I have been -- this has taken up much of the past month. The better double-double libraries are very good +,-,*,^, exp, slightly less so with /; I found some trig lsbs to be wiggly.
I hand down-converted some quad-double algorithms and routines to be triple-double work-alikes. I use them internally to obtain an exported type that is numerically smoother. On Saturday, October 17, 2015 at 4:12:44 PM UTC-4, Steven G. Johnson wrote: > > > > On Saturday, October 17, 2015 at 9:39:54 AM UTC-4, Jeffrey Sarnoff wrote: >> >> I am working on routines for a double-double-like floating point type. >>> >>> > There are plenty of such libraries already existing as free/open-source > software. Why not crib from them? >
