Re: 32 bit VS 64 bit modes

From	Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm>
Newsgroups	comp.lang.forth
Subject	Re: 32 bit VS 64 bit modes
Date	2016-05-28 23:42 -0400
Organization	Aioe.org NNTP Server
Message-ID	<20160528234240.5c5664a5@_> (permalink)
References	<496341e2-6ac8-4bcc-903e-c9e39e3495ae@googlegroups.com>

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On Fri, 27 May 2016 11:21:29 -0700 (PDT)
Jason Damisch <jasondamisch@yahoo.com> wrote:

> > In another thread Anton Ertl stated  

> > I have now access to an Odroid C2 running Ubuntu 16.04 in
> > 64-bit mode often called AArch64, but Gforth calls it arm64)  
> 
> I admit not being the most adroit computer programmer or user
> in the world.  So, I thought that I'd ask, if people don't mind
> too much, what the various trade-offs and advantages are between
> 32 bit and 64 bit modes.  For 16 bit VS 32 bit the advantages
> are obvious.  But, it seems to me that 32 VS 64 has diminishing
> returns.

64-bit x86 provided more registers for 64-bit mode.

They also made some changes to the way instructions address memory.

I'm not up to date on this.  Maybe a post to alt.lang.asm,
alt.os.development, comp.lang.asm.x86, or comp.arch etc will yield more
answers.

From posts to some other groups where I only lurk, I thought Anton had
done some 64-bit x86 work.

> Maybe 40 bit would be ideal?  
...

> What reasons could there
> possibly be for having more than 4 GB of RAM?

Software just keeps becoming more bloated.  E.g., on Linux 4GB is more
than enough, as long as you don't run a web browser, which will slam
your entire 4GB of memory in no time flat.

Rod Pemberton

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32 bit VS 64 bit modes Jason Damisch <jasondamisch@yahoo.com> - 2016-05-27 11:21 -0700
  Re: 32 bit VS 64 bit modes Paul Rubin <no.email@nospam.invalid> - 2016-05-27 13:06 -0700
    Re: 32 bit VS 64 bit modes Jason Damisch <jasondamisch@yahoo.com> - 2016-05-27 13:22 -0700
      Re: 32 bit VS 64 bit modes hughaguilar96@gmail.com - 2016-05-27 13:59 -0700
  Re: 32 bit VS 64 bit modes anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-05-28 10:07 +0000
    Re: 32 bit VS 64 bit modes Paul Rubin <no.email@nospam.invalid> - 2016-05-28 19:09 -0700
      Re: 32 bit VS 64 bit modes Paul Rubin <no.email@nospam.invalid> - 2016-05-28 20:00 -0700
      Re: 32 bit VS 64 bit modes Albert van der Horst <albert@cherry.spenarnc.xs4all.nl> - 2016-05-29 17:46 +0000
        Re: 32 bit VS 64 bit modes Paul Rubin <no.email@nospam.invalid> - 2016-05-29 11:27 -0700
  Re: 32 bit VS 64 bit modes Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-05-28 23:42 -0400

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