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Re: [ballen@uwm.edu] libc/2269: triginometric argument reduction error in libm
- To: Bruce Allen <ballen at gravity dot phys dot uwm dot edu>
- Subject: Re: [ballen@uwm.edu] libc/2269: triginometric argument reduction error in libm
- From: Ulrich Drepper <drepper at redhat dot com>
- Date: 20 May 2001 13:20:44 -0700
- Cc: Geoff Keating <geoffk at redhat dot com>, aj at suse dot de, libc-alpha at sources dot redhat dot com, ballen at uwm dot edu, moshier at mediaone dot net
- References: <Pine.GSO.4.21.0105201458500.6510-100000@dirac>
- Reply-To: drepper at cygnus dot com (Ulrich Drepper)
Bruce Allen <ballen@gravity.phys.uwm.edu> writes:
> (1) The sin and other trig functions have exact values for all normalized
> IEEE floats.
This is absolutely beside the point. If you have a computation where
you need trigonometric functions and you have values large enough to
have problems with the range reduction, your computations are already
so completely wrong that it is of no help to slow down the
implementations of the trigonometric functions. Fix your program.
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