Re: P4 vs Athlon for Linux latexing, is gcc-2.95 responsible?

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#813

From: Robert Myers
Date: Mon, 17 Jun 2002 13:56

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"David E. Konerding" <dakone@uclink.berkeley.edu> wrote in message
news:slrnagrnke.an3.dakone@master.hanalei...
>
> You can't just take the first two words of the quoted paragraph, because
> the sentence itself is factually incorrect:
>
> "Without SSE2, which requires that loops be vectorized..."
>
> SSE2 can be used as a scalar unit, or as a vector unit.  There is some
> question of whether or not it's a win when used as a scalar unit--
> although George does give a suggestion why it could be.
>
> Dave

Thank you for the correction.  Although I knew that SSE2 could be used so as
to operate on only a single packed operand, I had no idea why anyone would
want to do such a thing, except to process data in scalar mode without
switching to the 80-bit x87 format when the bulk of the calculation is in
64bit format.  The sentence correctly worded might read "Without SSE2 in
vector mode, which requires a loop construction that can be vectorized,..."

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From: "Robert Myers" <rmyers1400@attbi.com>
Newsgroups: comp.os.linux.hardware,gnu.gcc,comp.sys.ibm.pc.hardware.chips,comp.text.tex
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Subject: Re: P4  vs Athlon for Linux latexing, is gcc-2.95 responsible?
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