[PATCH] fix for accuracy problem in atan2f
Bob Wilson
bwilson@tensilica.com
Wed Jul 20 15:59:00 GMT 2005
This patch fixes a problem with the accuracy of atan2f by changing to
use the round-to-nearest value of pi. See
http://lists.freebsd.org/pipermail/cvs-all/2004-June/067012.html for a
better description of the issue. A similar change was made to glibc
back in July 1997, but there was a typo in that change, for which I have
just submitted a patch:
http://sources.redhat.com/ml/libc-alpha/2005-07/msg00042.html. See my
glibc patch if you want a testcase to demonstrate the problem.
2005-07-20 Bob Wilson <bob.wilson@acm.org>
Darin Petkov <darin@tensilica.com>
* libm/math/ef_atan2.c (pi, pi_lo): Use round-to-nearest value
of pi.
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