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authorJoseph Myers <joseph@codesourcery.com>2015-09-15 17:46:08 +0000
committerJoseph Myers <joseph@codesourcery.com>2015-09-15 17:46:08 +0000
commit0b87419b690d1711697ed95808527400910ff997 (patch)
tree95c2f39d1c562fc25437dfb20faefbb097e094ef /ChangeLog
parent694aabefd2eb3a0e2c5624d7feb1d7310b2bdd8b (diff)
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Fix ctan, ctanh missing underflows (bug 18595).
Similar to various other bugs in this area, ctan and ctanh can fail to
raise the underflow exception for some cases of results that are tiny
and inexact.  This patch forces the exception in a similar way to
previous fixes.

Tested for x86_64 and x86.

	[BZ #18595]
	* math/s_ctan.c (__ctan): Force underflow exception for results
	whose real or imaginary part has small absolute value.
	* math/s_ctanf.c (__ctanf): Likewise.
	* math/s_ctanh.c (__ctanh): Likewise.
	* math/s_ctanhf.c (__ctanhf): Likewise.
	* math/s_ctanhl.c (__ctanhl): Likewise.
	* math/s_ctanl.c (__ctanl): Likewise.
	* math/auto-libm-test-in: Do not allow missing underflow for ctan
	and ctanh.  Add more tests of ctan and ctanh.
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 2015-09-15  Joseph Myers  <joseph@codesourcery.com>
 
+	[BZ #18595]
+	* math/s_ctan.c (__ctan): Force underflow exception for results
+	whose real or imaginary part has small absolute value.
+	* math/s_ctanf.c (__ctanf): Likewise.
+	* math/s_ctanh.c (__ctanh): Likewise.
+	* math/s_ctanhf.c (__ctanhf): Likewise.
+	* math/s_ctanhl.c (__ctanhl): Likewise.
+	* math/s_ctanl.c (__ctanl): Likewise.
+	* math/auto-libm-test-in: Do not allow missing underflow for ctan
+	and ctanh.  Add more tests of ctan and ctanh.
+
 	[BZ #15918]
 	* sysdeps/ieee754/flt-32/e_hypotf.c (__ieee754_hypotf): Simplify
 	handling of cases where one argument is an infinity.