From f00faa4a43706d85ad8d4d2c970d3f52f0f63bfb Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Thu, 9 Jun 2016 18:04:30 +0000 Subject: Fix i386/x86_64 log2l (sNaN) (bug 20235). The i386/x86_64 versions of log2l return sNaN for sNaN input. This patch fixes them to add NaN inputs to themselves so that qNaN is returned in this case. Tested for x86_64 and x86. [BZ #20235] * sysdeps/i386/fpu/e_log2l.S (__ieee754_log2l): Add NaN input to itself. * sysdeps/x86_64/fpu/e_log2l.S (__ieee754_log2l): Likewise. * math/libm-test.inc (log2_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 4371c4ca7b..2df6f29a34 100644 --- a/math/libm-test.inc +++ b/math/libm-test.inc @@ -9076,6 +9076,8 @@ static const struct test_f_f_data log2_test_data[] = TEST_f_f (log2, plus_infty, plus_infty, ERRNO_UNCHANGED), TEST_f_f (log2, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), TEST_f_f (log2, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), + TEST_f_f (log2, snan_value, qnan_value, INVALID_EXCEPTION), + TEST_f_f (log2, -snan_value, qnan_value, INVALID_EXCEPTION), AUTO_TESTS_f_f (log2), }; -- cgit v1.2.3