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From: Stephen Montgomery-Smith <stephen@missouri.edu>
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	Stephen Montgomery-Smith <stephen@freebsd.org>
Subject: Re: bin/170206: complex arcsinh, log, etc.
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OK.  This clog really seems to work.

x*x + y*y - 1 is computed with a ULP less than 0.8.  The rest of the 
errors seem to be due to the implementation of log1p.  The ULP of the 
final answer seems to be never bigger than a little over 2.



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