about summary refs log tree commit diff
path: root/math/libm-test-ctanh.inc
diff options
context:
space:
mode:
authorJoseph Myers <joseph@codesourcery.com>2017-12-07 16:21:00 +0000
committerJoseph Myers <joseph@codesourcery.com>2017-12-07 16:21:00 +0000
commitd15e83c5f5231d971472b5ffc9219d54056ca0f1 (patch)
treebbc07214991185682fd6fe1dada1907e3fe6608b /math/libm-test-ctanh.inc
parentd89756ebe1905c1989179c2f1c2b10ef2fb3354e (diff)
downloadglibc-d15e83c5f5231d971472b5ffc9219d54056ca0f1.tar.gz
glibc-d15e83c5f5231d971472b5ffc9219d54056ca0f1.tar.xz
glibc-d15e83c5f5231d971472b5ffc9219d54056ca0f1.zip
Fix ctanh (0 + i NaN), ctanh (0 + i Inf) (bug 22568, DR#471).
As per C11 DR#471, ctanh (0 + i NaN) and ctanh (0 + i Inf) should
return 0 + i NaN (with "invalid" exception in the second case but not
the first), not NaN + i NaN.  This has corresponding implications for
ctan since its special cases are defined by ctan (z) = -i ctanh (iz).
This patch implements these cases for ctanh and ctan, updating
tests accordingly.

Tested for x86_64.

	[BZ #22568]
	* math/s_ctan_template.c (M_DECL_FUNC (__ctan)): Set imaginary
	part of result to imaginary part of argument if it is zero and the
	real part of the argument is not finite.
	* math/s_ctanh_template.c (M_DECL_FUNC (__ctanh)): Set real part
	of result to real part of argument if it is zero and the imaginary
	part of the argument is not finite.
Diffstat (limited to 'math/libm-test-ctanh.inc')
-rw-r--r--math/libm-test-ctanh.inc12
1 files changed, 6 insertions, 6 deletions
diff --git a/math/libm-test-ctanh.inc b/math/libm-test-ctanh.inc
index 6ddeb0d361..8a8148248a 100644
--- a/math/libm-test-ctanh.inc
+++ b/math/libm-test-ctanh.inc
@@ -89,13 +89,13 @@ static const struct test_c_c_data ctanh_test_data[] =
     TEST_c_c (ctanh, minus_infty, -0x1.2p16383L, -1.0, 0.0),
 #endif
 
-    TEST_c_c (ctanh, 0, plus_infty, qnan_value, qnan_value, INVALID_EXCEPTION),
+    TEST_c_c (ctanh, 0, plus_infty, 0, qnan_value, INVALID_EXCEPTION),
     TEST_c_c (ctanh, 2, plus_infty, qnan_value, qnan_value, INVALID_EXCEPTION),
-    TEST_c_c (ctanh, 0, minus_infty, qnan_value, qnan_value, INVALID_EXCEPTION),
+    TEST_c_c (ctanh, 0, minus_infty, 0, qnan_value, INVALID_EXCEPTION),
     TEST_c_c (ctanh, 2, minus_infty, qnan_value, qnan_value, INVALID_EXCEPTION),
-    TEST_c_c (ctanh, minus_zero, plus_infty, qnan_value, qnan_value, INVALID_EXCEPTION),
+    TEST_c_c (ctanh, minus_zero, plus_infty, minus_zero, qnan_value, INVALID_EXCEPTION),
     TEST_c_c (ctanh, -2, plus_infty, qnan_value, qnan_value, INVALID_EXCEPTION),
-    TEST_c_c (ctanh, minus_zero, minus_infty, qnan_value, qnan_value, INVALID_EXCEPTION),
+    TEST_c_c (ctanh, minus_zero, minus_infty, minus_zero, qnan_value, INVALID_EXCEPTION),
     TEST_c_c (ctanh, -2, minus_infty, qnan_value, qnan_value, INVALID_EXCEPTION),
 
     TEST_c_c (ctanh, plus_infty, qnan_value, 1.0, 0.0, IGNORE_ZERO_INF_SIGN),
@@ -111,9 +111,9 @@ static const struct test_c_c_data ctanh_test_data[] =
     TEST_c_c (ctanh, qnan_value, 0.5, qnan_value, qnan_value, INVALID_EXCEPTION_OK),
     TEST_c_c (ctanh, qnan_value, -4.5, qnan_value, qnan_value, INVALID_EXCEPTION_OK),
 
-    TEST_c_c (ctanh, 0, qnan_value, qnan_value, qnan_value, INVALID_EXCEPTION_OK),
+    TEST_c_c (ctanh, 0, qnan_value, 0, qnan_value),
     TEST_c_c (ctanh, 5, qnan_value, qnan_value, qnan_value, INVALID_EXCEPTION_OK),
-    TEST_c_c (ctanh, minus_zero, qnan_value, qnan_value, qnan_value, INVALID_EXCEPTION_OK),
+    TEST_c_c (ctanh, minus_zero, qnan_value, minus_zero, qnan_value),
     TEST_c_c (ctanh, -0.25, qnan_value, qnan_value, qnan_value, INVALID_EXCEPTION_OK),
 
     TEST_c_c (ctanh, qnan_value, qnan_value, qnan_value, qnan_value),