Description

Objective: Learn memory organization/layout, data transfer concepts and instructions, direct memory access, memory allocation.

Requirements:
1. (5 points) Implement the following expression in assembly language:
EDX = (val3 + val4) – (val2 – val1) – (5/3)*7
– Assume that val1, val2, val3 and val4 are 16-bit integer variables
– You need to implement the expression the way it is provided, you cannot do any reduction on the expression while implementing it.
– Initialize val1 with 120 (hexadecimal), val2 with 39 (hexadecimal), val3 with 20
(hexadecimal) and val4 with 27 (hexadecimal)
– You are NOT allowed to update the values of any variables.
– Use ONLY mov, add, sub, movzx, movsx, or neg instructions whenever needed. – Use the debugger to verify your answer.

o Submit the following:
 Save your source code using your last name, Lastname1.asm and upload the
Lastname1.asm
 Screenshot (showing the code and register window) of AX register contains the correct result.
2. (5 points) Implement the following expression in assembly language:
ECX = –(val3 + val1) + (-val4 – val2) + 3
– Assume that val1 is 8-bit variable, val2 is 16-bit variable, val3 is 32-bit variable, and val4 is 8-bit variable.
– You need to implement the expression the way it is provided, you cannot do any reduction on the expression while implementing it.
– Initialize val1 with 12 (decimal), val2 with 9 (decimal), val3 with 2 (decimal), val4 with 20 (decimal),
– You are NOT allowed to update the values stored in val1, val2, val3 and val4
– Use mov, add, sub, movsx, movzx, or neg instructions whenever needed. – Use the debugger to verify your answer.
–

o Submit the following:
 Save your source code using your last name, Lastname2.asm and upload the
Lastname2.asm
 Screenshot (showing the code and register window) of ECX register contains the correct result.

3. (5 points) Write an assembly program to compute the following expressions

– Create a DWORD array named ‘z’ of size 3 using DUP operator. Leave the array ‘z’ uninitialized. You can denote the items in the array as [𝑧0, 𝑧1,𝑧2], where 𝑧0 is the first item, 𝑧1 is the second item, 𝑧2 is the third item
– Update each array item using the following expressions.

𝑧0 = 𝑥 + 130
𝑧1 = 𝑦 − 𝑥 + 𝑧0
𝑧2 = 𝑟 + 𝑥 − 𝑧1

– Where x, y, r are 16-bit integer memory variables.
– x = 10, y = 15, r = 4
– Use mov, movzx, movsx, add, sub instructions only.
– (hint: Do not alter the value of x, y and r during the computation. Transfer them to appropriate registers to do computation)
– At the end, open memory window to see the variable z stored in memory (little endian format). – Use the debugger to verify your answer.
o Submit the following:
 Rename the asm file using your last name as Lastname3.asm
 Screenshot of the code and memory window showing the content of the variable z (little endian format).

Note:
 Submit your source code by only uploading .ASM file using iCollege in the respective assignment dropbox:
 Lastname1.ASM, Lastname2.ASM, Lastname3.ASM
 Put the following information as Comment header for .ASM files:
Student: Full name
Class: CSC3210
Assignment#: 2
Description: This program ………….
 Follow the program standards as presented in your book. Pay more attention to code comments and consistent indentation.