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Re: Setting architectural features in stone

From nmm@wheeler.UUCP (Nick Maclaren)
Newsgroups comp.arch
Subject Re: Setting architectural features in stone
Date 2016-08-03 09:40 +0000
Organization Old Fogies Society
Message-ID <nnse5k$m20$1@dont-email.me> (permalink)
References <nnb615$1h2k$1@gioia.aioe.org> <nnn452$548$1@dont-email.me> <nnrcnr$267$1@gioia.aioe.org> <66682c36-81e9-481a-a4d2-1f61e9754ada@googlegroups.com>

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In article <66682c36-81e9-481a-a4d2-1f61e9754ada@googlegroups.com>,
Quadibloc  <jsavard@ecn.ab.ca> wrote:
>On Tuesday, August 2, 2016 at 6:09:36 PM UTC-6, Walter Banks wrote:
>
>> C often is used as a reason to support charters and power of two data 
>> sizes but there is no language limit that restricts its use for other 
>> data formats.
>
>I'm not aware of a language limit myself.

The restriction was introduced in C99, against opposition.  6.2.6
in C99.

>In the FORTRAN standard, it is specified that DOUBLE PRECISION values are to 
>occupy two "storage cells" while REAL ones occupy one.
>
>This would not make sense on many computers with a 24-bit word length. On such 
>a computer, one possibility is that single precision will be 48 bits long, and 
>double precision will be 72 bits, or three words, long.

Nuts.  Sorry, but ....  Such machines were common, and they almost
all had 48 bit floats and 96 bit double precision.  The latter was
implemented in various ways, not all with 96-bit accuracy.


Regards,
Nick Maclaren.

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Thread

Re: Setting architectural features in stone Noob <root@127.0.0.1> - 2016-08-01 11:18 +0200
  Re: Setting architectural features in stone Ivan Godard <ivan@millcomputing.com> - 2016-08-01 09:26 -0700
  Re: Setting architectural features in stone anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-08-01 15:48 +0000
  Re: Setting architectural features in stone Quadibloc <jsavard@ecn.ab.ca> - 2016-08-01 10:13 -0700
  Re: Setting architectural features in stone Walter Banks <walter@bytecraft.com> - 2016-08-02 20:09 -0400
    Re: Setting architectural features in stone Quadibloc <jsavard@ecn.ab.ca> - 2016-08-02 18:39 -0700
      Re: Setting architectural features in stone Quadibloc <jsavard@ecn.ab.ca> - 2016-08-03 00:52 -0700
        Re: Setting architectural features in stone Walter Banks <walter@bytecraft.com> - 2016-08-03 06:45 -0400
      Re: Setting architectural features in stone David Brown <david.brown@hesbynett.no> - 2016-08-03 15:02 +0200
    Re: Setting architectural features in stone Quadibloc <jsavard@ecn.ab.ca> - 2016-08-02 19:37 -0700
      Re: Setting architectural features in stone Noob <root@127.0.0.1> - 2016-08-03 10:52 +0200
        Re: Setting architectural features in stone Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-08-03 11:09 +0100
        Re: Setting architectural features in stone Keith Thompson <kst-u@mib.org> - 2016-08-03 08:51 -0700
        Re: Setting architectural features in stone Quadibloc <jsavard@ecn.ab.ca> - 2016-08-03 09:36 -0700
          Re: Setting architectural features in stone George Neuner <gneuner2@comcast.net> - 2016-08-03 20:30 -0400
          Re: Setting architectural features in stone Noob <root@127.0.0.1> - 2016-08-04 13:06 +0200
            Re: Setting architectural features in stone Bruce Hoult <bruce.hoult@gmail.com> - 2016-08-04 06:39 -0700
              Re: Setting architectural features in stone nmm@wheeler.UUCP (Nick Maclaren) - 2016-08-04 17:40 +0000
      Re: Setting architectural features in stone nmm@wheeler.UUCP (Nick Maclaren) - 2016-08-03 09:40 +0000
        Re: Setting architectural features in stone Quadibloc <jsavard@ecn.ab.ca> - 2016-08-03 09:50 -0700
          Re: Setting architectural features in stone Quadibloc <jsavard@ecn.ab.ca> - 2016-08-03 10:14 -0700
            Re: Setting architectural features in stone Quadibloc <jsavard@ecn.ab.ca> - 2016-08-04 06:11 -0700
              Re: Setting architectural features in stone Quadibloc <jsavard@ecn.ab.ca> - 2016-08-04 06:14 -0700
      Re: Setting architectural features in stone Walter Banks <walter@bytecraft.com> - 2016-08-03 07:03 -0400
        Re: Setting architectural features in stone already5chosen@yahoo.com - 2016-08-03 04:12 -0700
          Re: Setting architectural features in stone already5chosen@yahoo.com - 2016-08-03 04:26 -0700
            Re: Setting architectural features in stone Walter Banks <walter@bytecraft.com> - 2016-08-03 07:50 -0400
          Re: Setting architectural features in stone Walter Banks <walter@bytecraft.com> - 2016-08-03 07:35 -0400
    Re: Setting architectural features in stone anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-08-03 06:42 +0000
      Re: Setting architectural features in stone Quadibloc <jsavard@ecn.ab.ca> - 2016-08-03 00:03 -0700
        Re: Setting architectural features in stone anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-08-03 08:30 +0000
      Re: Setting architectural features in stone Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-08-03 11:02 +0100
        Re: Setting architectural features in stone Ivan Godard <ivan@millcomputing.com> - 2016-08-03 03:15 -0700
        Re: Setting architectural features in stone anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-08-03 11:53 +0000
          Re: Setting architectural features in stone Quadibloc <jsavard@ecn.ab.ca> - 2016-08-03 18:03 -0700
            Re: Setting architectural features in stone Bruce Hoult <bruce.hoult@gmail.com> - 2016-08-04 01:54 -0700
            Re: Setting architectural features in stone anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-08-04 09:28 +0000
      Re: Setting architectural features in stone timcaffrey@aol.com - 2016-08-04 09:48 -0700
        Re: Setting architectural features in stone Stephen Fuld <SFuld@alumni.cmu.edu.invalid> - 2016-08-04 10:04 -0700

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