Frederick is working on mpz_mulhi, however one thing we *really* need (since the interesting case for his applications is for a small number of limbs) is an x86_64 assembly version for the basecase, as at present I think we just use a full multiplication. I think this should save a large percentage of the time (nearly half I think).
Jason, do you by any chance have any code for this? Bill. On 5 July 2010 13:12, Bill Hart <goodwillh...@googlemail.com> wrote: > On 5 July 2010 12:54, Fredrik Johansson <fredrik.johans...@gmail.com> wrote: >> Since Bill asked... >> >> * "short" integer multiplication > > Do you mean mpz_mullo and mpz_mulhi? That would be an interesting > project. Of course we already have this at the mpn level, but much > more work could be done on this to make it better. > >> * fmpz style mpzs (an alternative project would be to switch Sage >> Integers over to fmpz without modifying MPIR... is FLINT2 ready for >> such a thing?) > > The flint2 fmpz interface could be used straight away. The problem is > there is a namespace conflict with fmpz's in flint1 (which are not the > same thing). > > They could be renamed temporarily (say to gmpz's) and we'll rename > back later when flint2 goes. > > Otherwise, this is one of the most developed interfaces in flint2 and > should be ok to use. > >> >> Maybe I'll think of some other things later... >> >> Fredrik > -- You received this message because you are subscribed to the Google Groups "mpir-devel" group. To post to this group, send email to mpir-de...@googlegroups.com. To unsubscribe from this group, send email to mpir-devel+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/mpir-devel?hl=en.
