xref: /freebsd/lib/libc/arm/string/memcpy.S (revision c1d255d3) 
1/*	$NetBSD: memcpy_xscale.S,v 1.1 2003/10/14 07:51:45 scw Exp $	*/
2
3/*
4 * Copyright 2003 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Steve C. Woodford for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *      This product includes software developed for the NetBSD Project by
20 *      Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 *    or promote products derived from this software without specific prior
23 *    written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <machine/asm.h>
39__FBSDID("$FreeBSD$");
40
41.syntax	unified
42
43/* LINTSTUB: Func: void *memcpy(void *dst, const void *src, size_t len) */
44ENTRY(memcpy)
45	pld	[r1]
46	cmp	r2, #0x0c
47	ble	.Lmemcpy_short		/* <= 12 bytes */
48	mov	r3, r0			/* We must not clobber r0 */
49
50	/* Word-align the destination buffer */
51	ands	ip, r3, #0x03		/* Already word aligned? */
52	beq	.Lmemcpy_wordaligned	/* Yup */
53	cmp	ip, #0x02
54	ldrb	ip, [r1], #0x01
55	sub	r2, r2, #0x01
56	strb	ip, [r3], #0x01
57	ldrble	ip, [r1], #0x01
58	suble	r2, r2, #0x01
59	strble	ip, [r3], #0x01
60	ldrblt	ip, [r1], #0x01
61	sublt	r2, r2, #0x01
62	strblt	ip, [r3], #0x01
63
64	/* Destination buffer is now word aligned */
65.Lmemcpy_wordaligned:
66	ands	ip, r1, #0x03		/* Is src also word-aligned? */
67	bne	.Lmemcpy_bad_align	/* Nope. Things just got bad */
68
69	/* Quad-align the destination buffer */
70	tst	r3, #0x07		/* Already quad aligned? */
71	ldrne	ip, [r1], #0x04
72	stmfd	sp!, {r4-r9}		/* Free up some registers */
73	subne	r2, r2, #0x04
74	strne	ip, [r3], #0x04
75
76	/* Destination buffer quad aligned, source is at least word aligned */
77	subs	r2, r2, #0x80
78	blt	.Lmemcpy_w_lessthan128
79
80	/* Copy 128 bytes at a time */
81.Lmemcpy_w_loop128:
82	ldr	r4, [r1], #0x04		/* LD:00-03 */
83	ldr	r5, [r1], #0x04		/* LD:04-07 */
84	pld	[r1, #0x18]		/* Prefetch 0x20 */
85	ldr	r6, [r1], #0x04		/* LD:08-0b */
86	ldr	r7, [r1], #0x04		/* LD:0c-0f */
87	ldr	r8, [r1], #0x04		/* LD:10-13 */
88	ldr	r9, [r1], #0x04		/* LD:14-17 */
89	strd	r4, [r3], #0x08		/* ST:00-07 */
90	ldr	r4, [r1], #0x04		/* LD:18-1b */
91	ldr	r5, [r1], #0x04		/* LD:1c-1f */
92	strd	r6, [r3], #0x08		/* ST:08-0f */
93	ldr	r6, [r1], #0x04		/* LD:20-23 */
94	ldr	r7, [r1], #0x04		/* LD:24-27 */
95	pld	[r1, #0x18]		/* Prefetch 0x40 */
96	strd	r8, [r3], #0x08		/* ST:10-17 */
97	ldr	r8, [r1], #0x04		/* LD:28-2b */
98	ldr	r9, [r1], #0x04		/* LD:2c-2f */
99	strd	r4, [r3], #0x08		/* ST:18-1f */
100	ldr	r4, [r1], #0x04		/* LD:30-33 */
101	ldr	r5, [r1], #0x04		/* LD:34-37 */
102	strd	r6, [r3], #0x08		/* ST:20-27 */
103	ldr	r6, [r1], #0x04		/* LD:38-3b */
104	ldr	r7, [r1], #0x04		/* LD:3c-3f */
105	strd	r8, [r3], #0x08		/* ST:28-2f */
106	ldr	r8, [r1], #0x04		/* LD:40-43 */
107	ldr	r9, [r1], #0x04		/* LD:44-47 */
108	pld	[r1, #0x18]		/* Prefetch 0x60 */
109	strd	r4, [r3], #0x08		/* ST:30-37 */
110	ldr	r4, [r1], #0x04		/* LD:48-4b */
111	ldr	r5, [r1], #0x04		/* LD:4c-4f */
112	strd	r6, [r3], #0x08		/* ST:38-3f */
113	ldr	r6, [r1], #0x04		/* LD:50-53 */
114	ldr	r7, [r1], #0x04		/* LD:54-57 */
115	strd	r8, [r3], #0x08		/* ST:40-47 */
116	ldr	r8, [r1], #0x04		/* LD:58-5b */
117	ldr	r9, [r1], #0x04		/* LD:5c-5f */
118	strd	r4, [r3], #0x08		/* ST:48-4f */
119	ldr	r4, [r1], #0x04		/* LD:60-63 */
120	ldr	r5, [r1], #0x04		/* LD:64-67 */
121	pld	[r1, #0x18]		/* Prefetch 0x80 */
122	strd	r6, [r3], #0x08		/* ST:50-57 */
123	ldr	r6, [r1], #0x04		/* LD:68-6b */
124	ldr	r7, [r1], #0x04		/* LD:6c-6f */
125	strd	r8, [r3], #0x08		/* ST:58-5f */
126	ldr	r8, [r1], #0x04		/* LD:70-73 */
127	ldr	r9, [r1], #0x04		/* LD:74-77 */
128	strd	r4, [r3], #0x08		/* ST:60-67 */
129	ldr	r4, [r1], #0x04		/* LD:78-7b */
130	ldr	r5, [r1], #0x04		/* LD:7c-7f */
131	strd	r6, [r3], #0x08		/* ST:68-6f */
132	strd	r8, [r3], #0x08		/* ST:70-77 */
133	subs	r2, r2, #0x80
134	strd	r4, [r3], #0x08		/* ST:78-7f */
135	bge	.Lmemcpy_w_loop128
136
137.Lmemcpy_w_lessthan128:
138	adds	r2, r2, #0x80		/* Adjust for extra sub */
139	ldmfdeq	sp!, {r4-r9}
140	bxeq	lr			/* Return now if done */
141	subs	r2, r2, #0x20
142	blt	.Lmemcpy_w_lessthan32
143
144	/* Copy 32 bytes at a time */
145.Lmemcpy_w_loop32:
146	ldr	r4, [r1], #0x04
147	ldr	r5, [r1], #0x04
148	pld	[r1, #0x18]
149	ldr	r6, [r1], #0x04
150	ldr	r7, [r1], #0x04
151	ldr	r8, [r1], #0x04
152	ldr	r9, [r1], #0x04
153	strd	r4, [r3], #0x08
154	ldr	r4, [r1], #0x04
155	ldr	r5, [r1], #0x04
156	strd	r6, [r3], #0x08
157	strd	r8, [r3], #0x08
158	subs	r2, r2, #0x20
159	strd	r4, [r3], #0x08
160	bge	.Lmemcpy_w_loop32
161
162.Lmemcpy_w_lessthan32:
163	adds	r2, r2, #0x20		/* Adjust for extra sub */
164	ldmfdeq	sp!, {r4-r9}
165	bxeq	lr			/* Return now if done */
166
167	and	r4, r2, #0x18
168	rsbs	r4, r4, #0x18
169	addne	pc, pc, r4, lsl #1
170	nop
171
172	/* At least 24 bytes remaining */
173	ldr	r4, [r1], #0x04
174	ldr	r5, [r1], #0x04
175	sub	r2, r2, #0x08
176	strd	r4, [r3], #0x08
177
178	/* At least 16 bytes remaining */
179	ldr	r4, [r1], #0x04
180	ldr	r5, [r1], #0x04
181	sub	r2, r2, #0x08
182	strd	r4, [r3], #0x08
183
184	/* At least 8 bytes remaining */
185	ldr	r4, [r1], #0x04
186	ldr	r5, [r1], #0x04
187	subs	r2, r2, #0x08
188	strd	r4, [r3], #0x08
189
190	/* Less than 8 bytes remaining */
191	ldmfd	sp!, {r4-r9}
192	bxeq	lr			/* Return now if done */
193	subs	r2, r2, #0x04
194	ldrge	ip, [r1], #0x04
195	strge	ip, [r3], #0x04
196	bxeq	lr			/* Return now if done */
197	addlt	r2, r2, #0x04
198	ldrb	ip, [r1], #0x01
199	cmp	r2, #0x02
200	ldrbge	r2, [r1], #0x01
201	strb	ip, [r3], #0x01
202	ldrbgt	ip, [r1]
203	strbge	r2, [r3], #0x01
204	strbgt	ip, [r3]
205	bx	lr
206
207
208/*
209 * At this point, it has not been possible to word align both buffers.
