[Cfp-interest 1276] Re: C2x_proposal_-_TS_18661-4a-2-20190213.pdf

[Ian McIntosh]

The XLC, XLC++ and XLF (Fortran) compilers have had a lot of optimization of exp functions for over 25 years now.

 - Ian

On Wed 19/03/06  1:31 PM , Jim Thomas jaswthomas at sbcglobal.net sent:
> 
> 
> > On Mar 5, 2019, at 10:59 AM, David Hough CFP pcfp at oakapp
> le.net> wrote:> 
> > 
> > We had an action item to review this.   I didn't see
> anything wrong,> although in the prior art, all the *pi and
> {log,exp}*{2,10}* functions> were implemented in Sun Solaris
> 
> I’ll add this to the prior art.
> 
> > about 30 years ago.    I don't think the C
> > compiler optimizer knew anything special about them,
> but the Fortran compiler> recognized some opportunities to simplify expressions
> involving pow of> fixed bases and expressions involving exp... - 1 and
> log 1+...>
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