Submit: lab1.mal, README

Files:

• lab1.c
• lab1.mal
• lab1Xtra.c
• lab1Xtra.mal

Before you begin: You will need to set up your environment.

1. Open an SSH session to learn or teach:
   Start -> Internet Tools -> _Unix - Telnet & SSH -> _learn, _teach, etc. This will allow you to use cut & paste.
   • Cut & paste lab1.mal into your SSH window. Save it.
   • This command you will only need to execute once -- the first time you ever use xspimsal! Type the following line exactly as it appears:
     source /afs/cats.ucsc.edu/courses/cmpe12c-rph/newbin/make12cpath
2. Start Exceed:
   Start -> X-Windows -> Xterm on hawking. Log in as you normally would.
   • In the x-term window: Type xspimsal -file lab1.mal. This will start xspimsal with the file you just saved.

Problem: Posted is a very short C program, lab1.c. If you were to compile a C program with the command gcc -S lab1.c, you would get an output that is a .s file, or assembly language. Posted is a cleaned up version of lab1.s called lab1.mal, which will run on the MAL simulator, and which is commented so you can see what is going on.

Your job is to take lab1.mal and make it more efficient by changing the MAL instructions within the specified block of code. You may delete, add, change, or move the instructions to make the code run more efficiently (ie fewer total instructions executed). You DO NOT need to change any branch instructions! Do not worry about suboptimal branching.

No collaboration with other students is allowed on this lab assignment!

Evaluation: your lab tutor will assign one of following grades: check +, check, check -, 0

• For a 0, do nothing.
• For a X-, you will need to submit a MAL program which is a more efficient version of lab1.mal.
• For a X, you will need to submit a maximally efficient version of lab1.mal. This means that I or your lab tutor will not be able to make your program more efficient.
• For a X+, you will need to submit a program worthy of a check, plus an efficient version of lab1Xtra.mal (more complex).

Be sure that you're enrolled in the laboratory that you are attending; the lab tutors will have a list of those who are in their lab session.

Graders: Here is a grading template and a completed example.