[linux-audio-dev] Denormal numbers

[Simon Jenkins]

Steve Harris wrote:

>On Sun, Aug 03, 2003 at 07:47:31 +0100, Simon Jenkins wrote:
>  
>
>>Here's where I've got to so far. Comments are welcome.
>>    
>>
>
>Looks fine in theory, but it forces an extra branch per MUL, which is not
>really practical.
>
Its only an extra branch on the MULs where you actually use it. I'm not 
suggesting
replacing every multiplication everywhere with this, but to pinpoint 
*exactly*
the MUL that might first produce a denormal (*if* that is actually a 
potential
problem in an app) and replacing just one crucial multiplication with a 
flushing
function, which hopefully will propogate the zero through the rest of the
calculation.

>I haven't had a chance to try your fixes to FLUSH_TO_ZERO, but I'l try
>this week.
>
They definitely fix actual problems, but I'm not at all convinced that they
fix all problems. I suspect that its still broken. If so then my 
flushing multiply
functions are possibly (but not definitely) broken in the same way.

Simon Jenkins
(Bristol, UK)