# File:        hmwk01-2-soln.asm
# Written by:  Archana Chidanandan, Dec. 16, 2003
#
# Given two values "a" and "b" in memory, to obtain the product "c", without
# using MIPS mult, multu, mul, mulo or muluo instructions. The program must use
# a loop
#
	 	.text
		.globl main
main:
		la	$t0,  A		
		lw 	$t0, 0($t0)	# Read the value of “a” from memory

		la	$t1, B
		lw	$t1, 0($t1)	# Read the value of “b” from memory.

		li	$t3, 0		#  i = 0 (to keep track of the value “b”
		li	$t4, 0		#  c = 0 (initialize the result to 0)

loop:
		beq	$t3, $t1, done  # while (i is not equal to b ) continue adding
					# a to c.
		add	$t4, $t4, $t0	# c= c + a;
		addi	$t3, $t3, 1	# i = i + 1
		j loop

done:
		la	$t3, C
		sw	$t4, 0($t3)	# Store the value of “c” in memory

		li 	$v0, 10
		syscall			# Ready to quit

		.data
A:	.word	5
B:	.word	20
C:	.word	0