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authorJoseph Myers <joseph@codesourcery.com>2016-06-06 22:10:11 +0000
committerJoseph Myers <joseph@codesourcery.com>2016-06-06 22:10:11 +0000
commitaf0cfbaf1df1549ca0bc70bd6b4bc54004d11680 (patch)
tree098497c0884048b37effc5a287a1a5786c5dd752 /nptl
parentc24480ce3b5fed848243fc9642932ef2fa670109 (diff)
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Fix dbl-64 acos (sNaN) (bug 20212).
The dbl-64 version of acos returns sNaN for sNaN arguments.  This
patch fixes it to add NaN arguments to themselves so that qNaN is
returned in this case.

Tested for x86_64 and x86.

	[BZ #20212]
	* sysdeps/ieee754/dbl-64/e_asin.c (__ieee754_acos): Add NaN
	argument to itself.
	* math/libm-test.inc (acos_test_data): Add sNaN tests.
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