Re: [Freetel-codec2] options wanted-codec2 stmf4 code optimization question

[David R. <da...@ro...>]

Hi Glen,

There are no specific optimisations for the STM32F4 that I can recall.

I spent a few weeks last year making the modem and codec run fast enough 
for the STM32F4 by re-arranging some of the building blocks at the C 
code level.  These changes were folded back into the source code now 
used on all platforms.

Cheers,

David


On 28/07/15 09:24, glen english wrote:
> Hi All
> I am considering retargeting codec2 / sm1000 etc for another micro . a
> '21477.
> and this will include a rather strong modem.
> (or I might stick with stm32F7)
>
> In opinion, just how much of the STMF4 code for codec2 is hard optimized
> for the stm?
>
> Without spending alot of time looking at it, I am wondering abut the
> implications for me of using a different processor. IE how much stuff is
> tightly coupled to the way the stmf4 works ?
>
> Part of the deal with getting micros like the M4 to really fly in DSP
> land (and get them even close to their pure DSP brothers)  are tightly
> writing to the processor  and compiler architectures.
>
> all opinions welcome.
>
> next step will be actually compiling for sharc and seeing what happens.
> I expect an 'average' result- as the stmf4 is good for multipurpose
> things, but the SHARC compilers are not. Or rather, the sharc compiler
> does not in generally utilize the very rich instruction set available to
> it- only about half of the very fancy instructions of the sharc are
> used, leading to lacklustre performance for GP computing.
>
>
> glen Vk1XX
>
>
>
>
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