Fix cproj handling of (finite, NaN) arguments (bug 15531)

[Andreas Jaeger]

On 08/20/2013 07:22 PM, Joseph S. Myers wrote:
> Bug 15531 (extracted from reported LSB test failures) is cproj
> returning an infinity for an argument with one finite and one NaN
> part, when the ISO C specification is that it should return the
> argument unchanged in that case.
> 
> This patch simplifies the code to follow the ISO C specification more
> directly to fix this bug.  Tested x86_64 and x86.
> 
> 2013-08-20  Joseph Myers  <joseph@codesourcery.com>
> 
> 	[BZ #15531]
> 	* math/s_cproj.c (__cproj): Only return an infinity if one part of
> 	argument is infinite.
> 	* math/s_cprojf.c (__cprojf): Likewise.
> 	* math/s_cprojl.c (__cprojl): Likewise.
> 	* sysdeps/ieee754/ldbl-128ibm/s_cprojl.c (__cprojl): Likewise.
> 	* math/libm-test.inc (cproj_test_data): Add more tests.

Looks fine, thanks,

Andreas
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