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Groups > comp.sys.acorn.programmer > #1833

Re: Alignment exception examples

From druck <news@druck.org.uk>
Newsgroups comp.sys.acorn.programmer
Subject Re: Alignment exception examples
Date 2012-06-26 21:57 +0100
Organization A noiseless patient Spider
Message-ID <jsd7nt$6m7$1@dont-email.me> (permalink)
References (1 earlier) <cb1d41a1-9593-4bdd-81be-3837bf4da461@googlegroups.com> <js6qi6$71i$1@dont-email.me> <a0ac7007-cb3a-41e2-a718-c517e775ca9c@googlegroups.com> <GBo*8TJ+t@news.chiark.greenend.org.uk> <81a082e3-62c4-485d-892c-7f2b04e9b038@googlegroups.com>

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On 26/06/2012 09:15, chrisbazley@bigfoot.com wrote:
> On Tuesday, June 26, 2012 12:02:08 AM UTC+1, Theo Markettos wrote:
>> Compile everything for VFP and expand FPEmulator to cope with
>> those instructions too.  Old hardware emulates instructions just as
>> slow as it always has, and new hardware runs a lot faster.  Old
>> apps use FPA instructions as before.
>>
>> How about it?
>>
>> Theo
>
> I think you forgot something: ARM3+FPA, ARM7500FE and emulated
> machines would boot slower with less free memory and run recompiled
> apps an order of magnitude slower.

Do we care about FP performance on extremely old and slow hardware?

All my 32bit conversions broke compatibility with the ARM2/3 due to the 
use of MRS/MSR instructions. I've not had one complaint in the last 6 
years. So I think the RISC OS world can stand a modicum of progress and 
drop support for things produced 3 decades ago.

---druck

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Thread

Alignment exception examples druck <news@druck.org.uk> - 2012-06-23 20:55 +0100
  Re: Alignment exception examples chrisbazley@bigfoot.com - 2012-06-23 13:21 -0700
    Re: Alignment exception examples druck <news@druck.org.uk> - 2012-06-24 11:35 +0100
      Re: Alignment exception examples chrisbazley@bigfoot.com - 2012-06-24 04:02 -0700
        Re: Alignment exception examples druck <news@druck.freeuk.com> - 2012-06-24 17:29 +0100
        Re: Alignment exception examples Theo Markettos <theom+news@chiark.greenend.org.uk> - 2012-06-26 00:02 +0100
          Re: Alignment exception examples chrisbazley@bigfoot.com - 2012-06-26 01:15 -0700
            Re: Alignment exception examples Theo Markettos <theom+news@chiark.greenend.org.uk> - 2012-06-26 11:51 +0100
              Re: Alignment exception examples chrisbazley@bigfoot.com - 2012-06-27 05:40 -0700
                Re: Alignment exception examples druck <news@druck.org.uk> - 2012-06-27 22:43 +0100
            Re: Alignment exception examples Martin Bazley <martin.bazley@blueyonder.co.uk> - 2012-06-26 14:06 +0100
            Re: Alignment exception examples druck <news@druck.org.uk> - 2012-06-26 21:57 +0100
              Re: Alignment exception examples Martin Bazley <martin.bazley@blueyonder.co.uk> - 2012-06-26 23:20 +0100
                Re: Alignment exception examples druck <news@druck.org.uk> - 2012-06-27 22:51 +0100
              Re: Alignment exception examples chrisbazley@bigfoot.com - 2012-06-26 15:17 -0700
                Re: Alignment exception examples Theo Markettos <theom+news@chiark.greenend.org.uk> - 2012-06-27 00:23 +0100
                Re: Alignment exception examples chrisbazley@bigfoot.com - 2012-06-27 05:52 -0700
                Re: Alignment exception examples druck <news@druck.org.uk> - 2012-06-27 22:46 +0100
                Re: Alignment exception examples Nick Roberts <tigger@orpheusinternet.co.uk> - 2012-06-28 18:28 +0100
                Re: Alignment exception examples Theo Markettos <theom+news@chiark.greenend.org.uk> - 2012-06-29 18:38 +0100
                Re: Alignment exception examples Nick Roberts <tigger@orpheusinternet.co.uk> - 2012-06-29 20:14 +0100
                Re: Alignment exception examples druck <news@druck.freeuk.com> - 2012-07-04 20:50 +0100
                Re: Alignment exception examples spampling <spam.pling@btinternet.com> - 2012-06-27 07:58 +0100
                Re: Alignment exception examples chrisbazley@bigfoot.com - 2012-06-27 05:44 -0700
                Re: Alignment exception examples spampling <spam.pling@btinternet.com> - 2012-06-27 18:13 +0100
                Re: Alignment exception examples druck <news@druck.org.uk> - 2012-06-27 22:47 +0100
                Re: Alignment exception examples druck <news@druck.org.uk> - 2012-06-27 23:04 +0100
                Re: Alignment exception examples chrisbazley@bigfoot.com - 2012-06-28 15:43 -0700
  Re: Alignment exception examples Thomas Milius <Thomas-Milius@t-online.de> - 2012-06-24 08:24 +0200
    Re: Alignment exception examples druck <news@druck.org.uk> - 2012-06-24 11:37 +0100
      Re: Alignment exception examples Thomas Milius <Thomas-Milius@t-online.de> - 2012-06-24 12:49 +0200
        Re: Alignment exception examples druck <news@druck.freeuk.com> - 2012-06-24 17:01 +0100
          Re: Alignment exception examples Thomas Milius <Thomas-Milius@t-online.de> - 2012-06-24 19:16 +0100
            Re: Alignment exception examples "Ste (news)" <steve@revi11.plus.com> - 2012-07-10 00:14 +0100
  Re: Alignment exception examples Steve Fryatt <news@stevefryatt.org.uk> - 2012-06-24 09:42 +0100
  Re: Alignment exception examples Martin <News03@avisoft.f9.co.uk> - 2012-06-27 15:36 +0100

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