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Re: Silly question about ARM thumb
- From: Grant Edwards <grante at visi dot com>
- To: Øyvind Harboe <oyvind dot harboe at zylin dot com>
- Cc: ecos-discuss at sources dot redhat dot com
- Date: Tue, 22 Feb 2005 09:48:19 -0600
- Subject: [ECOS] Re: Silly question about ARM thumb
- References: <1109078758.3866.7.camel@localhost.localdomain>
On Tue, Feb 22, 2005 at 02:25:58PM +0100, Øyvind Harboe wrote:
> If the code is smaller and faster,
It's not. It's slower.
> why aren't all ARM programs compiled w/ARM thumb?
> This posting quotes 20% code size decrease and 50% speed increase.
>
> http://sourceware.org/ml/ecos-discuss/2002-11/msg00036.html
I don't think the speed increase is something that is seen in
the general case. Perhaps the 20% size decrease allowed the
entire inner loop to stay resident in cache or something like
that?
--
Grant Edwards
grante@visi.com
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