Some Basic Doubts !! Urgent

I have been trying to do some basic stuff as follows,

I have made a basic cpu with one in-port and one out-port

given a constant value at the inport

want to read the value in the outport by implementing the CPU using assembly prog.

.text

.global _start

_start:

movia r15, 0x00000000 /*base address of input port*/

movia r16, 0x00000010 /*base address of output port*/

ldwio r4, 0(r15)

stwio r4, 0(r16)

.end

how shud i compile this and write into the FPGA ???

I much complicated project is awaiting me... if i get through these basics i and pick up and go ahead. please help.