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akhuettel/wip
glibc/math/libm-test-pown.inc
Sachin Monga ce488f7c16 math: xfail some pown and compoundn tests for ibm128-libgcc 
On powerpc math/test-ibm128-pown shows below failures:

testing long double (without inline functions)
infinity has wrong sign.
Failure: Test: pown_downward (-inf, 0x7fffffffffffffffLL)
Result:
 is:          inf   inf
 should be:  -inf  -inf
Failure: Test: pown_downward (-0, 9223372036854775807LL)
Result:
 is:          0.00000000000000000000000000000000e+00   0x0.000000000000000000000000000p+0
 should be:  -0.00000000000000000000000000000000e+00  -0x0.000000000000000000000000000p+0
 difference:  0.00000000000000000000000000000000e+00   0x0.000000000000000000000000000p+0
 ulp       :  0.0000
 max.ulp   :  16.0000
Failure: pown_downward (-0x1p+0, 9223372036854775807LL): Exception "Invalid operation" set
Failure: pown_downward (-0x1p+0, 9223372036854775807LL): errno set to 34, expected 0 (unchanged)
Failure: Test: pown_downward (-0x1p+0, 9223372036854775807LL)
Result:
 is:         qNaN
 should be:  -1.00000000000000000000000000000000e+00  -0x1.000000000000000000000000000p+0
infinity has wrong sign.
Failure: Test: pown_towardzero (-0, -0x7fffffffffffffffLL)
Result:
 is:          inf   inf
 should be:  -inf  -inf
infinity has wrong sign.
Failure: Test: pown_towardzero (-inf, 0x7fffffffffffffffLL)
Result:
 is:          inf   inf
 should be:  -inf  -inf
Failure: Test: pown_towardzero (-inf, -0x7fffffffffffffffLL)
Result:
 is:          0.00000000000000000000000000000000e+00   0x0.000000000000000000000000000p+0
 should be:  -0.00000000000000000000000000000000e+00  -0x0.000000000000000000000000000p+0
 difference:  0.00000000000000000000000000000000e+00   0x0.000000000000000000000000000p+0
 ulp       :  0.0000
 max.ulp   :  16.0000
Failure: Test: pown_towardzero (-0, 9223372036854775807LL)
Result:
 is:          0.00000000000000000000000000000000e+00   0x0.000000000000000000000000000p+0
 should be:  -0.00000000000000000000000000000000e+00  -0x0.000000000000000000000000000p+0
 difference:  0.00000000000000000000000000000000e+00   0x0.000000000000000000000000000p+0
 ulp       :  0.0000
 max.ulp   :  16.0000
Failure: pown_towardzero (-0x1p+0, -9223372036854775807LL): Exception "Invalid operation" set
Failure: pown_towardzero (-0x1p+0, -9223372036854775807LL): errno set to 34, expected 0 (unchanged)
Failure: Test: pown_towardzero (-0x1p+0, -9223372036854775807LL)
Result:
 is:         qNaN
 should be:  -1.00000000000000000000000000000000e+00  -0x1.000000000000000000000000000p+0
Failure: pown_towardzero (-0x1p+0, 9223372036854775807LL): Exception "Invalid operation" set
Failure: pown_towardzero (-0x1p+0, 9223372036854775807LL): errno set to 34, expected 0 (unchanged)
Failure: Test: pown_towardzero (-0x1p+0, 9223372036854775807LL)
Result:
 is:         qNaN
 should be:  -1.00000000000000000000000000000000e+00  -0x1.000000000000000000000000000p+0
infinity has wrong sign.
Failure: Test: pown_upward (-0, -0x7fffffffffffffffLL)
Result:
 is:          inf   inf
 should be:  -inf  -inf
Failure: Test: pown_upward (-inf, -0x7fffffffffffffffLL)
Result:
 is:          0.00000000000000000000000000000000e+00   0x0.000000000000000000000000000p+0
 should be:  -0.00000000000000000000000000000000e+00  -0x0.000000000000000000000000000p+0
 difference:  0.00000000000000000000000000000000e+00   0x0.000000000000000000000000000p+0
 ulp       :  0.0000
 max.ulp   :  16.0000
Failure: pown_upward (-0x1p+0, -9223372036854775807LL): Exception "Invalid operation" set
Failure: pown_upward (-0x1p+0, -9223372036854775807LL): errno set to 34, expected 0 (unchanged)
Failure: Test: pown_upward (-0x1p+0, -9223372036854775807LL)
Result:
 is:         qNaN
 should be:  -1.00000000000000000000000000000000e+00  -0x1.000000000000000000000000000p+0

