Re: I_686 MMX / 3DNOW / SSE / SSE2 ?

From: Ivan Voras <ivoras_at_fer.hr>
Date: Mon, 08 May 2006 18:55:48 +0200
Alexander Leidinger wrote:

> The patches which port the revamped FPU handling from DFly don't have
> this expensive behavior for every switch. AFAIR only when the kernel
> used the FPU some context is saved. It also allows to use SIMD
> instructions in the kernel (this may be beneficial in some places).

For what it's worth - it would be interesting to see if XOR calculations 
in GRAID3 or VINUM can be speeded up by using SSE (I think SSE3 is 
needed for 128 bit integer ops?)
Received on Mon May 08 2006 - 14:56:21 UTC

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