Messages in this thread | | | Date | Tue, 9 Sep 2008 19:05:28 +0300 | From | Adrian Bunk <> | Subject | Re: [git pull] x86 fixes |
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On Mon, Sep 08, 2008 at 12:30:02PM -0700, Linus Torvalds wrote: >... > - "modern 32-bit": PPro and better. Can take CMOV, MMX and TSC for > granted. > > Yes, there are graduations to the above, but reasonably, those three are I > think the "architectural" big versions. The rest should be: > > - pure "tuning" options. A Pentium 4 is different from Core 2 in tuning, > and the best code sequences can be very very different, but the binary > should work on both. > > - with *dynamic* choices for the differences that are architecturally > visible. > > Ie the whole choice of syscall/sysenter/int80 is dynamic, not specified > statically at compile time with a config option. So are things like the > different XMM versions etc. >...
We use 3DNow! for bigger memcpy's if the kernel is configured for a K7.
How does this fit into your picture?
> Linus
cu Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed
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