Likewise, math/test-ibm128-compoundn shows below failure:

testing long double (without inline functions)
Failure: compoundn_upward (0xf.ffffffffffff8p+1020, 1LL): Exception "Overflow" set
Failure: compoundn_upward (0xf.ffffffffffff8p+1020, 1LL): errno set to 34, expected 0 (unchanged)
Failure: Test: compoundn_upward (0xf.ffffffffffff8p+1020, 1LL)
Result:
 is:          inf   inf
 should be:   1.79769313486231570814527423731707e+308   0x1.fffffffffffff00000000000008p+1023

Signed-off-by: Sachin Monga <smonga@linux.ibm.com>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2025-07-24 19:36:21 +02:00

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/* Test pown.
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_fL_f_data pown_test_data[] =
{
TEST_fL_f (pown, qnan_value, 0, 1, ERRNO_UNCHANGED|NO_TEST_MATHVEC),
TEST_fL_f (pown, -qnan_value, 0, 1, ERRNO_UNCHANGED|NO_TEST_MATHVEC),
TEST_fL_f (pown, snan_value, 0, qnan_value, INVALID_EXCEPTION|NO_TEST_MATHVEC),
TEST_fL_f (pown, -snan_value, 0, qnan_value, INVALID_EXCEPTION|NO_TEST_MATHVEC),
TEST_fL_f (pown, plus_infty, 1, plus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, plus_infty, -1, 0, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, 1, minus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, 11, minus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, 1001, minus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, 2, plus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, 12, plus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, 1002, plus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -1, minus_zero, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -11, minus_zero, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -1001, minus_zero, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -2, 0, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -12, 0, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -1002, 0, ERRNO_UNCHANGED),
TEST_fL_f (pown, qnan_value, 1, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fL_f (pown, -qnan_value, 1, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fL_f (pown, snan_value, 1, qnan_value, INVALID_EXCEPTION),
TEST_fL_f (pown, -snan_value, 1, qnan_value, INVALID_EXCEPTION),
TEST_fL_f (pown, qnan_value, -1, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fL_f (pown, -qnan_value, -1, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fL_f (pown, snan_value, -1, qnan_value, INVALID_EXCEPTION),
TEST_fL_f (pown, -snan_value, -1, qnan_value, INVALID_EXCEPTION),
TEST_fL_f (pown, qnan_value, 3, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fL_f (pown, -qnan_value, 3, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fL_f (pown, qnan_value, -3, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fL_f (pown, -qnan_value, -3, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_fL_f (pown, snan_value, 3, qnan_value, INVALID_EXCEPTION),
TEST_fL_f (pown, -snan_value, 3, qnan_value, INVALID_EXCEPTION),
TEST_fL_f (pown, snan_value, -3, qnan_value, INVALID_EXCEPTION),
TEST_fL_f (pown, -snan_value, -3, qnan_value, INVALID_EXCEPTION),
/* pown (x, 0) == 1. */
TEST_fL_f (pown, plus_infty, 0, 1, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, 0, 1, ERRNO_UNCHANGED),
TEST_fL_f (pown, 0, -1, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, 0, -11, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, 0, -0xfffffe, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, 0, -0xffffff, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, 0, -0x1ffffffffffffeLL, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, 0, -0x1fffffffffffffLL, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, 0, -0x7ffffffffffffffeLL, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, 