[avr-gcc-list] efficiency of assigning bits

[Jamie Morken]

Hi,

I am trying to turn two bits off on a port as
quickly as possible, how do these two methods
compare:

PORTD = (PORTD & ~PD1) & ~PD4;

or:

cbi(PORTD, PD1); 
cbi(PORTD, PD4);

I am assuming these are equivalent.  I am learning
about bit operators so I can't be sure yet! :)

cheers,
Jamie