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Path: ...!feeder1.cambriumusenet.nl!feed.tweak.nl!217.73.144.44.MISMATCH!feeder.ecngs.de!ecngs!feeder2.ecngs.de!feeds.phibee-telecom.net!2.eu.feeder.erje.net!feeder.erje.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: John Savard <quadibloc@servername.invalid> Newsgroups: comp.arch Subject: Re: "Mini" tags to reduce the number of op codes Date: Wed, 17 Apr 2024 15:06:05 -0600 Organization: A noiseless patient Spider Lines: 17 Message-ID: <9ce02jd7i3uhbqv5iq9djiagblu47vkcs2@4ax.com> References: <uuk100$inj$1@dont-email.me> <6mqu0j1jf5uabmm6r2cb2tqn6ng90mruvd@4ax.com> <15d1f26c4545f1dbae450b28e96e79bd@www.novabbs.org> <lf441jt9i2lv7olvnm9t7bml2ib19eh552@4ax.com> <9280b28665576d098af53a9416604e36@www.novabbs.org> <e8q71jljlep537vm7tbue7ch37o9q66l8k@4ax.com> <uv19ai$3kitp$1@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Injection-Date: Wed, 17 Apr 2024 23:06:06 +0200 (CEST) Injection-Info: dont-email.me; posting-host="2945c5dc9f0f6a427cf330164902ac6e"; logging-data="1909015"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+c1+t5zc+oo1Q/fp4gk7ukD/FoTlK1V+0=" Cancel-Lock: sha1:UID0XDd9/92GtT8kt3Dzb8bk5qY= X-Newsreader: Forte Free Agent 3.3/32.846 Bytes: 2022 On Mon, 8 Apr 2024 17:25:38 -0000 (UTC), Thomas Koenig <tkoenig@netcologne.de> wrote: >John Savard <quadibloc@servername.invalid> schrieb: > >> Well, when the computer fetches a 256-bit block of code, the first >> four bits indicates whether it is composed of 36-bit instructions or >> 28-bit instructions. > >Do you think that instructions which require a certain size (almost) >always happen to be situated together so they fit in a block? Well, floating-point and integer instructions of one size each can be arbitrarily mixed. And when different sizes need to mix, going to 36-bit instructions is low overhead. John Savard