On Fri, 9 Mar 2012, Dave Martin wrote: > Register variables feel like a red herring though. We're only using > those because we can't do the needful thing and actually desscribe > these constraints in the asm constraints (which would seem to be the > right place). We specifically don't care where those values are > except at the boundaries of the asm block itself. Absolutely. > Is there a reason why ARM gcc doesn't provide the ability to specify > such exact-register constraints, or is this more for historical > reasons? It is possible? I don't know how much things have changed since I last looked at the gcc code, but implementing this seemed to be pretty trivial at the time. The problem would be to determine a good letter scheme to map to actual registers. Nicolas -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
