16) = t1 */
BSRLI r11, r12, 16 /* h = v >> 16 */
lwi r12, r8, 12 /* v = *(as + 12) */
BSLLI r9, r12, 16 /* t1 = v << 16 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 12 /* *(d + 112) = t1 */
BSRLI r11, r12, 16 /* h = v >> 16 */
lwi r12, r8, 8 /* v = *(as + 8) */
BSLLI r9, r12, 16 /* t1 = v << 16 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 8 /* *(d + 8) = t1 */
BSRLI r11, r12, 16 /* h = v >> 16 */
lwi r12, r8, 4 /* v = *(as + 4) */
BSLLI r9, r12, 16 /* t1 = v << 16 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 4 /* *(d + 4) = t1 */
BSRLI r11, r12, 16 /* h = v >> 16 */
lwi r12, r8, 0 /* v = *(as + 0) */
BSLLI r9, r12, 16 /* t1 = v << 16 */
or r9, r11, r9 /* t1 = h | t1 */
swi r9, r5, 0 /* *(d + 0) = t1 */
addi r4, r4, -32 /* n = n - 32 */
bneid r4, d_bu2_loop /* while (n) loop */
BSRLI r11, r12, 16 /* h = v >> 16 (IN DELAY SLOT) */
d_block_done:
addi r4, r0, 4 /* n = 4 */
cmpu r4, r4, r7 /* n = c - n (unsigned) */
blti r4,d_xfer_end /* if n < 0, less than one word to transfer */
d_word_xfer:
andi r4, r7, 0xfffffffc /* n = c & ~3 */
rsub r5, r4, r5 /* d = d - n */
rsub r6, r4, r6 /* s = s - n */
rsub r7, r4, r7 /* c = c - n */
andi r9, r6, 3 /* t1 = s & 3 */
/* if temp != 0, unaligned transfers needed */
bnei r9, d_word_unaligned
d_word_aligned:
addi r4, r4,-4 /* n-- */
lw r9, r6, r4 /* t1 = *(s+n) */
bneid r4, d_word_aligned /* loop */
sw r9, r5, r4 /* *(d+n) = t1 (IN DELAY SLOT) */
bri d_word_done
d_word_unaligned:
andi r8, r6, 0xfffffffc /* as = s & ~3 */
lw r11, r8, r4 /* h = *(as + n) */
addi r9, r9, -1
beqi r9,d_word_u1 /* t1 was 1 => 1 byte offset */
addi r9, r9, -1
beqi r9,d_word_u2 /* t1 was 2 => 2 byte offset */
d_word_u3:
BSRLI r11, r11, 8 /* h = h >> 8 */
d_wu3_loop:
addi r4, r4,-4 /* n = n - 4 */
lw r12, r8, r4 /* v = *(as + n) */
BSLLI r9, r12, 24 /* t1 = v << 24 */
or r9, r11, r9 /* t1 = h | t1 */
sw r9, r5, r4 /* *(d + n) = t1 */
bneid r4, d_wu3_loop /* while (n) loop */
BSRLI r11, r12, 8 /* h = v >> 8 (IN DELAY SLOT) */
bri d_word_done
d_word_u1:
BSRLI r11, r11, 24 /* h = h >> 24 */
d_wu1_loop:
addi r4, r4,-4 /* n = n - 4 */
lw r12, r8, r4 /* v = *(as + n) */
BSLLI r9, r12, 8 /* t1 = v << 8 */
or r9, r11, r9 /* t1 = h | t1 */
sw r9, r5, r4 /* *(d + n) = t1 */
bneid r4, d_wu1_loop /* while (n) loop */
BSRLI r11, r12, 24 /* h = v >> 24 (IN DELAY SLOT) */
bri d_word_done
d_word_u2:
BSRLI r11, r11, 16 /* h = h >> 16 */
d_wu2_loop:
addi r4, r4,-4 /* n = n - 4 */
lw r12, r8, r4 /* v = *(as + n) */
BSLLI r9, r12, 16 /* t1 = v << 16 */
or r9, r11, r9 /* t1 = h | t1 */
sw r9, r5, r4 /* *(d + n) = t1 */
bneid r4, d_wu2_loop /* while (n) loop */
BSRLI r11, r12, 16 /* h = v >> 16 (IN DELAY SLOT) */
d_word_done:
d_xfer_end:
d_xfer_end_loop:
beqi r7, a_done /* while (c) */
addi r6, r6, -1 /* s-- */
lbui r9, r6, 0 /* t1 = *s */
addi r5, r5, -1 /* d-- */
sbi r9, r5, 0 /* *d = t1 */
brid d_xfer_end_loop /* loop */
addi r7, r7, -1 /* c-- (IN DELAY SLOT) */
a_done:
d_done:
rtsd r15, 8
nop
.size memmove, . - memmove
.end memmove
libc_hidden_def(memmove)
|
