xref: /freebsd/lib/libc/arm/string/memcpy.S (revision 1d386b48a555f61cb7325543adbbb5c3f3407a66)

/*	$NetBSD: memcpy_xscale.S,v 1.1 2003/10/14 07:51:45 scw Exp $	*/

/*
 * Copyright 2003 Wasabi Systems, Inc.
 * All rights reserved.
 *
 * Written by Steve C. Woodford for Wasabi Systems, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed for the NetBSD Project by
 *      Wasabi Systems, Inc.
 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
 *    or promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <machine/asm.h>
.syntax	unified

/* LINTSTUB: Func: void *memcpy(void *dst, const void *src, size_t len) */
ENTRY(memcpy)
	pld	[r1]
	cmp	r2, #0x0c
	ble	.Lmemcpy_short		/* <= 12 bytes */
	mov	r3, r0			/* We must not clobber r0 */

	/* Word-align the destination buffer */
	ands	ip, r3, #0x03		/* Already word aligned? */
	beq	.Lmemcpy_wordaligned	/* Yup */
	cmp	ip, #0x02
	ldrb	ip, [r1], #0x01
	sub	r2, r2, #0x01
	strb	ip, [r3], #0x01
	ldrble	ip, [r1], #0x01
	suble	r2, r2, #0x01
	strble	ip, [r3], #0x01
	ldrblt	ip, [r1], #0x01
	sublt	r2, r2, #0x01
	strblt	ip, [r3], #0x01

	/* Destination buffer is now word aligned */
.Lmemcpy_wordaligned:
	ands	ip, r1, #0x03		/* Is src also word-aligned? */
	bne	.Lmemcpy_bad_align	/* Nope. Things just got bad */

	/* Quad-align the destination buffer */
	tst	r3, #0x07		/* Already quad aligned? */
	ldrne	ip, [r1], #0x04
	stmfd	sp!, {r4-r9}		/* Free up some registers */
	subne	r2, r2, #0x04
	strne	ip, [r3], #0x04

	/* Destination buffer quad aligned, source is at least word aligned */
	subs	r2, r2, #0x80
	blt	.Lmemcpy_w_lessthan128

	/* Copy 128 bytes at a time */
.Lmemcpy_w_loop128:
	ldr	r4, [r1], #0x04		/* LD:00-03 */
	ldr	r5, [r1], #0x04		/* LD:04-07 */
	pld	[r1, #0x18]		/* Prefetch 0x20 */
	ldr	r6, [r1], #0x04		/* LD:08-0b */
	ldr	r7, [r1], #0x04		/* LD:0c-0f */
	ldr	r8, [r1], #0x04		/* LD:10-13 */
	ldr	r9, [r1], #0x04		/* LD:14-17 */
	strd	r4, [r3], #0x08		/* ST:00-07 */
	ldr	r4, [r1], #0x04		/* LD:18-1b */
	ldr	r5, [r1], #0x04		/* LD:1c-1f */
	strd	r6, [r3], #0x08		/* ST:08-0f */
	ldr	r6, [r1], #0x04		/* LD:20-23 */
	ldr	r7, [r1], #0x04		/* LD:24-27 */
	pld	[r1, #0x18]		/* Prefetch 0x40 */
	strd	r8, [r3], #0x08		/* ST:10-17 */
	ldr	r8, [r1], #0x04		/* LD:28-2b */
	ldr	r9, [r1], #0x04		/* LD:2c-2f */
	strd	r4, [r3], #0x08		/* ST:18-1f */
	ldr	r4, [r1], #0x04		/* LD:30-33 */
	ldr	r5, [r1], #0x04		/* LD:34-37 */
	strd	r6, [r3], #0x08		/* ST:20-27 */
	ldr	r6, [r1], #0x04		/* LD:38-3b */
	ldr	r7, [r1], #0x04		/* LD:3c-3f */
	strd	r8, [r3], #0x08		/* ST:28-2f */
	ldr	r8, [r1], #0x04		/* LD:40-43 */
	ldr	r9, [r1], #0x04		/* LD:44-47 */
	pld	[r1, #0x18]		/* Prefetch 0x60 */
	strd	r4, [r3], #0x08		/* ST:30-37 */
	ldr	r4, [r1], #0x04		/* LD:48-4b */
	ldr	r5, [r1], #0x04		/* LD:4c-4f */
	strd	r6, [r3], #0x08		/* ST:38-3f */
	ldr	r6, [r1], #0x04		/* LD:50-53 */
	ldr	r7, [r1], #0x04		/* LD:54-57 */
	strd	r8, [r3], #0x08		/* ST:40-47 */
	ldr	r8, [r1], #0x04		/* LD:58-5b */
	ldr	r9, [r1], #0x04		/* LD:5c-5f */
	strd	r4, [r3], #0x08		/* ST:48-4f */
	ldr	r4, [r1], #0x04		/* LD:60-63 */
	ldr	r5, [r1], #0x04		/* LD:64-67 */
	pld	[r1, #0x18]		/* Prefetch 0x80 */
	strd	r6, [r3], #0x08		/* ST:50-57 */
	ldr	r6, [r1], #0x04		/* LD:68-6b */
	ldr	r7, [r1], #0x04		/* LD:6c-6f */
	strd	r8, [r3], #0x08		/* ST:58-5f */
	ldr	r8, [r1], #0x04		/* LD:70-73 */
	ldr	r9, [r1], #0x04		/* LD:74-77 */
	strd	r4, [r3], #0x08		/* ST:60-67 */
	ldr	r4, [r1], #0x04		/* LD:78-7b */
	ldr	r5, [r1], #0x04		/* LD:7c-7f */
	strd	r6, [r3], #0x08		/* ST:68-6f */
	strd	r8, [r3], #0x08		/* ST:70-77 */
	subs	r2, r2, #0x80
	strd	r4, [r3], #0x08		/* ST:78-7f */
	bge	.Lmemcpy_w_loop128

.Lmemcpy_w_lessthan128:
	adds	r2, r2, #0x80		/* Adjust for extra sub */
	ldmfdeq	sp!, {r4-r9}
	bxeq	lr			/* Return now if done */
	subs	r2, r2, #0x20
	blt	.Lmemcpy_w_lessthan32

	/* Copy 32 bytes at a time */
.Lmemcpy_w_loop32:
	ldr	r4, [r1], #0x04
	ldr	r5, [r1], #0x04
	pld	[r1, #0x18]
	ldr	r6, [r1], #0x04
	ldr	r7, [r1], #0x04
	ldr	r8, [r1], #0x04
	ldr	r9, [r1], #0x04
	strd	r4, [r3], #0x08
	ldr	r4, [r1], #0x04
	ldr	r5, [r1], #0x04
	strd	r6, [r3], #0x08
	strd	r8, [r3], #0x08
	subs	r2, r2, #0x20
	strd	r4, [r3], #0x08
	bge	.Lmemcpy_w_loop32

.Lmemcpy_w_lessthan32:
	adds	r2, r2, #0x20		/* Adjust for extra sub */
	ldmfdeq	sp!, {r4-r9}
	bxeq	lr			/* Return now if done */

	and	r4, r2, #0x18
	rsbs	r4, r4, #0x18
	addne	pc, pc, r4, lsl #1
	nop

	/* At least 24 bytes remaining */
	ldr	r4, [r1], #0x04
	ldr	r5, [r1], #0x04
	sub	r2, r2, #0x08
	strd	r4, [r3], #0x08

