linuxaudio.org

On Sun, Jan 30, 2011 at 02:46:21PM +0100, Philipp Überbacher wrote:
> Thanks, I see this now after Peter did another test with quite different

quoted text
> results. I looked at it out of context because I simply don't understand

> the context. I only know what a ft does but not how it works, nor have I

> implemented a fft, so the code with its two-letter variables is

> meaningless to me.

It's not clear if Peter's test included the '+ 1e-6'. I'd expect the

result to be correct then even with -O3. If not, increasing the added

constant should fix it.
> > There's nothing funky about them, they are part of C and C++.

quoted text
>

> They were funky to me mainly because I had to look them up but also

> because operating on the bit representation requires a different mode of

> thinking. I bet it also has its own set of pitfalls.

If your machine uses BCD integers you could have some surprises...

If you don't like m <<= 1, just write m *= 2. The compiler will

very probably use a bit shift to do this even at low optimisation

levels.
Ciao,
--

FA
There are three of them, and Alleline.
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