On Thu, Aug 18, 2011 at 4:16 AM, Richard Earnshaw <richard.earns...@arm.com> wrote: > I was just browsing libgmp this afternoon and noticed that it really > could do with an overhaul to support recent ARM chips. > > The ARM code seems to have been written for StrongARM; which is now > almost obsolete (for example, it loads from a cache line it is about to > write to in order to pre-allocate the line in the cache). > > It doesn't support v4T interworking. > > It doesn't make any use of v5 or later instructions. > > There is some Thumb(1) code, but again it has no support for > interworking, is pretty poor and limited in scope. > > I'm not sure overall how useful this is to gcc performance; the library > is needed to build GCC, but I think it's mostly there to support libmpfr. > > Nevertheless, there are other apps out there that make use of this > stuff, including some crypto code, IIRC.
I looked at using gmp as a benchmark some time ago. The assembly version is twice as fast as the C version already, which is nice. I assume NEON would be a big improvement as well. I had a quick poke through the dependencies in Ubuntu and came up with the following popular packages that use libgmp or libmpfr: * guile * python-crypto * gch (Haskel) * maxima * darcs Nothing earth shattering but probably worthwhile. I've registered: https://blueprints.launchpad.net/linaro-toolchain-misc/+spec/improve-libgmp so that we don't lose it. -- Michael _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
