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#include "setarch.h"

#include "defines.h"

        ; dst A0

        ; src A1

        ; len A2

        .global ___reg_memcpy

___reg_memcpy:

        MOVP    A0P,A3P ; keep copy of result

        ADDP    A2P,A0P ; point to end of dst

        ADDP    A2P,A1P ; point to end of src

        CMPP    A0P,A3P ; see if anything to do

        beq     quit

loop:

#ifdef __NORMAL_MODE__

        sub     #1,A1P          ; point to byte

#else

        subs    #1,A1P          ; point to byte

#endif

        mov.b   @A1P,A2L        ; get byte

        mov.b   A2L,@-A0P       ; save byte

        CMPP    A0P,A3P         ; at the front again ?

        bne     loop

        ; return with A0 pointing to dst

quit:   rts