210 * The destination buffer is word aligned, but the source buffer is not.
211 */
212.Lmemcpy_bad_align:
213	stmfd	sp!, {r4-r7}
214	bic	r1, r1, #0x03
215	cmp	ip, #2
216	ldr	ip, [r1], #0x04
217	bgt	.Lmemcpy_bad3
218	beq	.Lmemcpy_bad2
219	b	.Lmemcpy_bad1
220
221.Lmemcpy_bad1_loop16:
222	mov	r4, ip, lsr #8
223	ldr	r5, [r1], #0x04
224	pld	[r1, #0x018]
225	ldr	r6, [r1], #0x04
226	ldr	r7, [r1], #0x04
227	ldr	ip, [r1], #0x04
228	orr	r4, r4, r5, lsl #24
229	mov	r5, r5, lsr #8
230	orr	r5, r5, r6, lsl #24
231	mov	r6, r6, lsr #8
232	orr	r6, r6, r7, lsl #24
233	mov	r7, r7, lsr #8
234	orr	r7, r7, ip, lsl #24
235	str	r4, [r3], #0x04
236	str	r5, [r3], #0x04
237	str	r6, [r3], #0x04
238	str	r7, [r3], #0x04
239.Lmemcpy_bad1:
240	subs	r2, r2, #0x10
241	bge	.Lmemcpy_bad1_loop16
242
243	adds	r2, r2, #0x10
244	ldmfdeq	sp!, {r4-r7}
245	bxeq	lr			/* Return now if done */
246	subs	r2, r2, #0x04
247	sublt	r1, r1, #0x03
248	blt	.Lmemcpy_bad_done
249
250.Lmemcpy_bad1_loop4:
251	mov	r4, ip, lsr #8
252	ldr	ip, [r1], #0x04
253	subs	r2, r2, #0x04
254	orr	r4, r4, ip, lsl #24
255	str	r4, [r3], #0x04
256	bge	.Lmemcpy_bad1_loop4
257	sub	r1, r1, #0x03
258	b	.Lmemcpy_bad_done
259
260.Lmemcpy_bad2_loop16:
261	mov	r4, ip, lsr #16
262	ldr	r5, [r1], #0x04
263	pld	[r1, #0x018]
264	ldr	r6, [r1], #0x04
265	ldr	r7, [r1], #0x04
266	ldr	ip, [r1], #0x04
267	orr	r4, r4, r5, lsl #16
268	mov	r5, r5, lsr #16
269	orr	r5, r5, r6, lsl #16
270	mov	r6, r6, lsr #16
271	orr	r6, r6, r7, lsl #16
272	mov	r7, r7, lsr #16
273	orr	r7, r7, ip, lsl #16
274	str	r4, [r3], #0x04
275	str	r5, [r3], #0x04
276	str	r6, [r3], #0x04
277	str	r7, [r3], #0x04
278.Lmemcpy_bad2:
279	subs	r2, r2, #0x10
280	bge	.Lmemcpy_bad2_loop16
281
282	adds	r2, r2, #0x10
283	ldmfdeq	sp!, {r4-r7}
284	bxeq	lr			/* Return now if done */
285	subs	r2, r2, #0x04
286	sublt	r1, r1, #0x02
287	blt	.Lmemcpy_bad_done
288
289.Lmemcpy_bad2_loop4:
290	mov	r4, ip, lsr #16
291	ldr	ip, [r1], #0x04
292	subs	r2, r2, #0x04
293	orr	r4, r4, ip, lsl #16
294	str	r4, [r3], #0x04
295	bge	.Lmemcpy_bad2_loop4
296	sub	r1, r1, #0x02
297	b	.Lmemcpy_bad_done
298
299.Lmemcpy_bad3_loop16:
300	mov	r4, ip, lsr #24
301	ldr	r5, [r1], #0x04
302	pld	[r1, #0x018]
303	ldr	r6, [r1], #0x04
304	ldr	r7, [r1], #0x04
305	ldr	ip, [r1], #0x04
306	orr	r4, r4, r5, lsl #8
307	mov	r5, r5, lsr #24
308	orr	r5, r5, r6, lsl #8
309	mov	r6, r6, lsr #24
310	orr	r6, r6, r7, lsl #8
311	mov	r7, r7, lsr #24
312	orr	r7, r7, ip, lsl #8
313	str	r4, [r3], #0x04
314	str	r5, [r3], #0x04
315	str	r6, [r3], #0x04
316	str	r7, [r3], #0x04
317.Lmemcpy_bad3:
318	subs	r2, r2, #0x10
319	bge	.Lmemcpy_bad3_loop16
320
321	adds	r2, r2, #0x10
322	ldmfdeq	sp!, {r4-r7}
323	bxeq	lr			/* Return now if done */
324	subs	r2, r2, #0x04
325	sublt	r1, r1, #0x01
326	blt	.Lmemcpy_bad_done
327
328.Lmemcpy_bad3_loop4:
329	mov	r4, ip, lsr #24
330	ldr	ip, [r1], #0x04
331	subs	r2, r2, #0x04
332	orr	r4, r4, ip, lsl #8
333	str	r4, [r3], #0x04
334	bge	.Lmemcpy_bad3_loop4
335	sub	r1, r1, #0x01
336
337.Lmemcpy_bad_done:
338	ldmfd	sp!, {r4-r7}
339	adds	r2, r2, #0x04
340	bxeq	lr
341	ldrb	ip, [r1], #0x01
342	cmp	r2, #0x02
343	ldrbge	r2, [r1], #0x01
344	strb	ip, [r3], #0x01
345	ldrbgt	ip, [r1]
346	strbge	r2, [r3], #0x01
347	strbgt	ip, [r3]
348	bx	lr
349
350
351/*
352 * Handle short copies (less than 16 bytes), possibly misaligned.
353 * Some of these are *very* common, thanks to the network stack,
354 * and so are handled specially.
355 */
356.Lmemcpy_short:
357#ifndef _STANDALONE
358	add	pc, pc, r2, lsl #2
359	nop
360	bx	lr			/* 0x00 */
361	b	.Lmemcpy_bytewise	/* 0x01 */
362	b	.Lmemcpy_bytewise	/* 0x02 */
363	b	.Lmemcpy_bytewise	/* 0x03 */
364	b	.Lmemcpy_4		/* 0x04 */
365	b	.Lmemcpy_bytewise	/* 0x05 */
366	b	.Lmemcpy_6		/* 0x06 */
367	b	.Lmemcpy_bytewise	/* 0x07 */
368	b	.Lmemcpy_8		/* 0x08 */
369	b	.Lmemcpy_bytewise	/* 0x09 */
370	b	.Lmemcpy_bytewise	/* 0x0a */
371	b	.Lmemcpy_bytewise	/* 0x0b */
372	b	.Lmemcpy_c		/* 0x0c */
373#endif
374.Lmemcpy_bytewise:
375	mov	r3, r0			/* We must not clobber r0 */
376	ldrb	ip, [r1], #0x01
3771:	subs	r2, r2, #0x01
378	strb	ip, [r3], #0x01
379	ldrbne	ip, [r1], #0x01
380	bne	1b
381	bx	lr
382
383#ifndef _STANDALONE
384/******************************************************************************
385 * Special case for 4 byte copies
386 */
387#define	LMEMCPY_4_LOG2	6	/* 64 bytes */
388#define	LMEMCPY_4_PAD	.align LMEMCPY_4_LOG2
389	LMEMCPY_4_PAD
390.Lmemcpy_4:
391	and	r2, r1, #0x03
392	orr	r2, r2, r0, lsl #2
393	ands	r2, r2, #0x0f
394	sub	r3, pc, #0x14
395	addne	pc, r3, r2, lsl #LMEMCPY_4_LOG2
396
397/*
398 * 0000: dst is 32-bit aligned, src is 32-bit aligned
399 */
400	ldr	r2, [r1]
401	str	r2, [r0]
402	bx	lr
403	LMEMCPY_4_PAD
404
405/*
406 * 0001: dst is 32-bit aligned, src is 8-bit aligned
407 */
408	ldr	r3, [r1, #-1]		/* BE:r3 = x012  LE:r3 = 210x */
409	ldr	r2, [r1, #3]		/* BE:r2 = 3xxx  LE:r2 = xxx3 */
410	mov	r3, r3, lsr #8		/* r3 = .210 */
411	orr	r3, r3, r2, lsl #24	/* r3 = 3210 */
412	str	r3, [r0]
413	bx	lr
414	LMEMCPY_4_PAD
415
416/*
417 * 0010: dst is 32-bit aligned, src is 16-bit aligned
418 */
419	ldrh	r3, [r1, #0x02]
420	ldrh	r2, [r1]
421	orr	r3, r2, r3, lsl #16
422	str	r3, [r0]
423	bx	lr
424	LMEMCPY_4_PAD
425
426/*
427 * 0011: dst is 32-bit aligned, src is 8-bit aligned
428 */
429	ldr	r3, [r1, #-3]		/* BE:r3 = xxx0  LE:r3 = 0xxx */
430	ldr	r2, [r1, #1]		/* BE:r2 = 123x  LE:r2 = x321 */
431	mov	r3, r3, lsr #24		/* r3 = ...0 */
432	orr	r3, r3, r2, lsl #8	/* r3 = 3210 */
433	str	r3, [r0]
434	bx	lr
435	LMEMCPY_4_PAD
436
437/*
438 * 0100: dst is 8-bit aligned, src is 32-bit aligned
439 */
440	ldr	r2, [r1]
441	strb	r2, [r0]
442	mov	r3, r2, lsr #8
443	mov	r1, r2, lsr #24
444	strb	r1, [r0, #0x03]
445	strh	r3, [r0, #0x01]
446	bx	lr
447	LMEMCPY_4_PAD
448
449/*
450 * 0101: dst is 8-bit aligned, src is 8-bit aligned
451 */
452	ldrb	r2, [r1]
453	ldrh	r3, [r1, #0x01]
454	ldrb	r1, [r1, #0x03]
455	strb	r2, [r0]
456	strh	r3, [r0, #0x01]
457	strb	r1, [r0, #0x03]
458	bx	lr
459	LMEMCPY_4_PAD
460
461/*
462 * 0110: dst is 8-bit aligned, src is 16-bit aligned
463 */
464	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
465	ldrh	r3, [r1, #0x02]		/* LE:r3 = ..23  LE:r3 = ..32 */
466	strb	r2, [r0]
467	mov	r2, r2, lsr #8		/* r2 = ...1 */
468	orr	r2, r2, r3, lsl #8	/* r2 = .321 */
469	mov	r3, r3, lsr #8		/* r3 = ...3 */
470	strh	r2, [r0, #0x01]
471	strb	r3, [r0, #0x03]
472	bx	lr
473	LMEMCPY_4_PAD
474
475/*
476 * 0111: dst is 8-bit aligned, src is 8-bit aligned
477 */
478	ldrb	r2, [r1]
479	ldrh	r3, [r1, #0x01]
480	ldrb	r1, [r1, #0x03]
481	strb	r2, [r0]
482	strh	r3, [r0, #0x01]
483	strb	r1, [r0, #0x03]
484	bx	lr
485	LMEMCPY_4_PAD
486
487/*
488 * 1000: dst is 16-bit aligned, src is 32-bit aligned
489 */
490	ldr	r2, [r1]
491	strh	r2, [r0]
492	mov	r3, r2, lsr #16
493	strh	r3, [r0, #0x02]
494	bx	 lr
495	LMEMCPY_4_PAD
496
497/*
498 * 1001: dst is 16-bit aligned, src is 8-bit aligned
499 */
500	ldr	r2, [r1, #-1]		/* BE:r2 = x012  LE:r2 = 210x */
501	ldr	r3, [r1, #3]		/* BE:r3 = 3xxx  LE:r3 = xxx3 */
502	mov	r1, r2, lsr #8		/* BE:r1 = .x01  LE:r1 = .210 */
503	strh	r1, [r0]
504	mov	r2, r2, lsr #24		/* r2 = ...2 */
505	orr	r2, r2, r3, lsl #8	/* r2 = xx32 */
506	strh	r2, [r0, #0x02]
507	bx	lr
508	LMEMCPY_4_PAD
509
510/*
511 * 1010: dst is 16-bit aligned, src is 16-bit aligned
512 */
513	ldrh	r2, [r1]
514	ldrh	r3, [r1, #0x02]
515	strh	r2, [r0]
516	strh	r3, [r0, #0x02]
517	bx	lr
518	LMEMCPY_4_PAD
519
520/*
521 * 1011: dst is 16-bit aligned, src is 8-bit aligned
522 */
523	ldr	r3, [r1, #1]		/* BE:r3 = 123x  LE:r3 = x321 */
524	ldr	r2, [r1, #-3]		/* BE:r2 = xxx0  LE:r2 = 0xxx */
525	mov	r1, r3, lsr #8		/* BE:r1 = .123  LE:r1 = .x32 */
526	strh	r1, [r0, #0x02]
527	mov	r3, r3, lsl #8		/* r3 = 321. */
528	orr	r3, r3, r2, lsr #24	/* r3 = 3210 */
529	strh	r3, [r0]
530	bx	lr
531	LMEMCPY_4_PAD
532
533/*
534 * 1100: dst is 8-bit aligned, src is 32-bit aligned
535 */
536	ldr	r2, [r1]		/* BE:r2 = 0123  LE:r2 = 3210 */
537	strb	r2, [r0]
538	mov	r3, r2, lsr #8
539	mov	r1, r2, lsr #24
540	strh	r3, [r0, #0x01]
541	strb	r1, [r0, #0x03]
542	bx	lr
543	LMEMCPY_4_PAD
544
545/*
546 * 1101: dst is 8-bit aligned, src is 8-bit aligned
547 */
548	ldrb	r2, [r1]
549	ldrh	r3, [r1, #0x01]
550	ldrb	r1, [r1, #0x03]
551	strb	r2, [r0]
