tree fc9cd7ed8de7a3ddb312c6f3134627085d9eff01
parent be4a751943265c0637da859d15a4faf162f5c478
author Matthieu Sarter <matthieu.sarter.external@atos.net> 1490802906 +0200
committer Ian Lance Taylor <iant@golang.org> 1493062766 +0000

math: fix sign for atan/expm1/log1p(-0)

AIX libc returns +0 for atan(-0), expm1(-0) and log1p(-0),
while matching Go functions must return -0.

Code courtesy of Tony Reix.

Issue golang/go#19200

Change-Id: I6fe360369216784a301eeee508f178f4e902ac95
Reviewed-on: https://go-review.googlesource.com/38699
Reviewed-by: Ian Lance Taylor <iant@golang.org>