	/* At least 16 bytes remaining */
	ldr	r4, [r1], #0x04
	ldr	r5, [r1], #0x04
	sub	r2, r2, #0x08
	strd	r4, [r3], #0x08

	/* At least 8 bytes remaining */
	ldr	r4, [r1], #0x04
	ldr	r5, [r1], #0x04
	subs	r2, r2, #0x08
	strd	r4, [r3], #0x08

	/* Less than 8 bytes remaining */
	ldmfd	sp!, {r4-r9}
	bxeq	lr			/* Return now if done */
	subs	r2, r2, #0x04
	ldrge	ip, [r1], #0x04
	strge	ip, [r3], #0x04
	bxeq	lr			/* Return now if done */
	addlt	r2, r2, #0x04
	ldrb	ip, [r1], #0x01
	cmp	r2, #0x02
	ldrbge	r2, [r1], #0x01
	strb	ip, [r3], #0x01
	ldrbgt	ip, [r1]
	strbge	r2, [r3], #0x01
	strbgt	ip, [r3]
	bx	lr


/*
 * At this point, it has not been possible to word align both buffers.
 * The destination buffer is word aligned, but the source buffer is not.
 */
.Lmemcpy_bad_align:
	stmfd	sp!, {r4-r7}
	bic	r1, r1, #0x03
	cmp	ip, #2
	ldr	ip, [r1], #0x04
	bgt	.Lmemcpy_bad3
	beq	.Lmemcpy_bad2
	b	.Lmemcpy_bad1

.Lmemcpy_bad1_loop16:
	mov	r4, ip, lsr #8
	ldr	r5, [r1], #0x04
	pld	[r1, #0x018]
	ldr	r6, [r1], #0x04
	ldr	r7, [r1], #0x04
	ldr	ip, [r1], #0x04
	orr	r4, r4, r5, lsl #24
	mov	r5, r5, lsr #8
	orr	r5, r5, r6, lsl #24
	mov	r6, r6, lsr #8
	orr	r6, r6, r7, lsl #24
	mov	r7, r7, lsr #8
	orr	r7, r7, ip, lsl #24
	str	r4, [r3], #0x04
	str	r5, [r3], #0x04
	str	r6, [r3], #0x04
	str	r7, [r3], #0x04
.Lmemcpy_bad1:
	subs	r2, r2, #0x10
	bge	.Lmemcpy_bad1_loop16

	adds	r2, r2, #0x10
	ldmfdeq	sp!, {r4-r7}
	bxeq	lr			/* Return now if done */
	subs	r2, r2, #0x04
	sublt	r1, r1, #0x03
	blt	.Lmemcpy_bad_done

.Lmemcpy_bad1_loop4:
	mov	r4, ip, lsr #8
	ldr	ip, [r1], #0x04
	subs	r2, r2, #0x04
	orr	r4, r4, ip, lsl #24
	str	r4, [r3], #0x04
	bge	.Lmemcpy_bad1_loop4
	sub	r1, r1, #0x03
	b	.Lmemcpy_bad_done

.Lmemcpy_bad2_loop16:
	mov	r4, ip, lsr #16
	ldr	r5, [r1], #0x04
	pld	[r1, #0x018]
	ldr	r6, [r1], #0x04
	ldr	r7, [r1], #0x04
	ldr	ip, [r1], #0x04
	orr	r4, r4, r5, lsl #16
	mov	r5, r5, lsr #16
	orr	r5, r5, r6, lsl #16
	mov	r6, r6, lsr #16
	orr	r6, r6, r7, lsl #16
	mov	r7, r7, lsr #16
	orr	r7, r7, ip, lsl #16
	str	r4, [r3], #0x04
	str	r5, [r3], #0x04
	str	r6, [r3], #0x04
	str	r7, [r3], #0x04
.Lmemcpy_bad2:
	subs	r2, r2, #0x10
	bge	.Lmemcpy_bad2_loop16

	adds	r2, r2, #0x10
	ldmfdeq	sp!, {r4-r7}
	bxeq	lr			/* Return now if done */
	subs	r2, r2, #0x04
	sublt	r1, r1, #0x02
	blt	.Lmemcpy_bad_done

.Lmemcpy_bad2_loop4:
	mov	r4, ip, lsr #16
	ldr	ip, [r1], #0x04
	subs	r2, r2, #0x04
	orr	r4, r4, ip, lsl #16
	str	r4, [r3], #0x04
	bge	.Lmemcpy_bad2_loop4
	sub	r1, r1, #0x02
	b	.Lmemcpy_bad_done

.Lmemcpy_bad3_loop16:
	mov	r4, ip, lsr #24
	ldr	r5, [r1], #0x04
	pld	[r1, #0x018]
	ldr	r6, [r1], #0x04
	ldr	r7, [r1], #0x04
	ldr	ip, [r1], #0x04
	orr	r4, r4, r5, lsl #8
	mov	r5, r5, lsr #24
	orr	r5, r5, r6, lsl #8
	mov	r6, r6, lsr #24
	orr	r6, r6, r7, lsl #8
	mov	r7, r7, lsr #24
	orr	r7, r7, ip, lsl #8
	str	r4, [r3], #0x04
	str	r5, [r3], #0x04
	str	r6, [r3], #0x04
	str	r7, [r3], #0x04
.Lmemcpy_bad3:
	subs	r2, r2, #0x10
	bge	.Lmemcpy_bad3_loop16

	adds	r2, r2, #0x10
	ldmfdeq	sp!, {r4-r7}
	bxeq	lr			/* Return now if done */
	subs	r2, r2, #0x04
	sublt	r1, r1, #0x01
	blt	.Lmemcpy_bad_done

.Lmemcpy_bad3_loop4:
	mov	r4, ip, lsr #24
	ldr	ip, [r1], #0x04
	subs	r2, r2, #0x04
	orr	r4, r4, ip, lsl #8
	str	r4, [r3], #0x04
	bge	.Lmemcpy_bad3_loop4
	sub	r1, r1, #0x01

.Lmemcpy_bad_done:
	ldmfd	sp!, {r4-r7}
	adds	r2, r2, #0x04
	bxeq	lr
	ldrb	ip, [r1], #0x01
	cmp	r2, #0x02
	ldrbge	r2, [r1], #0x01
	strb	ip, [r3], #0x01
	ldrbgt	ip, [r1]
	strbge	r2, [r3], #0x01
	strbgt	ip, [r3]
	bx	lr


/*
 * Handle short copies (less than 16 bytes), possibly misaligned.
 * Some of these are *very* common, thanks to the network stack,
 * and so are handled specially.
 */
.Lmemcpy_short:
#ifndef _STANDALONE
	add	pc, pc, r2, lsl #2
	nop
	bx	lr			/* 0x00 */
	b	.Lmemcpy_bytewise	/* 0x01 */
	b	.Lmemcpy_bytewise	/* 0x02 */
	b	.Lmemcpy_bytewise	/* 0x03 */
	b	.Lmemcpy_4		/* 0x04 */
	b	.Lmemcpy_bytewise	/* 0x05 */
	b	.Lmemcpy_6		/* 0x06 */
	b	.Lmemcpy_bytewise	/* 0x07 */
	b	.Lmemcpy_8		/* 0x08 */
	b	.Lmemcpy_bytewise	/* 0x09 */
	b	.Lmemcpy_bytewise	/* 0x0a */
	b	.Lmemcpy_bytewise	/* 0x0b */
	b	.Lmemcpy_c		/* 0x0c */
#endif
.Lmemcpy_bytewise:
	mov	r3, r0			/* We must not clobber r0 */
	ldrb	ip, [r1], #0x01
1:	subs	r2, r2, #0x01
	strb	ip, [r3], #0x01
	ldrbne	ip, [r1], #0x01
	bne	1b
	bx	lr

