Re: MISC - Stack Based vs. Register Based

From	glen herrmannsfeldt <gah@ugcs.caltech.edu>
Newsgroups	comp.lang.forth, comp.arch.fpga
Subject	Re: MISC - Stack Based vs. Register Based
Date	2013-04-02 17:20 +0000
Organization	Aioe.org NNTP Server
Message-ID	<kjf41c$c0i$1@speranza.aioe.org> (permalink)
References	<kj4vae$msi$1@dont-email.me> <kj51u8$7l1$1@speranza.aioe.org> <kj7nd5$54l$1@dont-email.me> <kj9vkg$mtp$1@speranza.aioe.org> <kjenr0$1mp$1@dont-email.me>

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In comp.arch.fpga rickman <gnuarm@gmail.com> wrote:
> On 3/31/2013 2:34 PM, glen herrmannsfeldt wrote:
>> In comp.arch.fpga rickman<gnuarm@gmail.com>  wrote:
 
> (snip)

>> I have an actual RX2600 dual Itanium box, but don't run it very
>> often, mostly because of the power used.
 
> A 100 watt lightbulb uses about $10 a month if left on 24/7.  So I 
> wouldn't worry too much about the cost of running your Itanium.  If you 
> turn it off when you aren't using it I can't imagine it would really 
> cost anything noticeable to run.

It is a dual processor box, plus all the rest of the systems
in the box. Yes, I was considering running it all the time, but
it is too expensive for that.
 
>> For Itanium, the different units do different things. There are
>> instruction formats that divide up the bits in different ways to make
>> optimal use of the bits. I used to have the manual nearby, but I don't
>> see it right now.
 
> Yes, the array processor I worked on was coded from scratch, very 
> laboriously.  The Itanium is trying to run existing code as fast as 
> possible.  So they have a number of units to do similar things, but also 
> different types, all working in parallel as much as possible.  Also the 
> parallelism in the array processor was all controlled by the programmer. 
>  In regular x86 processors the parallelism is controlled by the chip 
> itself.  I'm amazed sometimes at just how much they can get the chip to 
> do, no wonder there are 100's of millions of transistors on the thing. 
> I assume parallelism in the Itanium is back to the compiler smarts to 
> control since it needs to be coded into the VLIW instructions.

Seems to me that the big problem with the original Itanium was the
need to also run x86 code. That delayed the release for some time, and
in that time other processors had advanced. I believe that later
versions run x86 code in software emulation, maybe with some hardware
assist. 

