Re: [patch] string-486.h modified

[Jamie Lokier]

Alan Cox wrote:
> > Alan, can you send me again the list of CPUs you think
> > is worth using 486 string routines.
> > Sorry, i lost your previous mail.
> 
> I suspect it is
> 
>       486
>       K5
>       IDT Winchip
>       Rise
>       NexGen

Take a look at
   http://now.cs.berkeley.edu/Td/bcopy.html

Speed increases by 50% for unrolled string copies on their P5s.  Sure
they're old, but so are 486s :-)

Of course you do _not_ want to inline a long string copy routine.
There should probably be a arch/i386/lib/string-486.c.

-- Jamie

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