-- part2a.asm
	lw   $15,w1($0)
	lw   $16,w2($0)
	nop		 -- must wait to do add
	add  $17,$15,$16 -- $16 forwarded 
	add  $18,$17,$17 -- $17 forwarded on both
	nop              -- must wait to do beq
	beq  $17,$18,lab1 -- $18 forwarded, no br
	lw   $1,w1($0)
	j    lab1
	lw   $2,w1($0)   -- branch slot, always
	lw   $2,w6($0)   -- not executed
	nop
lab1:	sw   $1,w2($0)
	sw   $2,w4($0)
	beq  $2,$1,lab2 -- no forward, does branch 
	lw   $8,w2($0)  -- always execute
	lw   $8,w6($0)  -- not executed
	nop
lab2:	lw   $5,w5($0)
	beq  $2,$16,lab4 -- no forward, no branch
	lw   $6,w6($0) 
	addi $7,w1($0)
lab4:	sw   $6,0($7)
	nop
	nop
	nop
	nop
	nop
w1:	word 0x11111111
w2:	word 0x22222222
w3:	word 0x33333333
w4:	word 0x44444444
w5:	word 0x55555555
w6:	word 0x66666666
	end