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glibc/math/basic-test.c
Siddhesh Poyarekar 30891f35fa Remove "Contributed by" lines 
We stopped adding "Contributed by" or similar lines in sources in 2012
in favour of git logs and keeping the Contributors section of the
glibc manual up to date.  Removing these lines makes the license
header a bit more consistent across files and also removes the
possibility of error in attribution when license blocks or files are
copied across since the contributed-by lines don't actually reflect
reality in those cases.

Move all "Contributed by" and similar lines (Written by, Test by,
etc.) into a new file CONTRIBUTED-BY to retain record of these
contributions.  These contributors are also mentioned in
manual/contrib.texi, so we just maintain this additional record as a
courtesy to the earlier developers.

The following scripts were used to filter a list of files to edit in
place and to clean up the CONTRIBUTED-BY file respectively.  These
were not added to the glibc sources because they're not expected to be
of any use in future given that this is a one time task:

https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc
https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2021-09-03 22:06:44 +05:30

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/* Copyright (C) 1999-2021 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 <math.h>
#include <float.h>
#include <stdio.h>
#include <math-tests.h>
static int errors = 0;
static void
check (const char *testname, int result)
{
if (!result) {
printf ("Failure: %s\n", testname);
errors++;
}
}
#define TEST_FUNC(NAME, FLOAT, SUFFIX, EPSILON, HUGEVAL) \
static void \
NAME (void) \
{ \
/* Variables are declared volatile to forbid some compiler \
optimizations. */ \
volatile FLOAT Inf_var, qNaN_var, zero_var, one_var; \
/* A sNaN is only guaranteed to be representable in variables with */ \
/* static (or thread-local) storage duration. */ \
static volatile FLOAT sNaN_var = __builtin_nans ## SUFFIX (""); \
static volatile FLOAT minus_sNaN_var = -__builtin_nans ## SUFFIX (""); \
FLOAT x1, x2; \
\
zero_var = 0.0; \
one_var = 1.0; \
qNaN_var = __builtin_nan ## SUFFIX (""); \
Inf_var = one_var / zero_var; \
\
(void) &zero_var; \
(void) &one_var; \
(void) &qNaN_var; \
(void) &sNaN_var; \
(void) &minus_sNaN_var; \
(void) &Inf_var; \
\
\
check (#FLOAT " isinf (inf) == 1", isinf (Inf_var) == 1); \
check (#FLOAT " isinf (-inf) == -1", isinf (-Inf_var) == -1); \
check (#FLOAT " !isinf (1)", !(isinf (one_var))); \
check (#FLOAT " !isinf (qNaN)", !(isinf (qNaN_var))); \
if (SNAN_TESTS (FLOAT)) \
check (#FLOAT " !isinf (sNaN)", !(isinf (sNaN_var))); \
\
check (#FLOAT " isnan (qNaN)", isnan (qNaN_var)); \
if (SNAN_TESTS (FLOAT)) \
check (#FLOAT " isnan (sNaN)", isnan (sNaN_var)); \
check (#FLOAT " isnan (-qNaN)", isnan (-qNaN_var)); \
if (SNAN_TESTS (FLOAT)) \
check (#FLOAT " isnan (-sNaN)", isnan (minus_sNaN_var)); \
check (#FLOAT " !isnan (1)", !(isnan (one_var))); \
check (#FLOAT " !isnan (inf)", !(isnan (Inf_var))); \
\
check (#FLOAT " !issignaling (qNaN)", !(issignaling (qNaN_var))); \
if (SNAN_TESTS (FLOAT)) \
check (#FLOAT " issignaling (sNaN)", issignaling (sNaN_var)); \
check (#FLOAT " !issignaling (-qNaN)", !(issignaling (-qNaN_var))); \
if (SNAN_TESTS (FLOAT)) \
check (#FLOAT " issignaling (-sNaN)", issignaling (minus_sNaN_var)); \
check (#FLOAT " !issignaling (1)", !(issignaling (one_var))); \
check (#FLOAT " !issignaling (inf)", !(issignaling (Inf_var))); \
\
check (#FLOAT " inf == inf", Inf_var == Inf_var); \
check (#FLOAT " -inf == -inf", -Inf_var == -Inf_var); \
check (#FLOAT " inf != -inf", Inf_var != -Inf_var); \
check (#FLOAT " qNaN != qNaN", qNaN_var != qNaN_var); \
if (SNAN_TESTS (FLOAT)) \
check (#FLOAT " sNaN != sNaN", sNaN_var != sNaN_var); \
if (SNAN_TESTS (FLOAT)) \
check (#FLOAT " qNaN != sNaN", qNaN_var != sNaN_var); \
if (SNAN_TESTS (FLOAT)) \
check (#FLOAT " -sNaN != -sNaN", minus_sNaN_var != minus_sNaN_var); \
