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/* Test ilogb.
Copyright (C) 1997-2025 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_i_data ilogb_test_data[] =
{
TEST_f_i (ilogb, 1, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_i (ilogb, lit_e, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_i (ilogb, 1024, 10, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_i (ilogb, -2000, 10, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_i (ilogb, 0.5, -1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_i (ilogb, -0.5, -1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
#if MANT_DIG >= 57
TEST_f_i (ilogb, 0x1.ffffffffffffffp1L, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_i (ilogb, -0x1.ffffffffffffffp1L, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
#endif
TEST_f_i (ilogb, min_subnorm_value, MIN_EXP-MANT_DIG, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_i (ilogb, -min_subnorm_value, MIN_EXP-MANT_DIG, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_i (ilogb, min_value, MIN_EXP-1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_i (ilogb, -min_value, MIN_EXP-1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_i (ilogb, max_value, MAX_EXP-1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_i (ilogb, -max_value, MAX_EXP-1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
/* ilogb (0.0) == FP_ILOGB0 plus invalid exception */
TEST_f_i (ilogb, 0.0, FP_ILOGB0, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION|ERRNO_EDOM),
TEST_f_i (ilogb, -0.0, FP_ILOGB0, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION|ERRNO_EDOM),
/* ilogb (qNaN) == FP_ILOGBNAN plus invalid exception */
TEST_f_i (ilogb, qnan_value, FP_ILOGBNAN, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION|ERRNO_EDOM),
TEST_f_i (ilogb, -qnan_value, FP_ILOGBNAN, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION|ERRNO_EDOM),
TEST_f_i (ilogb, snan_value, FP_ILOGBNAN, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION|ERRNO_EDOM),
TEST_f_i (ilogb, -snan_value, FP_ILOGBNAN, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION|ERRNO_EDOM),
/* ilogb (inf) == INT_MAX plus invalid exception */
TEST_f_i (ilogb, plus_infty, INT_MAX, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION|ERRNO_EDOM),
/* ilogb (-inf) == INT_MAX plus invalid exception */
TEST_f_i (ilogb, minus_infty, INT_MAX, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION|ERRNO_EDOM),
};
static void
ilogb_test (void)
{
ALL_RM_TEST (ilogb, 1, ilogb_test_data, RUN_TEST_LOOP_f_i, END);
}
static void
do_test (void)
{
ilogb_test ();
}
/*
* Local Variables:
* mode:c
* End:
*/
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