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Re: Really compressed instruction streams

From Michael S <already5chosen@yahoo.com>
Newsgroups comp.arch
Subject Re: Really compressed instruction streams
Date 2026-09-25 11:54 +0300
Organization A noiseless patient Spider
Message-ID <20260925115414.0000148f@yahoo.com> (permalink)
References <1193vo8$30ki0$1@dont-email.me>

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On Thu, 24 Sep 2026 20:04:24 -0000 (UTC)
Thomas Koenig <tkoenig@netcologne.de> wrote:

> It seems that the different CISC and compressed instruction sets
> are ad-hoc (and not very good) attempts at compression of the
> actual instructions that machines execute.  Pure RISCS have very
> little compression, RISC-V has some, CISC has some more.  AMD's
> micro-op cache goes some way towards this when it splits
> x86_64 instructions into micro-ops.
> 

Can I ask what you find special in AMD's micro-op cache relatively to
Intel's?
To me it looks like Zen1 mostly copied 6 years earlier Sandy Bridge
tech. Following generations of Zen, while doing new things in other
parts of the core, left principles of micro-op cache mostly intact.

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Thread

Really compressed instruction streams Thomas Koenig <tkoenig@netcologne.de> - 2026-09-24 20:04 +0000
  Re: Really compressed instruction streams MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-24 22:17 +0000
    Re: Really compressed instruction streams BGB <cr88192@gmail.com> - 2026-09-24 18:00 -0500
    Re: Really compressed instruction streams scott@slp53.sl.home (Scott Lurndal) - 2026-09-25 14:39 +0000
      Re: Really compressed instruction streams cross@spitfire.i.gajendra.net (Dan Cross) - 2026-09-25 20:53 +0000
      Re: Really compressed instruction streams antispam@fricas.org (Waldek Hebisch) - 2026-10-05 23:10 +0000
        Re: Really compressed instruction streams John Levine <johnl@taugh.com> - 2026-10-06 02:46 +0000
  Re: Really compressed instruction streams quadibloc@invalid.com (John Savard) - 2026-09-24 22:37 +0000
    Re: Really compressed instruction streams MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-25 00:37 +0000
      Re: Really compressed instruction streams scott@slp53.sl.home (Scott Lurndal) - 2026-09-25 14:42 +0000
  Re: Really compressed instruction streams Robert Finch <robfi680@gmail.com> - 2026-09-24 20:56 -0400
    Re: Really compressed instruction streams Thomas Koenig <tkoenig@netcologne.de> - 2026-09-25 18:56 +0000
  Re: Really compressed instruction streams Michael S <already5chosen@yahoo.com> - 2026-09-25 11:54 +0300
    Re: Really compressed instruction streams Thomas Koenig <tkoenig@netcologne.de> - 2026-09-25 15:05 +0000
  Re: Really compressed instruction streams Michael S <already5chosen@yahoo.com> - 2026-09-25 17:39 +0300
  Re: Really compressed instruction streams Stefan Monnier <monnier@iro.umontreal.ca> - 2026-09-25 11:46 -0400
    Re: Really compressed instruction streams BGB <cr88192@gmail.com> - 2026-09-25 16:09 -0500
      Re: Really compressed instruction streams MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-25 22:59 +0000
        Re: Really compressed instruction streams BGB <cr88192@gmail.com> - 2026-09-25 18:51 -0500
          Re: Really compressed instruction streams scott@slp53.sl.home (Scott Lurndal) - 2026-09-28 15:26 +0000
            Re: Really compressed instruction streams BGB <cr88192@gmail.com> - 2026-09-28 17:42 -0500
      Re: Really compressed instruction streams BGB <cr88192@gmail.com> - 2026-09-26 03:21 -0500
    Re: Really compressed instruction streams Paul Clayton <paaronclayton@gmail.com> - 2026-09-27 21:12 -0400
      Re: Really compressed instruction streams BGB <cr88192@gmail.com> - 2026-10-01 15:42 -0500

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