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From: Terje Mathisen <terje.mathisen@tmsw.no>
Newsgroups: comp.arch
Subject: Re: Retirement hobby (was Re: 80286 protected mode)
Date: Mon, 28 Oct 2024 11:39:57 +0100
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MitchAlsup1 wrote:
> On Thu, 24 Oct 2024 5:39:52 +0000, Terje Mathisen wrote:
>=20
>> MitchAlsup1 wrote:
>>> On Wed, 23 Oct 2024 19:11:59 +0000, Terje Mathisen wrote:
>>>
>>>> MitchAlsup1 wrote:
>>>>> On Wed, 23 Oct 2024 14:25:42 +0000, Tim Rentsch wrote:
>>>>>
>>>>>> Terje Mathisen <terje.mathisen@tmsw.no> writes:
>>>>>
>>>>>>> My wife and I will both go on "permanent vacation" starting a wee=
k
>>>>>>> before Christmas. :-)
>>>>>>
>>>>>> I'm guessing that permanent vacation will be some mixture of actua=
l
>>>>>> vacation and self-chosen "work".=C3=83=E2=80=9A=C3=82=C2=A0 In any=
 case I hope you both=20
>>>>>> enjoy
>>>>>> the time.
>>>>>
>>>>> Just remember, retirement does not mean you "stop working"
>>>>> it means you "stop working for HIM".
>>>>
>>>> Exactly!
>>>>
>>>> I have unlimited amounts of potential/available mapping work, and I =
do
>>>> want to get back to NTP Hackers.
>>>>
>>>> We recently started (officially) on the 754-2029 revision.
>>>
>>> Are you going to put in something equivalent to quires ??
>=20
> In posits, a quire is an accumulator with as many binary digits
> as to cover max-exponent to min-exponent; so one can accumulate
> an essentially unbounded number of sums without loss of precision
> --to obtain a sum with a single rounding.

OK, I have seen and used "Super-accumulator" as the term for those, I=20
have thought about implementing one in carry-save redundant form, but=20
that might be more redundancy than really needed?

Having a carry bit for every byte should still make it possible to=20
handle several additions/cycle, right?

I'm assuming the real cost is in the alignment network needed to route=20
incoming addends into the right slice.

Terje

--=20
- <Terje.Mathisen at tmsw.no>
"almost all programming can be viewed as an exercise in caching"