tested add addi sub
Merge remote-tracking branch 'origin/master'

Conflicts:
	_xmsgs/pn_parser.xmsgs
	fuse.log
	fuse.xmsgs
	fuseRelaunch.cmd
	iseconfig/TOP.xreport
	isim/work/adder.vdb
	isim/work/alu.vdb
	isim/work/alucontrolgenerator.vdb
	isim/work/controlunit.vdb
	isim/work/instrdecoder.vdb
	isim/work/mips.vdb
	isim/work/pc.vdb
	isim/work/progtest.vdb
	isim/work/regfile.vdb
	isim/work/shifter.vdb
	isim/work/signextender.vdb
	isim/work/sllshifter.vdb
	isim/work/srashifter.vdb
	isim/work/srlshifter.vdb
	isim/work/top.vdb
	lab3.gise