[CM] s7: Whether to use WITH_GMP
k.s.matheussen at gmail.com
Fri Apr 14 04:54:05 PDT 2017
Thank you. How about float vs. integer? Is gmp
used only for integers, or is it used for floats as well?
In Radium, I think only calculations with floating
points are important to be fast. And only
integer calculations needs to be accurate. Big-number
accuracy for floating points are probably not important,
and normal 64 bit "double" should be good enough.
Would it make sense to enable gmp for s7 in Radium
before the optimizer is rebuilt?
On Fri, Apr 14, 2017 at 1:41 PM, <bil at ccrma.stanford.edu> wrote:
> In the gmp version, it's probably safest to assume
> everything is going through gmp. In cases where the
> optimizer can ascertain ranges, s7 will use
> faster code, but I just tore out half the optimizer,
> and am rebuilding it. So I don't know how the
> in-between stuff interacts with gmp -- give me a
> month or two! My old timings indicated that gmp
> could be 10 to 50 times slower than straight C (but at
> least it gave the right answer).
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