mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
273 lines
8.6 KiB
C
273 lines
8.6 KiB
C
/* Test for correct rounding of results of strtod and related
|
|
functions.
|
|
Copyright (C) 2012-2018 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
|
|
#define __STDC_WANT_IEC_60559_TYPES_EXT__
|
|
#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>
|
|
|
|
#include "tst-strtod.h"
|
|
|
|
/* Non-standard macros expected to be externally defined:
|
|
|
|
L_(str): Pastes the appropriate modifier to a string literal str.
|
|
|
|
FNPFX: Expands to the correct prefix for the strtod equivalent
|
|
of type CHAR. (e.g str or wcs).
|
|
|
|
CHAR: Expands to the string type being tested (e.g wchar_t or char).
|
|
|
|
STRM: Expands to a string literal suitable for printing CHAR* via
|
|
printf (e.g "%s" or "%ls"). */
|
|
|
|
#define _CONCAT(a, b) a ## b
|
|
#define CONCAT(a, b) _CONCAT (a, b)
|
|
|
|
#define STRTO(x) CONCAT (CONCAT (FNPFX, to), x)
|
|
|
|
#if LDBL_MANT_DIG == 106 && LDBL_MAX_EXP == 1024
|
|
/* This is a stupid hack for IBM long double. This test ignores
|
|
inexact values for long double due to the limitations of the
|
|
format. This ensures rounding tests are ignored. */
|
|
# undef ROUNDING_TESTS_long_double
|
|
# define ROUNDING_TESTS_long_double(x) 0
|
|
#endif
|
|
|
|
/* Generator to create an FTYPE member variabled named FSUF
|
|
used to populate struct member variables. */
|
|
#define FTYPE_MEMBER(FSUF, FTYPE, FTOSTR, LSUF, CSUF) \
|
|
FTYPE FSUF;
|
|
|
|
/* Likewise, but each member is of type bool. */
|
|
#define BOOL_MEMBER(FSUF, FTYPE, FTOSTR, LSUF, CSUF) \
|
|
bool FSUF;
|
|
|
|
#define STRUCT_FOREACH_FLOAT_FTYPE GEN_TEST_STRTOD_FOREACH (FTYPE_MEMBER)
|
|
#define STRUCT_FOREACH_FLOAT_BOOL GEN_TEST_STRTOD_FOREACH (BOOL_MEMBER)
|
|
|
|
/* Define the long double choose (CHOOSE_ld) macro
|
|
to select the appropriate generated long double
|
|
value from the generated test data. */
|
|
#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
|
|
/* This is for the long double == double format. */
|
|
# define CHOOSE_ld(f,d,...) d
|
|
#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && LDBL_MIN_EXP == -16381
|
|
/* This is for the Intel extended float format. */
|
|
# define CHOOSE_ld(f,d,ld64i,...) ld64i
|
|
#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && LDBL_MIN_EXP == -16382
|
|
/* This is for the Motorola extended float format. */
|
|
# define CHOOSE_ld(f,d,ld64i,ld64m,...) ld64m
|
|
#elif LDBL_MANT_DIG == 106 && LDBL_MAX_EXP == 1024
|
|
/* This is for the IBM extended double format. */
|
|
# define CHOOSE_ld(f,d,ld64i,ld64m,ld106,...) ld106
|
|
#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
|
|
