Lab 2

Objective: The objective of this lab was to observe the characteristics of computer calculations through creating an HLA based calculator. By doing so, it was possible to observe how data is stored and produced through registers. Primitive functions such as ‘pow’ and ‘mul’, were prohibited when programming in order to gain further insight on how computers translate high level commands to simple machine language. Furthermore, the functions of the ‘for’ loop was observed.

Code: The source code for the calculator can be seen below. This calculator also incorporates the use of a Arabic to Roman numeral converter that was previously programmed in Lab 1. This function was implemented into the program by using it as a procedure, similarly to a function in C++ programming. Unfortunately, the exponential features of the calculator still contains errors.

//CET 3510 Shinquella Glasgow Lab# 2
/*This is a calculator that has exponent, multiplication, 
addition,subtraction, and arabic to roman numeral converter feature*/

program calculator;

#include ("stdlib.hhf");

//Assign variables

static
  	a: int32;
  	x: int32;
  	y: int32;
  	z: int32;
  	j: int32;
  	i: int32;
//Procecure for roman numeral converter
	procedure roman_numerals;

begin roman_numerals;
repeat

 stdout.put ("Arabic to Roman numeral converter. Enter a number from 1 to. Press 0 to exit and use calculator", nl);

  //get user input from keyboard
  stdin.get(a);

  //Move a user input to register
	mov(a,eax); 
	mov(a,ebx);

  //Roman numeral Conversion Loop

 while(eax>0) do
		    if(eax>=100) then
			    stdout.put("C");
   			 sub(100,eax);

elseif (eax>=99)then
    		stdout.put("IC");
		    sub(99,eax);

	elseif (eax>=90)then
    		stdout.put("XC");
		    sub(90,eax);

	elseif(eax>=50)then
    		stdout.put("L");
    		sub(50,eax);

elseif(eax>=49)then
    		stdout.put("IL");
    		sub(49,eax);

elseif(eax>=40)then
		    stdout.put("XL");
    		sub(40,eax);	

	elseif(eax>=10)then
    		stdout.put("X");
    		sub(10,eax);

	elseif(eax>=9)then
    		stdout.put("IX");
    		sub(9,eax);

	elseif(eax>=5)then
    		stdout.put("V");
    		sub(5,eax);

	elseif(eax>=4)then
		    stdout.put("IV");
    		sub(4,eax);

	elseif(eax>=1)then
    		stdout.put("I");
    		sub(1,eax);

endif;
endwhile;
stdout.put(nl);
until(ebx==0);

end roman_numerals;

//begin program

begin calculator;
	call roman_numerals;

repeat

//||||||||||||||||||||||||||||||Addition|||||||||||||||||||||||||||||||||||||||||||||

stdout.put("Addition")
stdout.put(nl);
stdout.put("Enter a value for x:");

	stdin.geti32();
	      mov(eax, x);

stdout.put("Enter a value for y:");

	stdin.geti32();
      	mov(eax, y);

//Add numbers

	mov(x,eax);
mov(y,ebx);
	add(eax, ebx);
	mov(ebx, z);
	stdout.put(z, nl);

//|||||||||||||||||||||||||||||||||||||Subtraction||||||||||||||||||||||||||||||||||||

stdout.put("Subtraction")
stdout.put(nl);

stdout.put("Enter a value for x:");

	stdin.geti32(); 
      	mov(eax, x);

stdout.put("Enter a value for y:");

	stdin.geti32();
	      mov(eax, y);

// Subtract numbers

	mov(x,eax);
	mov(y,ebx);
	sub(ebx,eax);
	mov(eax,z);
	stdout.puti32(z);
	stdout.put(nl);

//|||||||||||||||||||||||||||||Multiplication|||||||||||||||||||||||||||||||||||||||

stdout.put("Multiplication")
stdout.put(nl);
stdout.put("Enter a value for x:");

	stdin.geti32();
	      mov(eax, x);

stdout.put("Enter a value for y:");

	stdin.geti32();
      	mov(eax, y);

// Multipy numbers

	mov(0,eax);
	mov(y,ebx);

	for (mov(0,ecx);ecx<ebx; inc(ecx)) do
    		add(x,eax);
	endfor;

	stdout.puti32(eax);
	stdout.put(nl);

//|||||||||||||||||||||||||||||Exponent|||||||||||||||||||||||||||||||||||||||

stdout.put("Exponent")
stdout.put(nl);
stdout.put("Enter a value for x:");

	stdin.geti32();
      	mov(eax, x);

stdout.put("Enter a value for y:");

	stdin.geti32();
      	mov(eax, y);

// Exponent numbers

	mov(x,eax);
	mov(y,ebx);
	mov(1,eax);
	for (mov(0,ecx);ecx<ebx; inc(ecx)) do
     		mov(0,ecx);
   for (mov(0,ecx);ecx<ebx; inc(ecx)) do
    		add(ebx,y);
    		mov(ebx,z);
   endfor;
	endfor;

	stdout.puti32(z);
	stdout.put(nl);

	stdout.put(nl);
	until(ebx==0);
	end calculator;

Screen Shot: The image below is what the program outputs once executed in the terminal.