552	strh	r3, [r0, #0x01]
553	strb	r1, [r0, #0x03]
554	bx	lr
555	LMEMCPY_4_PAD
556
557/*
558 * 1110: dst is 8-bit aligned, src is 16-bit aligned
559 */
560	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
561	ldrh	r3, [r1, #0x02]		/* BE:r3 = ..23  LE:r3 = ..32 */
562	strb	r2, [r0]
563	mov	r2, r2, lsr #8		/* r2 = ...1 */
564	orr	r2, r2, r3, lsl #8	/* r2 = .321 */
565	strh	r2, [r0, #0x01]
566	mov	r3, r3, lsr #8		/* r3 = ...3 */
567	strb	r3, [r0, #0x03]
568	bx	lr
569	LMEMCPY_4_PAD
570
571/*
572 * 1111: dst is 8-bit aligned, src is 8-bit aligned
573 */
574	ldrb	r2, [r1]
575	ldrh	r3, [r1, #0x01]
576	ldrb	r1, [r1, #0x03]
577	strb	r2, [r0]
578	strh	r3, [r0, #0x01]
579	strb	r1, [r0, #0x03]
580	bx	lr
581	LMEMCPY_4_PAD
582
583
584/******************************************************************************
585 * Special case for 6 byte copies
586 */
587#define	LMEMCPY_6_LOG2	6	/* 64 bytes */
588#define	LMEMCPY_6_PAD	.align LMEMCPY_6_LOG2
589	LMEMCPY_6_PAD
590.Lmemcpy_6:
591	and	r2, r1, #0x03
592	orr	r2, r2, r0, lsl #2
593	ands	r2, r2, #0x0f
594	sub	r3, pc, #0x14
595	addne	pc, r3, r2, lsl #LMEMCPY_6_LOG2
596
597/*
598 * 0000: dst is 32-bit aligned, src is 32-bit aligned
599 */
600	ldr	r2, [r1]
601	ldrh	r3, [r1, #0x04]
602	str	r2, [r0]
603	strh	r3, [r0, #0x04]
604	bx	lr
605	LMEMCPY_6_PAD
606
607/*
608 * 0001: dst is 32-bit aligned, src is 8-bit aligned
609 */
610	ldr	r2, [r1, #-1]		/* BE:r2 = x012  LE:r2 = 210x */
611	ldr	r3, [r1, #0x03]		/* BE:r3 = 345x  LE:r3 = x543 */
612	mov	r2, r2, lsr #8		/* r2 = .210 */
613	orr	r2, r2, r3, lsl #24	/* r2 = 3210 */
614	mov	r3, r3, lsr #8		/* BE:r3 = .345  LE:r3 = .x54 */
615	str	r2, [r0]
616	strh	r3, [r0, #0x04]
617	bx	lr
618	LMEMCPY_6_PAD
619
620/*
621 * 0010: dst is 32-bit aligned, src is 16-bit aligned
622 */
623	ldr	r3, [r1, #0x02]		/* BE:r3 = 2345  LE:r3 = 5432 */
624	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
625	mov	r1, r3, lsr #16		/* r1 = ..54 */
626	orr	r2, r2, r3, lsl #16	/* r2 = 3210 */
627	str	r2, [r0]
628	strh	r1, [r0, #0x04]
629	bx	lr
630	LMEMCPY_6_PAD
631
632/*
633 * 0011: dst is 32-bit aligned, src is 8-bit aligned
634 */
635	ldr	r2, [r1, #-3]		/* BE:r2 = xxx0  LE:r2 = 0xxx */
636	ldr	r3, [r1, #1]		/* BE:r3 = 1234  LE:r3 = 4321 */
637	ldr	r1, [r1, #5]		/* BE:r1 = 5xxx  LE:r3 = xxx5 */
638	mov	r2, r2, lsr #24		/* r2 = ...0 */
639	orr	r2, r2, r3, lsl #8	/* r2 = 3210 */
640	mov	r1, r1, lsl #8		/* r1 = xx5. */
641	orr	r1, r1, r3, lsr #24	/* r1 = xx54 */
642	str	r2, [r0]
643	strh	r1, [r0, #0x04]
644	bx	lr
645	LMEMCPY_6_PAD
646
647/*
648 * 0100: dst is 8-bit aligned, src is 32-bit aligned
649 */
650	ldr	r3, [r1]		/* BE:r3 = 0123  LE:r3 = 3210 */
651	ldrh	r2, [r1, #0x04]		/* BE:r2 = ..45  LE:r2 = ..54 */
652	mov	r1, r3, lsr #8		/* BE:r1 = .012  LE:r1 = .321 */
653	strh	r1, [r0, #0x01]
654	strb	r3, [r0]
655	mov	r3, r3, lsr #24		/* r3 = ...3 */
656	orr	r3, r3, r2, lsl #8	/* r3 = .543 */
657	mov	r2, r2, lsr #8		/* r2 = ...5 */
658	strh	r3, [r0, #0x03]
659	strb	r2, [r0, #0x05]
660	bx	lr
661	LMEMCPY_6_PAD
662
663/*
664 * 0101: dst is 8-bit aligned, src is 8-bit aligned
665 */
666	ldrb	r2, [r1]
667	ldrh	r3, [r1, #0x01]
668	ldrh	ip, [r1, #0x03]
669	ldrb	r1, [r1, #0x05]
670	strb	r2, [r0]
671	strh	r3, [r0, #0x01]
672	strh	ip, [r0, #0x03]
673	strb	r1, [r0, #0x05]
674	bx	lr
675	LMEMCPY_6_PAD
676
677/*
678 * 0110: dst is 8-bit aligned, src is 16-bit aligned
679 */
680	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
681	ldr	r1, [r1, #0x02]		/* BE:r1 = 2345  LE:r1 = 5432 */
682	strb	r2, [r0]
683	mov	r3, r1, lsr #24
684	strb	r3, [r0, #0x05]
685	mov	r3, r1, lsr #8		/* r3 = .543 */
686	strh	r3, [r0, #0x03]
687	mov	r3, r2, lsr #8		/* r3 = ...1 */
688	orr	r3, r3, r1, lsl #8	/* r3 = 4321 */
689	strh	r3, [r0, #0x01]
690	bx	lr
691	LMEMCPY_6_PAD
692
693/*
694 * 0111: dst is 8-bit aligned, src is 8-bit aligned
695 */
696	ldrb	r2, [r1]
697	ldrh	r3, [r1, #0x01]
698	ldrh	ip, [r1, #0x03]
699	ldrb	r1, [r1, #0x05]
700	strb	r2, [r0]
701	strh	r3, [r0, #0x01]
702	strh	ip, [r0, #0x03]
703	strb	r1, [r0, #0x05]
704	bx	lr
705	LMEMCPY_6_PAD
706
707/*
708 * 1000: dst is 16-bit aligned, src is 32-bit aligned
709 */
710	ldrh	r2, [r1, #0x04]		/* r2 = ..54 */
711	ldr	r3, [r1]		/* r3 = 3210 */
712	mov	r2, r2, lsl #16		/* r2 = 54.. */
713	orr	r2, r2, r3, lsr #16	/* r2 = 5432 */
714	strh	r3, [r0]
715	str	r2, [r0, #0x02]
716	bx	lr
717	LMEMCPY_6_PAD
718
719/*
720 * 1001: dst is 16-bit aligned, src is 8-bit aligned
721 */
722	ldr	r3, [r1, #-1]		/* BE:r3 = x012  LE:r3 = 210x */
723	ldr	r2, [r1, #3]		/* BE:r2 = 345x  LE:r2 = x543 */
724	mov	r1, r3, lsr #8		/* BE:r1 = .x01  LE:r1 = .210 */
725	mov	r2, r2, lsl #8		/* r2 = 543. */
726	orr	r2, r2, r3, lsr #24	/* r2 = 5432 */
727	strh	r1, [r0]
728	str	r2, [r0, #0x02]
729	bx	lr
730	LMEMCPY_6_PAD
731
732/*
733 * 1010: dst is 16-bit aligned, src is 16-bit aligned
