[linux-audio-dev] soft synth as a plugin

[Steve Harris]

On Fri, Oct 18, 2002 at 01:39:13 +0200, Tim Goetze wrote:
> >Hmmm... My experiments with c++, dsp code and gcc (recent 2.96) did not
> >turn out very well. For some reason the optimiser totaly chokes on c++
> >code. I only tried one routine, and I'm no c++ expert, so its possible I
> >screwed something up, but it did not look encouraging. I will revisit this
> >and also try gcc3, which has much better c++ support IIRC.
> 
> from my experience the contrary is true. last time i checked the
> assembly code produced by -O3 i found nothing to object to. that
> was g++ 2.95 compiling drawing routines on rgb buffers (just ints, 
> no floats, but comparable to audio dsp in a way).

I was trying with float, lowpass filters, written in an OO style (so I
expected c++ to be faster).

The assembler output from c++ was obvously inefficient, and I
checked all the inlinging was taking place. The equivalent c was much
better.

- Steve