[HN Gopher] The radix 2^51 trick
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       The radix 2^51 trick
        
       Author : shkhuz
       Score  : 41 points
       Date   : 2022-11-22 14:29 UTC (8 hours ago)
        
 (HTM) web link (www.chosenplaintext.ca)
 (TXT) w3m dump (www.chosenplaintext.ca)
        
       | tromp wrote:
       | This article may give some reassurance to people worried about
       | RISC-V not having an add with carry instruction; it's not quite
       | as useful as it appears at first sight.
        
       | erichocean wrote:
       | Well-written, thanks!
        
       | dragontamer wrote:
       | I believe the general name of this trick is "carry save
       | addition".
       | 
       | https://en.wikipedia.org/wiki/Carry-save_adder
        
       | nickdothutton wrote:
       | The sort of operation familiar to Z80 programmers back in the
       | day.
        
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       (page generated 2022-11-22 23:02 UTC)