Re: Examples of current platforms/architectures where sizeof(void) > sizeof(int) ?

From	David Brown <david.brown@hesbynett.no>
Newsgroups	comp.lang.c
Subject	Re: Examples of current platforms/architectures where sizeof(void) > sizeof(int) ?
Date	2021-09-04 13:12 +0200
Organization	A noiseless patient Spider
Message-ID	<sgvkb1$pqa$1@dont-email.me> (permalink)
References	(11 earlier) <sgsao1$ie0$1@dont-email.me> <b269912f-21e1-4c16-9bb1-efcd6954453en@googlegroups.com> <sgtdf2$g6v$1@dont-email.me> <90a43fde-5b57-48a6-ac61-c11b16f1425an@googlegroups.com> <871r65ttr3.fsf@bsb.me.uk>

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On 03/09/2021 20:10, Ben Bacarisse wrote:

> 
> I used (as was tangentially involved in the implementation of) C on a
> machine that had 16 bit words and only word addressing.  The choice made
> there was to use the bottom bit to select between the two halves of the
> word addressed by the pointer (shifted right by 1).
> 

There are a number of microcontrollers that have a similar principle for
bit-sized accesses (with hardware support, rather than
compiler-generated code for using the bit pointers).  This is typically
restricted to a particular section of on-chip ram (or peripheral
registers) that is mapped in two address areas - one as bytes (or
bigger), and one as bits using byte addresses.  It can be very handy for
giving fast, atomic bit-wise access.

Thread

Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Lynn McGuire <lynnmcguire5@gmail.com> - 2021-08-30 21:59 -0500
  Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Andrey Tarasevich <andreytarasevich@hotmail.com> - 2021-08-30 21:53 -0700
    Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Andrey Tarasevich <andreytarasevich@hotmail.com> - 2021-08-30 21:59 -0700
  Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bo Persson <bo@bo-persson.se> - 2021-08-31 09:01 +0200
    Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Lynn McGuire <lynnmcguire5@gmail.com> - 2021-08-31 23:46 -0500
      Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? David Brown <david.brown@hesbynett.no> - 2021-09-01 08:19 +0200
      Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? scott@slp53.sl.home (Scott Lurndal) - 2021-09-01 15:32 +0000
        Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-01 19:20 +0200
          Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? David Brown <david.brown@hesbynett.no> - 2021-09-01 19:44 +0200
            Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Lynn McGuire <lynnmcguire5@gmail.com> - 2021-09-01 13:17 -0500
              Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? David Brown <david.brown@hesbynett.no> - 2021-09-01 20:32 +0200
              Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? scott@slp53.sl.home (Scott Lurndal) - 2021-09-01 19:00 +0000
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Lynn McGuire <lynnmcguire5@gmail.com> - 2021-09-01 15:06 -0500
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? scott@slp53.sl.home (Scott Lurndal) - 2021-09-01 20:14 +0000
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Michael S <already5chosen@yahoo.com> - 2021-09-01 14:04 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? scott@slp53.sl.home (Scott Lurndal) - 2021-09-01 23:44 +0000
            Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-01 20:37 +0200
              Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2021-09-01 12:43 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-02 05:37 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2021-09-02 11:28 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-03 07:10 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2021-09-03 06:59 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-03 17:02 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Manfred <noname@add.invalid> - 2021-09-03 19:33 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-03 19:47 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? scott@slp53.sl.home (Scott Lurndal) - 2021-09-03 17:54 +0000
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bart <bc@freeuk.com> - 2021-09-03 20:54 +0100
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? scott@slp53.sl.home (Scott Lurndal) - 2021-09-03 20:52 +0000
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2021-09-04 12:36 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2021-09-03 10:49 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-09-03 19:10 +0100
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-09-03 14:20 -0400
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-09-03 19:45 +0100
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-09-03 16:35 -0400
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? David Brown <david.brown@hesbynett.no> - 2021-09-04 13:12 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-04 09:11 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2021-09-04 11:27 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-05 04:25 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2021-09-06 16:10 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-08 19:44 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2021-09-08 11:45 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-09 19:09 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2021-09-09 10:51 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-10 10:31 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2021-09-10 10:41 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-14 04:14 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2021-09-14 07:45 -0700
            Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bart <bc@freeuk.com> - 2021-09-01 20:34 +0100
              Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2021-09-01 13:02 -0700
              Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? scott@slp53.sl.home (Scott Lurndal) - 2021-09-01 20:18 +0000
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Michael S <already5chosen@yahoo.com> - 2021-09-01 14:07 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bart <bc@freeuk.com> - 2021-09-01 22:18 +0100
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Andrey Tarasevich <andreytarasevich@hotmail.com> - 2021-09-01 18:23 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? David Brown <david.brown@hesbynett.no> - 2021-09-02 13:35 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2021-09-02 05:24 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2021-09-02 14:56 -0600
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Vir Campestris <vir.campestris@invalid.invalid> - 2021-09-07 21:12 +0100
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-09-07 22:19 -0400
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Vir Campestris <vir.campestris@invalid.invalid> - 2021-09-12 21:23 +0100
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Michael S <already5chosen@yahoo.com> - 2021-09-09 08:36 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Lynn McGuire <lynnmcguire5@gmail.com> - 2021-09-01 17:46 -0500
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-09-01 16:53 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Lynn McGuire <lynnmcguire5@gmail.com> - 2021-09-02 17:11 -0500
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2021-09-01 16:59 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-09-01 17:01 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bart <bc@freeuk.com> - 2021-09-02 01:29 +0100
              Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? David Brown <david.brown@hesbynett.no> - 2021-09-02 13:29 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bart <bc@freeuk.com> - 2021-09-02 14:19 +0100
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-09-02 17:10 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Michael S <already5chosen@yahoo.com> - 2021-09-02 07:28 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? David Brown <david.brown@hesbynett.no> - 2021-09-02 21:07 +0200
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Michael S <already5chosen@yahoo.com> - 2021-09-02 13:05 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-09-02 17:18 -0700
                Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Bart <bc@freeuk.com> - 2021-09-03 01:25 +0100
  Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Mark Bluemel <mark.bluemel@gmail.com> - 2021-09-01 03:30 -0700
    Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Mark Bluemel <mark.bluemel@gmail.com> - 2021-09-01 03:36 -0700
    Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Lynn McGuire <lynnmcguire5@gmail.com> - 2021-09-01 12:49 -0500
      Re: Examples of current platforms/architectures where sizeof(void*) > sizeof(int*) ? Mark Bluemel <mark.bluemel@gmail.com> - 2021-09-01 14:30 -0700

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