#ifndef _STANDALONE
/******************************************************************************
 * Special case for 4 byte copies
 */
#define	LMEMCPY_4_LOG2	6	/* 64 bytes */
#define	LMEMCPY_4_PAD	.align LMEMCPY_4_LOG2
	LMEMCPY_4_PAD
.Lmemcpy_4:
	and	r2, r1, #0x03
	orr	r2, r2, r0, lsl #2
	ands	r2, r2, #0x0f
	sub	r3, pc, #0x14
	addne	pc, r3, r2, lsl #LMEMCPY_4_LOG2

/*
 * 0000: dst is 32-bit aligned, src is 32-bit aligned
 */
	ldr	r2, [r1]
	str	r2, [r0]
	bx	lr
	LMEMCPY_4_PAD

/*
 * 0001: dst is 32-bit aligned, src is 8-bit aligned
 */
	ldr	r3, [r1, #-1]		/* BE:r3 = x012  LE:r3 = 210x */
	ldr	r2, [r1, #3]		/* BE:r2 = 3xxx  LE:r2 = xxx3 */
	mov	r3, r3, lsr #8		/* r3 = .210 */
	orr	r3, r3, r2, lsl #24	/* r3 = 3210 */
	str	r3, [r0]
	bx	lr
	LMEMCPY_4_PAD

/*
 * 0010: dst is 32-bit aligned, src is 16-bit aligned
 */
	ldrh	r3, [r1, #0x02]
	ldrh	r2, [r1]
	orr	r3, r2, r3, lsl #16
	str	r3, [r0]
	bx	lr
	LMEMCPY_4_PAD

/*
 * 0011: dst is 32-bit aligned, src is 8-bit aligned
 */
	ldr	r3, [r1, #-3]		/* BE:r3 = xxx0  LE:r3 = 0xxx */
	ldr	r2, [r1, #1]		/* BE:r2 = 123x  LE:r2 = x321 */
	mov	r3, r3, lsr #24		/* r3 = ...0 */
	orr	r3, r3, r2, lsl #8	/* r3 = 3210 */
	str	r3, [r0]
	bx	lr
	LMEMCPY_4_PAD

/*
 * 0100: dst is 8-bit aligned, src is 32-bit aligned
 */
	ldr	r2, [r1]
	strb	r2, [r0]
	mov	r3, r2, lsr #8
	mov	r1, r2, lsr #24
	strb	r1, [r0, #0x03]
	strh	r3, [r0, #0x01]
	bx	lr
	LMEMCPY_4_PAD

/*
 * 0101: dst is 8-bit aligned, src is 8-bit aligned
 */
	ldrb	r2, [r1]
	ldrh	r3, [r1, #0x01]
	ldrb	r1, [r1, #0x03]
	strb	r2, [r0]
	strh	r3, [r0, #0x01]
	strb	r1, [r0, #0x03]
	bx	lr
	LMEMCPY_4_PAD

/*
 * 0110: dst is 8-bit aligned, src is 16-bit aligned
 */
	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
	ldrh	r3, [r1, #0x02]		/* LE:r3 = ..23  LE:r3 = ..32 */
	strb	r2, [r0]
	mov	r2, r2, lsr #8		/* r2 = ...1 */
	orr	r2, r2, r3, lsl #8	/* r2 = .321 */
	mov	r3, r3, lsr #8		/* r3 = ...3 */
	strh	r2, [r0, #0x01]
	strb	r3, [r0, #0x03]
	bx	lr
	LMEMCPY_4_PAD

/*
 * 0111: dst is 8-bit aligned, src is 8-bit aligned
 */
	ldrb	r2, [r1]
	ldrh	r3, [r1, #0x01]
	ldrb	r1, [r1, #0x03]
	strb	r2, [r0]
	strh	r3, [r0, #0x01]
	strb	r1, [r0, #0x03]
	bx	lr
	LMEMCPY_4_PAD

/*
 * 1000: dst is 16-bit aligned, src is 32-bit aligned
 */
	ldr	r2, [r1]
	strh	r2, [r0]
	mov	r3, r2, lsr #16
	strh	r3, [r0, #0x02]
	bx	 lr
	LMEMCPY_4_PAD

/*
 * 1001: dst is 16-bit aligned, src is 8-bit aligned
 */
	ldr	r2, [r1, #-1]		/* BE:r2 = x012  LE:r2 = 210x */
	ldr	r3, [r1, #3]		/* BE:r3 = 3xxx  LE:r3 = xxx3 */
	mov	r1, r2, lsr #8		/* BE:r1 = .x01  LE:r1 = .210 */
	strh	r1, [r0]
	mov	r2, r2, lsr #24		/* r2 = ...2 */
	orr	r2, r2, r3, lsl #8	/* r2 = xx32 */
	strh	r2, [r0, #0x02]
	bx	lr
	LMEMCPY_4_PAD

/*
 * 1010: dst is 16-bit aligned, src is 16-bit aligned
 */
	ldrh	r2, [r1]
	ldrh	r3, [r1, #0x02]
	strh	r2, [r0]
	strh	r3, [r0, #0x02]
	bx	lr
	LMEMCPY_4_PAD

/*
 * 1011: dst is 16-bit aligned, src is 8-bit aligned
 */
	ldr	r3, [r1, #1]		/* BE:r3 = 123x  LE:r3 = x321 */
	ldr	r2, [r1, #-3]		/* BE:r2 = xxx0  LE:r2 = 0xxx */
	mov	r1, r3, lsr #8		/* BE:r1 = .123  LE:r1 = .x32 */
	strh	r1, [r0, #0x02]
	mov	r3, r3, lsl #8		/* r3 = 321. */
	orr	r3, r3, r2, lsr #24	/* r3 = 3210 */
	strh	r3, [r0]
	bx	lr
	LMEMCPY_4_PAD

/*
 * 1100: dst is 8-bit aligned, src is 32-bit aligned
 */
	ldr	r2, [r1]		/* BE:r2 = 0123  LE:r2 = 3210 */
	strb	r2, [r0]
	mov	r3, r2, lsr #8
	mov	r1, r2, lsr #24
	strh	r3, [r0, #0x01]
	strb	r1, [r0, #0x03]
	bx	lr
	LMEMCPY_4_PAD

/*
 * 1101: dst is 8-bit aligned, src is 8-bit aligned
 */
	ldrb	r2, [r1]
	ldrh	r3, [r1, #0x01]
	ldrb	r1, [r1, #0x03]
	strb	r2, [r0]
	strh	r3, [r0, #0x01]
	strb	r1, [r0, #0x03]
	bx	lr
	LMEMCPY_4_PAD

