Fast math lib

[gav_b]

Wondering if there is a fast math lib available somewhere to replace math.h

[helium]

The most operations in <cmath> (or <math.h> if you programm in plain old C) could only be faster if they are instrinsic, but that's a matter of the compiler not the library.

[stefancrs]

Or taking advantage of SSE / MMX / Whatnot. But to make such a library I guess it's most suited for algebra.

[gav_b]

Thanks for the info.

Was looking at Intels Vector Math Library, but from what I gather this works on vectors and not scalers, which is what I need.

My main problem is that I have a lot of exp(...) and tan(...) calls and its choking my processor.

[Borogove]

My main problem is that I have a lot of exp(...) and tan(...) calls and its choking my processor.

If the input domain of those functions is controllable, consider using a table lookup or polynomial approximation to them.

Most math libraries not specifically designed for audio are going to be more concerned with accuracy than audio needs.

[stefancrs]

Yeah. Google for some taylor series for exp and tan

[helium]

lookm for a compiler switch that disables IEEE-compatibility. E.g. -ffast-math on gcc. You can gain a lot of speed by doing this.