[Cfp-interest 1854] Re: Negative zero

Damian McGuckin damianm at esi.com.au
Sat Nov 21 21:08:40 PST 2020


On Sat, 21 Nov 2020, Fred J. Tydeman wrote:

> On Sun, 22 Nov 2020 11:30:53 +1100 (AEDT) Damian McGuckin wrote:
>>
>> Out of curiosity, how many chipsets in use today still use an extended IEC60559 format?
>
> I believe that all of Intel x86 chips with its x87 FPU use the 80-bit 
> extended format.

Sorry, I should have summarized what I know.

The Itaniums also have that format I believe.,

As do some old Motorola chipsets although they the Motorola variant which 
is 96 bits wide (with 16 unused bits in the middle from memory)

I was just curious if anybody has designed and built a chipset in the 
last 20 decades which used the 80-bit extended format.

I have never seen a 44-bit extended format in my life.

Regards - Damian

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