/*
 * 1110: dst is 8-bit aligned, src is 16-bit aligned
 */
	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
	ldrh	r3, [r1, #0x02]		/* BE:r3 = ..23  LE:r3 = ..32 */
	strb	r2, [r0]
	mov	r2, r2, lsr #8		/* r2 = ...1 */
	orr	r2, r2, r3, lsl #8	/* r2 = .321 */
	strh	r2, [r0, #0x01]
	mov	r3, r3, lsr #8		/* r3 = ...3 */
	strb	r3, [r0, #0x03]
	bx	lr
	LMEMCPY_4_PAD

/*
 * 1111: dst is 8-bit aligned, src is 8-bit aligned
 */
	ldrb	r2, [r1]
	ldrh	r3, [r1, #0x01]
	ldrb	r1, [r1, #0x03]
	strb	r2, [r0]
	strh	r3, [r0, #0x01]
	strb	r1, [r0, #0x03]
	bx	lr
	LMEMCPY_4_PAD


/******************************************************************************
 * Special case for 6 byte copies
 */
#define	LMEMCPY_6_LOG2	6	/* 64 bytes */
#define	LMEMCPY_6_PAD	.align LMEMCPY_6_LOG2
	LMEMCPY_6_PAD
.Lmemcpy_6:
	and	r2, r1, #0x03
	orr	r2, r2, r0, lsl #2
	ands	r2, r2, #0x0f
	sub	r3, pc, #0x14
	addne	pc, r3, r2, lsl #LMEMCPY_6_LOG2

/*
 * 0000: dst is 32-bit aligned, src is 32-bit aligned
 */
	ldr	r2, [r1]
	ldrh	r3, [r1, #0x04]
	str	r2, [r0]
	strh	r3, [r0, #0x04]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 0001: dst is 32-bit aligned, src is 8-bit aligned
 */
	ldr	r2, [r1, #-1]		/* BE:r2 = x012  LE:r2 = 210x */
	ldr	r3, [r1, #0x03]		/* BE:r3 = 345x  LE:r3 = x543 */
	mov	r2, r2, lsr #8		/* r2 = .210 */
	orr	r2, r2, r3, lsl #24	/* r2 = 3210 */
	mov	r3, r3, lsr #8		/* BE:r3 = .345  LE:r3 = .x54 */
	str	r2, [r0]
	strh	r3, [r0, #0x04]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 0010: dst is 32-bit aligned, src is 16-bit aligned
 */
	ldr	r3, [r1, #0x02]		/* BE:r3 = 2345  LE:r3 = 5432 */
	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
	mov	r1, r3, lsr #16		/* r1 = ..54 */
	orr	r2, r2, r3, lsl #16	/* r2 = 3210 */
	str	r2, [r0]
	strh	r1, [r0, #0x04]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 0011: dst is 32-bit aligned, src is 8-bit aligned
 */
	ldr	r2, [r1, #-3]		/* BE:r2 = xxx0  LE:r2 = 0xxx */
	ldr	r3, [r1, #1]		/* BE:r3 = 1234  LE:r3 = 4321 */
	ldr	r1, [r1, #5]		/* BE:r1 = 5xxx  LE:r3 = xxx5 */
	mov	r2, r2, lsr #24		/* r2 = ...0 */
	orr	r2, r2, r3, lsl #8	/* r2 = 3210 */
	mov	r1, r1, lsl #8		/* r1 = xx5. */
	orr	r1, r1, r3, lsr #24	/* r1 = xx54 */
	str	r2, [r0]
	strh	r1, [r0, #0x04]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 0100: dst is 8-bit aligned, src is 32-bit aligned
 */
	ldr	r3, [r1]		/* BE:r3 = 0123  LE:r3 = 3210 */
	ldrh	r2, [r1, #0x04]		/* BE:r2 = ..45  LE:r2 = ..54 */
	mov	r1, r3, lsr #8		/* BE:r1 = .012  LE:r1 = .321 */
	strh	r1, [r0, #0x01]
	strb	r3, [r0]
	mov	r3, r3, lsr #24		/* r3 = ...3 */
	orr	r3, r3, r2, lsl #8	/* r3 = .543 */
	mov	r2, r2, lsr #8		/* r2 = ...5 */
	strh	r3, [r0, #0x03]
	strb	r2, [r0, #0x05]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 0101: dst is 8-bit aligned, src is 8-bit aligned
 */
	ldrb	r2, [r1]
	ldrh	r3, [r1, #0x01]
	ldrh	ip, [r1, #0x03]
	ldrb	r1, [r1, #0x05]
	strb	r2, [r0]
	strh	r3, [r0, #0x01]
	strh	ip, [r0, #0x03]
	strb	r1, [r0, #0x05]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 0110: dst is 8-bit aligned, src is 16-bit aligned
 */
	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
	ldr	r1, [r1, #0x02]		/* BE:r1 = 2345  LE:r1 = 5432 */
	strb	r2, [r0]
	mov	r3, r1, lsr #24
	strb	r3, [r0, #0x05]
	mov	r3, r1, lsr #8		/* r3 = .543 */
	strh	r3, [r0, #0x03]
	mov	r3, r2, lsr #8		/* r3 = ...1 */
	orr	r3, r3, r1, lsl #8	/* r3 = 4321 */
	strh	r3, [r0, #0x01]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 0111: dst is 8-bit aligned, src is 8-bit aligned
 */
	ldrb	r2, [r1]
	ldrh	r3, [r1, #0x01]
	ldrh	ip, [r1, #0x03]
	ldrb	r1, [r1, #0x05]
	strb	r2, [r0]
	strh	r3, [r0, #0x01]
	strh	ip, [r0, #0x03]
	strb	r1, [r0, #0x05]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 1000: dst is 16-bit aligned, src is 32-bit aligned
 */
	ldrh	r2, [r1, #0x04]		/* r2 = ..54 */
	ldr	r3, [r1]		/* r3 = 3210 */
	mov	r2, r2, lsl #16		/* r2 = 54.. */
	orr	r2, r2, r3, lsr #16	/* r2 = 5432 */
	strh	r3, [r0]
	str	r2, [r0, #0x02]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 1001: dst is 16-bit aligned, src is 8-bit aligned
 */
	ldr	r3, [r1, #-1]		/* BE:r3 = x012  LE:r3 = 210x */
	ldr	r2, [r1, #3]		/* BE:r2 = 345x  LE:r2 = x543 */
	mov	r1, r3, lsr #8		/* BE:r1 = .x01  LE:r1 = .210 */
	mov	r2, r2, lsl #8		/* r2 = 543. */
	orr	r2, r2, r3, lsr #24	/* r2 = 5432 */
	strh	r1, [r0]
	str	r2, [r0, #0x02]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 1010: dst is 16-bit aligned, src is 16-bit aligned
 */
	ldrh	r2, [r1]
	ldr	r3, [r1, #0x02]
	strh	r2, [r0]
	str	r3, [r0, #0x02]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 1011: dst is 16-bit aligned, src is 8-bit aligned
 */
	ldrb	r3, [r1]		/* r3 = ...0 */
	ldr	r2, [r1, #0x01]		/* BE:r2 = 1234  LE:r2 = 4321 */
	ldrb	r1, [r1, #0x05]		/* r1 = ...5 */
	orr	r3, r3, r2, lsl #8	/* r3 = 3210 */
	mov	r1, r1, lsl #24		/* r1 = 5... */
	orr	r1, r1, r2, lsr #8	/* r1 = 5432 */
	strh	r3, [r0]
	str	r1, [r0, #0x02]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 1100: dst is 8-bit aligned, src is 32-bit aligned
 */
	ldr	r2, [r1]		/* BE:r2 = 0123  LE:r2 = 3210 */
	ldrh	r1, [r1, #0x04]		/* BE:r1 = ..45  LE:r1 = ..54 */
	strb	r2, [r0]
	mov	r2, r2, lsr #8		/* r2 = .321 */
	orr	r2, r2, r1, lsl #24	/* r2 = 4321 */
	mov	r1, r1, lsr #8		/* r1 = ...5 */
	str	r2, [r0, #0x01]
	strb	r1, [r0, #0x05]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 1101: dst is 8-bit aligned, src is 8-bit aligned
 */
	ldrb	r2, [r1]
	ldrh	r3, [r1, #0x01]
	ldrh	ip, [r1, #0x03]
	ldrb	r1, [r1, #0x05]
	strb	r2, [r0]
	strh	r3, [r0, #0x01]
	strh	ip, [r0, #0x03]
	strb	r1, [r0, #0x05]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 1110: dst is 8-bit aligned, src is 16-bit aligned
 */
	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
	ldr	r1, [r1, #0x02]		/* BE:r1 = 2345  LE:r1 = 5432 */
	strb	r2, [r0]
	mov	r2, r2, lsr #8		/* r2 = ...1 */
	orr	r2, r2, r1, lsl #8	/* r2 = 4321 */
	mov	r1, r1, lsr #24		/* r1 = ...5 */
	str	r2, [r0, #0x01]
	strb	r1, [r0, #0x05]
	bx	lr
	LMEMCPY_6_PAD

