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RE: [avr-gcc-list] GCC code gen on xmega

From: Weddington, Eric
Subject: RE: [avr-gcc-list] GCC code gen on xmega
Date: Mon, 16 Feb 2009 10:51:17 -0700


> -----Original Message-----
> From: 
> address@hidden 
> [mailto:address@hidden
> org] On Behalf Of larry barello
> Sent: Monday, February 16, 2009 10:37 AM
> To: address@hidden
> Subject: [avr-gcc-list] GCC code gen on xmega
> Finally, I suppose if it was simple it would have been done 
> already:

You can't always make that assumption. ;-)

> if
> there are multiple calls to "printf" and friends, the entire 
> sequence of
> setting up and tearing down the stack occurs over and over 
> again - and that
> is on top of any setup and teardown performed for the function (say, a
> buffer on the stack).   
> In general, this kind of code inefficiency doesn't bother me 
> much because I
> usually factor the routines to minimize the code, and the 
> processor is so
> blazingly fast I don't care about the cycles. I just noticed 
> this while
> looking for code sequences that might cause stack corruption.

Well, printf and friends are not very efficient anyway. Patches welcome.

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