Re: [Linuxsampler-devel] resampling benchmarks, sampler module, effect sends

[Richard A. S. <rs...@bi...>]

On 13 Nov 2002 17:47:14 +0100, Benno Senoner wrote:

> The strange thing is that on most modern x86 CPUs using doubles is as
> fast/faster than floats. That's good :-)
> 

Perhaps thats due to data bus size and the FPU size.  Modern x86s
FPUs are 80-bit IIRC.  The data bus is 64 bits wide so fetching a
double or float from memory take the same ammount of cycles.

Perhaps going from a 32-bit float to the 80 bit FPU format involves a
cast that uses more cycles than a 64 bit double to 80-bit.



--
Richard A. Smith                         Bitworks, Inc.               
rs...@bi...               479.846.5777 x104                        
Sr. Design Engineer        http://www.bitworks.com