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Groups > comp.os.linux.advocacy > #104559
| From | Grant Edwards <invalid@invalid.invalid> |
|---|---|
| Newsgroups | comp.os.linux.advocacy, comp.os.linux.embedded, uk.comp.os.linux |
| Subject | Re: ARM now as powerful as Intel chips |
| Date | 2012-05-04 13:20 +0000 |
| Organization | PANIX Public Access Internet and UNIX, NYC |
| Message-ID | <jo0l3m$pji$1@reader1.panix.com> (permalink) |
| References | <kCAor.226075$dO.12759@fx29.am4> <GJ6dnWqFj9Z6ZT_SnZ2dnUVZ_qGdnZ2d@bresnan.com> <zLqdnd7TGpFr4j7SnZ2dnUVZ8h6dnZ2d@lyse.net> |
Cross-posted to 3 groups.
On 2012-05-04, David Brown <david@westcontrol.removethisbit.com> wrote:
>> But will the arms be data alignment tolerant like the Intels are?
>
> It will probably be as tolerant as x86/amd64 - i.e., misaligned data
> works for simple stuff, but at much lower performance, and completely
> screws any difficult things like precise ordering for inter-process
> and inter-thread communication.
Finally! I've used a number ARM cores (ARM7, ARM9, StrongARM) and
none of them ever support misaligned data. But, neither did the
SPARC, 68K, PDP-11, and many others -- so it's not like anybody with a
clue expected misaligned data access to work without checking the
processor specs).
It looks like the ARMv6 and ARMv7 do -- at least for simple load/store
operations. There appear to still be alignment requirements for the
fancy bits like multiple-register load/store operations.
--
Grant Edwards grant.b.edwards Yow! Youth of today!
at Join me in a mass rally
gmail.com for traditional mental
attitudes!
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ARM now as powerful as Intel chips 7 <email_at_www_at_enemygadgets_dot_com@enemygadgets.com> - 2012-05-03 20:01 +0100
Re: ARM now as powerful as Intel chips OldGoat <oats@farmerbrowns.com> - 2012-05-03 15:30 -0600
Re: ARM now as powerful as Intel chips David Brown <david@westcontrol.removethisbit.com> - 2012-05-04 09:05 +0200
Re: ARM now as powerful as Intel chips Grant Edwards <invalid@invalid.invalid> - 2012-05-04 13:20 +0000
Re: ARM now as powerful as Intel chips David Brown <david@westcontrol.removethisbit.com> - 2012-05-04 16:09 +0200
Re: ARM now as powerful as Intel chips OldGoat <oats@farmerbrowns.com> - 2012-05-04 12:00 -0600
Re: ARM now as powerful as Intel chips OldGoat <oats@farmerbrowns.com> - 2012-05-04 11:58 -0600
Re: ARM now as powerful as Intel chips Theo Markettos <theom+news@chiark.greenend.org.uk> - 2012-05-05 00:45 +0100
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