/* This is for the IEEE binary128 format. */
|
|
# define CHOOSE_ld(f,d,ld64i,ld64m,ld106,ld113,...) ld113
|
|
#else
|
|
# error "unknown long double format"
|
|
#endif
|
|
|
|
/* Add type specific choosing macros below. */
|
|
#define CHOOSE_f(f,...) f
|
|
#define CHOOSE_f32(f,...) f
|
|
#define CHOOSE_d(f,d,...) d
|
|
#define CHOOSE_f64(f,d,...) d
|
|
#define CHOOSE_f32x(f,d,...) d
|
|
#define CHOOSE_f128(f,d,ld64i,ld64m,ld106,ld113,...) ld113
|
|
/* long double is special, and handled above. _Float16 would require
|
|
updates to the generator to generate appropriate expectations, and
|
|
updates to the test inputs to cover difficult rounding cases for
|
|
_Float16. */
|
|
|
|
#if __HAVE_FLOAT64X
|
|
# if FLT64X_MANT_DIG == 113 && FLT64X_MAX_EXP == 16384
|
|
# define CHOOSE_f64x(f,d,ld64i,ld64m,ld106,ld113,...) ld113
|
|
# elif (FLT64X_MANT_DIG == 64 \
|
|
&& FLT64X_MAX_EXP == 16384 \
|
|
&& FLT64X_MIN_EXP == -16381)
|
|
# define CHOOSE_f64x(f,d,ld64i,...) ld64i
|
|
# else
|
|
# error "unknown _Float64x format"
|
|
# endif
|
|
#endif
|
|
|
|
/* Selector for expected result field of a given type. */
|
|
#define _ENTRY(FSUF, FTYPE, FTOSTR, LSUF, CSUF, ...) \
|
|
CONCAT (CHOOSE_ ## FSUF (__VA_ARGS__), LSUF),
|
|
#define ENTRY(...) \
|
|
GEN_TEST_STRTOD_FOREACH (_ENTRY, __VA_ARGS__)
|
|
|
|
/* Selector for boolean exact tag of expected results. */
|
|
#define _XNTRY(FSUF, FTYPE, FTOSTR, LSUF, CSUF, ...) \
|
|
CHOOSE_ ## FSUF (__VA_ARGS__),
|
|
#define XNTRY(...) \
|
|
GEN_TEST_STRTOD_FOREACH (_XNTRY, __VA_ARGS__)
|
|
|
|
/* This is hacky way around the seemingly unavoidable macro
|
|
expansion of the INFINITY or HUGE_VAL like macros in the
|
|
above. It is assumed the compiler will implicitly convert
|
|
the infinity correctly. */
|
|
#define INF INFINITY + 0.0
|
|
|
|
/* This macro is used in conjunction with the output from the
|
|
gen-tst-strtod-round utility to select the appropriately
|
|
rounded long double value for a given format. */
|
|
#define TEST(s, \
|
|
fx, fd, fn, fz, fu, \
|
|
dx, dd, dn, dz, du, \
|
|
ld64ix, ld64id, ld64in, ld64iz, ld64iu, \
|
|
ld64mx, ld64md, ld64mn, ld64mz, ld64mu, \
|
|
ld106x, ld106d, ld106n, ld106z, ld106u, \
|
|
ld113x, ld113d, ld113n, ld113z, ld113u) \
|
|
{ \
|
|
L_ (s), \
|
|
{ XNTRY (fx, dx, ld64ix, ld64mx, ld106x, ld113x) }, \
|
|
{ \
|
|
{ ENTRY (fn, dn, ld64in, ld64mn, ld106n, ld113n) }, \
|
|
{ ENTRY (fd, dd, ld64id, ld64md, ld106d, ld113d) }, \
|
|
{ ENTRY (fz, dz, ld64iz, ld64mz, ld106z, ld113z) }, \
|
|
{ ENTRY (fu, du, ld64iu, ld64mu, ld106u, ld113u) } \
|
|
} \
|
|
}
|
|
|
|
struct test_exactness
|
|
{
|
|
STRUCT_FOREACH_FLOAT_BOOL
|
|
};
|
|
|
|
struct test_results
|
|
{
|
|
STRUCT_FOREACH_FLOAT_FTYPE
|
|
};
|
|
|
|
