diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm26/lib/memcpy.S |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/arm26/lib/memcpy.S')
-rw-r--r-- | arch/arm26/lib/memcpy.S | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/arch/arm26/lib/memcpy.S b/arch/arm26/lib/memcpy.S new file mode 100644 index 000000000000..3f719e412069 --- /dev/null +++ b/arch/arm26/lib/memcpy.S | |||
@@ -0,0 +1,318 @@ | |||
1 | /* | ||
2 | * linux/arch/arm26/lib/memcpy.S | ||
3 | * | ||
4 | * Copyright (C) 1995-1999 Russell King | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License version 2 as | ||
8 | * published by the Free Software Foundation. | ||
9 | * | ||
10 | * ASM optimised string functions | ||
11 | */ | ||
12 | #include <linux/linkage.h> | ||
13 | #include <asm/assembler.h> | ||
14 | |||
15 | .text | ||
16 | |||
17 | #define ENTER \ | ||
18 | mov ip,sp ;\ | ||
19 | stmfd sp!,{r4-r9,fp,ip,lr,pc} ;\ | ||
20 | sub fp,ip,#4 | ||
21 | |||
22 | #define EXIT \ | ||
23 | LOADREGS(ea, fp, {r4 - r9, fp, sp, pc}) | ||
24 | |||
25 | #define EXITEQ \ | ||
26 | LOADREGS(eqea, fp, {r4 - r9, fp, sp, pc}) | ||
27 | |||
28 | /* | ||
29 | * Prototype: void memcpy(void *to,const void *from,unsigned long n); | ||
30 | * ARM3: cant use memcopy here!!! | ||
31 | */ | ||
32 | ENTRY(memcpy) | ||
33 | ENTRY(memmove) | ||
34 | ENTER | ||
35 | cmp r1, r0 | ||
36 | bcc 19f | ||
37 | subs r2, r2, #4 | ||
38 | blt 6f | ||
39 | ands ip, r0, #3 | ||
40 | bne 7f | ||
41 | ands ip, r1, #3 | ||
42 | bne 8f | ||
43 | |||
44 | 1: subs r2, r2, #8 | ||
45 | blt 5f | ||
46 | subs r2, r2, #0x14 | ||
47 | blt 3f | ||
48 | 2: ldmia r1!,{r3 - r9, ip} | ||
49 | stmia r0!,{r3 - r9, ip} | ||
50 | subs r2, r2, #32 | ||
51 | bge 2b | ||
52 | cmn r2, #16 | ||
53 | ldmgeia r1!, {r3 - r6} | ||
54 | stmgeia r0!, {r3 - r6} | ||
55 | subge r2, r2, #0x10 | ||
56 | 3: adds r2, r2, #0x14 | ||
57 | 4: ldmgeia r1!, {r3 - r5} | ||
58 | stmgeia r0!, {r3 - r5} | ||
59 | subges r2, r2, #12 | ||
60 | bge 4b | ||
61 | 5: adds r2, r2, #8 | ||
62 | blt 6f | ||
63 | subs r2, r2, #4 | ||
64 | ldrlt r3, [r1], #4 | ||
65 | ldmgeia r1!, {r4, r5} | ||
66 | strlt r3, [r0], #4 | ||
67 | stmgeia r0!, {r4, r5} | ||
68 | subge r2, r2, #4 | ||
69 | |||
70 | 6: adds r2, r2, #4 | ||
71 | EXITEQ | ||
72 | cmp r2, #2 | ||
73 | ldrb r3, [r1], #1 | ||
74 | ldrgeb r4, [r1], #1 | ||
75 | ldrgtb r5, [r1], #1 | ||
76 | strb r3, [r0], #1 | ||
77 | strgeb r4, [r0], #1 | ||
78 | strgtb r5, [r0], #1 | ||
79 | EXIT | ||
80 | |||
81 | 7: rsb ip, ip, #4 | ||
82 | cmp ip, #2 | ||
83 | ldrb r3, [r1], #1 | ||
84 | ldrgeb r4, [r1], #1 | ||
85 | ldrgtb r5, [r1], #1 | ||
86 | strb r3, [r0], #1 | ||
87 | strgeb r4, [r0], #1 | ||
88 | strgtb r5, [r0], #1 | ||
89 | subs r2, r2, ip | ||
90 | blt 6b | ||
91 | ands ip, r1, #3 | ||
92 | beq 1b | ||
93 | |||
94 | 8: bic r1, r1, #3 | ||
95 | ldr r7, [r1], #4 | ||
96 | cmp ip, #2 | ||
97 | bgt 15f | ||
98 | beq 11f | ||
99 | cmp r2, #12 | ||
100 | blt 10f | ||
101 | sub r2, r2, #12 | ||
102 | 9: mov r3, r7, pull #8 | ||
