On Mon, Sep 18, 2017 at 09:02:22AM +0200, Janus Weil wrote: > Hi Steve, > > >> attached is a (technically) simple patch that implements the compiler > >> flag "-fdefault-real-16" for gfortran. > > > > What about -fdefault-real-10? If you're going to add bloat to the > > compiler, then you might as well to it right. > > well, yeah. If my only aim was to add bloat to the compiler out of > plain boredom and nastiness, then I might as well add > -fdefault-real-37. But I don't think that would be very useful.
Why? One gets 11-bits of additional precision (on most platforms) and a significant increase in the exponent range (+- ~1024 to +- ~16384). REAL(10) maps to hardware floating point, which is faster than software quad precision. -- Steve 20170425 https://www.youtube.com/watch?v=VWUpyCsUKR4 20161221 https://www.youtube.com/watch?v=IbCHE-hONow
