[Info-vax] Roadmap

[John Reagan]

On Friday, January 4, 2019 at 10:55:14 AM UTC-5, Bob Koehler wrote:
> In article <q0mfpv$mqc$1 at dont-email.me>, "Craig A. Berry" <craigberry at nospam.mac.com> writes:
> > 
> > Yes, my mistake, I did mean X_FLOAT. H_FLOAT was also 128-bit double but
> > I think that died with the VAX.
> > 
> 
>    IIRC, Alpha supported all the VAX floating point formats, plus the
>    IEEE, except that IEEE 128 bit wasn't actually implemented in
>    hardware.  Or at least not in EV4.
> 
>    Or did they do the same to H_FLOAT?

No software support for H on Alpha, only X.  As Phillip just mentioned, only D was to convert to/from G.  [VEST did support H for translated VAX images]

On Itanium, F converts to IEEE S for operations and back to F.  D/G convert to IEEE T and back to F.  Software support for X.

On Itanium, the default switched to IEEE floating and almost nobody noticed.  Anybody here have to use /FLOAT=G on Itanium?