# File:        p3.asm
# Written by:  Larry Merkle, Dec. 4, 2002
# Modified by:  J.P. Mellor, 3 Sep. 2004
#
# This file contains a MIPS assembly language program that uses only the
# instructions introduced in p1.asm and p2.asm plus the following:
#
#   la rdest, address	- Loads a computed address -- not the contents of
#			  the location -- into register rdest.  This
#			  pseduoinstruction actually translates into lui
#			  and ori, which were explained in p2.asm.
#   lw rt, address	- Load the 32-bit quantity (word) at address
#			  into register rt.
#   sw rt, address	- Store the word from register rt at address.
#
# It implements the high-level language statement A[12] = h + A[8]; .
#
# It is intended to help CS232 students familiarize themselves with MIPS
# and SPIM.

	.globl main		# Make main, A, and h globl so you can
	.globl A		# refer to them by name in SPIM.
	.globl h


	.data			# Data section of the program

A:	.word	0, 1, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43
h:	.word	40

	.text			# Text section of the program
	
main:				# Program starts at main.
        la	$t0, h		# Register $t0 gets address of h
	la	$t1, A		# Register $t1 gets address of A

	lw	$t2, 0($t0)	# Register $t2 gets h

	lw	$t3, 32($t1)	# Register $t3 gets A[8]

	add	$t3, $t2, $t3	# Register $t3 gets h + A[8]

	sw	$t3, 48($t1)	# A[12] gets h + A[8]

	li	$v0, 10		# Prepare to exit
	syscall			#   ... Exit.