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glibc/math/basic-test.c
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/* Copyright (C) 1999-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Andreas Jaeger <aj@suse.de>, 1999. | |
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/>. */ | |
#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) | |
#ifndef NO_LONG_DOUBLE | |
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(); | |
#ifndef NO_LONG_DOUBLE | |
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" |