/*      $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