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Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi)

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In article <d8a3df8252.martin@blueyonder.co.uk>, Martin Bazley
<URL:mailto:martin.bazley@blueyonder.co.uk> wrote:
> The following bytes were arranged on 19 Apr 2012 by Chris Evans :
> 
> > The basic question is will all(?) those programs that needed updating from
> > ARMv5 to ARMv7 also need to be updated for the Raspberry Pi?
> >
> > and therefore may some Iyonix compatible programs that haven't been updated
> > work on the Raspberry without modification?
> 
> Sorry, but no.  The big change we usually talk about when we say "ARMv7
> compatible" is the unaligned memory access problem, and that was
> introduced in ARMv6 (but we had ARMv7 RISC OS computers before we had
> ARMv6 ones, hence the ARMv7 name stuck).  As I understand it, the
> differences between ARMv6 and ARMv7 are mainly to do with floating
> point.
> 
> So if you were hoping for a free Raspberry Pi lunch - forget it!

Thanks

Oh well. If you don't ask you don't learn!
At least I will now be able to explain correctly the situation to non
programers. 

p.s. I was told how to patch !Prophet for the BeagleBoard (Can't find the
details at present) IIRC it involved removing a ^ from towards the end of a
load or store assembler instruction. Is that to do with unaligned memory
access.

Pity you can't google ^

Chris Evans

-- 
CJE Micro's / 4D                'RISC OS Specialists'
Telephone: 01903 523222             Fax: 01903 523679
chris@cjemicros.co.uk     http://www.cjemicros.co.uk/
78 Brighton Road, Worthing, West Sussex,     BN11 2EN
The most beautiful thing anyone can wear, is a smile!

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ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Chris Evans <chris@cjemicros.co.uk> - 2012-04-19 13:05 +0100
  Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Martin Bazley <martin.bazley@blueyonder.co.uk> - 2012-04-19 14:15 +0100
    Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Chris Evans <chris@cjemicros.co.uk> - 2012-04-19 16:10 +0100
      Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2012-04-19 18:41 +0200
      Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Steve Fryatt <news@stevefryatt.org.uk> - 2012-04-19 19:46 +0100
        Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Martin Wuerthner <spamtrap@mw-software.com> - 2012-04-19 21:24 +0200
  Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2012-04-19 18:32 +0200
  Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) chrisbazley@bigfoot.com - 2012-04-29 06:37 -0700
    Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Martin Bazley <martin.bazley@blueyonder.co.uk> - 2012-04-29 15:47 +0100
    Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Gerph <gerph@gerph.org> - 2012-04-29 07:39 -0700
    Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) druck <news@druck.org.uk> - 2012-04-29 19:30 +0100
    Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2012-04-30 06:16 +0200
      Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) druck <news@druck.org.uk> - 2012-04-30 22:47 +0100
      Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Gerph <gerph@gerph.org> - 2012-04-30 15:30 -0700
        Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2012-05-02 19:26 +0200
          Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Gavin Wraith <gavin@wra1th.plus.com> - 2012-05-02 21:02 +0100
          Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) druck <news@druck.org.uk> - 2012-05-02 22:33 +0100
            Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) cferris@freeRemoveuk.com.invalid - 2012-05-02 23:37 +0100
              Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2012-05-03 06:25 +0200
              Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) trevj <trevj@cwazy.co.uk> - 2012-05-03 13:01 -0700
          Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2012-05-04 06:30 +0200
            Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Martin Wuerthner <spamtrap@mw-software.com> - 2012-05-04 11:55 +0200
              Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Matthew Phillips <spam2011m@yahoo.co.uk> - 2012-05-04 22:39 +0100
            Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2012-05-05 17:58 +0200
              Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Theo Markettos <theom+news@chiark.greenend.org.uk> - 2012-05-05 17:22 +0100
        Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Simon <simon.willcocks@t-online.de> - 2012-05-04 04:24 -0700
      Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Theo Markettos <theom+news@chiark.greenend.org.uk> - 2012-05-01 21:33 +0100
        Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Gerph <gerph@gerph.org> - 2012-05-01 17:06 -0700
        Re: ARMv5, ARMv6 & ARMv7 (Programs for the Raspberry Pi) Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2012-05-02 19:02 +0200

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