Re: [boost] Back to Boost.SIMD - Some performances ...

Subject: Re: [boost] Back to Boost.SIMD - Some performances ...
From: Joel Falcou (joel.falcou_at_[hidden])
Date: 2009-03-26 15:08:18

Michael Fawcett a écrit :
> Joel, how does the extension detection mechanism work? Is there as 
> mall runtime penalty for each function as it detects which path would 
> be optimal, or can you define at compile-time what extensions are 
> available (e.g. if you are compiling for a fixed hardware platform, 
> like a console).
I have a #ifdef/#elif structure that detects which extension have been 
set up ont he compiler and I match this with a platform detection to 
know where to jump and how to overload some functions or class definition.

I tried the runtime way and it was fugly slow. So I'm back to a 
compile-time detection as performance was critical.

-- 
___________________________________________
Joel Falcou - Assistant Professor
PARALL Team - LRI - Universite Paris Sud XI
Tel : [phone]