734 */
735	ldrh	r2, [r1]
736	ldr	r3, [r1, #0x02]
737	strh	r2, [r0]
738	str	r3, [r0, #0x02]
739	bx	lr
740	LMEMCPY_6_PAD
741
742/*
743 * 1011: dst is 16-bit aligned, src is 8-bit aligned
744 */
745	ldrb	r3, [r1]		/* r3 = ...0 */
746	ldr	r2, [r1, #0x01]		/* BE:r2 = 1234  LE:r2 = 4321 */
747	ldrb	r1, [r1, #0x05]		/* r1 = ...5 */
748	orr	r3, r3, r2, lsl #8	/* r3 = 3210 */
749	mov	r1, r1, lsl #24		/* r1 = 5... */
750	orr	r1, r1, r2, lsr #8	/* r1 = 5432 */
751	strh	r3, [r0]
752	str	r1, [r0, #0x02]
753	bx	lr
754	LMEMCPY_6_PAD
755
756/*
757 * 1100: dst is 8-bit aligned, src is 32-bit aligned
758 */
759	ldr	r2, [r1]		/* BE:r2 = 0123  LE:r2 = 3210 */
760	ldrh	r1, [r1, #0x04]		/* BE:r1 = ..45  LE:r1 = ..54 */
761	strb	r2, [r0]
762	mov	r2, r2, lsr #8		/* r2 = .321 */
763	orr	r2, r2, r1, lsl #24	/* r2 = 4321 */
764	mov	r1, r1, lsr #8		/* r1 = ...5 */
765	str	r2, [r0, #0x01]
766	strb	r1, [r0, #0x05]
767	bx	lr
768	LMEMCPY_6_PAD
769
770/*
771 * 1101: dst is 8-bit aligned, src is 8-bit aligned
772 */
773	ldrb	r2, [r1]
774	ldrh	r3, [r1, #0x01]
775	ldrh	ip, [r1, #0x03]
776	ldrb	r1, [r1, #0x05]
777	strb	r2, [r0]
778	strh	r3, [r0, #0x01]
779	strh	ip, [r0, #0x03]
780	strb	r1, [r0, #0x05]
781	bx	lr
782	LMEMCPY_6_PAD
783
784/*
785 * 1110: dst is 8-bit aligned, src is 16-bit aligned
786 */
787	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
788	ldr	r1, [r1, #0x02]		/* BE:r1 = 2345  LE:r1 = 5432 */
789	strb	r2, [r0]
790	mov	r2, r2, lsr #8		/* r2 = ...1 */
791	orr	r2, r2, r1, lsl #8	/* r2 = 4321 */
792	mov	r1, r1, lsr #24		/* r1 = ...5 */
793	str	r2, [r0, #0x01]
794	strb	r1, [r0, #0x05]
795	bx	lr
796	LMEMCPY_6_PAD
797
798/*
799 * 1111: dst is 8-bit aligned, src is 8-bit aligned
800 */
801	ldrb	r2, [r1]
802	ldr	r3, [r1, #0x01]
803	ldrb	r1, [r1, #0x05]
804	strb	r2, [r0]
805	str	r3, [r0, #0x01]
806	strb	r1, [r0, #0x05]
807	bx	lr
808	LMEMCPY_6_PAD
809
810
811/******************************************************************************
812 * Special case for 8 byte copies
813 */
814#define	LMEMCPY_8_LOG2	6	/* 64 bytes */
815#define	LMEMCPY_8_PAD	.align LMEMCPY_8_LOG2
816	LMEMCPY_8_PAD
817.Lmemcpy_8:
818	and	r2, r1, #0x03
819	orr	r2, r2, r0, lsl #2
820	ands	r2, r2, #0x0f
821	sub	r3, pc, #0x14
822	addne	pc, r3, r2, lsl #LMEMCPY_8_LOG2
823
824/*
825 * 0000: dst is 32-bit aligned, src is 32-bit aligned
826 */
827	ldr	r2, [r1]
828	ldr	r3, [r1, #0x04]
829	str	r2, [r0]
830	str	r3, [r0, #0x04]
831	bx	lr
832	LMEMCPY_8_PAD
833
834/*
835 * 0001: dst is 32-bit aligned, src is 8-bit aligned
836 */
837	ldr	r3, [r1, #-1]		/* BE:r3 = x012  LE:r3 = 210x */
838	ldr	r2, [r1, #0x03]		/* BE:r2 = 3456  LE:r2 = 6543 */
839	ldrb	r1, [r1, #0x07]		/* r1 = ...7 */
840	mov	r3, r3, lsr #8		/* r3 = .210 */
841	orr	r3, r3, r2, lsl #24	/* r3 = 3210 */
842	mov	r1, r1, lsl #24		/* r1 = 7... */
843	orr	r2, r1, r2, lsr #8	/* r2 = 7654 */
844	str	r3, [r0]
845	str	r2, [r0, #0x04]
846	bx	lr
847	LMEMCPY_8_PAD
848
849/*
850 * 0010: dst is 32-bit aligned, src is 16-bit aligned
851 */
852	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
853	ldr	r3, [r1, #0x02]		/* BE:r3 = 2345  LE:r3 = 5432 */
854	ldrh	r1, [r1, #0x06]		/* BE:r1 = ..67  LE:r1 = ..76 */
855	orr	r2, r2, r3, lsl #16	/* r2 = 3210 */
856	mov	r3, r3, lsr #16		/* r3 = ..54 */
857	orr	r3, r3, r1, lsl #16	/* r3 = 7654 */
858	str	r2, [r0]
859	str	r3, [r0, #0x04]
860	bx	lr
861	LMEMCPY_8_PAD
862
863/*
864 * 0011: dst is 32-bit aligned, src is 8-bit aligned
865 */
866	ldrb	r3, [r1]		/* r3 = ...0 */
867	ldr	r2, [r1, #0x01]		/* BE:r2 = 1234  LE:r2 = 4321 */
868	ldr	r1, [r1, #0x05]		/* BE:r1 = 567x  LE:r1 = x765 */
869	orr	r3, r3, r2, lsl #8	/* r3 = 3210 */
870	mov	r2, r2, lsr #24		/* r2 = ...4 */
871	orr	r2, r2, r1, lsl #8	/* r2 = 7654 */
872	str	r3, [r0]
873	str	r2, [r0, #0x04]
874	bx	lr
875	LMEMCPY_8_PAD
876
877/*
878 * 0100: dst is 8-bit aligned, src is 32-bit aligned
879 */
880	ldr	r3, [r1]		/* BE:r3 = 0123  LE:r3 = 3210 */
881	ldr	r2, [r1, #0x04]		/* BE:r2 = 4567  LE:r2 = 7654 */
882	strb	r3, [r0]
883	mov	r1, r2, lsr #24		/* r1 = ...7 */
884	strb	r1, [r0, #0x07]
885	mov	r1, r3, lsr #8		/* r1 = .321 */
886	mov	r3, r3, lsr #24		/* r3 = ...3 */
887	orr	r3, r3, r2, lsl #8	/* r3 = 6543 */
888	strh	r1, [r0, #0x01]
889	str	r3, [r0, #0x03]
890	bx	lr
891	LMEMCPY_8_PAD
892
893/*
894 * 0101: dst is 8-bit aligned, src is 8-bit aligned
895 */
896	ldrb	r2, [r1]
897	ldrh	r3, [r1, #0x01]
898	ldr	ip, [r1, #0x03]
899	ldrb	r1, [r1, #0x07]
900	strb	r2, [r0]
901	strh	r3, [r0, #0x01]
902	str	ip, [r0, #0x03]
903	strb	r1, [r0, #0x07]
904	bx	lr
905	LMEMCPY_8_PAD
906
907/*
908 * 0110: dst is 8-bit aligned, src is 16-bit aligned
909 */
910	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
911	ldr	r3, [r1, #0x02]		/* BE:r3 = 2345  LE:r3 = 5432 */
912	ldrh	r1, [r1, #0x06]		/* BE:r1 = ..67  LE:r1 = ..76 */
