On Tue, Jul 07, 2015 at 11:22:08PM -0500, Scott Wood wrote: > > I agree about using labels, but "bcl 20,31,foo" is not the same thing > > as "bl foo". The former is a form of bl that doesn't perturb the link > > stack and is therefore better for performance when you're not going to > > do a matching blr later (not that performance is at all critical > > here). > > If performance mattered I would have complained about the extra mfmsr. :-) > > I see that some other parts of the kernel are using that bcl instruction, but > if it is actually worthwhile in those places, it'd be nice to at least stick > it in a macro for readability...
How is that going to help? It's just idiom; replacing it with some other idiom only means people already used to the 20,31 thing (which is quite old by now, btw.; 74xx days) will have to learn the new thing. Unless you can think of a nice short name that can even be made an extended mnemonic? Segher _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
