Hello, 2011/11/23 Matthias Klose <d...@debian.org>: > On 11/19/2011 11:42 PM, Ben Hutchings wrote:
>> (Later it should be increased >> further, and eventually i386 should be reduced to a partial architecture >> that may be installed on amd64 systems.) This would allow the use of >> optimisations and new instructions throughout userland that improve >> performance for the vast majority of users. > could you give numbers what kind of improvements you would expect? The > biggest > burden for i386 is the register pressure, which you won't fix with targeting a > newer processor. The better approach would be a new port, the x32 > architecture; > I don't know if anybody did look into building a distribution for this > architecture yet. The next thing could be to default to sse2 math instead of > x87 (didn't look if this is already the default for x32). FWIW, Yocto has attempted to build an image for x32: <https://wiki.yoctoproject.org/wiki/X32_abi> Yes, x32 defaults to SSE and improvements expected 7-10% on integer math over ia32 (5-8% over intel64) and 5-11% on fp math over ia32. Figures from <http://linuxplumbersconf.org/2011/ocw/system/presentations/531/original/x32-LPC-2011-0906.pptx> Cheers, -- Héctor Orón -.. . -... .. .- -. -.. . ...- . .-.. --- .--. . .-. -- To UNSUBSCRIBE, email to debian-gcc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/caodfwegyeux2ybij1i5orxfs2fme5mrw-eoesv2l_s2y2jh...@mail.gmail.com