913	strb	r2, [r0]		/* 0 */
914	mov	ip, r1, lsr #8		/* ip = ...7 */
915	strb	ip, [r0, #0x07]		/* 7 */
916	mov	ip, r2, lsr #8		/* ip = ...1 */
917	orr	ip, ip, r3, lsl #8	/* ip = 4321 */
918	mov	r3, r3, lsr #8		/* r3 = .543 */
919	orr	r3, r3, r1, lsl #24	/* r3 = 6543 */
920	strh	ip, [r0, #0x01]
921	str	r3, [r0, #0x03]
922	bx	lr
923	LMEMCPY_8_PAD
924
925/*
926 * 0111: dst is 8-bit aligned, src is 8-bit aligned
927 */
928	ldrb	r3, [r1]		/* r3 = ...0 */
929	ldr	ip, [r1, #0x01]		/* BE:ip = 1234  LE:ip = 4321 */
930	ldrh	r2, [r1, #0x05]		/* BE:r2 = ..56  LE:r2 = ..65 */
931	ldrb	r1, [r1, #0x07]		/* r1 = ...7 */
932	strb	r3, [r0]
933	mov	r3, ip, lsr #16		/* BE:r3 = ..12  LE:r3 = ..43 */
934	strh	ip, [r0, #0x01]
935	orr	r2, r3, r2, lsl #16	/* r2 = 6543 */
936	str	r2, [r0, #0x03]
937	strb	r1, [r0, #0x07]
938	bx	lr
939	LMEMCPY_8_PAD
940
941/*
942 * 1000: dst is 16-bit aligned, src is 32-bit aligned
943 */
944	ldr	r2, [r1]		/* BE:r2 = 0123  LE:r2 = 3210 */
945	ldr	r3, [r1, #0x04]		/* BE:r3 = 4567  LE:r3 = 7654 */
946	mov	r1, r2, lsr #16		/* BE:r1 = ..01  LE:r1 = ..32 */
947	strh	r2, [r0]
948	orr	r2, r1, r3, lsl #16	/* r2 = 5432 */
949	mov	r3, r3, lsr #16		/* r3 = ..76 */
950	str	r2, [r0, #0x02]
951	strh	r3, [r0, #0x06]
952	bx	lr
953	LMEMCPY_8_PAD
954
955/*
956 * 1001: dst is 16-bit aligned, src is 8-bit aligned
957 */
958	ldr	r2, [r1, #-1]		/* BE:r2 = x012  LE:r2 = 210x */
959	ldr	r3, [r1, #0x03]		/* BE:r3 = 3456  LE:r3 = 6543 */
960	ldrb	ip, [r1, #0x07]		/* ip = ...7 */
961	mov	r1, r2, lsr #8		/* BE:r1 = .x01  LE:r1 = .210 */
962	strh	r1, [r0]
963	mov	r1, r2, lsr #24		/* r1 = ...2 */
964	orr	r1, r1, r3, lsl #8	/* r1 = 5432 */
965	mov	r3, r3, lsr #24		/* r3 = ...6 */
966	orr	r3, r3, ip, lsl #8	/* r3 = ..76 */
967	str	r1, [r0, #0x02]
968	strh	r3, [r0, #0x06]
969	bx	lr
970	LMEMCPY_8_PAD
971
972/*
973 * 1010: dst is 16-bit aligned, src is 16-bit aligned
974 */
975	ldrh	r2, [r1]
976	ldr	ip, [r1, #0x02]
977	ldrh	r3, [r1, #0x06]
978	strh	r2, [r0]
979	str	ip, [r0, #0x02]
980	strh	r3, [r0, #0x06]
981	bx	lr
982	LMEMCPY_8_PAD
983
984/*
985 * 1011: dst is 16-bit aligned, src is 8-bit aligned
986 */
987	ldr	r3, [r1, #0x05]		/* BE:r3 = 567x  LE:r3 = x765 */
988	ldr	r2, [r1, #0x01]		/* BE:r2 = 1234  LE:r2 = 4321 */
989	ldrb	ip, [r1]		/* ip = ...0 */
990	mov	r1, r3, lsr #8		/* BE:r1 = .567  LE:r1 = .x76 */
991	strh	r1, [r0, #0x06]
992	mov	r3, r3, lsl #24		/* r3 = 5... */
993	orr	r3, r3, r2, lsr #8	/* r3 = 5432 */
994	orr	r2, ip, r2, lsl #8	/* r2 = 3210 */
995	str	r3, [r0, #0x02]
996	strh	r2, [r0]
997	bx	lr
998	LMEMCPY_8_PAD
999
1000/*
1001 * 1100: dst is 8-bit aligned, src is 32-bit aligned
1002 */
1003	ldr	r3, [r1, #0x04]		/* BE:r3 = 4567  LE:r3 = 7654 */
1004	ldr	r2, [r1]		/* BE:r2 = 0123  LE:r2 = 3210 */
1005	mov	r1, r3, lsr #8		/* BE:r1 = .456  LE:r1 = .765 */
1006	strh	r1, [r0, #0x05]
1007	strb	r2, [r0]
1008	mov	r1, r3, lsr #24		/* r1 = ...7 */
1009	strb	r1, [r0, #0x07]
1010	mov	r2, r2, lsr #8		/* r2 = .321 */
1011	orr	r2, r2, r3, lsl #24	/* r2 = 4321 */
1012	str	r2, [r0, #0x01]
1013	bx	 lr
1014	LMEMCPY_8_PAD
1015
1016/*
1017 * 1101: dst is 8-bit aligned, src is 8-bit aligned
1018 */
1019	ldrb	r3, [r1]		/* r3 = ...0 */
1020	ldrh	r2, [r1, #0x01]		/* BE:r2 = ..12  LE:r2 = ..21 */
1021	ldr	ip, [r1, #0x03]		/* BE:ip = 3456  LE:ip = 6543 */
1022	ldrb	r1, [r1, #0x07]		/* r1 = ...7 */
1023	strb	r3, [r0]
1024	mov	r3, ip, lsr #16		/* BE:r3 = ..34  LE:r3 = ..65 */
1025	strh	r3, [r0, #0x05]
1026	orr	r2, r2, ip, lsl #16	/* r2 = 4321 */
1027	str	r2, [r0, #0x01]
1028	strb	r1, [r0, #0x07]
1029	bx	lr
1030	LMEMCPY_8_PAD
1031
1032/*
1033 * 1110: dst is 8-bit aligned, src is 16-bit aligned
1034 */
1035	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
1036	ldr	r3, [r1, #0x02]		/* BE:r3 = 2345  LE:r3 = 5432 */
1037	ldrh	r1, [r1, #0x06]		/* BE:r1 = ..67  LE:r1 = ..76 */
1038	strb	r2, [r0]
1039	mov	ip, r2, lsr #8		/* ip = ...1 */
1040	orr	ip, ip, r3, lsl #8	/* ip = 4321 */
1041	mov	r2, r1, lsr #8		/* r2 = ...7 */
1042	strb	r2, [r0, #0x07]
1043	mov	r1, r1, lsl #8		/* r1 = .76. */
1044	orr	r1, r1, r3, lsr #24	/* r1 = .765 */
1045	str	ip, [r0, #0x01]
1046	strh	r1, [r0, #0x05]
1047	bx	lr
1048	LMEMCPY_8_PAD
1049
1050/*
1051 * 1111: dst is 8-bit aligned, src is 8-bit aligned
1052 */
1053	ldrb	r2, [r1]
1054	ldr	ip, [r1, #0x01]
1055	ldrh	r3, [r1, #0x05]
1056	ldrb	r1, [r1, #0x07]
1057	strb	r2, [r0]
1058	str	ip, [r0, #0x01]
1059	strh	r3, [r0, #0x05]
1060	strb	r1, [r0, #0x07]
1061	bx	lr
1062	LMEMCPY_8_PAD
1063
1064/******************************************************************************
1065 * Special case for 12 byte copies
1066 */
1067#define	LMEMCPY_C_LOG2	7	/* 128 bytes */
1068#define	LMEMCPY_C_PAD	.align LMEMCPY_C_LOG2
1069	LMEMCPY_C_PAD
1070.Lmemcpy_c:
1071	and	r2, r1, #0x03
1072	orr	r2, r2, r0, lsl #2
1073	ands	r2, r2, #0x0f
