Fixed alu do file and sign extend test bench
Merge branch 'master' of https://github.com/benkahle/CompArch_mp3
Merge branch 'master' of https://github.com/benkahle/CompArch_mp3
Merge branch 'master' of https://github.com/benkahle/CompArch_mp3
Merge branch 'master' of https://github.com/benkahle/CompArch_mp3
work plan