0, -0x7fffffffffffffffLL, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, minus_zero, -1, minus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, minus_zero, -11L, minus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, minus_zero, -0xfffffe, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, minus_zero, -0xffffff, minus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, minus_zero, -0x1fffffe, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, minus_zero, -0x1ffffffffffffeLL, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, minus_zero, -0x1fffffffffffffLL, minus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, minus_zero, -0x3ffffffffffffeLL, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, minus_zero, -0x7ffffffffffffffeLL, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, minus_zero, -0x7fffffffffffffffLL, minus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE|XFAIL_ROUNDING_IBM128_LIBGCC),
TEST_fL_f (pown, 0, -2, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, 0, -0x1000000, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, minus_zero, -2, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
TEST_fL_f (pown, minus_zero, -0x1000000, plus_infty, DIVIDE_BY_ZERO_EXCEPTION|ERRNO_ERANGE),
/* pown (+inf, y) == +inf for y > 0. */
TEST_fL_f (pown, plus_infty, 2, plus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, plus_infty, 0xffffff, plus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, plus_infty, 0x1fffffffffffffLL, plus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, plus_infty, 0x7fffffffffffffffLL, plus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, plus_infty, 0x1000000, plus_infty, ERRNO_UNCHANGED),
/* pown (+inf, y) == +0 for y < 0. */
TEST_fL_f (pown, plus_infty, -1, 0.0, ERRNO_UNCHANGED),
TEST_fL_f (pown, plus_infty, -0xffffff, 0.0, ERRNO_UNCHANGED),
TEST_fL_f (pown, plus_infty, -0x1fffffffffffffLL, 0.0, ERRNO_UNCHANGED),
TEST_fL_f (pown, plus_infty, -0x7fffffffffffffffLL, 0.0, ERRNO_UNCHANGED),
TEST_fL_f (pown, plus_infty, -0x1000000, 0.0, ERRNO_UNCHANGED),
/* pown (-inf, y) == -inf for y an odd integer > 0. */
TEST_fL_f (pown, minus_infty, 27, minus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, 0xffffff, minus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, 0x1fffffe, plus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, 0x1fffffffffffffLL, minus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, 0x3ffffffffffffeL, plus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, 0x7ffffffffffffffeLL, plus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, 0x7fffffffffffffffLL, minus_infty, ERRNO_UNCHANGED|XFAIL_ROUNDING_IBM128_LIBGCC),
/* pown (-inf, y) == +inf for y > 0 and not an odd integer. */
TEST_fL_f (pown, minus_infty, 28, plus_infty, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, 0x1000000, plus_infty, ERRNO_UNCHANGED),
/* pown (-inf, y) == -0 for y an odd integer < 0. */
TEST_fL_f (pown, minus_infty, -3, minus_zero, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -0xfffffe, plus_zero, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -0xffffff, minus_zero, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -0x1fffffe, plus_zero, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -0x1ffffffffffffeLL, plus_zero, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -0x1fffffffffffffLL, minus_zero, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -0x3ffffffffffffeLL, plus_zero, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -0x7ffffffffffffffeLL, plus_zero, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -0x7fffffffffffffffLL, minus_zero, ERRNO_UNCHANGED|XFAIL_ROUNDING_IBM128_LIBGCC),
/* pown (-inf, y) == +0 for y < 0 and not an odd integer. */
TEST_fL_f (pown, minus_infty, -2, 0.0, ERRNO_UNCHANGED),
TEST_fL_f (pown, minus_infty, -0x1000000, 0.0, ERRNO_UNCHANGED),
AUTO_TESTS_fL_f (pown),
};
static void
pown_test (void)
{
ALL_RM_TEST (pown, 0, pown_test_data, RUN_TEST_LOOP_fL_f, END);
}
static void
do_test (void)
{
pown_test ();
}
/*
* Local Variables:
* mode:c
* End:
*/
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