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glibc/math/libm-test-fma.inc
Joseph Myers ca121b117f Fix ldbl-96 fma (Inf, Inf, finite) (bug 23272). 
As reported in bug 23272, the ldbl-96 implementation of fma (fma for
double, in terms of ldbl-96 as the internal arithmetic type, as used
on 32-bit x86) is missing some of the special-case handling for
non-finite arguments, resulting in incorrect NaN results when the
first two arguments are infinities, the third is finite and so the
infinities go through the logic for finite arguments.  This patch
fixes it by handling all cases of non-finite arguments up front, with
additional fma tests for the problem cases being added to the
testsuite.

Tested for x86_64 and x86.

	[BZ ]
	* sysdeps/ieee754/ldbl-96/s_fma.c (__fma): Start by handling all
	cases of non-finite arguments.
	* math/libm-test-fma.inc (fma_test_data): Add more tests.
2018-06-11 16:33:42 +00:00

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/* Test fma.
Copyright (C) 1997-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include "libm-test-driver.c"
static const struct test_fff_f_data fma_test_data[] =
{
TEST_fff_f (fma, qnan_value, 2.0, 3.0, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, -qnan_value, 2.0, 3.0, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, snan_value, 2.0, 3.0, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, -snan_value, 2.0, 3.0, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, 1.0, qnan_value, 3.0, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, 1.0, -qnan_value, 3.0, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, 1.0, snan_value, 3.0, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, 1.0, -snan_value, 3.0, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, 1.0, 2.0, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, 1.0, 2.0, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, 1.0, 2.0, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, 1.0, 2.0, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, max_value, max_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, max_value, max_value, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, min_value, min_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, min_value, min_value, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, min_subnorm_value, min_subnorm_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, min_subnorm_value, min_subnorm_value, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, max_value, max_value, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, max_value, max_value, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, min_value, min_value, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, min_value, min_value, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, min_subnorm_value, min_subnorm_value, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, min_subnorm_value, min_subnorm_value, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, qnan_value, qnan_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, qnan_value, qnan_value, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, qnan_value, -qnan_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, qnan_value, -qnan_value, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, -qnan_value, qnan_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, -qnan_value, qnan_value, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, -qnan_value, -qnan_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, -qnan_value, -qnan_value, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, snan_value, qnan_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, qnan_value, snan_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, qnan_value, qnan_value, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, snan_value, snan_value, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, 1.0, qnan_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, 1.0, qnan_value, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, 1.0, -qnan_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, 1.0, -qnan_value, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, 1.0, snan_value, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, qnan_value, 2.0, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, qnan_value, 2.0, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, -qnan_value, 2.0, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, -qnan_value, 2.0, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, snan_value, 2.0, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, qnan_value, qnan_value, 3.0, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, qnan_value, -qnan_value, 3.0, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, -qnan_value, qnan_value, 3.0, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, -qnan_value, -qnan_value, 3.0, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, snan_value, snan_value, 3.0, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, plus_infty, 0.0, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION_OK),
TEST_fff_f (fma, plus_infty, 0.0, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION_OK),
TEST_fff_f (fma, minus_infty, 0.0, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION_OK),
TEST_fff_f (fma, minus_infty, 0.0, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION_OK),
TEST_fff_f (fma, plus_infty, 0.0, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, plus_infty, 0.0, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, minus_infty, 0.0, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, minus_infty, 0.0, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, 0.0, plus_infty, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION_OK),
TEST_fff_f (fma, 0.0, plus_infty, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION_OK),
TEST_fff_f (fma, 0.0, minus_infty, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION_OK),
TEST_fff_f (fma, 0.0, minus_infty, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION_OK),
TEST_fff_f (fma, 0.0, plus_infty, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, 0.0, plus_infty, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, 0.0, minus_infty, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, 0.0, minus_infty, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
/* Bug 6801: errno setting may be missing. */
TEST_fff_f (fma, plus_infty, 0.0, 1.0, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, minus_infty, 0.0, 1.0, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, 0.0, plus_infty, 1.0, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, 0.0, minus_infty, 1.0, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, plus_infty, plus_infty, minus_infty, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, minus_infty, plus_infty, plus_infty, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, plus_infty, minus_infty, plus_infty, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, minus_infty, minus_infty, minus_infty, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, plus_infty, 3.5L, minus_infty, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, minus_infty, -7.5L, minus_infty, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, -13.5L, plus_infty, plus_infty, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, minus_infty, 7.5L, plus_infty, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_fff_f (fma, -max_value, -max_value, minus_infty, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED|XFAIL_ROUNDING_IBM128_LIBGCC),
TEST_fff_f (fma, max_value / 2, max_value / 2, minus_infty, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, -max_value, max_value, plus_infty, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED|XFAIL_ROUNDING_IBM128_LIBGCC),
TEST_fff_f (fma, max_value / 2, -max_value / 4, plus_infty, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, 4, plus_infty, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, 2, minus_infty, minus_infty, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, plus_infty, plus_infty, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, minus_infty, plus_infty, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, minus_infty, minus_infty, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, plus_infty, minus_infty, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, plus_infty, plus_zero, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, plus_infty, minus_zero, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, plus_infty, min_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, plus_infty, -min_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, plus_infty, min_subnorm_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, plus_infty, -min_subnorm_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, plus_infty, max_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, plus_infty, -max_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, minus_infty, plus_zero, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, minus_infty, minus_zero, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, minus_infty, min_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, minus_infty, -min_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, minus_infty, min_subnorm_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, minus_infty, -min_subnorm_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, minus_infty, max_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, plus_infty, minus_infty, -max_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, plus_infty, plus_zero, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, plus_infty, minus_zero, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, plus_infty, min_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, plus_infty, -min_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, plus_infty, min_subnorm_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, plus_infty, -min_subnorm_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, plus_infty, max_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, plus_infty, -max_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, minus_infty, plus_zero, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, minus_infty, minus_zero, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, minus_infty, min_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, minus_infty, -min_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, minus_infty, min_subnorm_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, minus_infty, -min_subnorm_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, minus_infty, max_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fff_f (fma, minus_infty, minus_infty, -max_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
AUTO_TESTS_fff_f (fma),
};
static void
fma_test (void)
{
ALL_RM_TEST (fma, 1, fma_test_data, RUN_TEST_LOOP_fff_f, END);
}
static void
do_test (void)
{
fma_test ();
}
/*
* Local Variables:
* mode:c
* End:
*/
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