Description
Purpose: Learn to use arithmetic instructions, control instructions, compare instructions, and
conditional jump instructions.
Points: 75
Assignment:
Write a simple assembly language program to find the
minimum, estimated median value, maximum, sum, and
integer average of a list of numbers. Additionally, the
program should also find the sum, count, and integer
average for the odd numbers. The program should also
find the sum, count, and integer average for the numbers
that are evenly divisible by 9. Do not change the data
types (double-words) as defined below.
Declare the values:
lst dd 4224, 1116, 1542, 1240, 1677, 1635, 2420, 1820, 1246, 1333
dd 2315, 1215, 2726, 1140, 2565, 2871, 1614, 2418, 2513, 1422
dd 1119, 1215, 1525, 1712, 1441, 3622, 1731, 1729, 1615, 2724
dd 1217, 1224, 1580, 1147, 2324, 1425, 1816, 1262, 2718, 1192
dd 1435, 1235, 2764, 1615, 1310, 1765, 1954, 1967, 1515, 1556
dd 1342, 7321, 1556, 2727, 1227, 1927, 1382, 1465, 3955, 1435
dd 1225, 2419, 2534, 1345, 2467, 1615, 1959, 1335, 2856, 2553
dd 1035, 1833, 1464, 1915, 1810, 1465, 1554, 1267, 1615, 1656
dd 2192, 1825, 1925, 2312, 1725, 2517, 1498, 1677, 1475, 2034
dd 1223, 1883, 1173, 1350, 2415, 1335, 1125, 1118, 1713, 3025
length dd 100
lstMin dd 0
estMed dd 0
lstMax dd 0
lstSum dd 0
lstAve dd 0
oddCnt dd 0
oddSum dd 0
oddAve dd 0
nineCnt dd 0
nineSum dd 0
nineAve dd 0
You may declare additional variables if needed. All data is unsigned. As such, the DIV/MUL would
be used (not IDIV/IMUL). The JA/JAE/JB/JBE must be used (as they are for unsigned data).
Since the list is not sorted, we will estimate the median value. Since the list length is even, the
estimated median will be computed by summing the first, last, and two middle values and then dividing
by 4. Be sure to divide the length by 2 (and not hard-code the indexes). There will be a 10% penalty
for hard-coding indexes.
Note, no template is provided. Create the program source file, ast04.asm, based on the previous
assignments.
Submission:
• All source files must assemble and execute on Ubuntu with yasm.
• Submit source files
◦ Submit a copy of the program source file via the on-line submission
• Once you submit, the system will score the project and provide feedback.
◦ If you do not get full score, you can (and should) correct and resubmit.
◦ You can re-submit an unlimited number of times before the due date/time (at a maximum
rate of 5 submissions per hour).
• Late submissions will be accepted for a period of 24 hours after the due date/time for any given
assignment. Late submissions will be subject to a ~2% reduction in points per an hour late. If
you submit 1 minute – 1 hour late -2%, 1-2 hours late -4%, … , 23-24 hours late -50%. This
means after 24 hours late submissions will receive an automatic 0.
Program Header Block
All source files must include your name, section number, assignment, NSHE number, and program
description. The required format is as follows:
; Name:
; NSHE ID:
; Section:
; Description:
Failure to include your name in this format will result in a loss of up to 5%.
Scoring Rubric
Scoring will include functionality, code quality, and documentation. Below is a summary of the
scoring rubric for this assignment.
Criteria Weight Summary
Assemble – Failure to assemble will result in a score
of 0.
Program Header 5% Must include header block in the
required format (see above).
General Comments 10% Must include an appropriate level of
program documentation.
Program Functionality
(and on-time)
85% Program must meet the functional
requirements as outlined in the
assignment. Must be submitted on time
for full score.
Debugger Commands:
Due to the looping, when debugging assignment #4, you should learn to set breakpoints within the
program.
Create an input file for the debugger. Some useful commands might include:
x/100dw &lst
x/uw &length
x/uw &lstMin
x/uw &estMed
x/uw &lstMax
x/uw &lstSum
x/uw &lstAve
x/uw &negCnt
x/uw &negSum
x/uw &negAve
x/uw &nineCnt
x/uw &nineSum
x/uw &nineAve
The commands should be placed in a file (such as ‘a4in.txt’) so they can be read from within the
debugger. The debugger command to read a file is ”source ”. For example, if the
command file is named ‘a4in.txt’,
(gbd) source a4in.txt
Refer to the debugger input files from the previous assignments for examples. This will include
outputting the results to a file.
