On Sunday 15 March 2009 17:03:51 Jason Martin wrote: > Hi Guys, > > Sorry for the late reply, but I've been camping for the last couple days... > > I believe that I can rewrite the core2 code to avoid the lahf/sahf > instructions without any performance lost. If there is still an > interested or need, let me know and I'll have a go at it. > > --jwm >
I've got a 2c/l penryn add/sub but it does use lahf/sahf , probably also 2c/l on core2.I have no idea if mine can written without lahf/sahf , I still getting to grips with intel microarchitecture , compared with the amd it's complicated. > > On Sun, Mar 15, 2009 at 10:07 AM, Jason Moxham > > <ja...@njkfrudils.plus.com> wrote: > > On Sunday 15 March 2009 04:55:39 Gonzalo Tornaria wrote: > >> As I mentioned, in current tr...@1739, my nocona is detected as a > >> "core2" by config.guess, since it does include lahf. > >> > >> However, I tried hacking config.guess so that my cpu returns "nocona" > >> instead --- just because I wanted to benchmark it that way (and also > >> would be a test of what happens when compiling in nocona w/o lahf). > >> But now, the configure step fails. > > > > shouldn't need to hack config.guess ,if everything working as it should > > :) then a > > ./configure --build=your_guess-unknown-linux-gnu > > should do it > > where the -unknown-linux-gnu is the last part of what config.guess > > returns > > > >> The variables are: > >> > >> using ABI="64" > >> CC="gcc -std=gnu99" > >> CFLAGS="-O2 -m64 -march=nocona -mtune=nocona" > >> CPPFLAGS="" > >> MPN_PATH=" x86_64/core2 x86_64 generic" > >> > >> (so, it seems to be using core2 code, after all...) > >> > >> The first errors that show up in configure output are: > >> > >> checking for struct pst_processor.psp_iticksperclktick... no > >> =yes: command not found: HAVE_NATIVE_%3 > >> =yes: command not found: HAVE_NATIVE_%2 > >> =yes: command not found: HAVE_NATIVE_%3 > >> =yes: command not found: HAVE_NATIVE_%2 > >> > >> And later: > >> > >> checking size of unsigned short... 0 > >> checking size of unsigned... 0 > >> checking size of unsigned long... 0 > >> checking size of mp_limb_t... 0 > >> configure: error: Oops, mp_limb_t doesn't seem to work > >> > >> Here it stops... > >> > >> Gonzalo > >> > >> On Sat, Mar 14, 2009 at 10:49 PM, Gonzalo Tornaria <torna...@gmail.com> > > > > wrote: > >> > My nocona with lahf is now a "core2-unknown-linux-gnu". Thanks for > >> > upgrading it for me... I hope it still keeps my office warm in winter > >> > > >> > :-) > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "mpir-devel" group. To post to this group, send email to mpir-devel@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 -~----------~----~----~----~------~----~------~--~---
