1. What's the computational cost of such changes? 2. What is the impact on TR? 3.
On Jun 30, 2012, at 9:15 PM, Neil Toronto wrote: > I've noticed something interesting about the `log' function. Check out this > interaction: > > > (real->double-flonum #e1e400) > +inf.0 > > (log #e1e400) > 921.0340371976183 > > It's obviously not just converting to flonum first; it's likely doing some > kind of argument reduction internally. > > `sqrt' operates on superfloat numbers when they're perfect squares, and `sin' > doesn't at all: > > > (sqrt #e1e400) > [1e200 written out] > > (sqrt #e1e401) > +inf.0 > > (sin #e1e400) > +nan.0 > > I have two questions: > > 1. I think I have the Mad Skillz to make these work by wrapping the > primitives with something that does argument reduction. Should I? (It should > be especially interesting to do `sin', requiring an arbitrary-precision `pi' > constant. Woo!) > > 2. Under what circumstances should sublinear `math' library functions do > this? All of them? > > Neil ⊥ > _________________________ > Racket Developers list: > http://lists.racket-lang.org/dev _________________________ Racket Developers list: http://lists.racket-lang.org/dev