-- glen

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MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-03-29 17:00 -0400
  Re: MISC - Stack Based vs. Register Based glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-03-29 21:43 +0000
    Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-03-29 20:28 -0400
      Re: MISC - Stack Based vs. Register Based glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-03-31 18:34 +0000
        Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-02 09:54 -0400
          Re: MISC - Stack Based vs. Register Based glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-04-02 17:20 +0000
            Re: MISC - Stack Based vs. Register Based David Brown <david@westcontrol.removethisbit.com> - 2013-04-03 09:12 +0200
    Re: MISC - Stack Based vs. Register Based Jon Elson <jmelson@wustl.edu> - 2013-04-01 15:11 -0500
  Re: MISC - Stack Based vs. Register Based AKE <assadebrahim2000@gmail.com> - 2013-03-29 18:19 -0700
    Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-03-30 18:50 -0400
      Re: MISC - Stack Based vs. Register Based Jecel <jecel@merlintec.com> - 2013-04-01 13:18 -0700
        Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-02 10:50 -0400
          Re: MISC - Stack Based vs. Register Based Jecel <jecel@merlintec.com> - 2013-04-02 23:39 -0700
            Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-03 09:54 -0400
              Re: MISC - Stack Based vs. Register Based Jecel <jecel@merlintec.com> - 2013-04-05 14:30 -0700
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-05 17:53 -0400
                Re: MISC - Stack Based vs. Register Based Jecel <jecel@merlintec.com> - 2013-04-06 13:27 -0700
                Re: MISC - Stack Based vs. Register Based Jecel <jecel@merlintec.com> - 2013-04-06 13:37 -0700
        Re: MISC - Stack Based vs. Register Based Paul Rubin <no.email@nospam.invalid> - 2013-04-07 15:21 -0700
          Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-08 01:24 -0400
            Re: MISC - Stack Based vs. Register Based Syd Rumpo <usenet@nononono.co.uk> - 2013-04-08 10:18 +0100
          Re: MISC - Stack Based vs. Register Based Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-08 04:18 -0500
  Re: MISC - Stack Based vs. Register Based Arlet Ottens <usenet+5@c-scape.nl> - 2013-03-30 08:20 +0100
    Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-03-30 19:00 -0400
      Re: MISC - Stack Based vs. Register Based Arlet Ottens <usenet+5@c-scape.nl> - 2013-03-31 13:20 +0200
  Re: MISC - Stack Based vs. Register Based "Rod Pemberton" <do_not_have@notemailnotq.cpm> - 2013-03-30 17:54 -0400
    Re: MISC - Stack Based vs. Register Based Arlet Ottens <usenet+5@c-scape.nl> - 2013-03-31 09:11 +0200
      Re: MISC - Stack Based vs. Register Based "Rod Pemberton" <do_not_have@notemailnotq.cpm> - 2013-04-01 20:10 -0400
        Re: MISC - Stack Based vs. Register Based glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-04-02 00:54 +0000
          Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-02 13:31 -0400
            Re: MISC - Stack Based vs. Register Based glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-04-02 19:03 +0000
        Re: MISC - Stack Based vs. Register Based Arlet Ottens <usenet+5@c-scape.nl> - 2013-04-02 08:25 +0200
          Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-02 13:33 -0400
        Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-02 13:26 -0400
          Re: MISC - Stack Based vs. Register Based "Rod Pemberton" <do_not_have@notemailnotq.cpm> - 2013-04-03 20:34 -0400
            Re: MISC - Stack Based vs. Register Based glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-04-04 02:07 +0000
              Re: MISC - Stack Based vs. Register Based albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-04-04 11:16 +0000
                Re: MISC - Stack Based vs. Register Based Arlet Ottens <usenet+5@c-scape.nl> - 2013-04-04 13:25 +0200
                Re: MISC - Stack Based vs. Register Based glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-04-04 12:44 +0000
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-04 17:04 -0400
                Re: MISC - Stack Based vs. Register Based glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-04-04 21:34 +0000
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-04 19:30 -0400
                Re: MISC - Stack Based vs. Register Based Mark Wills <markrobertwills@yahoo.co.uk> - 2013-04-05 00:41 -0700
                Re: MISC - Stack Based vs. Register Based Alex McDonald <blog@rivadpm.com> - 2013-04-04 15:30 -0700
                Re: MISC - Stack Based vs. Register Based glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-04-04 23:15 +0000
                Re: MISC - Stack Based vs. Register Based Alex McDonald <blog@rivadpm.com> - 2013-04-04 17:26 -0700
                Re: MISC - Stack Based vs. Register Based albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-04-05 01:17 +0000
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-05 18:00 -0400
                Re: MISC - Stack Based vs. Register Based "Rod Pemberton" <do_not_have@notemailnotq.cpm> - 2013-04-08 23:55 -0400
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-04 20:07 -0400
                Re: MISC - Stack Based vs. Register Based Mark Wills <markrobertwills@yahoo.co.uk> - 2013-04-05 00:51 -0700
                Re: MISC - Stack Based vs. Register Based Arlet Ottens <usenet+5@c-scape.nl> - 2013-04-05 14:31 +0200
                Re: MISC - Stack Based vs. Register Based Mark Wills <markrobertwills@yahoo.co.uk> - 2013-04-05 07:33 -0700
                Re: MISC - Stack Based vs. Register Based Arlet Ottens <usenet+5@c-scape.nl> - 2013-04-05 17:01 +0200
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-05 18:25 -0400
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-06 17:44 -0400
                Re: MISC - Stack Based vs. Register Based Brad Eckert <hwfwguy@gmail.com> - 2013-04-05 10:14 -0700
                Re: MISC - Stack Based vs. Register Based Arlet Ottens <usenet+5@c-scape.nl> - 2013-04-05 20:13 +0200
