mirror of
https://sourceware.org/git/glibc.git
synced 2024-09-19 16:10:01 +00:00
79c52daf47
C23 adds various <math.h> function families originally defined in TS 18661-4. Add the log2p1 functions (log2(1+x): like log1p, but for base-2 logarithms). This illustrates the intended structure of implementations of all these function families: define them initially with a type-generic template implementation. If someone wishes to add type-specific implementations, it is likely such implementations can be both faster and more accurate than the type-generic one and can then override it for types for which they are implemented (adding benchmarks would be desirable in such cases to demonstrate that a new implementation is indeed faster). The test inputs are copied from those for log1p. Note that these changes make gen-auto-libm-tests depend on MPFR 4.2 (or later). The bulk of the changes are fairly generic for any such new function. (sysdeps/powerpc/nofpu/Makefile only needs changing for those type-generic templates that use fabs.) Tested for x86_64 and x86, and with build-many-glibcs.py.
54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
/* Test log2p1.
|
|
Copyright (C) 2024 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include "libm-test-driver.c"
|
|
|
|
static const struct test_f_f_data log2p1_test_data[] =
|
|
{
|
|
TEST_f_f (log2p1, -1, minus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
|
|
TEST_f_f (log2p1, -2, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM),
|
|
TEST_f_f (log2p1, -max_value, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM|XFAIL_ROUNDING_IBM128_LIBGCC),
|
|
TEST_f_f (log2p1, minus_infty, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM),
|
|
|
|
TEST_f_f (log2p1, plus_infty, plus_infty, ERRNO_UNCHANGED),
|
|
TEST_f_f (log2p1, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
|
TEST_f_f (log2p1, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
|
TEST_f_f (log2p1, snan_value, qnan_value, INVALID_EXCEPTION),
|
|
TEST_f_f (log2p1, -snan_value, qnan_value, INVALID_EXCEPTION),
|
|
|
|
AUTO_TESTS_f_f (log2p1),
|
|
};
|
|
|
|
static void
|
|
log2p1_test (void)
|
|
{
|
|
ALL_RM_TEST (log2p1, 0, log2p1_test_data, RUN_TEST_LOOP_f_f, END);
|
|
}
|
|
|
|
static void
|
|
do_test (void)
|
|
{
|
|
log2p1_test ();
|
|
}
|
|
|
|
/*
|
|
* Local Variables:
|
|
* mode:c
|
|
* End:
|
|
*/
|