/*
 * 1111: dst is 8-bit aligned, src is 8-bit aligned
 */
	ldrb	r2, [r1]
	ldr	r3, [r1, #0x01]
	ldrb	r1, [r1, #0x05]
	strb	r2, [r0]
	str	r3, [r0, #0x01]
	strb	r1, [r0, #0x05]
	bx	lr
	LMEMCPY_6_PAD


/******************************************************************************
 * Special case for 8 byte copies
 */
#define	LMEMCPY_8_LOG2	6	/* 64 bytes */
#define	LMEMCPY_8_PAD	.align LMEMCPY_8_LOG2
	LMEMCPY_8_PAD
.Lmemcpy_8:
	and	r2, r1, #0x03
	orr	r2, r2, r0, lsl #2
	ands	r2, r2, #0x0f
	sub	r3, pc, #0x14
	addne	pc, r3, r2, lsl #LMEMCPY_8_LOG2

/*
 * 0000: dst is 32-bit aligned, src is 32-bit aligned
 */
	ldr	r2, [r1]
	ldr	r3, [r1, #0x04]
	str	r2, [r0]
	str	r3, [r0, #0x04]
	bx	lr
	LMEMCPY_8_PAD

/*
 * 0001: dst is 32-bit aligned, src is 8-bit aligned
 */
	ldr	r3, [r1, #-1]		/* BE:r3 = x012  LE:r3 = 210x */
	ldr	r2, [r1, #0x03]		/* BE:r2 = 3456  LE:r2 = 6543 */
	ldrb	r1, [r1, #0x07]		/* r1 = ...7 */
	mov	r3, r3, lsr #8		/* r3 = .210 */
	orr	r3, r3, r2, lsl #24	/* r3 = 3210 */
	mov	r1, r1, lsl #24		/* r1 = 7... */
	orr	r2, r1, r2, lsr #8	/* r2 = 7654 */
	str	r3, [r0]
	str	r2, [r0, #0x04]
	bx	lr
	LMEMCPY_8_PAD

/*
 * 0010: dst is 32-bit aligned, src is 16-bit aligned
 */
	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
	ldr	r3, [r1, #0x02]		/* BE:r3 = 2345  LE:r3 = 5432 */
	ldrh	r1, [r1, #0x06]		/* BE:r1 = ..67  LE:r1 = ..76 */
	orr	r2, r2, r3, lsl #16	/* r2 = 3210 */
	mov	r3, r3, lsr #16		/* r3 = ..54 */
	orr	r3, r3, r1, lsl #16	/* r3 = 7654 */
	str	r2, [r0]
	str	r3, [r0, #0x04]
	bx	lr
	LMEMCPY_8_PAD

/*
 * 0011: dst is 32-bit aligned, src is 8-bit aligned
 */
	ldrb	r3, [r1]		/* r3 = ...0 */
	ldr	r2, [r1, #0x01]		/* BE:r2 = 1234  LE:r2 = 4321 */
	ldr	r1, [r1, #0x05]		/* BE:r1 = 567x  LE:r1 = x765 */
	orr	r3, r3, r2, lsl #8	/* r3 = 3210 */
	mov	r2, r2, lsr #24		/* r2 = ...4 */
	orr	r2, r2, r1, lsl #8	/* r2 = 7654 */
	str	r3, [r0]
	str	r2, [r0, #0x04]
	bx	lr
	LMEMCPY_8_PAD

/*
 * 0100: dst is 8-bit aligned, src is 32-bit aligned
 */
	ldr	r3, [r1]		/* BE:r3 = 0123  LE:r3 = 3210 */
	ldr	r2, [r1, #0x04]		/* BE:r2 = 4567  LE:r2 = 7654 */
	strb	r3, [r0]
	mov	r1, r2, lsr #24		/* r1 = ...7 */
	strb	r1, [r0, #0x07]
	mov	r1, r3, lsr #8		/* r1 = .321 */
	mov	r3, r3, lsr #24		/* r3 = ...3 */
	orr	r3, r3, r2, lsl #8	/* r3 = 6543 */
	strh	r1, [r0, #0x01]
	str	r3, [r0, #0x03]
	bx	lr
	LMEMCPY_8_PAD

/*
 * 0101: dst is 8-bit aligned, src is 8-bit aligned
 */
	ldrb	r2, [r1]
	ldrh	r3, [r1, #0x01]
	ldr	ip, [r1, #0x03]
	ldrb	r1, [r1, #0x07]
	strb	r2, [r0]
	strh	r3, [r0, #0x01]
	str	ip, [r0, #0x03]
	strb	r1, [r0, #0x07]
	bx	lr
	LMEMCPY_8_PAD

/*
 * 0110: dst is 8-bit aligned, src is 16-bit aligned
 */
	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
	ldr	r3, [r1, #0x02]		/* BE:r3 = 2345  LE:r3 = 5432 */
	ldrh	r1, [r1, #0x06]		/* BE:r1 = ..67  LE:r1 = ..76 */
	strb	r2, [r0]		/* 0 */
	mov	ip, r1, lsr #8		/* ip = ...7 */
	strb	ip, [r0, #0x07]		/* 7 */
	mov	ip, r2, lsr #8		/* ip = ...1 */
	orr	ip, ip, r3, lsl #8	/* ip = 4321 */
	mov	r3, r3, lsr #8		/* r3 = .543 */
	orr	r3, r3, r1, lsl #24	/* r3 = 6543 */
	strh	ip, [r0, #0x01]
	str	r3, [r0, #0x03]
	bx	lr
	LMEMCPY_8_PAD

