https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107753
--- Comment #9 from Steve Kargl <sgk at troutmask dot apl.washington.edu> --- On Fri, Nov 18, 2022 at 11:24:29PM +0000, sgk at troutmask dot apl.washington.edu wrote: > > Does anyone know what is meant by "Fortran rules"? F66 does not > have any particular algorithm specified. I'll look at F77 shortly. > Well, I hunted down the origins of -fcx-fortran-rules. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29549 So, it appears to be an optimization, where Smith's algorithm will fail for extreme values of the real and imaginary parts of the complex number.
