Messages in this thread |  | | Date | Thu, 31 Aug 2000 17:27:05 +0300 | From | Petko Manolov <> | Subject | Re: [patch] string-486.h modified |
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Alan Cox wrote: > > > I made this patch as some people request using > > 486 optimized string routines for older > > (486 and 586) machines. > > I would be suprised if its a win for intel pentium cpus since almost all of them > have hardware rep movs paths (except 100Mhz B step and a few oddments)
This will be a speedup for 486 and older 586. I don't have Intel's optimization manual for 586s handy so i can't argue. But looking at linux/arch/i386/config.in shows that 486 strings (CONFIG_X86_USE_STRING_486) are preferred for 486, 586, 586 with TSC and 586 MMX.
If you're right this should be changed and we have to use these routines only for 486 and older 586 machines. Kernels optimized in this way are slightly smaller.
Anyway, i would like to hear something about the stability of the new code.
best, Petkan - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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