if (SNAN_TESTS (FLOAT)) \
check (#FLOAT " sNaN != -sNaN", sNaN_var != minus_sNaN_var); \
if (SNAN_TESTS (FLOAT)) \
check (#FLOAT " qNaN != -sNaN", qNaN_var != minus_sNaN_var); \
\
/* \
the same tests but this time with NAN from <bits/nan.h> \
NAN is a double const \
*/ \
check (#FLOAT " isnan (NAN)", isnan (NAN)); \
check (#FLOAT " isnan (-NAN)", isnan (-NAN)); \
check (#FLOAT " !isinf (NAN)", !(isinf (NAN))); \
check (#FLOAT " !isinf (-NAN)", !(isinf (-NAN))); \
check (#FLOAT " NAN != NAN", NAN != NAN); \
check (#FLOAT " NAN != qNaN", NAN != qNaN_var); \
if (SNAN_TESTS (FLOAT)) \
check (#FLOAT " NAN != sNaN", NAN != sNaN_var); \
if (SNAN_TESTS (FLOAT)) \
check (#FLOAT " NAN != -sNaN", NAN != minus_sNaN_var); \
\
/* \
And again with the value returned by the `nan' function. \
*/ \
check (#FLOAT " isnan (nan (\"\"))", isnan (nan ## SUFFIX (""))); \
check (#FLOAT " isnan (-nan (\"\"))", isnan (-nan ## SUFFIX (""))); \
check (#FLOAT " !isinf (nan (\"\"))", !(isinf (nan ## SUFFIX ("")))); \
check (#FLOAT " !isinf (-nan (\"\"))", !(isinf (-nan ## SUFFIX ("")))); \
check (#FLOAT " nan (\"\") != nan (\"\")", \
nan ## SUFFIX ("") != nan ## SUFFIX ("")); \
check (#FLOAT " nan (\"\") != qNaN", nan ## SUFFIX ("") != qNaN_var); \
if (SNAN_TESTS (FLOAT)) \
check (#FLOAT " nan (\"\") != sNaN", nan ## SUFFIX ("") != sNaN_var); \
if (SNAN_TESTS (FLOAT)) \
check (#FLOAT " nan (\"\") != -sNaN", \
nan ## SUFFIX ("") != minus_sNaN_var); \
\
/* test if EPSILON is ok */ \
x1 = 1.0; \
x2 = x1 + EPSILON; \
check (#FLOAT " 1 != 1+EPSILON", x1 != x2); \
\
x1 = 1.0; \
x2 = x1 - EPSILON; \
check (#FLOAT " 1 != 1-EPSILON", x1 != x2); \
\
/* test if HUGE_VALx is ok */ \
x1 = HUGEVAL; \
check (#FLOAT " isinf (HUGE_VALx) == +1", isinf (x1) == +1); \
x1 = - HUGEVAL; \
check (#FLOAT " isinf (-HUGE_VALx) == -1", isinf (x1) == -1); \
}
#define TEST_CONVERT(NAME, FLOAT, DOUBLE, SUFFIX) \
void \
NAME (void) \
{ \
volatile DOUBLE Inf_var, qNaN_var, zero_var, one_var; \
/* A sNaN is only guaranteed to be representable in variables with */ \
/* static (or thread-local) storage duration. */ \
static volatile DOUBLE sNaN_var = __builtin_nans ## SUFFIX (""); \
FLOAT x1, x2; \
\
zero_var = 0.0; \
one_var = 1.0; \
qNaN_var = __builtin_nan ## SUFFIX (""); \
Inf_var = one_var / zero_var; \
\
(void) &qNaN_var; \
(void) &sNaN_var; \
(void) &Inf_var; \
\
x1 = (FLOAT) qNaN_var; \
check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") qNaN, isnan", isnan (x1)); \
check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") qNaN, !issignaling", \
!issignaling (x1)); \
if (SNAN_TESTS (FLOAT)) \
{ \
x1 = (FLOAT) sNaN_var; \
check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") sNaN, isnan", isnan (x1)); \
if (SNAN_TESTS_TYPE_CAST) \
{ \
/* Upon type conversion, a sNaN is converted into a qNaN plus an */ \
/* INVALID exception (not checked here). */ \
check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") sNaN, !issignaling", \
!issignaling (x1)); \
} \
} \
x2 = (FLOAT) Inf_var; \
check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") Inf", isinf (x2) != 0); \
}
TEST_FUNC (float_test, float, f, FLT_EPSILON, HUGE_VALF)
TEST_FUNC (double_test, double, , DBL_EPSILON, HUGE_VAL)
TEST_CONVERT (convert_dfsf_test, float, double, )
TEST_CONVERT (convert_sfdf_test, double, float, f)
#if LDBL_MANT_DIG > DBL_MANT_DIG
TEST_FUNC (ldouble_test, long double, l, LDBL_EPSILON, HUGE_VALL)
TEST_CONVERT (convert_tfsf_test, float, long double, l)
TEST_CONVERT (convert_sftf_test, long double, float, f)
TEST_CONVERT (convert_tfdf_test, double, long double, l)
TEST_CONVERT (convert_dftf_test, long double, double, )
#endif
int
do_test (void)
{
float_test ();
double_test ();
convert_dfsf_test();
convert_sfdf_test();
#if LDBL_MANT_DIG > DBL_MANT_DIG
ldouble_test ();
convert_tfsf_test();
convert_sftf_test();
convert_tfdf_test();
convert_dftf_test();
#endif
return errors != 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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