Nios/memcpy

Write a function that copies a block of memory from the source location to the destination location. The source and destination are byte-aligned, and length can be any number of bytes.

The source and destination arrays will not overlap. The source and destination arrays do not wrap around the top of memory space (i.e., 0 <= source, and source+length <= 4GB).

void memcpy (char* destination, char* source, unsigned int length);

Expected solution length: Around 10 lines.

Sample Input

0x9999, 0, 0, 0, 0, 0xaaaa, 1, 2, 3, 4, 0xbbbb
Copy 16 bytes from offset 24 to offset 4

Sample Output

0x9999, 1, 2, 3, 4, 0xaaaa, 1, 2, 3, 4, 0xbbbb

.data
.word 0x9999
Dest: .word 0, 0, 0, 0, 0xaaaa
Src: .word 1, 2, 3, 4, 0xbbbb

.text
.global _start
_start:
    movia r4, Dest
    movia r5, Src
    movia r6, 16
    call memcpy
    1: br 1b    # Done

.global memcpy
memcpy:

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