From: no.email@nospam.invalid   
      
   dxf  writes:   
   > As for SSE2 it wouldn't exist if industry didn't consider   
   > double-precision adequate.   
      
   SSE2 is/was first and foremost a vectorizing extension, and it has been   
   superseded quite a few times, indicating it was never all that   
   adequate.  I don't know whether any of its successors support extended   
   precision though.   
      
   W. Kahan was a big believer in extended precision (that's why the 8087   
   had it from the start).  I believes IEEE specifies both 80 bit and 128   
   bit formats in addition to 64 bit.  The RISC-V spec includes encodings   
   for 128 bit IEEE but I don't know if any RISC-V hardware actually   
   implements it.  I think there are some IBM mainframe CPUs that have it.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)