How to translate if .. else statement with goto?

Question

I have to translate nested-if..else conditions to goto labels in C code. I know that I have to start with outer if-s, but how to translate the inner if-s with goto?

Example: if(condition)
          {
            if(condition)
            {
             if(condition)
              {
                statements;
              }
              if(condition) return;
              statements;
            }  
          }
        else statements;

Answer 1

Actually, You do not need to translate Ìf statement or any statement that belongs to C. You could use directly like this, it will automatically translate into Assembly

int main(void)
{
    unsigned char SerData = 0x44;
    unsigned char TempSerData;
    unsigned char x;
    TempSerData = SerData;
    DDRC |= (1<<SerPin); //configure PORT C pin3 as output
    for (x=0;x<8;x++)
    {
       if (TempSerData & 0x01) // check least significant bit
             PORTC |= (1<<serPin); // set PORT C pin 3 to 1
       else
          PORTC &= ~(1<<serPin); // set PORT C pin 3 to 0
       TempSerData = TempSerData >> 1; // shift to check the next bit
    }
    return 0;
}

However, If you wanted to translate if, you could use something like this, but as I said yo do not need to convert it, or you do not need C for this job.

int x = 0, y = 1;
(x >= y) ? goto A: goto B
A: // code goes here 
    goto end
B: // code goes here  
    goto end
end: return 0;

In assembly, you can do it very easily. For example, in Àtmega128:

ldi r16, 0x00 ; load register 16 with 0
ldi r17, 0x01 ; load register 17 with 1

sub r17, r16  ; take the difference
brcs if_label
else_label:             ; do some operation on that line or on the other lines
          rjmp end
if_label:               ; do some operation on that line or on the other lines     
end: rjmp end           ; program finishes here