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Re: Image scaling performance

From: Leif Lindholm
Subject: Re: Image scaling performance
Date: Wed, 25 Feb 2015 15:45:40 +0000
User-agent: Mutt/1.5.21 (2010-09-15)

On Tue, Feb 24, 2015 at 11:00:41AM +0100, Michael Zimmermann wrote:
> the function seems to use __aeabi_uidiv. I'm not sure if this is a sw
> or hw implementation.
> Full code:
> ASM:
> pseudo-C:

> >> Some technical info:
> >> ARMv7
> >> Linaro GCC 4.9

I don't see any calls to any of the __aeabi helpers generated for this
file with current head. Which specific Linaro toolchain are you using?
(mine is"Linaro GCC 4.9-2014.09").

Also, scale_nn gets inlined into grub_video_bitmap_scale for me.

(Just trying to understand what is causing the difference.)


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