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authorJoseph Myers <joseph@codesourcery.com>2013-04-30 11:27:35 +0000
committerJoseph Myers <joseph@codesourcery.com>2013-04-30 11:27:35 +0000
commitcaf84319c1614d8aa867d8db80219f4e9b1bf735 (patch)
tree08263d4ddcdf643fc258daeb43718821a2e2fbde /ChangeLog
parent6dbe713d85fecc1bee99713d745413106af200b7 (diff)
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Fix catan, catanh inaccuracy from atan2 denominators near 0 (bug 15416).
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+2013-04-30  Joseph Myers  <joseph@codesourcery.com>
+
+	[BZ #15416]
+	* math/s_catan.c (__catan): Compute expressions 1 - x^2 - y^2 more
+	accurately for denominator in atan2.
+	* math/s_catanf.c (__catanf): Likewise.
+	* math/s_catanh.c (__catanh): Likewise.
+	* math/s_catanhf.c (__catanhf): Likewise.
+	* math/s_catanhl.c (__catanhl): Likewise.
+	* math/s_catanl.c (__catanl): Likewise.
+	* math/libm-test.inc (catan_test): Add more tests.
+	(catanh_test): Likewise.
+	* sysdeps/i386/fpu/libm-test-ulps: Update.
+	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
+
 2013-04-30  Siddhesh Poyarekar  <siddhesh@redhat.com>
 
 	* sysdeps/ieee754/dbl-64/s_sin.c: Format code.