Re: Calling conventions (particularly 32-bit ARM)

From	John Levine <johnl@taugh.com>
Newsgroups	comp.arch
Subject	Re: Calling conventions (particularly 32-bit ARM)
Date	2025-01-15 22:03 +0000
Organization	Taughannock Networks
Message-ID	<vm9bca$1ns0$1@gal.iecc.com> (permalink)
References	<vlgngv$1ks4a$1@dont-email.me> <c7d39917db81f33fd90a8b57e7d0f85d@www.novabbs.org> <vm7a73$qm2$1@gal.iecc.com> <4c878826966f3f8d5f3241250b544473@www.novabbs.org>

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According to MitchAlsup1 <mitchalsup@aol.com>:
>On Wed, 15 Jan 2025 3:31:47 +0000, John Levine wrote:
>
>> According to MitchAlsup1 <mitchalsup@aol.com>:
>>>Pass by COMMON block was even faster.
>>
>> Sometimes.  On machines that don't have direct addressing, such as
>> S/360,
>> the code needs to load a pointer to the data either way so it's a wash.
>>
>> Even when you do have direct addressing, if code is compiled to be
>> position indepedent, the common block wouldn't be in the same module
>> as the code that references it so it still needs to load a pointer
>> from the GOT or whatever its equivalent is.
>
>Pass by COMMON block allows one to pass hundreds of data values in a
>single call.
>
>You are treating the common block as if it had but one data container.

If I were that kind of programmer, I could use EQUIVALENCE to glue a bunch of
local variables and arrays together and pass that as a subroutine argument. Also
remember that on machines without direct addressing there's extra code if the
size of a block of whatever size is more than the offset size in an instruction,
12 bits on S/360 and usually 16 on z.

It's really a matter of taste and programming style more than efficiency.

R's,
John

-- 
Regards,
John Levine, johnl@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly

