Logarithm in PBP

[savnik]

I use this code to read the forwardpower

    ADCIN 0, adval	                ' Read channel 0 to adval
    dummy = adval * 5 * 10          ' Multiply to load internal registers with 32-bit value
    value = Div32 1023              ' Divide 32-bit value by word and store in word    
    forwardpower = (value*value)/50

and this for reflected power

    ADCIN 1, adval1	                ' Read channel 0 to adval
    dummy1 = adval1 * 5 * 10        ' Multiply to load internal registers with 32-bit value
    value1 = Div32 1023             ' Divide 32-bit value by word and store in word    
    reflectedpower = (value1*value1)/50

and the type for SWR is:

..........1 + square root(reflectedpower/forwardpower)
SWR = --------------------------------------------
..........1 - square root(reflectedpower/forwardpower)

Any help how to show the SWR on LCD;