1074	sub	r3, pc, #0x14
1075	addne	pc, r3, r2, lsl #LMEMCPY_C_LOG2
1076
1077/*
1078 * 0000: dst is 32-bit aligned, src is 32-bit aligned
1079 */
1080	ldr	r2, [r1]
1081	ldr	r3, [r1, #0x04]
1082	ldr	r1, [r1, #0x08]
1083	str	r2, [r0]
1084	str	r3, [r0, #0x04]
1085	str	r1, [r0, #0x08]
1086	bx	lr
1087	LMEMCPY_C_PAD
1088
1089/*
1090 * 0001: dst is 32-bit aligned, src is 8-bit aligned
1091 */
1092	ldrb	r2, [r1, #0xb]		/* r2 = ...B */
1093	ldr	ip, [r1, #0x07]		/* BE:ip = 789A  LE:ip = A987 */
1094	ldr	r3, [r1, #0x03]		/* BE:r3 = 3456  LE:r3 = 6543 */
1095	ldr	r1, [r1, #-1]		/* BE:r1 = x012  LE:r1 = 210x */
1096	mov	r2, r2, lsl #24		/* r2 = B... */
1097	orr	r2, r2, ip, lsr #8	/* r2 = BA98 */
1098	str	r2, [r0, #0x08]
1099	mov	r2, ip, lsl #24		/* r2 = 7... */
1100	orr	r2, r2, r3, lsr #8	/* r2 = 7654 */
1101	mov	r1, r1, lsr #8		/* r1 = .210 */
1102	orr	r1, r1, r3, lsl #24	/* r1 = 3210 */
1103	str	r2, [r0, #0x04]
1104	str	r1, [r0]
1105	bx	lr
1106	LMEMCPY_C_PAD
1107
1108/*
1109 * 0010: dst is 32-bit aligned, src is 16-bit aligned
1110 */
1111	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
1112	ldr	r3, [r1, #0x02]		/* BE:r3 = 2345  LE:r3 = 5432 */
1113	ldr	ip, [r1, #0x06]		/* BE:ip = 6789  LE:ip = 9876 */
1114	ldrh	r1, [r1, #0x0a]		/* BE:r1 = ..AB  LE:r1 = ..BA */
1115	orr	r2, r2, r3, lsl #16	/* r2 = 3210 */
1116	str	r2, [r0]
1117	mov	r3, r3, lsr #16		/* r3 = ..54 */
1118	orr	r3, r3, ip, lsl #16	/* r3 = 7654 */
1119	mov	r1, r1, lsl #16		/* r1 = BA.. */
1120	orr	r1, r1, ip, lsr #16	/* r1 = BA98 */
1121	str	r3, [r0, #0x04]
1122	str	r1, [r0, #0x08]
1123	bx	lr
1124	LMEMCPY_C_PAD
1125
1126/*
1127 * 0011: dst is 32-bit aligned, src is 8-bit aligned
1128 */
1129	ldrb	r2, [r1]		/* r2 = ...0 */
1130	ldr	r3, [r1, #0x01]		/* BE:r3 = 1234  LE:r3 = 4321 */
1131	ldr	ip, [r1, #0x05]		/* BE:ip = 5678  LE:ip = 8765 */
1132	ldr	r1, [r1, #0x09]		/* BE:r1 = 9ABx  LE:r1 = xBA9 */
1133	orr	r2, r2, r3, lsl #8	/* r2 = 3210 */
1134	str	r2, [r0]
1135	mov	r3, r3, lsr #24		/* r3 = ...4 */
1136	orr	r3, r3, ip, lsl #8	/* r3 = 7654 */
1137	mov	r1, r1, lsl #8		/* r1 = BA9. */
1138	orr	r1, r1, ip, lsr #24	/* r1 = BA98 */
1139	str	r3, [r0, #0x04]
1140	str	r1, [r0, #0x08]
1141	bx	lr
1142	LMEMCPY_C_PAD
1143
1144/*
1145 * 0100: dst is 8-bit aligned (byte 1), src is 32-bit aligned
1146 */
1147	ldr	r2, [r1]		/* BE:r2 = 0123  LE:r2 = 3210 */
1148	ldr	r3, [r1, #0x04]		/* BE:r3 = 4567  LE:r3 = 7654 */
1149	ldr	ip, [r1, #0x08]		/* BE:ip = 89AB  LE:ip = BA98 */
1150	mov	r1, r2, lsr #8		/* BE:r1 = .012  LE:r1 = .321 */
1151	strh	r1, [r0, #0x01]
1152	strb	r2, [r0]
1153	mov	r1, r2, lsr #24		/* r1 = ...3 */
1154	orr	r2, r1, r3, lsl #8	/* r1 = 6543 */
1155	mov	r1, r3, lsr #24		/* r1 = ...7 */
1156	orr	r1, r1, ip, lsl #8	/* r1 = A987 */
1157	mov	ip, ip, lsr #24		/* ip = ...B */
1158	str	r2, [r0, #0x03]
1159	str	r1, [r0, #0x07]
1160	strb	ip, [r0, #0x0b]
1161	bx	lr
1162	LMEMCPY_C_PAD
1163
1164/*
1165 * 0101: dst is 8-bit aligned (byte 1), src is 8-bit aligned (byte 1)
1166 */
1167	ldrb	r2, [r1]
1168	ldrh	r3, [r1, #0x01]
1169	ldr	ip, [r1, #0x03]
1170	strb	r2, [r0]
1171	ldr	r2, [r1, #0x07]
1172	ldrb	r1, [r1, #0x0b]
1173	strh	r3, [r0, #0x01]
1174	str	ip, [r0, #0x03]
1175	str	r2, [r0, #0x07]
1176	strb	r1, [r0, #0x0b]
1177	bx	lr
1178	LMEMCPY_C_PAD
1179
1180/*
1181 * 0110: dst is 8-bit aligned (byte 1), src is 16-bit aligned
1182 */
1183	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
1184	ldr	r3, [r1, #0x02]		/* BE:r3 = 2345  LE:r3 = 5432 */
1185	ldr	ip, [r1, #0x06]		/* BE:ip = 6789  LE:ip = 9876 */
1186	ldrh	r1, [r1, #0x0a]		/* BE:r1 = ..AB  LE:r1 = ..BA */
1187	strb	r2, [r0]
1188	mov	r2, r2, lsr #8		/* r2 = ...1 */
1189	orr	r2, r2, r3, lsl #8	/* r2 = 4321 */
1190	strh	r2, [r0, #0x01]
1191	mov	r2, r3, lsr #8		/* r2 = .543 */
1192	orr	r3, r2, ip, lsl #24	/* r3 = 6543 */
1193	mov	r2, ip, lsr #8		/* r2 = .987 */
1194	orr	r2, r2, r1, lsl #24	/* r2 = A987 */
1195	mov	r1, r1, lsr #8		/* r1 = ...B */
1196	str	r3, [r0, #0x03]
1197	str	r2, [r0, #0x07]
1198	strb	r1, [r0, #0x0b]
1199	bx	lr
1200	LMEMCPY_C_PAD
1201
1202/*
1203 * 0111: dst is 8-bit aligned (byte 1), src is 8-bit aligned (byte 3)
1204 */
1205	ldrb	r2, [r1]
1206	ldr	r3, [r1, #0x01]		/* BE:r3 = 1234  LE:r3 = 4321 */
1207	ldr	ip, [r1, #0x05]		/* BE:ip = 5678  LE:ip = 8765 */
1208	ldr	r1, [r1, #0x09]		/* BE:r1 = 9ABx  LE:r1 = xBA9 */
1209	strb	r2, [r0]
1210	strh	r3, [r0, #0x01]
1211	mov	r3, r3, lsr #16		/* r3 = ..43 */
1212	orr	r3, r3, ip, lsl #16	/* r3 = 6543 */
1213	mov	ip, ip, lsr #16		/* ip = ..87 */
1214	orr	ip, ip, r1, lsl #16	/* ip = A987 */
1215	mov	r1, r1, lsr #16		/* r1 = ..xB */
1216	str	r3, [r0, #0x03]
1217	str	ip, [r0, #0x07]
1218	strb	r1, [r0, #0x0b]
1219	bx	lr
1220	LMEMCPY_C_PAD
1221
1222/*
1223 * 1000: dst is 16-bit aligned, src is 32-bit aligned
1224 */