103 | ldmia r1!, {r4 - r7} | ||
104 | orr r3, r3, r4, push #24 | ||
105 | mov r4, r4, pull #8 | ||
106 | orr r4, r4, r5, push #24 | ||
107 | mov r5, r5, pull #8 | ||
108 | orr r5, r5, r6, push #24 | ||
109 | mov r6, r6, pull #8 | ||
110 | orr r6, r6, r7, push #24 | ||
111 | stmia r0!, {r3 - r6} | ||
112 | subs r2, r2, #16 | ||
113 | bge 9b | ||
114 | adds r2, r2, #12 | ||
115 | blt 100f | ||
116 | 10: mov r3, r7, pull #8 | ||
117 | ldr r7, [r1], #4 | ||
118 | subs r2, r2, #4 | ||
119 | orr r3, r3, r7, push #24 | ||
120 | str r3, [r0], #4 | ||
121 | bge 10b | ||
122 | 100: sub r1, r1, #3 | ||
123 | b 6b | ||
124 | |||
125 | 11: cmp r2, #12 | ||
126 | blt 13f /* */ | ||
127 | sub r2, r2, #12 | ||
128 | 12: mov r3, r7, pull #16 | ||
129 | ldmia r1!, {r4 - r7} | ||
130 | orr r3, r3, r4, push #16 | ||
131 | mov r4, r4, pull #16 | ||
132 | orr r4, r4, r5, push #16 | ||
133 | mov r5, r5, pull #16 | ||
134 | orr r5, r5, r6, push #16 | ||
135 | mov r6, r6, pull #16 | ||
136 | orr r6, r6, r7, push #16 | ||
137 | stmia r0!, {r3 - r6} | ||
138 | subs r2, r2, #16 | ||
139 | bge 12b | ||
140 | adds r2, r2, #12 | ||
141 | blt 14f | ||
142 | 13: mov r3, r7, pull #16 | ||
143 | ldr r7, [r1], #4 | ||
144 | subs r2, r2, #4 | ||
145 | orr r3, r3, r7, push #16 | ||
146 | str r3, [r0], #4 | ||
147 | bge 13b | ||
148 | 14: sub r1, r1, #2 | ||
149 | b 6b | ||
150 | |||
151 | 15: cmp r2, #12 | ||
152 | blt 17f | ||
153 | sub r2, r2, #12 | ||
154 | 16: mov r3, r7, pull #24 | ||
155 | ldmia r1!, {r4 - r7} | ||
156 | orr r3, r3, r4, push #8 | ||
157 | mov r4, r4, pull #24 | ||
158 | orr r4, r4, r5, push #8 | ||
159 | mov r5, r5, pull #24 | ||
160 | orr r5, r5, r6, push #8 | ||
161 | mov r6, r6, pull #24 | ||
162 | orr r6, r6, r7, push #8 | ||
163 | stmia r0!, {r3 - r6} | ||
164 | subs r2, r2, #16 | ||
165 | bge 16b | ||
166 | adds r2, r2, #12 | ||
167 | blt 18f | ||
168 | 17: mov r3, r7, pull #24 | ||
169 | ldr r7, [r1], #4 | ||
170 | subs r2, r2, #4 | ||
171 | orr r3, r3, r7, push #8 | ||
172 | str r3, [r0], #4 | ||
173 | bge 17b | ||
174 | 18: sub r1, r1, #1 | ||
175 | b 6b | ||
176 | |||
177 | |||
178 | 19: add r1, r1, r2 | ||
179 | add r0, r0, r2 | ||
180 | subs r2, r2, #4 | ||
181 | blt 24f | ||
182 | ands ip, r0, #3 | ||
183 | bne 25f | ||
184 | ands ip, r1, #3 | ||
185 | bne 26f | ||
186 | |||
187 | 20: subs r2, r2, #8 | ||
188 | blt 23f | ||
189 | subs r2, r2, #0x14 | ||
190 | blt 22f | ||
191 | 21: ldmdb r1!, {r3 - r9, ip} | ||
192 | stmdb r0!, {r3 - r9, ip} | ||
193 | subs r2, r2, #32 | ||
194 | bge 21b | ||
195 | 22: cmn r2, #16 | ||
196 | ldmgedb r1!, {r3 - r6} | ||
197 | stmgedb r0!, {r3 - r6} | ||
198 | subge r2, r2, #16 | ||
199 | adds r2, r2, #20 | ||
200 | ldmgedb r1!, {r3 - r5} | ||
201 | stmgedb r0!, {r3 - r5} | ||
202 | subge r2, r2, #12 | ||
203 | 23: adds r2, r2, #8 | ||
204 | blt 24f | ||
205 | subs r2, r2, #4 | ||
206 | ldrlt r3, [r1, #-4]! | ||
207 | ldmgedb r1!, {r4, r5} | ||
208 | strlt r3, [r0, #-4]! | ||
209 | stmgedb r0!, {r4, r5} | ||
210 | subge r2, r2, #4 | ||
