DMD floating point performance.

[Walter Bright]

Don Clugston wrote:
> The definitive article on this is Agner Fog's optimisation manual at 
> www.agner.org. It's fantastically difficult to do x87 perfectly (and 
> this is probably the main appeal of SSE), but I'm sure there are massive 
> gains to be had relatively cheaply.

Thanks, it's a great reference I didn't know existed. But I couldn't 
find anything specific about enregistering ST register algorithms.