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Re: Image scaling performance

From: Leif Lindholm
Subject: Re: Image scaling performance
Date: Wed, 25 Feb 2015 16:20:15 +0000
User-agent: Mutt/1.5.21 (2010-09-15)

On Tue, Feb 24, 2015 at 12:39:31PM +0000, Vladimir 'phcoder' Serbinenko wrote:
> > thx I'll try that but wouldn't it make more sense to implement a hw
> > version of this function?(do I need a different compiler?)
> >
> AFAIK there isn't a consistent division instruction across all ARMs and
> which is enabled on boot time.
> You can implement hw version of division but it will crash on some machines.
> Division is a slow operation on any platform and should be avoided as far
> as possible.

For 32-bit ARM, only the later processors (Cortex-A7, -A12, -A15,
-A17) have SDIV/UDIV.


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