Lab 3

Lab Description:

In this lab we were required to create a simple 32bit calculator, much like the one made in lab 2, but using our knowledge of jumps and labels. To do this I replaced all the if, while and for loops I used previously and created corresponding labels.

Code:

 

program jmpCalc;
#include("stdlib.hhf")
static
x:int32;
y:int32;
z:int32;

choice:int32;

begin jmpCalc;

menu:
stdout.put("Enter 1 to add: ",nl);

stdout.put("Enter 2 to subtract: ",nl);

stdout.put("Enter 3 to multiply: ",nl);

stdout.put("Enter 0 to exit: ",nl);

stdin.get(choice);

mov(choice,edx);

cmp(edx,1);
je addlbl;
cmp(edx,2);
je sublbl;
cmp(edx,3);
je mulbl;
cmp(edx,0);
je endlbl;

toolrg:
      stdout.put(nl,"this number is too large." , nl);

addlbl:
		mov(0,z);
		stdout.put("Enter number 1: ");
		stdin.get(x);
		cmp(x,65536);
		jg toolrg;
		stdout.put(nl);
		stdout.put("Enter number 2: ");
		stdin.get(y);
		cmp(y,65536);
		jg toolrg;
		stdout.put(nl);
		mov(x,eax);
		mov(y,ebx);
		add(ebx,eax);
		mov(eax,z);
		cmp(z,65536);
		jg toolrg;
		stdout.put("The answer is: ",z,nl);
		stdout.put(nl);
		jmp menu;

sublbl:
		mov(0,z);
		stdout.put("Enter number 1: ");
		stdin.get(x);
		cmp(x,65536);
		jg toolrg;
		stdout.put(nl);
		stdout.put("Enter number 2: ");
		stdin.get(y);
		cmp(y,65536);
		jg toolrg;
		stdout.put(nl);
		mov(x,eax);
		mov(y,ebx);
		sub(ebx,eax);
		mov(eax,z);
		cmp(z,65536);
		jg toolrg;
		stdout.put("The answer is: ",z,nl);
		stdout.put(nl);
		jmp menu;

mulbl:
		mov(0,z);
		stdout.put("Enter number 1: ");
		stdin.get(x);
		cmp(x,65536);
		jg toolrg;
		stdout.put(nl);
		stdout.put("Enter number 2: ");
		stdin.get(y);
		cmp(y,65536);
		jg toolrg;
		stdout.put(nl);
		mov(x,eax);
		mov(y,ebx);
		cmp(ebx, 0);
		je zero;
		cmp(eax, 0);
		je zero;
		jg mulfor;	
mulend:		
		stdout.put("The answer is: ",z,nl);
		cmp(z,65536);
		jg toolrg;
		stdout.put(nl);
		jmp menu;
mulfor:		
		cmp(ebx,0);
		jle mulend;
		add(eax,z);
		sub(1,ebx);
		jmp mulfor;
zero:
  stdout.put("The answer is 0.", nl);
   jmp endlbl;
endlbl:
stdout.put("Program End", nl);
end jmpCalc;

Screenshots: