[HN Gopher] Exploring the native use of 64-bit posit arithmetic ...
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       Exploring the native use of 64-bit posit arithmetic in scientific
       computing
        
       Author : PaulHoule
       Score  : 44 points
       Date   : 2023-05-12 17:57 UTC (5 hours ago)
        
 (HTM) web link (arxiv.org)
 (TXT) w3m dump (arxiv.org)
        
       | andrepd wrote:
       | Posits are pretty cool. I hacked a relatively high-performance
       | implementation in ocaml.
       | 
       | They're really elegant.
        
       | mncharity wrote:
       | Posit standard[1]; intro[2]; interactive graphic[4].
       | 
       | [1] https://posithub.org/docs/posit_standard-2.pdf [2]
       | https://posithub.org/docs/Posits4.pdf [4]
       | https://cse512-19s.github.io/FP-Well-Rounded/
        
         | amelius wrote:
         | ACM article:
         | 
         | https://www.sigarch.org/posit-a-potential-replacement-for-ie...
         | 
         | Original paper:
         | 
         | https://dl.acm.org/doi/10.14529/jsfi170206
        
           | mncharity wrote:
           | Here's that paper's pdf[1]. ACM... sigh.
           | 
           | [1]
           | http://www.johngustafson.net/pdfs/BeatingFloatingPoint.pdf
        
             | PaulHoule wrote:
             | That paywall is symptomatic of the ACM being a professional
             | society for computer science professors and not software
             | practitioners. If you go to the editorial section of CACM
             | it is frequently stuck in a loop as every decade or so
             | there are violent ups and downs of CS program enrollment
             | driven by the realization that "cs students are in demand"
             | and then "IT jobs suck", the latter of which could be
             | addressed by having a professional society for software
             | practitioners...
        
       | g0xA52A2A wrote:
       | Slides from this year's CoNGA (Conference on Next Generation
       | Arithmetic) are available here [1]. Not sure if there are video
       | recordings to come.
       | 
       | [1] https://posithub.org/conga/2023/#schedules
        
       | Zeetah wrote:
       | What is quire? I couldn't find anything that made sense in the
       | way it is referred to in the paper.
        
         | andrepd wrote:
         | Simply put: an accumulator (in fixes-point format) with enough
         | bits to calculate dot products with up to 2^31 terms with NO
         | loss of precision.
        
         | phkahler wrote:
         | I believe it's something like an accumulator that has higher
         | precision than the data types being used. It helps reduce
         | rounding errors by maintaining extra bits until you store a
         | final result.
        
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       (page generated 2023-05-12 23:00 UTC)