/*=============================================================================
Function multm
Purpose: multiplies two numbers mod m
Parameters:
ul a (IN) - first operand
ul b (IN) - second operand
ul m (IN) - modulus
Returns: a * b mod m
=============================================================================*/
ul multm(ul a, ul b, ul m) {
ul mask = 0x80000000;
ul i;
ul t=0;
for (i=0;i<32;i++) {
t = mult2m(t,m);
if (b&mask) t=addm(t,a,m);
mask>>=1;
}
return t;
}
int instruction_cycle(CPU *cpu) {
int halted = 1;
(*cpu).ir = (*cpu).mem[(*cpu).pc];
handleInstruction(cpu);
switch ((*cpu).opcode){
case 0:
halted = 0;
printf("Halt!");
break;
case 1:
ld(cpu);
break;
case 2:
st(cpu);
break;
case 3:
add(cpu);
break;
case 4:
neg(cpu);
break;
case 5:
ldm(cpu);
break;
case 6:
addm(cpu);
break;
case 7:
br(cpu);
break;
case 8:
brp(cpu);
break;
case 9:
io(cpu);
break;
default:
printf("Error:Invalid opcode at address %d,Invalid number: %d",(*cpu).pc,(*cpu).mem[(*cpu).pc]);
break;
}
(*cpu).pc++;
return halted;
// For Lab 7, we just print a message and halt after the 10th call
//
//char suffix[][4] = {"", "st","nd","rd","th"};
//printf("Calling instruction_cycle for %d%s time\n", call_nbr, suffix[min(call_nbr,4)]);
}
void main()
{
clrscr();
int m,n,p,q,a[20][20],b[20][20],c[20][20];
cout<<"Enter no:of rows & columns of first matrix:";
cin>>m>>n;
cout<<"Enter no:of rows & columns of second matrix:";
cin>>p>>q;
if(m!=p||n!=q)
cout<<"Matrix addition and substraction not possible.\n";
else
{
cout<<"Enter elements of First matrix:\n";
getm(m,n,a);
cout<<"Enter elements of Second matrix:\n";
getm(p,q,b);
clrscr();
cout<<"First matrix:\n";
prim(m,n,a);
cout<<"Second matrix:\n";
prim(p,q,b);
cout<<"Matrix Sum:\n";
addm(m,n,a,b);
cout<<"Matrix Difference:\n";
subm(m,n,a,b);
}
if(m!=q)
cout<<"Matrix multiplication not possible.";
else
{
if(m!=p||n!=q)
{
cout<<"Enter elements of First matrix:\n";
getm(m,n,a);
cout<<"Enter elements of Second matrix:\n";
getm(p,q,b);
clrscr();
cout<<"First matrix:\n";
prim(m,n,a);
cout<<"Second matrix:\n";
prim(p,q,b);
}
cout<<"Matrix Product:\n";
mulm(m,n,q,a,b,c);
}
getch();
}
