Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
In this Lab you will code 8086 assembler equivalents (Virgo) for common C control flow instructions. This will give you an appreciation for how control flow is implemented in assembly (and machine) language. You will find that it is not quite as simple as it is with a high-level language. See special instructions for submission at the end of this file.This lab contains a BONUS section worth an additional 4 points on your final mark! Here is a list of the C instructions for which you will code assembly language equivalents:
If statementC codeif (condition) {statements}If-Else statementC codeif (condition) {then_statements} else {else_statements}While loopC codewhile (condition) {statements}Do-While loopC codedo {statements} while (condition);For loopC codefor (initialization; condition; increment) {statements}Switch statementC codeswitch (expression) {case val_1:case_1_statementscase val_2:case_2_statementscase val_n:case_n_statementsdefault:default_statements}Normally, C Switch statements have a Break statement at the end of each case. You will also need to implement Break and Continue statements which can be used inside some of these control flow instructions.Break statementsA Break statement can occur inside a C loop or Switch statement. It is implemented as an unconditional branch to a label immediately following the loop or Switch statement.Continue statementsA Continue statement can occur inside a C loop. For While and Do-While loops, it is implemented as an unconditional branch to a label for the condition test of the While or Do-While statement.A Continue statement in a For loop is implemented as an unconditional branch to a label immediately preceding the code to implement the increment statement.
Note that the assembly code you develop for these C-structure equivalents need only be shown as pseudocode; that is, since the actual conditions are not given, neither the test for the condition nor the jump statement for this test can actually be shown. Typically, the test will be some sort of compare (cmp) instruction and the jump will be one of the many jmp variants. It is only necessary to state that a test must be done at a certain point and that a jump relating to that test should then be done at some other point. In the second and third parts of the assignment, you will code and test two of these instructions using actual assembly language.
Coding for the IF statement is given below as an example of the syntax required. Use a similar syntax for the remaining control flow instructions.
If statementC codeif (condition) {statements}Assembler pseudo-codeIF:test conditionjump to Next if falseassembly code for statementsNext:Part A) Write pseudo-code for the remaining five control flow statements given above and for the Break and Continue statements.Part B) Code a Do-While loop for the following C-code example in Virgo assembly language (assumeint's are words of 2 bytes). Place each C-code statement at the appropriate place in your assembly code as a comment:int x = 0;do{x++;if (x == 5) continue;sum += x;} while (x < 10);Bonus) Code a Switch statement for the following C-code example in assembly language (assume int's are words of 2 bytes). Place each C-code statement at the appropriate place in your assembly code as a comment:
int a;int b = 0x12;int c = 0x34;int p = some constant value;switch (p){case 0: a = b + c; break;case 1: a = b - c; break;case 3: a = b; break;case 7: a = c; break;default: a = 0;}
Variable Declaration This declaration of variables in the C language is permitted only in the starting of their block, prior to executable program statements. In C++ declaratio
How to write C program (interest calculator) the simple interest on a loan is calculated by the formula interest=principal*rate*days/365; ?
What are the different types of endless loops? An endless loop can be of two types: i.) A loop that is intentionally designed to go round and round until the condition withi
Program to print character array : Write a program to print the character array by using string class functions. void main() { char line[30]; int i=0; clrsc
History?
Scope Rules and Storage Classes The storage class verifies the life of a variable in terms of its duration or its scope. There are four storage classes : automatic static
I''m trying to write a function that prints the substring if it is found in the string, and after it prints it deletes it from the string so i could print the next substring if it
assume that the first integer read with cin specifies the number of values remaining to be entered. that program should read only one value each time cin is executed .a typical inp
Within C we access external devices by means of a pointer i.e. address. The address could point to any memory mapped device i.e. Ram, Rom, Duart, Disk drives etc. Therefore there i
Reference Oddities A reference variable can demote to any integer variable, be it in an array or a member variable from structure or class. Reference variables can demote to co
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd