I am a relative newcomer in terms of PICC.

Right now I can't find a good way to test a bit in a variable such that it
is assured to compile down to using the bit test instructions.

I tried using code similar to those in the header files to reference the
individual I/O ports.  No other documentation I can find really addresses
the issue, except for the lines that address setting and clearing, but no
testing.

All I could find that is close is this but it does not seem to return the
bit's value.  Is it returning an address?  Do I need to dereference it in use?

#define PORTBIT(adr, bit)  ((unsigned)(&adr)*8+(bit))

Any help is appreciated.

Jeff

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