Re: gcc (Re: porting?)

[Konrad Kokoszkiewicz <draco@mi.com.pl>]

> Just curious, is it possible to produce PC-relative code with long
> branches on the 020->? And is it faster than absolute addressing?

Long branches are possible on 68020+, but PC-relative code with long
offsets is not possible. For example:

	move.l	addr(PC),d0

'addr' must be 16-bit, what means a distance of -32768 up to +32767
bytes.

As for speed, and for 68030, PC relative addressing seems to be of the
same speed as the absolute addressing mode (according to manuals).

--
Konrad M.Kokoszkiewicz
mail: draco@mi.com.pl
http://www.orient.uw.edu.pl/~conradus/
http://www.obta.uw.edu.pl/~draco/

** Ea natura multitudinis est,
** aut servit humiliter, aut superbe dominatur (Liv. XXIV,25)
*************************************************************
** U pospolstwa normalne jest, ze albo sluzy ono unizenie,
** albo bezczelnie sie panoszy.