On Fri, Sep 6, 2013 at 11:59 AM, Steve Kargl < s...@troutmask.apl.washington.edu> wrote:
> On Fri, Sep 06, 2013 at 07:54:46AM +0100, David Chisnall wrote: > > > > On 5 Sep 2013, at 22:09, Steve Kargl <s...@troutmask.apl.washington.edu> > wrote: > > > > > On Thu, Sep 05, 2013 at 09:52:13AM +0100, David Chisnall wrote: > > >> On 4 Sep 2013, at 23:38, Baptiste Daroussin <b...@freebsd.org> wrote: > > >> > > >>> As a result we have a lot of fallouts of ports complaining about: > > >>> undefined reference to `powl' > > >>> > > >>> It seems like libc++ is relying on a function we don't have yet > > >>> in libm, am I missing something? > > >> > > >> I've attached a diff that I'd like to commit to msun > > > > > > Why not disable libc++ from exposing these functions? > > > > Because they're in the C++ spec and they should work. > > I consider this a placeholder until we have the real versions > > in the tree (the wiki says you have coshl, sinhl, and tanhl, > > in progress, any idea of an ETA for them)? > > Well, your commit has pre-empted any discussion on whether > there would have been a better kludge. Oh well. > > Concerning coshl, sinhl, and tanhl. I had integrated bde's > code into msun and prepared a patch to commit over a week ago. > Unfortunately, my testing on sparc64 revealed a few issues > with tanhl, and Bruce and I are still discussing the fix. > > PS: I have working erfl and erfcl for ld80 archs. I'm still > testing and refining the code. It turns out that computing > the needed rational approximation is fairly difficult (at least > for me). > > -- > Steve > Not only for you , because function values are not very "smooth" , and representation by an approximation is very difficult . During many weeks , I am trying to obtain good approximations to cumulative normal distribution and its inverse , without very much success . Approximation to inverse cumulative normal distribution is much more difficult than cumulative normal distribution . I am using Fortran double precision . I think , it is necessary to use an arbitrary precision package for optimization , but I do not have any one . Thank you very much . Mehmet Erol Sanliturk _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
