[Info-vax] Roadmap

[Dave Froble]

On 1/4/2019 2:01 PM, John Reagan wrote:
> 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?
>

Well, just to be contrary, we still use D-float on the itanic ....

I think ....

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David Froble                       Tel: 724-529-0450
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