No, it should never change. If it changes, then it's a runtime value, and that hurts performance.
In that case, what should it be? 16 on 32-bit is a given, what about 64-bit? -Steve ----- Original Message ---- > From: Sean Kelly <[email protected]> > To: Discuss the phobos library for D <[email protected]> > Sent: Tue, June 29, 2010 12:48:39 PM > Subject: Re: [phobos] byte alignment for arrays > > I think it should be enough just to make it a documented requirement for > allocators. It's not like it will ever change, right? On Jun 28, > 2010, at 2:07 PM, Steve Schveighoffer wrote: > All, > > > Should there be something in the runtime that defines the minimum align size > for > things like memory blocks? That might make this easier to deal with from a > design perspective... > > ----- Original Message ---- >> > From: Jason Spencer < > href="mailto:[email protected]";>[email protected]> >> > >> Hmmm. The natural thing would be to have some type to > describe these >> 128-bit values (akin to __m128 in gcc, Intel and MS > compilers) and use sizeof on >> that. I don't see that D has any > MMX/SSE intrinsics, so I don't know if >> there is a standard > type. If you don't have such a thing defined by the >> compiler, > I'd be tempted to define it, based on which version of the compiler >> > will compile this code (i.e. 32- or 64-bit dmd). Then you can use that in > >> your sizeof. Maybe you'll get lucky, and that will become > standard >> :) > > > > > > _______________________________________________ > phobos mailing > list > > href="mailto:[email protected]";>[email protected] > > http://lists.puremagic.com/mailman/listinfo/phobos _______________________________________________ phobos > mailing list > href="mailto:[email protected]";>[email protected] > href="http://lists.puremagic.com/mailman/listinfo/phobos"; target=_blank > >http://lists.puremagic.com/mailman/listinfo/phobos _______________________________________________ phobos mailing list [email protected] http://lists.puremagic.com/mailman/listinfo/phobos
