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authorJoseph Myers <joseph@codesourcery.com>2015-09-17 21:21:39 +0000
committerJoseph Myers <joseph@codesourcery.com>2015-09-17 21:21:39 +0000
commit61f893789862db1dfdf188f77cd215bab0814d2c (patch)
tree9fd0f9b8395f451e24f8ce1c12253847740f8e31 /NEWS
parentb8682397ab2db1aed7f25d0a0c7c81134a97c8c7 (diff)
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Fix sign of zero part from ctan / ctanh when argument infinite (bug 17118).
C99/C11 Annex G specifies the sign of the zero part of the result of
ctan (x +/- i * Inf) and ctanh (+/-Inf + i * y).  This patch fixes glibc
to follow that specification, along the lines I described in my review
of Andreas's previous patch for this issue
<https://sourceware.org/ml/libc-alpha/2014-08/msg00142.html>.

Tested for x86_64.

2015-09-17  Joseph Myers  <joseph@codesourcery.com>
	    Andreas Schwab  <schwab@suse.de>

	[BZ #17118]
	* math/s_ctan.c (__ctan): Determine sign of zero real part of
	result when imaginary part of argument is infinite using sine and
	cosine.
	* math/s_ctanf.c (__ctanf): Likewise.
	* math/s_ctanl.c (__ctanl): Likewise.
	* math/s_ctanh.c (__ctanh): Determine sign of zero imaginary part
	of result when real part of argument is infinite using sine and
	cosine.
	* math/s_ctanhf.c (__ctanhf): Likewise.
	* math/s_ctanhl.c (__ctanhl): Likewise.
	* math/libm-test.inc (ctan_test_data): Add more tests of ctan.
	(ctanh_test_data): Add more tests of ctanh.
Diffstat (limited to 'NEWS')
-rw-r--r--NEWS10
1 files changed, 5 insertions, 5 deletions
diff --git a/NEWS b/NEWS
index 46ad3fa128..d9787014c4 100644
--- a/NEWS
+++ b/NEWS
@@ -11,11 +11,11 @@ Version 2.23
 
   2542, 2543, 2558, 2898, 4404, 6803, 14341, 14912, 15384, 15786, 15918,
   16141, 16296, 16415, 16517, 16519, 16520, 16521, 16734, 16973, 16985,
-  17243, 17244, 17787, 17905, 18084, 18086, 18240, 18265, 18370, 18421,
-  18480, 18525, 18595, 18610, 18618, 18647, 18661, 18674, 18675, 18681,
-  18757, 18778, 18781, 18787, 18789, 18790, 18795, 18796, 18820, 18823,
-  18824, 18857, 18863, 18870, 18872, 18873, 18875, 18887, 18921, 18951,
-  18952, 18961, 18966, 18967, 18977.
+  17118, 17243, 17244, 17787, 17905, 18084, 18086, 18240, 18265, 18370,
+  18421, 18480, 18525, 18595, 18610, 18618, 18647, 18661, 18674, 18675,
+  18681, 18757, 18778, 18781, 18787, 18789, 18790, 18795, 18796, 18820,
+  18823, 18824, 18857, 18863, 18870, 18872, 18873, 18875, 18887, 18921,
+  18951, 18952, 18961, 18966, 18967, 18977.
 
 * The obsolete header <regexp.h> has been removed.  Programs that require
   this header must be updated to use <regex.h> instead.