[J3] Questions about sqrt -- mostly for vendors

[Van Snyder]

On Tue, 2019-01-29 at 15:57 -0800, Steven G. Kargl via J3 wrote:
> On Tue, Jan 29, 2019 at 06:30:26PM -0500, Ondřej Čertík via J3 wrote:
> > > If you're looking to add new intrinsic subprograms to Fortran, I
> > > think it would be more profitable to add SINPI, COSPI, TANPI,
> > > and SINCOS.  Each has an obvious benefit to Fortran programmers.

"Degree" trigonometric intrinsics are under consideration.

> > Here is what sinpi means (for people like me who didn't know):
> > 
> > https://www.mathworks.com/help/matlab/ref/sinpi.html
> > 
> 
> Whoops, sorry about lack of detail.  Both IEEE-754 2008 and
> ISO/IEC TS 18661-4 define the half-cycle trignometric functions
> cospi, sinpi, and tanpi.  Search for "n1950.pdf ISO/IEC".
> sincos is part of ISO/IEC 9899:1999.
>