From: minforth@gmx.net   
      
   Am 10.07.2025 um 21:33 schrieb Paul Rubin:   
   > anton@mips.complang.tuwien.ac.at (Anton Ertl) writes:   
   >>> I believes IEEE specifies both 80 bit and 128 bit formats in addition   
   >>> to 64 bit.   
   >> Not 80-bit format.  binary128 and binary256 are specified.   
   >   
   > I see, 80 bits is considered double-extended.  "The x87 and Motorola   
   > 68881 80-bit formats meet the requirements of the IEEE 754-1985 double   
   > extended format,[12] as does the IEEE 754 128-bit binary format."   
   > (https://en.wikipedia.org/wiki/Extended_precision)   
   >   
   > Interestingly, Kahan's 1997 report on IEEE 754's status does say 80 bit   
   > is specified.  But it sounds like that omits some nuance.   
   >   
   > https://people.eecs.berkeley.edu/~wkahan/ieee754status/IEEE754.PDF   
      
   Kahan was also overly critical of dynamic Unum/Posit formats.   
      
   Time has shown that he was partially wrong:   
   https://spectrum.ieee.org/floating-point-numbers-posits-processor   
      
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