------- Comment #2 from joseph at codesourcery dot com 2006-01-04 16:47 ------- Subject: Re: Wrong long double to float conversion
On Wed, 4 Jan 2006, pinskia at gcc dot gnu dot org wrote: > Hmm, actually there is no rounding from TF to DF except for the fact that > upper > potion of the TF mode is taken only. > > I am thinking this testcase is invalid for 128bit IBM long double format. > > IBM 128bit long double format is not IEEE 128bit format at all. C99 Annex F allows non-IEC 60559 formats for long double and it seems conversions from such types to float must follow the IEC 60559 rules. Do you have a pointer to a specification for double+double long double which does something other than compute to infinite precision then round to nearest representable value according to current rounding mode? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25661
