On Tue, 22 Jul 2003, Wayne Gowcher wrote: > I am trying to get some DRM ( direct rendering module > ? ) code to work with XFree86 on a mips system and > have come across the function cmpxchg(). On x86 > systems 486 and higher this is an assembly > instruction. Other architectures like sparc have some > inline assembly to preform the same task. Yet other > architectures like the parisc have generic c code to > implement the function. MIPS it seems has nothing. > > Has anyone ever implemented this for mips2 and higher > architecture ? > > If no, does anyone think it is possible to use ll / sc > to implement this function similar to the spinlock > case. Or should I just stick with the generic c > versions ? Doing it with ll/sc should be straightforward. -- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available +
