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List of ENCM 369 Winter 2008 Tutorial Problems

This page is maintained by Steve Norman
Last modified: Mon Apr 14 16:47:14 MDT 2008

Note: I will try to post the handouts every week, but most weeks I will not be posting solutions.

• Mon, Jan 21 (PDF format)
• Mon, Jan 28 (PDF format)
• Mon, Feb 4 (PDF format). Note that in a few places add was used where addi should have been used. For example, add $a0, $s0, -2 should have been addi $a0, $s0, -2. Sorry for the confusion -- I did test the code with SPIM, but the SPIM assembler automatically turns add into addi when necessary.
• Answers for part (3) of the Feb. 4 tutorial.
• Mon, Feb 11 (PDF format).
  Correction: In the 2pm tutorial I missed two essential instructions in the procedure prologue! Here is a corrected prologue:

        .text
        .globl ff
  ff:   # prologue
        addi    $sp, $sp, -28    # allocate 7 words
        sw      $a2, 24($sp)     # copy zz to stack
        sw      $ra, 20($sp)
        sw      $s3, 16($sp)
        sw      $s2, 12($sp)
        sw      $s1, 8($sp)
        sw      $s0, 4($sp)
        add     $s0, $zero, $a0  # copy xx to $s0 (forgot this in 2pm class!)
        add     $s1, $zero, $a1  # copy yy to $s1 (forgot this in 2pm class!)
        

  Sorry for the confusion, and thanks to the student who asked me about this at 2:55pm!
• Mon, Feb 25 (PDF format). Includes a minor correction to Exercise 1a.
• Mon, Mar 3 (PDF format).
• Mon, Mar 10 (PDF format).
  Here are a couple of corrections:
  • The base two value of the exponent bias in the 64-bit IEEE 754 format is 011_1111_1111. (The handout incorrectly says 0111_1111_1111.)
  • This is what I should have said about the 64-bit FPRs:

    A return value of type double goes in $f0.
    $f2 ... $f10 are like t-registers.
    $f12 ... $f18 are like a-registers.
    $f20 ... $30 are like s-registers.
          

    (The handout is wrong about $f20.)
• Mon, Mar 17 (PDF format).
• Mon, Mar 24 (PDF format).
  Note, posted March 24 at 5:30pm: Only Problem 1 was covered in the tutorial periods.
  Update, March 26 at 6:15pm: Problem 1 Solution and Solutions for Problems 2, 3, 4.
• Mon, Mar 31 (PDF format).
• Mon, Apr 7 (PDF format).
• Mon, Apr 14 (PDF format).