/*
 * 0111: dst is 8-bit aligned, src is 8-bit aligned
 */
	ldrb	r3, [r1]		/* r3 = ...0 */
	ldr	ip, [r1, #0x01]		/* BE:ip = 1234  LE:ip = 4321 */
	ldrh	r2, [r1, #0x05]		/* BE:r2 = ..56  LE:r2 = ..65 */
	ldrb	r1, [r1, #0x07]		/* r1 = ...7 */
	strb	r3, [r0]
	mov	r3, ip, lsr #16		/* BE:r3 = ..12  LE:r3 = ..43 */
	strh	ip, [r0, #0x01]
	orr	r2, r3, r2, lsl #16	/* r2 = 6543 */
	str	r2, [r0, #0x03]
	strb	r1, [r0, #0x07]
	bx	lr
	LMEMCPY_8_PAD

/*
 * 1000: dst is 16-bit aligned, src is 32-bit aligned
 */
	ldr	r2, [r1]		/* BE:r2 = 0123  LE:r2 = 3210 */
	ldr	r3, [r1, #0x04]		/* BE:r3 = 4567  LE:r3 = 7654 */
	mov	r1, r2, lsr #16		/* BE:r1 = ..01  LE:r1 = ..32 */
	strh	r2, [r0]
	orr	r2, r1, r3, lsl #16	/* r2 = 5432 */
	mov	r3, r3, lsr #16		/* r3 = ..76 */
	str	r2, [r0, #0x02]
	strh	r3, [r0, #0x06]
	bx	lr
	LMEMCPY_8_PAD

/*
 * 1001: dst is 16-bit aligned, src is 8-bit aligned
 */
	ldr	r2, [r1, #-1]		/* BE:r2 = x012  LE:r2 = 210x */
	ldr	r3, [r1, #0x03]		/* BE:r3 = 3456  LE:r3 = 6543 */
	ldrb	ip, [r1, #0x07]		/* ip = ...7 */
	mov	r1, r2, lsr #8		/* BE:r1 = .x01  LE:r1 = .210 */
	strh	r1, [r0]
	mov	r1, r2, lsr #24		/* r1 = ...2 */
	orr	r1, r1, r3, lsl #8	/* r1 = 5432 */
	mov	r3, r3, lsr #24		/* r3 = ...6 */
	orr	r3, r3, ip, lsl #8	/* r3 = ..76 */
	str	r1, [r0, #0x02]
	strh	r3, [r0, #0x06]
	bx	lr
	LMEMCPY_8_PAD

/*
 * 1010: dst is 16-bit aligned, src is 16-bit aligned
 */
	ldrh	r2, [r1]
	ldr	ip, [r1, #0x02]
	ldrh	r3, [r1, #0x06]
	strh	r2, [r0]
	str	ip, [r0, #0x02]
	strh	r3, [r0, #0x06]
	bx	lr
	LMEMCPY_8_PAD

/*
 * 1011: dst is 16-bit aligned, src is 8-bit aligned
 */
	ldr	r3, [r1, #0x05]		/* BE:r3 = 567x  LE:r3 = x765 */
	ldr	r2, [r1, #0x01]		/* BE:r2 = 1234  LE:r2 = 4321 */
	ldrb	ip, [r1]		/* ip = ...0 */
	mov	r1, r3, lsr #8		/* BE:r1 = .567  LE:r1 = .x76 */
	strh	r1, [r0, #0x06]
	mov	r3, r3, lsl #24		/* r3 = 5... */
	orr	r3, r3, r2, lsr #8	/* r3 = 5432 */
	orr	r2, ip, r2, lsl #8	/* r2 = 3210 */
	str	r3, [r0, #0x02]
	strh	r2, [r0]
	bx	lr
	LMEMCPY_8_PAD

/*
 * 1100: dst is 8-bit aligned, src is 32-bit aligned
 */
	ldr	r3, [r1, #0x04]		/* BE:r3 = 4567  LE:r3 = 7654 */
	ldr	r2, [r1]		/* BE:r2 = 0123  LE:r2 = 3210 */
	mov	r1, r3, lsr #8		/* BE:r1 = .456  LE:r1 = .765 */
	strh	r1, [r0, #0x05]
	strb	r2, [r0]
	mov	r1, r3, lsr #24		/* r1 = ...7 */
	strb	r1, [r0, #0x07]
	mov	r2, r2, lsr #8		/* r2 = .321 */
	orr	r2, r2, r3, lsl #24	/* r2 = 4321 */
	str	r2, [r0, #0x01]
	bx	 lr
	LMEMCPY_8_PAD

/*
 * 1101: dst is 8-bit aligned, src is 8-bit aligned
 */
	ldrb	r3, [r1]		/* r3 = ...0 */
	ldrh	r2, [r1, #0x01]		/* BE:r2 = ..12  LE:r2 = ..21 */
	ldr	ip, [r1, #0x03]		/* BE:ip = 3456  LE:ip = 6543 */
	ldrb	r1, [r1, #0x07]		/* r1 = ...7 */
	strb	r3, [r0]
	mov	r3, ip, lsr #16		/* BE:r3 = ..34  LE:r3 = ..65 */
	strh	r3, [r0, #0x05]
	orr	r2, r2, ip, lsl #16	/* r2 = 4321 */
	str	r2, [r0, #0x01]
	strb	r1, [r0, #0x07]
	bx	lr
	LMEMCPY_8_PAD

/*
 * 1110: dst is 8-bit aligned, src is 16-bit aligned
 */
	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
	ldr	r3, [r1, #0x02]		/* BE:r3 = 2345  LE:r3 = 5432 */
	ldrh	r1, [r1, #0x06]		/* BE:r1 = ..67  LE:r1 = ..76 */
	strb	r2, [r0]
	mov	ip, r2, lsr #8		/* ip = ...1 */
	orr	ip, ip, r3, lsl #8	/* ip = 4321 */
	mov	r2, r1, lsr #8		/* r2 = ...7 */
	strb	r2, [r0, #0x07]
	mov	r1, r1, lsl #8		/* r1 = .76. */
	orr	r1, r1, r3, lsr #24	/* r1 = .765 */
	str	ip, [r0, #0x01]
	strh	r1, [r0, #0x05]
	bx	lr
	LMEMCPY_8_PAD

/*
 * 1111: dst is 8-bit aligned, src is 8-bit aligned
 */
	ldrb	r2, [r1]
	ldr	ip, [r1, #0x01]
	ldrh	r3, [r1, #0x05]
	ldrb	r1, [r1, #0x07]
	strb	r2, [r0]
	str	ip, [r0, #0x01]
	strh	r3, [r0, #0x05]
	strb	r1, [r0, #0x07]
	bx	lr
	LMEMCPY_8_PAD

/******************************************************************************
 * Special case for 12 byte copies
 */
#define	LMEMCPY_C_LOG2	7	/* 128 bytes */
#define	LMEMCPY_C_PAD	.align LMEMCPY_C_LOG2
	LMEMCPY_C_PAD
.Lmemcpy_c:
	and	r2, r1, #0x03
	orr	r2, r2, r0, lsl #2
	ands	r2, r2, #0x0f
	sub	r3, pc, #0x14
	addne	pc, r3, r2, lsl #LMEMCPY_C_LOG2

