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/* Test iscanonical and canonicalizel for ldbl-96.
Copyright (C) 2016-2024 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 <float.h>
#include <math.h>
#include <math_ldbl.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
struct test
{
bool sign;
uint16_t exponent;
bool high;
uint64_t mantissa;
bool canonical;
};
#define M68K_VARIANT (LDBL_MIN_EXP == -16382)
static const struct test tests[] =
{
{ false, 0, true, 0, M68K_VARIANT },
{ true, 0, true, 0, M68K_VARIANT },
{ false, 0, true, 1, M68K_VARIANT },
{ true, 0, true, 1, M68K_VARIANT },
{ false, 0, true, 0x100000000ULL, M68K_VARIANT },
{ true, 0, true, 0x100000000ULL, M68K_VARIANT },
{ false, 0, false, 0, true },
{ true, 0, false, 0, true },
{ false, 0, false, 1, true },
{ true, 0, false, 1, true },
{ false, 0, false, 0x100000000ULL, true },
{ true, 0, false, 0x100000000ULL, true },
{ false, 1, true, 0, true },
{ true, 1, true, 0, true },
{ false, 1, true, 1, true },
{ true, 1, true, 1, true },
{ false, 1, true, 0x100000000ULL, true },
{ true, 1, true, 0x100000000ULL, true },
{ false, 1, false, 0, false },
{ true, 1, false, 0, false },
{ false, 1, false, 1, false },
{ true, 1, false, 1, false },
{ false, 1, false, 0x100000000ULL, false },
{ true, 1, false, 0x100000000ULL, false },
{ false, 0x7ffe, true, 0, true },
{ true, 0x7ffe, true, 0, true },
{ false, 0x7ffe, true, 1, true },
{ true, 0x7ffe, true, 1, true },
{ false, 0x7ffe, true, 0x100000000ULL, true },
{ true, 0x7ffe, true, 0x100000000ULL, true },
{ false, 0x7ffe, false, 0, false },
{ true, 0x7ffe, false, 0, false },
{ false, 0x7ffe, false, 1, false },
{ true, 0x7ffe, false, 1, false },
{ false, 0x7ffe, false, 0x100000000ULL, false },
{ true, 0x7ffe, false, 0x100000000ULL, false },
{ false, 0x7fff, true, 0, true },
{ true, 0x7fff, true, 0, true },
{ false, 0x7fff, true, 1, true },
{ true, 0x7fff, true, 1, true },
{ false, 0x7fff, true, 0x100000000ULL, true },
{ true, 0x7fff, true, 0x100000000ULL, true },
{ false, 0x7fff, false, 0, M68K_VARIANT },
{ true, 0x7fff, false, 0, M68K_VARIANT },
{ false, 0x7fff, false, 1, M68K_VARIANT },
{ true, 0x7fff, false, 1, M68K_VARIANT },
{ false, 0x7fff, false, 0x100000000ULL, M68K_VARIANT },
{ true, 0x7fff, false, 0x100000000ULL, M68K_VARIANT },
};
static int
do_test (void)
{
int result = 0;
for (size_t i = 0; i < sizeof (tests) / sizeof (tests[0]); i++)
{
long double ld;
SET_LDOUBLE_WORDS (ld, tests[i].exponent | (tests[i].sign << 15),
(tests[i].mantissa >> 32) | (tests[i].high << 31),
tests[i].mantissa & 0xffffffffULL);
bool canonical = iscanonical (ld);
if (canonical == tests[i].canonical)
{
printf ("PASS: iscanonical test %zu\n", i);
long double ldc = 12345.0L;
bool canonicalize_ret = canonicalizel (&ldc, &ld);
if (canonicalize_ret == !canonical)
{
printf ("PASS: canonicalizel test %zu\n", i);
bool canon_ok;
if (!canonical)
canon_ok = ldc == 12345.0L;
else if (isnan (ld))
canon_ok = isnan (ldc) && !issignaling (ldc);
else
canon_ok = ldc == ld;
if (canon_ok)
printf ("PASS: canonicalized value test %zu\n", i);
else
{
printf ("FAIL: canonicalized value test %zu\n", i);
result = 1;
}
}
else
{
printf ("FAIL: canonicalizel test %zu\n", i);
result = 1;
}
}
else
{
printf ("FAIL: iscanonical test %zu\n", i);
result = 1;
}
}
return result;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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