From af0cfbaf1df1549ca0bc70bd6b4bc54004d11680 Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Mon, 6 Jun 2016 22:10:11 +0000 Subject: Fix dbl-64 acos (sNaN) (bug 20212). The dbl-64 version of acos returns sNaN for sNaN arguments. This patch fixes it to add NaN arguments to themselves so that qNaN is returned in this case. Tested for x86_64 and x86. [BZ #20212] * sysdeps/ieee754/dbl-64/e_asin.c (__ieee754_acos): Add NaN argument to itself. * math/libm-test.inc (acos_test_data): Add sNaN tests. --- math/libm-test.inc | 2 ++ 1 file changed, 2 insertions(+) (limited to 'math') diff --git a/math/libm-test.inc b/math/libm-test.inc index aaa01488ec..698172080c 100644 --- a/math/libm-test.inc +++ b/math/libm-test.inc @@ -1799,6 +1799,8 @@ static const struct test_f_f_data acos_test_data[] = TEST_f_f (acos, minus_infty, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM), TEST_f_f (acos, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), TEST_f_f (acos, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), + TEST_f_f (acos, snan_value, qnan_value, INVALID_EXCEPTION), + TEST_f_f (acos, -snan_value, qnan_value, INVALID_EXCEPTION), /* |x| > 1: */ TEST_f_f (acos, 1.125L, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM), -- cgit v1.2.3