/*
 * 0000: dst is 32-bit aligned, src is 32-bit aligned
 */
	ldr	r2, [r1]
	ldr	r3, [r1, #0x04]
	ldr	r1, [r1, #0x08]
	str	r2, [r0]
	str	r3, [r0, #0x04]
	str	r1, [r0, #0x08]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 0001: dst is 32-bit aligned, src is 8-bit aligned
 */
	ldrb	r2, [r1, #0xb]		/* r2 = ...B */
	ldr	ip, [r1, #0x07]		/* BE:ip = 789A  LE:ip = A987 */
	ldr	r3, [r1, #0x03]		/* BE:r3 = 3456  LE:r3 = 6543 */
	ldr	r1, [r1, #-1]		/* BE:r1 = x012  LE:r1 = 210x */
	mov	r2, r2, lsl #24		/* r2 = B... */
	orr	r2, r2, ip, lsr #8	/* r2 = BA98 */
	str	r2, [r0, #0x08]
	mov	r2, ip, lsl #24		/* r2 = 7... */
	orr	r2, r2, r3, lsr #8	/* r2 = 7654 */
	mov	r1, r1, lsr #8		/* r1 = .210 */
	orr	r1, r1, r3, lsl #24	/* r1 = 3210 */
	str	r2, [r0, #0x04]
	str	r1, [r0]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 0010: dst is 32-bit aligned, src is 16-bit aligned
 */
	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
	ldr	r3, [r1, #0x02]		/* BE:r3 = 2345  LE:r3 = 5432 */
	ldr	ip, [r1, #0x06]		/* BE:ip = 6789  LE:ip = 9876 */
	ldrh	r1, [r1, #0x0a]		/* BE:r1 = ..AB  LE:r1 = ..BA */
	orr	r2, r2, r3, lsl #16	/* r2 = 3210 */
	str	r2, [r0]
	mov	r3, r3, lsr #16		/* r3 = ..54 */
	orr	r3, r3, ip, lsl #16	/* r3 = 7654 */
	mov	r1, r1, lsl #16		/* r1 = BA.. */
	orr	r1, r1, ip, lsr #16	/* r1 = BA98 */
	str	r3, [r0, #0x04]
	str	r1, [r0, #0x08]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 0011: dst is 32-bit aligned, src is 8-bit aligned
 */
	ldrb	r2, [r1]		/* r2 = ...0 */
	ldr	r3, [r1, #0x01]		/* BE:r3 = 1234  LE:r3 = 4321 */
	ldr	ip, [r1, #0x05]		/* BE:ip = 5678  LE:ip = 8765 */
	ldr	r1, [r1, #0x09]		/* BE:r1 = 9ABx  LE:r1 = xBA9 */
	orr	r2, r2, r3, lsl #8	/* r2 = 3210 */
	str	r2, [r0]
	mov	r3, r3, lsr #24		/* r3 = ...4 */
	orr	r3, r3, ip, lsl #8	/* r3 = 7654 */
	mov	r1, r1, lsl #8		/* r1 = BA9. */
	orr	r1, r1, ip, lsr #24	/* r1 = BA98 */
	str	r3, [r0, #0x04]
	str	r1, [r0, #0x08]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 0100: dst is 8-bit aligned (byte 1), src is 32-bit aligned
 */
	ldr	r2, [r1]		/* BE:r2 = 0123  LE:r2 = 3210 */
	ldr	r3, [r1, #0x04]		/* BE:r3 = 4567  LE:r3 = 7654 */
	ldr	ip, [r1, #0x08]		/* BE:ip = 89AB  LE:ip = BA98 */
	mov	r1, r2, lsr #8		/* BE:r1 = .012  LE:r1 = .321 */
	strh	r1, [r0, #0x01]
	strb	r2, [r0]
	mov	r1, r2, lsr #24		/* r1 = ...3 */
	orr	r2, r1, r3, lsl #8	/* r1 = 6543 */
	mov	r1, r3, lsr #24		/* r1 = ...7 */
	orr	r1, r1, ip, lsl #8	/* r1 = A987 */
	mov	ip, ip, lsr #24		/* ip = ...B */
	str	r2, [r0, #0x03]
	str	r1, [r0, #0x07]
	strb	ip, [r0, #0x0b]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 0101: dst is 8-bit aligned (byte 1), src is 8-bit aligned (byte 1)
 */
	ldrb	r2, [r1]
	ldrh	r3, [r1, #0x01]
	ldr	ip, [r1, #0x03]
	strb	r2, [r0]
	ldr	r2, [r1, #0x07]
	ldrb	r1, [r1, #0x0b]
	strh	r3, [r0, #0x01]
	str	ip, [r0, #0x03]
	str	r2, [r0, #0x07]
	strb	r1, [r0, #0x0b]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 0110: dst is 8-bit aligned (byte 1), src is 16-bit aligned
 */
	ldrh	r2, [r1]		/* BE:r2 = ..01  LE:r2 = ..10 */
	ldr	r3, [r1, #0x02]		/* BE:r3 = 2345  LE:r3 = 5432 */
	ldr	ip, [r1, #0x06]		/* BE:ip = 6789  LE:ip = 9876 */
	ldrh	r1, [r1, #0x0a]		/* BE:r1 = ..AB  LE:r1 = ..BA */
	strb	r2, [r0]
	mov	r2, r2, lsr #8		/* r2 = ...1 */
	orr	r2, r2, r3, lsl #8	/* r2 = 4321 */
	strh	r2, [r0, #0x01]
	mov	r2, r3, lsr #8		/* r2 = .543 */
	orr	r3, r2, ip, lsl #24	/* r3 = 6543 */
	mov	r2, ip, lsr #8		/* r2 = .987 */
	orr	r2, r2, r1, lsl #24	/* r2 = A987 */
	mov	r1, r1, lsr #8		/* r1 = ...B */
	str	r3, [r0, #0x03]
	str	r2, [r0, #0x07]
	strb	r1, [r0, #0x0b]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 0111: dst is 8-bit aligned (byte 1), src is 8-bit aligned (byte 3)
 */
	ldrb	r2, [r1]
	ldr	r3, [r1, #0x01]		/* BE:r3 = 1234  LE:r3 = 4321 */
	ldr	ip, [r1, #0x05]		/* BE:ip = 5678  LE:ip = 8765 */
	ldr	r1, [r1, #0x09]		/* BE:r1 = 9ABx  LE:r1 = xBA9 */
	strb	r2, [r0]
	strh	r3, [r0, #0x01]
	mov	r3, r3, lsr #16		/* r3 = ..43 */
	orr	r3, r3, ip, lsl #16	/* r3 = 6543 */
	mov	ip, ip, lsr #16		/* ip = ..87 */
	orr	ip, ip, r1, lsl #16	/* ip = A987 */
	mov	r1, r1, lsr #16		/* r1 = ..xB */
	str	r3, [r0, #0x03]
	str	ip, [r0, #0x07]
	strb	r1, [r0, #0x0b]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 1000: dst is 16-bit aligned, src is 32-bit aligned
 */
	ldr	ip, [r1]		/* BE:ip = 0123  LE:ip = 3210 */
