Program 6 for Comp 150 Two Pip programs
This is a pair assignment worth 20 points.
The program
should begin with a comment including your names,
a brief description of what the program does and information on any
help you received on
the project. If it
is entirely your own
work, say so. If
anyone helped either of you,
identify them by name and describe how they helped.
Remember to turn in your work using the Blackboard
Assignment system. Have one member turn in the files for the work
and each turn in logs. It is described in the Pairs
Administration
page:
The log should
indicate your hours working on the homework and an assessment of your
contribution and an assessment of your partner's
contribution.
You are to write two separate chunks of Pip code. Call the files
p6a.asm and p6b.asm, and test each separately in
pipGUI.py. Include the initial required comments a the top of the
first file. Remember in assember, comment lines start with a
semicolon.Part A An if-else construction
Write Pip assembler code equivalent to the Python below. The easiest way and most encouraged way is using symbolic code labels as needed (followed by a colon) and symbolic data names, as understood by pipGUI.py. You may do it with numeric
data addresses and/or numeric jump addresses as in the book or the
book's applet, but in that case, do make a comment as to what memory
locations represent the x, y, and z of the Python version!
if x < 0:
y = y + 2
else:
y = x
z = y + z
You are encouraged to
- write to a file p6a.asm,
- load it into pipGUI.py,
- give values manually to x, y, and z,
- run to test the results.
- Press INIT and go back to set new x, y, z values and test some more...
Part B: Remainder by subtraction
Pip does not have a remainder operation as in Python. One way to simulate y = y % x with positive x and y is
while y >= 0:
y = y - x
y = y + x
After the loop, y < 0 for the first time. After the last line
it is back to the proper range for the remainder: 0 <= y < x.
Convert that code to Pip assembler and test as in part A.