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/* Test for correct rounding of results of strtod and related
functions.
Copyright (C) 2012-2016 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/>. */
/* Defining _LIBC_TEST ensures long double math functions are
declared in the headers. */
#define _LIBC_TEST 1
#include <fenv.h>
#include <float.h>
#include <math.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math-tests.h>
struct exactness
{
bool f;
bool d;
bool ld;
};
struct test_results {
float f;
double d;
long double ld;
};
struct test {
const char *s;
struct exactness exact;
struct test_results rd, rn, rz, ru;
};
#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
# define TEST(s, fexact, fd, fn, fz, fu, dexact, dd, dn, dz, du, \
ld53exact, ld53d, ld53n, ld53z, ld53u, \
ld64iexact, ld64id, ld64in, ld64iz, ld64iu, \
ld64mexact, ld64md, ld64mn, ld64mz, ld64mu, \
ld106exact, ld106d, ld106n, ld106z, ld106u, \
ld113exact, ld113d, ld113n, ld113z, ld113u) \
{ \
s, \
{ fexact, dexact, ld53exact }, \
{ fd, dd, ld53d }, \
{ fn, dn, ld53n }, \
{ fz, dz, ld53z }, \
{ fu, du, ld53u } \
}
#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && LDBL_MIN_EXP == -16381
/* This is for the Intel extended float format. */
# define TEST(s, fexact, fd, fn, fz, fu, dexact, dd, dn, dz, du, \
ld53exact, ld53d, ld53n, ld53z, ld53u, \
ld64iexact, ld64id, ld64in, ld64iz, ld64iu, \
ld64mexact, ld64md, ld64mn, ld64mz, ld64mu, \
ld106exact, ld106d, ld106n, ld106z, ld106u, \
ld113exact, ld113d, ld113n, ld113z, ld113u) \
{ \
s, \
{ fexact, dexact, ld64iexact }, \
{ fd, dd, ld64id }, \
{ fn, dn, ld64in }, \
{ fz, dz, ld64iz }, \
{ fu, du, ld64iu } \
}
#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && LDBL_MIN_EXP == -16382
/* This is for the Motorola extended float format. */
# define TEST(s, fexact, fd, fn, fz, fu, dexact, dd, dn, dz, du, \
ld53exact, ld53d, ld53n, ld53z, ld53u, \
ld64iexact, ld64id, ld64in, ld64iz, ld64iu, \
ld64mexact, ld64md, ld64mn, ld64mz, ld64mu, \
ld106exact, ld106d, ld106n, ld106z, ld106u, \
ld113exact, ld113d, ld113n, ld113z, ld113u) \
{ \
s, \
{ fexact, dexact, ld64mexact }, \
{ fd, dd, ld64md }, \
{ fn, dn, ld64mn }, \
{ fz, dz, ld64mz }, \
{ fu, du, ld64mu } \
}
#elif LDBL_MANT_DIG == 106 && LDBL_MAX_EXP == 1024
# define TEST(s, fexact, fd, fn, fz, fu, dexact, dd, dn, dz, du, \
ld53exact, ld53d, ld53n, ld53z, ld53u, \
ld64iexact, ld64id, ld64in, ld64iz, ld64iu, \
ld64mexact, ld64md, ld64mn, ld64mz, ld64mu, \
ld106exact, ld106d, ld106n, ld106z, ld106u, \
ld113exact, ld113d, ld113n, ld113z, ld113u) \
{ \
s, \
{ fexact, dexact, ld106exact }, \
{ fd, dd, ld106d }, \
{ fn, dn, ld106n }, \
{ fz, dz, ld106z }, \
{ fu, du, ld106u } \
}
#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
# define TEST(s, fexact, fd, fn, fz, fu, dexact, dd, dn, dz, du, \
ld53exact, ld53d, ld53n, ld53z, ld53u, \
ld64iexact, ld64id, ld64in, ld64iz, ld64iu, \
ld64mexact, ld64md, ld64mn, ld64mz, ld64mu, \
ld106exact, ld106d, ld106n, ld106z, ld106u, \
ld113exact, ld113d, ld113n, ld113z, ld113u) \
{ \
s, \
{ fexact, dexact, ld113exact }, \
{ fd, dd, ld113d }, \
{ fn, dn, ld113n }, \
{ fz, dz, ld113z }, \
{ fu, du, ld113u } \
}
#else
# error "unknown long double format"
#endif
/* Include the generated test data. */
#include "tst-strtod-round-data.h"
static int
test_in_one_mode (const char *s, const struct test_results *expected,
const struct exactness *exact, const char *mode_name,
bool float_round_ok, bool double_round_ok,
bool long_double_round_ok)
{
int result = 0;
float f = strtof (s, NULL);
double d = strtod (s, NULL);
long double ld = strtold (s, NULL);
if (f != expected->f
|| copysignf (1.0f, f) != copysignf (1.0f, expected->f))
{
printf ("strtof (%s) returned %a not %a (%s)\n", s, f,
expected->f, mode_name);
if (float_round_ok || exact->f)
result = 1;
else
printf ("ignoring this inexact result\n");
}
if (d != expected->d
|| copysign (1.0, d) != copysign (1.0, expected->d))
{
printf ("strtod (%s) returned %a not %a (%s)\n", s, d,
expected->d, mode_name);
if (double_round_ok || exact->d)
result = 1;
else
printf ("ignoring this inexact result\n");
}
if (ld != expected->ld
|| copysignl (1.0L, ld) != copysignl (1.0L, expected->ld))
{
printf ("strtold (%s) returned %La not %La (%s)\n", s, ld,
expected->ld, mode_name);
if ((long_double_round_ok && LDBL_MANT_DIG != 106) || exact->ld)
result = 1;
else
printf ("ignoring this inexact result\n");
}
return result;
}
static int
do_test (void)
{
int save_round_mode __attribute__ ((unused)) = fegetround ();
int result = 0;
for (size_t i = 0; i < sizeof (tests) / sizeof (tests[0]); i++)
{
result |= test_in_one_mode (tests[i].s, &tests[i].rn, &tests[i].exact,
"default rounding mode",
true, true, true);
#ifdef FE_DOWNWARD
if (!fesetround (FE_DOWNWARD))
{
result |= test_in_one_mode (tests[i].s, &tests[i].rd,
&tests[i].exact, "FE_DOWNWARD",
ROUNDING_TESTS (float, FE_DOWNWARD),
ROUNDING_TESTS (double, FE_DOWNWARD),
ROUNDING_TESTS (long double,
FE_DOWNWARD));
fesetround (save_round_mode);
}
#endif
#ifdef FE_TOWARDZERO
if (!fesetround (FE_TOWARDZERO))
{
result |= test_in_one_mode (tests[i].s, &tests[i].rz,
&tests[i].exact, "FE_TOWARDZERO",
ROUNDING_TESTS (float, FE_TOWARDZERO),
ROUNDING_TESTS (double, FE_TOWARDZERO),
ROUNDING_TESTS (long double,
FE_TOWARDZERO));
fesetround (save_round_mode);
}
#endif
#ifdef FE_UPWARD
if (!fesetround (FE_UPWARD))
{
result |= test_in_one_mode (tests[i].s, &tests[i].ru,
&tests[i].exact, "FE_UPWARD",
ROUNDING_TESTS (float, FE_UPWARD),
ROUNDING_TESTS (double, FE_UPWARD),
ROUNDING_TESTS (long double, FE_UPWARD));
fesetround (save_round_mode);
}
#endif
}
return result;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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