211 | |||
212 | 24: adds r2, r2, #4 | ||
213 | EXITEQ | ||
214 | cmp r2, #2 | ||
215 | ldrb r3, [r1, #-1]! | ||
216 | ldrgeb r4, [r1, #-1]! | ||
217 | ldrgtb r5, [r1, #-1]! | ||
218 | strb r3, [r0, #-1]! | ||
219 | strgeb r4, [r0, #-1]! | ||
220 | strgtb r5, [r0, #-1]! | ||
221 | EXIT | ||
222 | |||
223 | 25: cmp ip, #2 | ||
224 | ldrb r3, [r1, #-1]! | ||
225 | ldrgeb r4, [r1, #-1]! | ||
226 | ldrgtb r5, [r1, #-1]! | ||
227 | strb r3, [r0, #-1]! | ||
228 | strgeb r4, [r0, #-1]! | ||
229 | strgtb r5, [r0, #-1]! | ||
230 | subs r2, r2, ip | ||
231 | blt 24b | ||
232 | ands ip, r1, #3 | ||
233 | beq 20b | ||
234 | |||
235 | 26: bic r1, r1, #3 | ||
236 | ldr r3, [r1], #0 | ||
237 | cmp ip, #2 | ||
238 | blt 34f | ||
239 | beq 30f | ||
240 | cmp r2, #12 | ||
241 | blt 28f | ||
242 | sub r2, r2, #12 | ||
243 | 27: mov r7, r3, push #8 | ||
244 | ldmdb r1!, {r3, r4, r5, r6} | ||
245 | orr r7, r7, r6, pull #24 | ||
246 | mov r6, r6, push #8 | ||
247 | orr r6, r6, r5, pull #24 | ||
248 | mov r5, r5, push #8 | ||
249 | orr r5, r5, r4, pull #24 | ||
250 | mov r4, r4, push #8 | ||
251 | orr r4, r4, r3, pull #24 | ||
252 | stmdb r0!, {r4, r5, r6, r7} | ||
253 | subs r2, r2, #16 | ||
254 | bge 27b | ||
255 | adds r2, r2, #12 | ||
256 | blt 29f | ||
257 | 28: mov ip, r3, push #8 | ||
258 | ldr r3, [r1, #-4]! | ||
259 | subs r2, r2, #4 | ||
260 | orr ip, ip, r3, pull #24 | ||
261 | str ip, [r0, #-4]! | ||
262 | bge 28b | ||
263 | 29: add r1, r1, #3 | ||
264 | b 24b | ||
265 | |||
266 | 30: cmp r2, #12 | ||
267 | blt 32f | ||
268 | sub r2, r2, #12 | ||
269 | 31: mov r7, r3, push #16 | ||
270 | ldmdb r1!, {r3, r4, r5, r6} | ||
271 | orr r7, r7, r6, pull #16 | ||
272 | mov r6, r6, push #16 | ||
273 | orr r6, r6, r5, pull #16 | ||
274 | mov r5, r5, push #16 | ||
275 | orr r5, r5, r4, pull #16 | ||
276 | mov r4, r4, push #16 | ||
277 | orr r4, r4, r3, pull #16 | ||
278 | stmdb r0!, {r4, r5, r6, r7} | ||
279 | subs r2, r2, #16 | ||
280 | bge 31b | ||
281 | adds r2, r2, #12 | ||
282 | blt 33f | ||
283 | 32: mov ip, r3, push #16 | ||
284 | ldr r3, [r1, #-4]! | ||
285 | subs r2, r2, #4 | ||
286 | orr ip, ip, r3, pull #16 | ||
287 | str ip, [r0, #-4]! | ||
288 | bge 32b | ||
289 | 33: add r1, r1, #2 | ||
290 | b 24b | ||
291 | |||
292 | 34: cmp r2, #12 | ||
293 | blt 36f | ||
294 | sub r2, r2, #12 | ||
295 | 35: mov r7, r3, push #24 | ||
296 | ldmdb r1!, {r3, r4, r5, r6} | ||
297 | orr r7, r7, r6, pull #8 | ||
298 | mov r6, r6, push #24 | ||
299 | orr r6, r6, r5, pull #8 | ||
300 | mov r5, r5, push #24 | ||
301 | orr r5, r5, r4, pull #8 | ||
302 | mov r4, r4, push #24 | ||
303 | orr r4, r4, r3, pull #8 | ||
304 | stmdb r0!, {r4, r5, r6, r7} | ||
305 | subs r2, r2, #16 | ||
306 | bge 35b | ||
307 | adds r2, r2, #12 | ||
308 | blt 37f | ||
309 | 36: mov ip, r3, push #24 | ||
310 | ldr r3, [r1, #-4]! | ||
311 | subs r2, r2, #4 | ||
312 | orr ip, ip, r3, pull #8 | ||
313 | str ip, [r0, #-4]! | ||
314 | bge 36b | ||
315 | 37: add r1, r1, #1 | ||
316 | b 24b | ||
317 | |||
318 | .align | ||