	ldr	r3, [r1, #0x04]		/* BE:r3 = 4567  LE:r3 = 7654 */
	ldr	r2, [r1, #0x08]		/* BE:r2 = 89AB  LE:r2 = BA98 */
	mov	r1, ip, lsr #16		/* BE:r1 = ..01  LE:r1 = ..32 */
	strh	ip, [r0]
	orr	r1, r1, r3, lsl #16	/* r1 = 5432 */
	mov	r3, r3, lsr #16		/* r3 = ..76 */
	orr	r3, r3, r2, lsl #16	/* r3 = 9876 */
	mov	r2, r2, lsr #16		/* r2 = ..BA */
	str	r1, [r0, #0x02]
	str	r3, [r0, #0x06]
	strh	r2, [r0, #0x0a]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 1001: dst is 16-bit aligned, src is 8-bit aligned (byte 1)
 */
	ldr	r2, [r1, #-1]		/* BE:r2 = x012  LE:r2 = 210x */
	ldr	r3, [r1, #0x03]		/* BE:r3 = 3456  LE:r3 = 6543 */
	mov	ip, r2, lsr #8		/* BE:ip = .x01  LE:ip = .210 */
	strh	ip, [r0]
	ldr	ip, [r1, #0x07]		/* BE:ip = 789A  LE:ip = A987 */
	ldrb	r1, [r1, #0x0b]		/* r1 = ...B */
	mov	r2, r2, lsr #24		/* r2 = ...2 */
	orr	r2, r2, r3, lsl #8	/* r2 = 5432 */
	mov	r3, r3, lsr #24		/* r3 = ...6 */
	orr	r3, r3, ip, lsl #8	/* r3 = 9876 */
	mov	r1, r1, lsl #8		/* r1 = ..B. */
	orr	r1, r1, ip, lsr #24	/* r1 = ..BA */
	str	r2, [r0, #0x02]
	str	r3, [r0, #0x06]
	strh	r1, [r0, #0x0a]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 1010: dst is 16-bit aligned, src is 16-bit aligned
 */
	ldrh	r2, [r1]
	ldr	r3, [r1, #0x02]
	ldr	ip, [r1, #0x06]
	ldrh	r1, [r1, #0x0a]
	strh	r2, [r0]
	str	r3, [r0, #0x02]
	str	ip, [r0, #0x06]
	strh	r1, [r0, #0x0a]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 1011: dst is 16-bit aligned, src is 8-bit aligned (byte 3)
 */
	ldr	r2, [r1, #0x09]		/* BE:r2 = 9ABx  LE:r2 = xBA9 */
	ldr	r3, [r1, #0x05]		/* BE:r3 = 5678  LE:r3 = 8765 */
	mov	ip, r2, lsr #8		/* BE:ip = .9AB  LE:ip = .xBA */
	strh	ip, [r0, #0x0a]
	ldr	ip, [r1, #0x01]		/* BE:ip = 1234  LE:ip = 4321 */
	ldrb	r1, [r1]		/* r1 = ...0 */
	mov	r2, r2, lsl #24		/* r2 = 9... */
	orr	r2, r2, r3, lsr #8	/* r2 = 9876 */
	mov	r3, r3, lsl #24		/* r3 = 5... */
	orr	r3, r3, ip, lsr #8	/* r3 = 5432 */
	orr	r1, r1, ip, lsl #8	/* r1 = 3210 */
	str	r2, [r0, #0x06]
	str	r3, [r0, #0x02]
	strh	r1, [r0]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 1100: dst is 8-bit aligned (byte 3), src is 32-bit aligned
 */
	ldr	r2, [r1]		/* BE:r2 = 0123  LE:r2 = 3210 */
	ldr	ip, [r1, #0x04]		/* BE:ip = 4567  LE:ip = 7654 */
	ldr	r1, [r1, #0x08]		/* BE:r1 = 89AB  LE:r1 = BA98 */
	strb	r2, [r0]
	mov	r3, r2, lsr #8		/* r3 = .321 */
	orr	r3, r3, ip, lsl #24	/* r3 = 4321 */
	str	r3, [r0, #0x01]
	mov	r3, ip, lsr #8		/* r3 = .765 */
	orr	r3, r3, r1, lsl #24	/* r3 = 8765 */
	str	r3, [r0, #0x05]
	mov	r1, r1, lsr #8		/* r1 = .BA9 */
	strh	r1, [r0, #0x09]
	mov	r1, r1, lsr #16		/* r1 = ...B */
	strb	r1, [r0, #0x0b]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 1101: dst is 8-bit aligned (byte 3), src is 8-bit aligned (byte 1)
 */
	ldrb	r2, [r1, #0x0b]		/* r2 = ...B */
	ldr	r3, [r1, #0x07]		/* BE:r3 = 789A  LE:r3 = A987 */
	ldr	ip, [r1, #0x03]		/* BE:ip = 3456  LE:ip = 6543 */
	ldr	r1, [r1, #-1]		/* BE:r1 = x012  LE:r1 = 210x */
	strb	r2, [r0, #0x0b]
	mov	r2, r3, lsr #16		/* r2 = ..A9 */
	strh	r2, [r0, #0x09]
	mov	r3, r3, lsl #16		/* r3 = 87.. */
	orr	r3, r3, ip, lsr #16	/* r3 = 8765 */
	mov	ip, ip, lsl #16		/* ip = 43.. */
	orr	ip, ip, r1, lsr #16	/* ip = 4321 */
	mov	r1, r1, lsr #8		/* r1 = .210 */
	str	r3, [r0, #0x05]
	str	ip, [r0, #0x01]
	strb	r1, [r0]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 1110: dst is 8-bit aligned (byte 3), src is 16-bit aligned
 */
	ldrh	r2, [r1]		/* r2 = ..10 */
	ldr	r3, [r1, #0x02]		/* r3 = 5432 */
	ldr	ip, [r1, #0x06]		/* ip = 9876 */
	ldrh	r1, [r1, #0x0a]		/* r1 = ..BA */
	strb	r2, [r0]
	mov	r2, r2, lsr #8		/* r2 = ...1 */
	orr	r2, r2, r3, lsl #8	/* r2 = 4321 */
	mov	r3, r3, lsr #24		/* r3 = ...5 */
	orr	r3, r3, ip, lsl #8	/* r3 = 8765 */
	mov	ip, ip, lsr #24		/* ip = ...9 */
	orr	ip, ip, r1, lsl #8	/* ip = .BA9 */
	mov	r1, r1, lsr #8		/* r1 = ...B */
	str	r2, [r0, #0x01]
	str	r3, [r0, #0x05]
	strh	ip, [r0, #0x09]
	strb	r1, [r0, #0x0b]
	bx	lr
	LMEMCPY_C_PAD

/*
 * 1111: dst is 8-bit aligned (byte 3), src is 8-bit aligned (byte 3)
 */
	ldrb	r2, [r1]
	ldr	r3, [r1, #0x01]
	ldr	ip, [r1, #0x05]
	strb	r2, [r0]
	ldrh	r2, [r1, #0x09]
	ldrb	r1, [r1, #0x0b]
	str	r3, [r0, #0x01]
	str	ip, [r0, #0x05]
	strh	r2, [r0, #0x09]
	strb	r1, [r0, #0x0b]
	bx	lr
#endif	/* !_STANDALONE */
END(memcpy)

	.section .note.GNU-stack,"",%progbits