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Fix i386 atanhl (sNaN) (bug 20219).

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The i386 version of atanhl returns sNaN for sNaN input.  This patch
fixes it to add NaN arguments to themselves so it returns qNaN in this
case.

Tested for x86_64 and x86.

	[BZ #20219]
	* sysdeps/i386/fpu/e_atanhl.S (__ieee754_atanhl): Add NaN argument
	to itself.
	* math/libm-test.inc (atanh_test_data): Add sNaN tests.
This commit is contained in:
Joseph Myers 2016-06-07 23:08:32 +00:00
parent c23805a95d
commit 8fa8a330f9
3 changed files with 8 additions and 0 deletions
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5
ChangeLog
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@ -1,5 +1,10 @@
2016-06-07 Joseph Myers <joseph@codesourcery.com>
[BZ #20219]
* sysdeps/i386/fpu/e_atanhl.S (__ieee754_atanhl): Add NaN argument
to itself.
* math/libm-test.inc (atanh_test_data): Add sNaN tests.
[BZ #20218]
* sysdeps/i386/fpu/s_asinhl.S (__asinhl): Add non-finite argument
to itself.

2
math/libm-test.inc
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@ -1915,6 +1915,8 @@ static const struct test_f_f_data atanh_test_data[] =
TEST_f_f (atanh, -1, minus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_f_f (atanh, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_f (atanh, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_f (atanh, snan_value, qnan_value, INVALID_EXCEPTION),
TEST_f_f (atanh, -snan_value, qnan_value, INVALID_EXCEPTION),
/* atanh (x) == qNaN plus invalid exception if |x| > 1. */
TEST_f_f (atanh, 1.125L, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM),

1
sysdeps/i386/fpu/e_atanhl.S
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@ -121,6 +121,7 @@ ENTRY(__ieee754_atanhl)
cmpl $0, 4(%esp)
je 7b
6: fldt 4(%esp)
fadd %st(0)
ret
END(__ieee754_atanhl)
strong_alias (__ieee754_atanhl, __atanhl_finite)