struct test {
|
|
const CHAR *s;
|
|
struct test_exactness exact;
|
|
struct test_results r[4];
|
|
};
|
|
|
|
/* Include the generated test data. */
|
|
#include "tst-strtod-round-data.h"
|
|
|
|
#define STRX(x) #x
|
|
#define STR(x) STRX (x)
|
|
#define FNPFXS STR (FNPFX)
|
|
|
|
#ifndef FE_INEXACT
|
|
# define FE_INEXACT 0
|
|
#endif
|
|
|
|
#define GEN_ONE_TEST(FSUF, FTYPE, FTOSTR, LSUF, CSUF) \
|
|
{ \
|
|
feclearexcept (FE_INEXACT); \
|
|
FTYPE f = STRTO (FSUF) (s, NULL); \
|
|
if (f != expected->FSUF \
|
|
|| (copysign ## CSUF) (1.0 ## LSUF, f) \
|
|
!= (copysign ## CSUF) (1.0 ## LSUF, expected->FSUF)) \
|
|
{ \
|
|
char efstr[FSTRLENMAX]; \
|
|
char fstr[FSTRLENMAX]; \
|
|
FTOSTR (efstr, FSTRLENMAX, "%a", expected->FSUF); \
|
|
FTOSTR (fstr, FSTRLENMAX, "%a", f); \
|
|
printf (FNPFXS "to" #FSUF " (" STRM ") returned %s not " \
|
|
"%s (%s)\n", s, fstr, efstr, mode_name); \
|
|
if (ROUNDING_TESTS (FTYPE, rnd_mode) || exact->FSUF) \
|
|
result = 1; \
|
|
else \
|
|
printf ("ignoring this inexact result\n"); \
|
|
} \
|
|
else if (FE_INEXACT != 0) \
|
|
{ \
|
|
bool inexact_raised = fetestexcept (FE_INEXACT) != 0; \
|
|
if (inexact_raised != !exact->FSUF) \
|
|
{ \
|
|
printf (FNPFXS "to" #FSUF " (" STRM ") inexact %d " \
|
|
"not %d\n", s, inexact_raised, !exact->FSUF); \
|
|
if (EXCEPTION_TESTS (FTYPE)) \
|
|
result = 1; \
|
|
else \
|
|
printf ("ignoring this exception error\n"); \
|
|
} \
|
|
} \
|
|
}
|
|
|
|
static int
|
|
test_in_one_mode (const CHAR *s, const struct test_results *expected,
|
|
const struct test_exactness *exact, const char *mode_name,
|
|
int rnd_mode)
|
|
{
|
|
int result = 0;
|
|
GEN_TEST_STRTOD_FOREACH (GEN_ONE_TEST)
|
|
return result;
|
|
}
|
|
|
|
static const struct fetestmodes
|
|
{
|
|
const char *mode_name;
|
|
int rnd_mode;
|
|
int rnd_i; /* Corresponding index into r array of struct test. */
|
|
} modes[] = {
|
|
{ "default rounding mode", FE_TONEAREST, 0 },
|
|
#ifdef FE_DOWNWARD
|
|
{ "FE_DOWNWARD", FE_DOWNWARD, 1 },
|
|
#endif
|
|
#ifdef FE_TOWARDZERO
|
|
{ "FE_TOWARDZERO", FE_TOWARDZERO, 2 },
|
|
#endif
|
|
#ifdef FE_UPWARD
|
|
{ "FE_UPWARD", FE_UPWARD, 3 },
|
|
#endif
|
|
{}
|
|
};
|
|
|
|
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].r[modes[0].rnd_i],
|
|
&tests[i].exact, modes[0].mode_name,
|
|
modes[0].rnd_mode);
|
|
for (const struct fetestmodes *m = &modes[1]; m->mode_name != NULL; m++)
|
|
{
|
|
if (!fesetround (m->rnd_mode))
|
|
{
|
|
result |= test_in_one_mode (tests[i].s, &tests[i].r[m->rnd_i],
|
|
&tests[i].exact, m->mode_name,
|
|
m->rnd_mode);
|
|
fesetround (save_round_mode);
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
#define TEST_FUNCTION do_test ()
|
|
#include "../test-skeleton.c"
|