https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95640
--- Comment #9 from Steve Kargl <sgk at troutmask dot apl.washington.edu> --- On Thu, Jun 11, 2020 at 10:14:21AM -0700, Steve Kargl wrote: > > IEEE-754 calls binary32, 64, 128 the basic formats (Sec. 3, p. 6): > > Five basic formats are defined in this clause: > Three binary formats, with encodings in lengths of 32, 64, and 128 bits. > Two decimal formats, with encodings in lengths of 64 and 128 bits. > > Additional arithmetic formats are recommended for extending these basic > formats (see 3.7). > > If J3 really intended that IEEE_SELECTED_REAL_KIND return a kind for one of > IEEE-754 basic formats, then it ought to say that. Looks like a defect > in the Fortran standard. > > If one looks into 3.7 (p. 14), it further recommends > > Language standards should define mechanisms supporting extendable > precision for each supported radix. > I have asked on the J3 mailing list if Section 17 should be restricted to the basic formats.
