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Re: Fix tan, tanl for large inputs

From: Andreas Jaeger <aj at suse dot com>
To: libc-alpha at sourceware dot org
Date: Fri, 16 Mar 2012 20:42:44 +0100
Subject: Re: Fix tan, tanl for large inputs
References: <Pine.LNX.4.64.1203161501510.31619@digraph.polyomino.org.uk>

On 03/16/2012 04:02 PM, Joseph S. Myers wrote:

This patch fixes the problems with range reduction for tan (x86) and
tanl (x86, x86_64), using C implementations instead of fptan
instructions and adding such an implementation for ldbl-96 based on
that for ldbl-128 (again, rational function approximation not
optimized for ldbl-96, but the representation of pi/4 as a sum of two
long doubles was recomputed for ldbl-96).

Tested x86 and x86_64 and ulps updated accordingly.

Thanks a lot, this is fine!

Andreas
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References:
- Fix tan, tanl for large inputs
  - From: Joseph S. Myers

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