Skip to main content

Parallel For

Definition​

If you use For outside of a Thread, the VHDL For is used. In that section you can repeat only a finite amount of times. If you want to use this parallel For in a thread, you have to write ParFor.

The for loop can count up (TO) or down (DOWNTO) between constant values. With exit; you can leave the loop before it is finished. The name of the counter (i) can be used as variable.

Examples​

Process() {
    For (i IN 7 DOWNTO 1) 
    { 
        LED(i) <= LED(i-1); 
        If(i = exitValue) 
        { 
            exit; 
        } 
    }
}

OR

Process() {
    Thread {
        ParFor (i IN 7 DOWNTO 1) 
        { 
            LED(i) <= LED(i-1); 
            If(i = exitValue) 
            { 
                exit; 
            } 
        }
    }
}