Arend wrote: > On Mon, 11 Apr 2005, Dave Denholm wrote: > > Paul Pogonyshev <[EMAIL PROTECTED]> writes: > > > I'm thinking of starting wrapping GNU Go board and related global > > > variables into a structure so that we can have several boards in > > > parallel. I remember being hostile to this idea a few years ago, > > > but maybe we will have to make GNU Go threaded eventually. Are > > > there any strong positive or negative opinions on this issue? > > > > A potential benefit is that (the c compiler can generate code such that) > > one register keeps a pointer to that structure. Then accesses to the > > various globals can be accessed more efficiently. > > Are you sure?? What is the advantage of relative addressing in the form > (%some register + constant) as compared to (constant)?
I remember someone posting here that some architectures can't use constant addressing, so for them there will be no difference. But I cannot see any imporvement here either. Besides, we will need to pass the pointer around all the time. Anyway, the goal is not to gain speed improvements; I actually think it will make GNU Go a little bit slower. The goal is to make it possible to run with multiple threads. Paul _______________________________________________ gnugo-devel mailing list [email protected] http://lists.gnu.org/mailman/listinfo/gnugo-devel