Thread

Calling conventions (particularly 32-bit ARM) David Brown <david.brown@hesbynett.no> - 2025-01-06 14:57 +0100
  Re: Calling conventions (particularly 32-bit ARM) Theo <theom+news@chiark.greenend.org.uk> - 2025-01-06 15:23 +0000
    Re: Calling conventions (particularly 32-bit ARM) David Brown <david.brown@hesbynett.no> - 2025-01-07 09:22 +0100
  Re: Calling conventions (particularly 32-bit ARM) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2025-01-06 15:32 +0000
    Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-06 20:19 +0000
      Re: Calling conventions (particularly 32-bit ARM) David Brown <david.brown@hesbynett.no> - 2025-01-07 10:09 +0100
        Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-07 23:23 +0000
          Re: Calling conventions (particularly 32-bit ARM) scott@slp53.sl.home (Scott Lurndal) - 2025-01-07 23:35 +0000
            Re: Calling conventions (particularly 32-bit ARM) "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-01-07 15:42 -0800
              Re: Calling conventions (particularly 32-bit ARM) "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-01-07 20:01 -0800
            Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-08 01:38 +0000
    Re: Calling conventions (particularly 32-bit ARM) David Brown <david.brown@hesbynett.no> - 2025-01-07 09:49 +0100
  Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-06 20:10 +0000
    Re: Calling conventions (particularly 32-bit ARM) antispam@fricas.org (Waldek Hebisch) - 2025-01-07 02:11 +0000
      Re: Calling conventions (particularly 32-bit ARM) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-01-07 06:53 +0000
      Re: Calling conventions (particularly 32-bit ARM) Stephen Fuld <sfuld@alumni.cmu.edu.invalid> - 2025-01-12 12:10 -0800
        Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-12 20:41 +0000
        Re: Calling conventions (particularly 32-bit ARM) antispam@fricas.org (Waldek Hebisch) - 2025-01-13 01:20 +0000
          Re: Calling conventions (particularly 32-bit ARM) Stephen Fuld <sfuld@alumni.cmu.edu.invalid> - 2025-01-14 09:40 -0800
            Re: Calling conventions (particularly 32-bit ARM) Terje Mathisen <terje.mathisen@tmsw.no> - 2025-01-14 19:18 +0100
              Re: Calling conventions (particularly 32-bit ARM) Michael S <already5chosen@yahoo.com> - 2025-01-14 23:48 +0200
                Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-14 23:27 +0000
                Re: Calling conventions (particularly 32-bit ARM) John Levine <johnl@taugh.com> - 2025-01-15 03:31 +0000
                Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-15 16:50 +0000
                Re: Calling conventions (particularly 32-bit ARM) John Levine <johnl@taugh.com> - 2025-01-15 22:03 +0000
                Re: Calling conventions (particularly 32-bit ARM) antispam@fricas.org (Waldek Hebisch) - 2025-01-16 03:02 +0000
                Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-16 15:08 +0000
                Re: Calling conventions (particularly 32-bit ARM) antispam@fricas.org (Waldek Hebisch) - 2025-01-16 16:24 +0000
        Re: Calling conventions (particularly 32-bit ARM) Thomas Koenig <tkoenig@netcologne.de> - 2025-01-13 21:33 +0000
          Re: Calling conventions (particularly 32-bit ARM) Thomas Koenig <tkoenig@netcologne.de> - 2025-01-14 06:48 +0000
            Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-14 18:03 +0000
    Re: Calling conventions (particularly 32-bit ARM) George Neuner <gneuner2@comcast.net> - 2025-01-07 16:52 -0500
      Re: Calling conventions (particularly 32-bit ARM) Stefan Monnier <monnier@iro.umontreal.ca> - 2025-01-08 12:20 -0500
        Re: Calling conventions (particularly 32-bit ARM) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2025-01-09 08:38 +0000
          Re: Calling conventions (particularly 32-bit ARM) Stefan Monnier <monnier@iro.umontreal.ca> - 2025-01-13 10:55 -0500
      Re: Calling conventions (particularly 32-bit ARM) Tim Rentsch <tr.17687@z991.linuxsc.com> - 2025-01-27 17:09 -0800
        Re: Calling conventions (particularly 32-bit ARM) George Neuner <gneuner2@comcast.net> - 2025-01-28 22:53 -0500
          Re: Calling conventions (particularly 32-bit ARM) Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-02-14 20:40 -0800
            Re: Calling conventions (particularly 32-bit ARM) George Neuner <gneuner2@comcast.net> - 2026-02-17 15:35 -0500
              Re: Calling conventions (particularly 32-bit ARM) Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-03-14 09:34 -0700
                Re: Calling conventions (particularly 32-bit ARM) George Neuner <gneuner2@comcast.net> - 2026-03-24 17:20 -0400
    Re: Calling conventions (particularly 32-bit ARM) Stefan Monnier <monnier@iro.umontreal.ca> - 2025-01-08 12:34 -0500
      Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-08 20:19 +0000
      Re: Calling conventions (particularly 32-bit ARM) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2025-01-08 22:08 +0000
        Re: Calling conventions (particularly 32-bit ARM) Stefan Monnier <monnier@iro.umontreal.ca> - 2025-01-08 18:20 -0500
          Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-09 00:11 +0000
          Re: Calling conventions (particularly 32-bit ARM) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2025-01-09 07:23 +0000
            Re: Calling conventions (particularly 32-bit ARM) Thomas Koenig <tkoenig@netcologne.de> - 2025-01-09 10:07 +0000
              Re: Calling conventions (particularly 32-bit ARM) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2025-01-10 08:24 +0000
            Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-09 20:48 +0000
              Re: Calling conventions (particularly 32-bit ARM) Thomas Koenig <tkoenig@netcologne.de> - 2025-01-09 21:23 +0000
                Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-10 01:08 +0000
                Re: Calling conventions (particularly 32-bit ARM) Thomas Koenig <tkoenig@netcologne.de> - 2025-01-10 09:19 +0000
            Re: Calling conventions (particularly 32-bit ARM) antispam@fricas.org (Waldek Hebisch) - 2025-01-10 08:33 +0000
              Re: Calling conventions (particularly 32-bit ARM) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2025-01-10 10:25 +0000
                Re: Calling conventions (particularly 32-bit ARM) John Levine <johnl@taugh.com> - 2025-01-10 15:17 +0000
                Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-13 02:10 +0000
                Re: Calling conventions (particularly 32-bit ARM) scott@slp53.sl.home (Scott Lurndal) - 2025-01-13 14:19 +0000
                Re: Calling conventions (particularly 32-bit ARM) Thomas Koenig <tkoenig@netcologne.de> - 2025-01-13 18:02 +0000
                Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-13 19:00 +0000
                Re: Calling conventions (particularly 32-bit ARM) scott@slp53.sl.home (Scott Lurndal) - 2025-01-13 21:53 +0000
                Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-13 22:02 +0000
                Re: Calling conventions (particularly 32-bit ARM) scott@slp53.sl.home (Scott Lurndal) - 2025-01-13 22:40 +0000
                Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-14 02:32 +0000
                Re: Calling conventions (particularly 32-bit ARM) David Brown <david.brown@hesbynett.no> - 2025-01-14 15:08 +0100
                Re: Calling conventions (particularly 32-bit ARM) scott@slp53.sl.home (Scott Lurndal) - 2025-01-14 14:22 +0000
                Re: Calling conventions (particularly 32-bit ARM) Michael S <already5chosen@yahoo.com> - 2025-01-14 16:41 +0200
                Re: Calling conventions (particularly 32-bit ARM) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2025-01-14 18:02 +0000
                Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-14 18:15 +0000
                Re: Calling conventions (particularly 32-bit ARM) Thomas Koenig <tkoenig@netcologne.de> - 2025-01-14 18:19 +0000
                Re: Calling conventions (particularly 32-bit ARM) Terje Mathisen <terje.mathisen@tmsw.no> - 2025-01-14 19:39 +0100
                Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-14 19:14 +0000
                Re: Calling conventions (particularly 32-bit ARM) Thomas Koenig <tkoenig@netcologne.de> - 2025-01-14 20:01 +0000
                Re: Calling conventions (particularly 32-bit ARM) scott@slp53.sl.home (Scott Lurndal) - 2025-01-14 22:05 +0000
                Re: Calling conventions (particularly 32-bit ARM) Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-01-14 15:23 -0800
                Re: Calling conventions (particularly 32-bit ARM) scott@slp53.sl.home (Scott Lurndal) - 2025-01-14 23:39 +0000
                Re: Calling conventions (particularly 32-bit ARM) Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-01-14 16:59 -0800
                Re: Calling conventions (particularly 32-bit ARM) scott@slp53.sl.home (Scott Lurndal) - 2025-01-14 23:40 +0000
                Re: Calling conventions (particularly 32-bit ARM) Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-01-14 17:11 -0800
                Re: Calling conventions (particularly 32-bit ARM) Michael S <already5chosen@yahoo.com> - 2025-01-15 00:09 +0200
                Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-14 19:08 +0000
                Re: Calling conventions (particularly 32-bit ARM) scott@slp53.sl.home (Scott Lurndal) - 2025-01-14 19:24 +0000
                Re: Calling conventions (particularly 32-bit ARM) Thomas Koenig <tkoenig@netcologne.de> - 2025-01-14 20:31 +0000
                Re: Calling conventions (particularly 32-bit ARM) Michael S <already5chosen@yahoo.com> - 2025-01-14 23:13 +0200
                Re: Calling conventions (particularly 32-bit ARM) mitchalsup@aol.com (MitchAlsup1) - 2025-01-15 00:47 +0000
                Re: Calling conventions (particularly 32-bit ARM) Thomas Koenig <tkoenig@netcologne.de> - 2025-01-14 06:20 +0000
                Re: Calling conventions (particularly 32-bit ARM) David Brown <david.brown@hesbynett.no> - 2025-01-14 15:05 +0100
                Re: Calling conventions (particularly 32-bit ARM) scott@slp53.sl.home (Scott Lurndal) - 2025-01-14 14:39 +0000
                Re: Calling conventions (particularly 32-bit ARM) David Brown <david.brown@hesbynett.no> - 2025-01-14 16:50 +0100
                Re: Calling conventions (particularly 32-bit ARM) Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-01-14 15:32 -0800
                Re: Calling conventions (particularly 32-bit ARM) Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-01-14 00:14 -0800
              Re: Calling conventions (particularly 32-bit ARM) scott@slp53.sl.home (Scott Lurndal) - 2025-01-10 14:43 +0000
            Re: Calling conventions (particularly 32-bit ARM) David Brown <david.brown@hesbynett.no> - 2025-01-10 18:39 +0100
              Re: Calling conventions (particularly 32-bit ARM) scott@slp53.sl.home (Scott Lurndal) - 2025-01-10 18:39 +0000
                Re: Calling conventions (particularly 32-bit ARM) David Brown <david.brown@hesbynett.no> - 2025-01-12 14:55 +0100
              Re: Calling conventions (particularly 32-bit ARM) Thomas Koenig <tkoenig@netcologne.de> - 2025-01-10 19:19 +0000
                Re: Calling conventions (particularly 32-bit ARM) David Brown <david.brown@hesbynett.no> - 2025-01-12 14:59 +0100

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