1225	ldr	ip, [r1]		/* BE:ip = 0123  LE:ip = 3210 */
1226	ldr	r3, [r1, #0x04]		/* BE:r3 = 4567  LE:r3 = 7654 */
1227	ldr	r2, [r1, #0x08]		/* BE:r2 = 89AB  LE:r2 = BA98 */
1228	mov	r1, ip, lsr #16		/* BE:r1 = ..01  LE:r1 = ..32 */
1229	strh	ip, [r0]
1230	orr	r1, r1, r3, lsl #16	/* r1 = 5432 */
1231	mov	r3, r3, lsr #16		/* r3 = ..76 */
1232	orr	r3, r3, r2, lsl #16	/* r3 = 9876 */
1233	mov	r2, r2, lsr #16		/* r2 = ..BA */
1234	str	r1, [r0, #0x02]
1235	str	r3, [r0, #0x06]
1236	strh	r2, [r0, #0x0a]
1237	bx	lr
1238	LMEMCPY_C_PAD
1239
1240/*
1241 * 1001: dst is 16-bit aligned, src is 8-bit aligned (byte 1)
1242 */
1243	ldr	r2, [r1, #-1]		/* BE:r2 = x012  LE:r2 = 210x */
1244	ldr	r3, [r1, #0x03]		/* BE:r3 = 3456  LE:r3 = 6543 */
1245	mov	ip, r2, lsr #8		/* BE:ip = .x01  LE:ip = .210 */
1246	strh	ip, [r0]
1247	ldr	ip, [r1, #0x07]		/* BE:ip = 789A  LE:ip = A987 */
1248	ldrb	r1, [r1, #0x0b]		/* r1 = ...B */
1249	mov	r2, r2, lsr #24		/* r2 = ...2 */
1250	orr	r2, r2, r3, lsl #8	/* r2 = 5432 */
1251	mov	r3, r3, lsr #24		/* r3 = ...6 */
1252	orr	r3, r3, ip, lsl #8	/* r3 = 9876 */
1253	mov	r1, r1, lsl #8		/* r1 = ..B. */
1254	orr	r1, r1, ip, lsr #24	/* r1 = ..BA */
1255	str	r2, [r0, #0x02]
1256	str	r3, [r0, #0x06]
1257	strh	r1, [r0, #0x0a]
1258	bx	lr
1259	LMEMCPY_C_PAD
1260
1261/*
1262 * 1010: dst is 16-bit aligned, src is 16-bit aligned
1263 */
1264	ldrh	r2, [r1]
1265	ldr	r3, [r1, #0x02]
1266	ldr	ip, [r1, #0x06]
1267	ldrh	r1, [r1, #0x0a]
1268	strh	r2, [r0]
1269	str	r3, [r0, #0x02]
1270	str	ip, [r0, #0x06]
1271	strh	r1, [r0, #0x0a]
1272	bx	lr
1273	LMEMCPY_C_PAD
1274
1275/*
1276 * 1011: dst is 16-bit aligned, src is 8-bit aligned (byte 3)
1277 */
1278	ldr	r2, [r1, #0x09]		/* BE:r2 = 9ABx  LE:r2 = xBA9 */
1279	ldr	r3, [r1, #0x05]		/* BE:r3 = 5678  LE:r3 = 8765 */
1280	mov	ip, r2, lsr #8		/* BE:ip = .9AB  LE:ip = .xBA */
1281	strh	ip, [r0, #0x0a]
1282	ldr	ip, [r1, #0x01]		/* BE:ip = 1234  LE:ip = 4321 */
1283	ldrb	r1, [r1]		/* r1 = ...0 */
1284	mov	r2, r2, lsl #24		/* r2 = 9... */
1285	orr	r2, r2, r3, lsr #8	/* r2 = 9876 */
1286	mov	r3, r3, lsl #24		/* r3 = 5... */
1287	orr	r3, r3, ip, lsr #8	/* r3 = 5432 */
1288	orr	r1, r1, ip, lsl #8	/* r1 = 3210 */
1289	str	r2, [r0, #0x06]
1290	str	r3, [r0, #0x02]
1291	strh	r1, [r0]
1292	bx	lr
1293	LMEMCPY_C_PAD
1294
1295/*
1296 * 1100: dst is 8-bit aligned (byte 3), src is 32-bit aligned
1297 */
1298	ldr	r2, [r1]		/* BE:r2 = 0123  LE:r2 = 3210 */
1299	ldr	ip, [r1, #0x04]		/* BE:ip = 4567  LE:ip = 7654 */
1300	ldr	r1, [r1, #0x08]		/* BE:r1 = 89AB  LE:r1 = BA98 */
1301	strb	r2, [r0]
1302	mov	r3, r2, lsr #8		/* r3 = .321 */
1303	orr	r3, r3, ip, lsl #24	/* r3 = 4321 */
1304	str	r3, [r0, #0x01]
1305	mov	r3, ip, lsr #8		/* r3 = .765 */
1306	orr	r3, r3, r1, lsl #24	/* r3 = 8765 */
1307	str	r3, [r0, #0x05]
1308	mov	r1, r1, lsr #8		/* r1 = .BA9 */
1309	strh	r1, [r0, #0x09]
1310	mov	r1, r1, lsr #16		/* r1 = ...B */
1311	strb	r1, [r0, #0x0b]
1312	bx	lr
1313	LMEMCPY_C_PAD
1314
1315/*
1316 * 1101: dst is 8-bit aligned (byte 3), src is 8-bit aligned (byte 1)
1317 */
1318	ldrb	r2, [r1, #0x0b]		/* r2 = ...B */
1319	ldr	r3, [r1, #0x07]		/* BE:r3 = 789A  LE:r3 = A987 */
1320	ldr	ip, [r1, #0x03]		/* BE:ip = 3456  LE:ip = 6543 */
1321	ldr	r1, [r1, #-1]		/* BE:r1 = x012  LE:r1 = 210x */
1322	strb	r2, [r0, #0x0b]
1323	mov	r2, r3, lsr #16		/* r2 = ..A9 */
1324	strh	r2, [r0, #0x09]
1325	mov	r3, r3, lsl #16		/* r3 = 87.. */
1326	orr	r3, r3, ip, lsr #16	/* r3 = 8765 */
1327	mov	ip, ip, lsl #16		/* ip = 43.. */
1328	orr	ip, ip, r1, lsr #16	/* ip = 4321 */
1329	mov	r1, r1, lsr #8		/* r1 = .210 */
1330	str	r3, [r0, #0x05]
1331	str	ip, [r0, #0x01]
1332	strb	r1, [r0]
1333	bx	lr
1334	LMEMCPY_C_PAD
1335
1336/*
1337 * 1110: dst is 8-bit aligned (byte 3), src is 16-bit aligned
1338 */
1339	ldrh	r2, [r1]		/* r2 = ..10 */
1340	ldr	r3, [r1, #0x02]		/* r3 = 5432 */
1341	ldr	ip, [r1, #0x06]		/* ip = 9876 */
1342	ldrh	r1, [r1, #0x0a]		/* r1 = ..BA */
1343	strb	r2, [r0]
1344	mov	r2, r2, lsr #8		/* r2 = ...1 */
1345	orr	r2, r2, r3, lsl #8	/* r2 = 4321 */
1346	mov	r3, r3, lsr #24		/* r3 = ...5 */
1347	orr	r3, r3, ip, lsl #8	/* r3 = 8765 */
1348	mov	ip, ip, lsr #24		/* ip = ...9 */
1349	orr	ip, ip, r1, lsl #8	/* ip = .BA9 */
1350	mov	r1, r1, lsr #8		/* r1 = ...B */
1351	str	r2, [r0, #0x01]
1352	str	r3, [r0, #0x05]
1353	strh	ip, [r0, #0x09]
1354	strb	r1, [r0, #0x0b]
1355	bx	lr
1356	LMEMCPY_C_PAD
1357
1358/*
1359 * 1111: dst is 8-bit aligned (byte 3), src is 8-bit aligned (byte 3)
1360 */
1361	ldrb	r2, [r1]
1362	ldr	r3, [r1, #0x01]
1363	ldr	ip, [r1, #0x05]
1364	strb	r2, [r0]
1365	ldrh	r2, [r1, #0x09]
1366	ldrb	r1, [r1, #0x0b]
1367	str	r3, [r0, #0x01]
1368	str	ip, [r0, #0x05]
1369	strh	r2, [r0, #0x09]
1370	strb	r1, [r0, #0x0b]
1371	bx	lr
1372#endif	/* !_STANDALONE */
1373END(memcpy)
1374
1375	.section .note.GNU-stack,"",%progbits
1376