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Re: [2637] 2009-10-16 Colin Watson <address@hidden>

From: Robert Millan
Subject: Re: [2637] 2009-10-16 Colin Watson <address@hidden>
Date: Sun, 18 Oct 2009 17:52:46 +0200
User-agent: Mutt/1.5.18 (2008-05-17)

On Sat, Oct 17, 2009 at 11:09:28AM -0500, address@hidden wrote:
> > mmx/sse/sse2/3dnow because we don't use floating point arithmetics. If I
> > remember correctly sse has some commands for operations on parallel
> > operations on integers but the only place I see where benefit could be
> > considerable is decompression and decryption. If it's proven that
> For example, memcpy is much faster using those extended instruction
> sets.  Maybe that's not an important use case for grub2 either.

We have some code in our loaders that memcpy large chunks of data.  Not
sure how relevant this is though.

Anyhow, I bet our grub_memmove() is still suboptimal in comparison with those
on Glibc.

Robert Millan

  The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
  how) you may access your data; but nobody's threatening your freedom: we
  still allow you to remove your data and not access it at all."

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