void execALU(){
switch(controle_alu.op_code){
case 1: add(); break;
case 2: addinc(); break;
case 3: and(); break;
case 4: andnota(); break;
case 5: asl(); break;
case 6: asr(); break;
case 7: deca(); break;
case 8: inca(); break;
case 9: j(); break;
case 10: jal(); break;
case 11: jf(); break;
case 12: jr(); break;
case 13: jt(); break;
case 14: lch(); break;
case 15: lcl(); break;
case 16: load(); break;
case 17: loadlit(); break;
case 18: lsl(); break;
case 19: lsr(); break;
case 20: nand(); break;
case 21: nor(); break;
case 22: ones(); break;
case 23: or(); break;
case 24: ornotb(); break;
case 25: passa(); break;
case 26: passnota(); break;
case 27: store(); break;
case 28: sub(); break;
case 29: subdec(); break;
case 30: xnor(); break;
case 31: xor(); break;
case 32: zeros(); break;
}
}
/* finds the value of every led saves it in data structure and in Array (used for drawing screen) */
void findOutput(){
int i, n1, n2, value;
output * optr;
node * nptr;
for(i = 0; i < c.li; i++) {
init(&s);
MakeStack(i);
while(!empty(&s)) {
nptr = pop(&s);
switch(nptr->type) {
case INPUT :
PutValue(nptr, value);
break;
case OUTPUT :
GetInputs(&n1, &n2, nptr->ptr);
/* Calculating Output */
optr = nptr->ptr;
switch(optr->type) {
case NAND :
value = nand(n1, n2);
break;
case XNOR :
value = xnor(n1, n2);
break;
case NOR :
value = nor(n1, n2);
break;
case AND :
value = and(n1, n2);
break;
case OR :
value = or(n1, n2);
break;
case XOR :
value = xor(n1, n2);
break;
case NOT :
value = not(n1);
break;
default :
break;
PutValue(nptr, value);
}
break;
case SWITCH :
value = GetValue(nptr->ptr);
break;
case LED :
PutValue(nptr, value);
break;
}
}
}
ChangeOnscreen();
}
//Perform the operation given by the CPU
void ALU::operation(int code, Register a, Register b)
{
//Reset all flags that aren't required
m_flags[1] = 0;
m_flags[2] = 0;
m_flags[3] = 0;
//Check if unary operation
if(!(code==0||code==1||code==4||code==9||code==13||code==16||code==17||code==18||code==19||code==20))
{
//Compare a and b if possible and set flags
if(a.getValue()>b.getValue())
{
m_flags[1] = 1;
}
else if(a.getValue()==b.getValue())
{
m_flags[2] = 1;
}
}
//Perform operation based on code (sets carry flag to 0 if it isn't set in the operation)
if(code==0)
{
zero(a);
m_flags[0] = 0;
}
else if(code==1)
{
one(a);
m_flags[0] = 0;
}
else if(code==2)
{
add(a,b);
}
else if(code==3)
{
addc(a,b);
}
else if(code==4)
{
inc(a);
}
else if(code==5)
{
sub(a,b);
}
else if(code==6)
{
subc(a,b);
}
else if(code==7)
{
rsub(a,b);
}
else if(code==8)
{
rsubc(a,b);
}
else if(code==9)
{
dec(a);
}
else if(code==10)
{
mul(a,b);
}
else if(code==11)
{
random(a);
m_flags[0] = 0;
}
else if(code==16)
{
shl(a);
}
else if(code==17)
{
shlc(a);
}
else if(code==18)
{
shr(a);
}
else if(code==19)
{
shrc(a);
}
else if(code==20)
{
not(a);
m_flags[0] = 0;
}
else if(code==21)
{
and(a,b);
m_flags[0] = 0;
}
else if(code==22)
{
nand(a,b);
m_flags[0] = 0;
}
else if(code==23)
{
or(a,b);
m_flags[0] = 0;
}
else if(code==24)
{
nor(a,b);
m_flags[0] = 0;
}
else if(code==25)
{
xor(a,b);
m_flags[0] = 0;
}
else if(code==26)
{
xnor(a,b);
m_flags[0] = 0;
}
else if(code==27)
{
bclr(a,b);
m_flags[0] = 0;
}
else if(code==31)
{
m_flags[0] = 0;
}
//Check if output is 0 and set flag accordingly
if(a.getValue())
{
m_flags[3]=1;
}
}
