7/29/2013
 Updated autograders to compute and summarize all autograded scores
on the gradesheets.
 Fixed some typos in the writeup and the slides.
 In the writeup, updated references to problem numbers for iaddl
and leave to include the corresponding problem numbers for the
international version.
5/1/2011
This is a major update of the Arch Lab that reflects the changes in Chapter 4 of CS:APP2e.
 Students can now use the conditional move instructions to avoid
the performance problems of conditional jumps.
 The benchmark test has a random selection of positive
vs. negative numbers. So, conditional moves are really the way to go.
 The correctness check is more robust, looking for things like overshooting the array bounds.
 Added a 1000byte limit on the size of the object code for the ncopy function.
 Added Perl scripts in src/ptest that provide comprehensive
regression testing of the different Y86 simulators:
 Tests each individual instruction type.
 Tests all of the jump types under different conditions.
 Tests different pipeline control combinations.
 Tests many different hazard possibilities.
 Incorporated the regresssion tests in src/ptest into the autograding
of the student solutions for parts B and C.
11/04/2004
 Fixed problem that caused some newer Linux distributions to
get tk.h from /usr/local/include instead of /usr/include.
Thanks to Prof. Dr. Gerd DoebenHenisch, Fachhochschule Frankfurt.
12/22/2003
 Fixed minor bug that caused some compilers to complain.
Changed type of return value from getopt() from char
to int.
Thanks to Morgan Harvey, Portland State University.
8/5/2002
