[LAD] is this a compiler issue??

[Tim Goetze]

[Conrad Berhörster]
>i have written a channel class, which collects data from (file) sources and 
>copies it to a buffer. Jack will get this buffer and put it into his streams. 
>So far, I think, this is a normal design with the following code
>
>for (unsigned int n = 0; n < nframes; ++n)
>{
>	   pBuffer[n] += pFrames[n];
>	   pBuffer[n]  *= volume;
>}
>
>i know, it's not really optimized. But it works as an example. as you can 
>think, pBuffer and pFrames are float* and volume is also a float. 
>
>now it happens, when the volume is 0, after 3-5 seconds, the CPU will run into 
>100%. 
>
>a workaround is the following before the loop 
>
>	if(volume < 0.0000001)
>		volume = 0.0000001;
>
>But i try to understand, what happens here. Is the compiler overoptimizing 
>zeros. 

It'd be a lot more helpful to see the full source but from what you're 
writing I'd be willing to bet you're encountering denormals.

Cheers, Tim