Re: Cost of handling misaligned access

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Sujet : Re: Cost of handling misaligned access
De : johnl (at) *nospam* taugh.com (John Levine)
Groupes : comp.arch
Date : 04. Feb 2025, 02:49:04
Autres entêtes
Organisation : Taughannock Networks
Message-ID : <vnrrmg$2adb$1@gal.iecc.com>
References : 1 2 3 4
User-Agent : trn 4.0-test77 (Sep 1, 2010)
According to MitchAlsup1 <mitchalsup@aol.com>:
That's a total of 23 pages, double it for the P0 or P1 page tables,
and it's only 46 pages.
>
That's still kind of a lot.
>
Basically, VAX taught us why we did not want to do "all that" in
a single instruction;

Yes, VAX was brilliantly optimized for hand-coded assembler on a very
memory constrained system where microcode was much faster than main
memory. Too bad that was obsolete by the time they shipped it.

while Intel 432 taught us why we did not bit
aligned decoders (and a lot of other things).

It was certainly an interesting experiment in yet another way that
Intel wanted programmers to use their computers and the programmers
said, naah.


--
Regards,
John Levine, johnl@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly

Date Sujet#  Auteur
2 Feb 25 * Re: Cost of handling misaligned access19Anton Ertl
2 Feb 25 `* Re: Cost of handling misaligned access18Thomas Koenig
2 Feb 25  +* Re: Fun with a Vax, Cost of handling misaligned access2John Levine
3 Feb 25  i`- Re: Fun with a Vax, Cost of handling misaligned access1John Levine
3 Feb 25  +* Re: Cost of handling misaligned access2BGB
3 Feb 25  i`- Re: Cost of handling misaligned access1BGB
3 Feb 25  `* Re: Cost of handling misaligned access13Terje Mathisen
3 Feb 25   `* Re: Cost of handling misaligned access12John Levine
3 Feb 25    `* Re: Cost of handling misaligned access11MitchAlsup1
4 Feb 25     +* Re: Cost of handling misaligned access4John Levine
4 Feb 25     i`* Re: Cost of handling misaligned access3John Dallman
5 Feb 25     i `* Re: Cost of handling misaligned access2Michael S
5 Feb 25     i  `- Re: Cost of handling misaligned access1John Dallman
4 Feb 25     `* Re: Cost of handling misaligned access6MitchAlsup1
4 Feb 25      +- Re: Cost of handling misaligned access1Stephen Fuld
4 Feb 25      +- Re: Cost of handling misaligned access1Thomas Koenig
4 Feb 25      `* Re: Cost of handling misaligned access3BGB
4 Feb 25       `* Re: Cost of handling misaligned access2MitchAlsup1
5 Feb 25        `- Re: Cost of handling misaligned access1BGB

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