Computer Organisation & Architecture

PROGRAM IN MATLAB FOR DIVISION OF TWO UNSIGNED INTEGER BINARY NUMBERS
(N-BIT NUMBERS)

. To implement non-restoring division algorithm in digital computer

function lab5_coa

n=input('enter n:');

a=input('enter a:');

b=input('enter b:');

c=b;

q=a;

carry=0;

for i=1:1:n

    a(1,i)=0;

end

for i=n:-1:1

    if(c(1,i)==1)

        c(1,i)=0;

    

    else

        c(1,i)=1;

    end

end

for i=1:1:n-1

    x(1,i)=0;

end

x(1,n)=1;

for i=n:-1:1

sum=xor(xor(x(1,i),c(1,i)),carry);

carry=or(and(x(1,i),c(1,i)),and(xor(x(1,i),c(1,i)),carry));

r(1,i)=sum;

end

c=r;

    for i=1:1:n-1

        a(1,i)=a(1,i+1);

    end

    a(1,n)=q(1,1);

    for i=1:1:n-1

        q(1,i)=q(1,i+1);

    end

    carry=0;

    for i=n:-1:1

        sum=xor(xor(a(1,i),c(1,i)),carry);

        carry=or(and(a(1,i),c(1,i)),and(xor(a(1,i),c(1,i)),carry));

        a(1,i)=sum;

    end

%LOOPING CONDITION    

 for count=1:1:n-1

    if (a(1,1)==1)

          q(1,n)=0;

        for i=1:1:n-1

        a(1,i)=a(1,i+1);

        end

    a(1,n)=q(1,1);

    for i=1:1:n-1

        q(1,i)=q(1,i+1);

    end

    

       carry=0;

        for i=n:-1:1

        sum=xor(xor(a(1,i),b(1,i)),carry);

        carry=or(and(a(1,i),b(1,i)),and(xor(a(1,i),b(1,i)),carry));

        a(1,i)=sum;

        end

    else

        q(1,n)=1;

          for i=1:1:n-1

           a(1,i)=a(1,i+1);

          end

             a(1,n)=q(1,1);

            for i=1:1:n-1

             q(1,i)=q(1,i+1);

            end

             carry=0;

    for i=n:-1:1

        sum=xor(xor(a(1,i),c(1,i)),carry);

        carry=or(and(a(1,i),c(1,i)),and(xor(a(1,i),c(1,i)),carry));

        a(1,i)=sum;

    end

    end

 end

 % After completion of loop for count n-1

 if(a(1,1)==1)

       q(1,n)=0;

      carry=0;

        for i=n:-1:1

        sum=xor(xor(a(1,i),b(1,i)),carry);

        carry=or(and(a(1,i),b(1,i)),and(xor(a(1,i),b(1,i)),carry));

        a(1,i)=sum;

        end
else
 q(1,n)=1;

 end

fprintf('Remainder =');

disp(a);

fprintf('Quotient=');

disp(q);

end

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Computer Organisation & Architecture

PROGRAM IN MATLAB FOR DIVISION OF TWO UNSIGNED INTEGER BINARY NUMBERS (N-BIT NUMBERS)
. To implement restoring division algorithm in digital computer  

function div

n=input('enter n:');

a=input('enter a:');

b=input('enter b:');

c=b;

q=a;

carry=0;

for i=1:1:n

    a(1,i)=0;

end

for i=n:-1:1

    if(c(1,i)==1)

        c(1,i)=0;

    

    else

        c(1,i)=1;

    end

end

for i=1:1:n-1

    x(1,i)=0;

end

x(1,n)=1;

for i=n:-1:1

sum=xor(xor(x(1,i),c(1,i)),carry);

carry=or(and(x(1,i),c(1,i)),and(xor(x(1,i),c(1,i)),carry));

r(1,i)=sum;

end

c=r;

for count=0:1:n-1

    for i=1:1:n-1

        a(1,i)=a(1,i+1);

    end

    a(1,n)=q(1,1);

    for i=1:1:n-1

        q(1,i)=q(1,i+1);

    end

    carry=0;

    for i=n:-1:1

        sum=xor(xor(a(1,i),c(1,i)),carry);

        carry=or(and(a(1,i),c(1,i)),and(xor(a(1,i),c(1,i)),carry));

        a(1,i)=sum;

    end

    if (a(1,1)==1)

       q(1,n)=0;

       carry=0;

        for i=n:-1:1

        sum=xor(xor(a(1,i),b(1,i)),carry);

        carry=or(and(a(1,i),b(1,i)),and(xor(a(1,i),b(1,i)),carry));

        a(1,i)=sum;

        end

    else

        q(1,n)=1;

    end

end

fprintf('Remainder =');

disp(a);

fprintf('Quotient=');

disp(q);

end

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Computer Organisation & Architecture

PROGRAM IN MATLAB FOR MULTIPLICATION OF TWO UNSIGNED INTEGER BINARY NUMBERS BY PARTIAL-PRODUCT METHOD (4BITS NUMBERS)


function lab2_coa
a=input('enter a:');
b=input('enter b:');
r=[0 0 0 0 0 0 0 0];
c=0;
for j=4:-1:1
    if(b(1,j)==0)
        continue;
    end
    for i=4:-1:1
    sum=xor(xor(r(1,i+j),a(1,i)),c);
    carry=or(and(r(1,i+j),a(1,i)),and(xor(r(1,i+j),a(1,i)),c));
    c=carry;
    r(1,i+j)=sum;
 
    end
 
end

disp(r);
disp(c);

end

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Computer Organisation & Architecture

PROGRAM IN MATLAB FOR SUBTRACTION OF TWO UNSIGNED INTEGER BINARY NUMBER (4BITS NUMBERS)


function lab3_coa
a=input('enter a:');
b=input('enter b:');
c=0;
temp=a;
for i=4:-1:1
    if(b(1,i)==1)
        b(1,i)=0;
 
    else
        b(1,i)=1;
    end
end
a=[0 0 0 1];
for i=4:-1:1
sum=xor(xor(a(1,i),b(1,i)),c);
carry=or(and(a(1,i),b(1,i)),and(xor(a(1,i),b(1,i)),c));
c=carry;
result(1,i)=sum;
end
a=temp;
b=result;
c=0;
for i=4:-1:1
sum=xor(xor(a(1,i),b(1,i)),c);
carry=or(and(a(1,i),b(1,i)),and(xor(a(1,i),b(1,i)),c));
c=carry;
result(1,i)=sum;
end
if(c==0)
    fprintf('The number is negative.');
    for i=4:-1:1
    if(result(1,i)==1)
        result(1,i)=0;
 
    else
        result(1,i)=1;
    end
    end
a=[0 0 0 1];
for i=4:-1:1
sum=xor(xor(a(1,i),result(1,i)),c);
carry=or(and(a(1,i),result(1,i)),and(xor(a(1,i),result(1,i)),c));
c=carry;
result(1,i)=sum;
end
end
disp(result);
disp(c);

end

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Computer Organisation & Architecture

PROGRAM IN MATLAB FOR  ADDITION OF TWO UNSIGNED INTEGER BINARY NUMBER (4-BITS NUMBERS)

function lab0_coa

a=input('enter a:');

b=input('enter b:');

c=input('enter c:');

for i=4:-1:1

sum=xor(xor(a(1,i),b(1,i)),c);

carry=or(and(a(1,i),b(1,i)),and(xor(a(1,i),b(1,i)),c));

c=carry;

result(1,i)=sum;

end

disp(result);

disp(c);

end

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