                Re: MISC - Stack Based vs. Register Based Arlet Ottens <usenet+5@c-scape.nl> - 2013-04-05 20:15 +0200
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-05 18:54 -0400
                Re: MISC - Stack Based vs. Register Based Brad Eckert <hwfwguy@gmail.com> - 2013-04-08 09:57 -0700
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-09 10:13 -0400
                Re: MISC - Stack Based vs. Register Based Brad Eckert <hwfwguy@gmail.com> - 2013-04-09 08:55 -0700
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-09 14:40 -0400
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-05 18:49 -0400
                Re: MISC - Stack Based vs. Register Based daveyrotten <danw8804@gmail.com> - 2013-04-09 13:02 -0700
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-09 16:07 -0400
                Re: MISC - Stack Based vs. Register Based daveyrotten <danw8804@gmail.com> - 2013-04-09 13:26 -0700
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-10 00:33 -0400
                Re: MISC - Stack Based vs. Register Based daveyrotten <danw8804@gmail.com> - 2013-04-10 07:08 -0700
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-10 10:13 -0400
                Re: MISC - Stack Based vs. Register Based Sieur de Bienville <morrimichael@gmail.com> - 2013-04-10 21:08 -0700
                Re: MISC - Stack Based vs. Register Based Paul Rubin <no.email@nospam.invalid> - 2013-04-10 22:47 -0700
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-11 16:32 -0400
                Re: MISC - Stack Based vs. Register Based "Rod Pemberton" <do_not_have@notemailnotq.cpm> - 2013-04-18 06:23 -0400
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-18 17:06 -0400
                Re: MISC - Stack Based vs. Register Based glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-04-05 17:33 +0000
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-06 17:37 -0400
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-05 18:08 -0400
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-06 17:32 -0400
                Re: MISC - Stack Based vs. Register Based Brian Davis <brimdavis@aol.com> - 2013-04-07 14:59 -0700
                Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-08 01:16 -0400
                Re: MISC - Stack Based vs. Register Based albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-04-08 09:52 +0000
            Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-03 22:42 -0400
            Re: MISC - Stack Based vs. Register Based Alex McDonald <blog@rivadpm.com> - 2013-04-04 16:07 -0700
              Re: MISC - Stack Based vs. Register Based glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-04-05 04:10 +0000
                Re: MISC - Stack Based vs. Register Based Alex McDonald <blog@rivadpm.com> - 2013-04-04 23:49 -0700
    Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-02 12:04 -0400
      Re: MISC - Stack Based vs. Register Based "Rod Pemberton" <do_not_have@notemailnotq.cpm> - 2013-04-03 20:35 -0400
        Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-04 00:09 -0400
  Re: MISC - Stack Based vs. Register Based the_gavino_himself <visphatesjava@gmail.com> - 2013-04-02 11:17 -0700
  Re: MISC - Stack Based vs. Register Based Syd Rumpo <usenet@nononono.co.uk> - 2013-04-04 09:38 +0100
    Re: MISC - Stack Based vs. Register Based Arlet Ottens <usenet+5@c-scape.nl> - 2013-04-04 11:31 +0200
      Re: MISC - Stack Based vs. Register Based "Elizabeth D. Rather" <erather@forth.com> - 2013-04-04 08:36 -1000
        Re: MISC - Stack Based vs. Register Based Brad Eckert <hwfwguy@gmail.com> - 2013-04-05 10:21 -0700
          Re: MISC - Stack Based vs. Register Based "Elizabeth D. Rather" <erather@forth.com> - 2013-04-05 07:53 -1000
    Re: MISC - Stack Based vs. Register Based glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-04-04 12:49 +0000
      Re: MISC - Stack Based vs. Register Based Arlet Ottens <usenet+5@c-scape.nl> - 2013-04-04 15:02 +0200
    Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-04 18:57 -0400
  Re: MISC - Stack Based vs. Register Based AKE <assadebrahim2000@gmail.com> - 2013-04-05 15:29 -0700
    Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-05 19:32 -0400
      Re: MISC - Stack Based vs. Register Based anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-04-06 14:16 +0000
        Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-06 15:50 -0400
          Re: MISC - Stack Based vs. Register Based mhx@iae.nl (Marcel Hendrix) - 2013-04-07 01:33 +0200
            Re: MISC - Stack Based vs. Register Based AKE <assadebrahim2000@gmail.com> - 2013-04-07 02:57 -0700
              Re: MISC - Stack Based vs. Register Based stephenXXX@mpeforth.com (Stephen Pelc) - 2013-04-07 11:02 +0000
              Re: MISC - Stack Based vs. Register Based anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-04-07 13:51 +0000
                Re: MISC - Stack Based vs. Register Based "Elizabeth D. Rather" <erather@forth.com> - 2013-04-07 09:16 -1000
            Re: MISC - Stack Based vs. Register Based anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-04-07 14:13 +0000
              Re: MISC - Stack Based vs. Register Based mhx@iae.nl (Marcel Hendrix) - 2013-04-07 17:14 +0200
                Re: MISC - Stack Based vs. Register Based anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-04-07 15:31 +0000
            Re: MISC - Stack Based vs. Register Based Bernd Paysan <bernd.paysan@gmx.de> - 2013-04-08 18:53 +0200
          Re: MISC - Stack Based vs. Register Based anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-04-07 14:22 +0000
  Re: MISC - Stack Based vs. Register Based "WJ" <w_a_x_man@yahoo.com> - 2013-04-14 00:19 +0000
    Re: MISC - Stack Based vs. Register Based rickman <gnuarm@gmail.com> - 2013-04-14 09:44 -0400
    Re: MISC - Stack Based vs. Register Based Brad Eckert <hwfwguy@gmail.com> - 2013-04-15 09:39 -0700
      Re: MISC - Stack Based vs. Register Based Bernd Paysan <bernd.paysan@gmx.de> - 2013-04-15 19:28 +0200

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