153 lines
5.3 KiB
C
153 lines
5.3 KiB
C
/* Copyright (C) 1999, 2007 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Andreas Jaeger <aj@suse.de>, 1999.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <math.h>
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#include <float.h>
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#include <stdio.h>
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static int errors = 0;
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static void
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check (const char *testname, int result)
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{
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if (!result) {
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printf ("Failure: %s\n", testname);
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errors++;
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}
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}
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#define TEST_FUNC(NAME, FLOAT, NANFUNC, EPSILON, HUGEVAL) \
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static void \
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NAME (void) \
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{ \
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/* Variables are declared volatile to forbid some compiler \
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optimizations. */ \
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volatile FLOAT Inf_var, NaN_var, zero_var, one_var; \
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FLOAT x1, x2; \
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\
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zero_var = 0.0; \
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one_var = 1.0; \
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NaN_var = zero_var / zero_var; \
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Inf_var = one_var / zero_var; \
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\
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(void) &zero_var; \
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(void) &one_var; \
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(void) &NaN_var; \
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(void) &Inf_var; \
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\
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\
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check (#FLOAT " isinf (inf) == 1", isinf (Inf_var) == 1); \
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check (#FLOAT " isinf (-inf) == -1", isinf (-Inf_var) == -1); \
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check (#FLOAT " !isinf (1)", !(isinf (one_var))); \
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check (#FLOAT " !isinf (NaN)", !(isinf (NaN_var))); \
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\
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check (#FLOAT " isnan (NaN)", isnan (NaN_var)); \
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check (#FLOAT " isnan (-NaN)", isnan (-NaN_var)); \
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check (#FLOAT " !isnan (1)", !(isnan (one_var))); \
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check (#FLOAT " !isnan (inf)", !(isnan (Inf_var))); \
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\
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check (#FLOAT " inf == inf", Inf_var == Inf_var); \
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check (#FLOAT " -inf == -inf", -Inf_var == -Inf_var); \
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check (#FLOAT " inf != -inf", Inf_var != -Inf_var); \
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check (#FLOAT " NaN != NaN", NaN_var != NaN_var); \
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\
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/* \
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the same tests but this time with NAN from <bits/nan.h> \
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NAN is a double const \
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*/ \
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check (#FLOAT " isnan (NAN)", isnan (NAN)); \
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check (#FLOAT " isnan (-NAN)", isnan (-NAN)); \
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check (#FLOAT " !isinf (NAN)", !(isinf (NAN))); \
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check (#FLOAT " !isinf (-NAN)", !(isinf (-NAN))); \
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check (#FLOAT " NAN != NAN", NAN != NAN); \
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\
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/* \
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And again with the value returned by the `nan' function. \
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*/ \
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check (#FLOAT " isnan (NAN)", isnan (NANFUNC (""))); \
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check (#FLOAT " isnan (-NAN)", isnan (-NANFUNC (""))); \
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check (#FLOAT " !isinf (NAN)", !(isinf (NANFUNC ("")))); \
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check (#FLOAT " !isinf (-NAN)", !(isinf (-NANFUNC ("")))); \
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check (#FLOAT " NAN != NAN", NANFUNC ("") != NANFUNC ("")); \
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\
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/* test if EPSILON is ok */ \
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x1 = 1.0; \
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x2 = x1 + EPSILON; \
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check (#FLOAT " 1 != 1+EPSILON", x1 != x2); \
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\
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x1 = 1.0; \
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x2 = x1 - EPSILON; \
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check (#FLOAT " 1 != 1-EPSILON", x1 != x2); \
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\
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/* test if HUGE_VALx is ok */ \
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x1 = HUGEVAL; \
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check (#FLOAT " isinf (HUGE_VALx) == +1", isinf (x1) == +1); \
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x1 = - HUGEVAL; \
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check (#FLOAT " isinf (-HUGE_VALx) == -1", isinf (x1) == -1); \
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}
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#define TEST_TRUNC(NAME, FLOAT, DOUBLE) \
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void \
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NAME (void) \
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{ \
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volatile DOUBLE Inf_var, NaN_var, zero_var, one_var; \
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FLOAT x1, x2; \
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\
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zero_var = 0.0; \
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one_var = 1.0; \
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NaN_var = zero_var / zero_var; \
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Inf_var = one_var / zero_var; \
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\
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(void) &NaN_var; \
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(void) &Inf_var; \
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\
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x1 = (FLOAT) NaN_var; \
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check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") NaN", isnan (x1) != 0); \
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x2 = (FLOAT) Inf_var; \
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check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") Inf", isinf (x2) != 0); \
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}
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TEST_FUNC (float_test, float, nanf, FLT_EPSILON, HUGE_VALF)
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TEST_FUNC (double_test, double, nan, DBL_EPSILON, HUGE_VAL)
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TEST_TRUNC (truncdfsf_test, float, double)
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#ifndef NO_LONG_DOUBLE
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TEST_FUNC (ldouble_test, long double, nanl, LDBL_EPSILON, HUGE_VALL)
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TEST_TRUNC (trunctfsf_test, float, long double)
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TEST_TRUNC (trunctfdf_test, double, long double)
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#endif
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int
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do_test (void)
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{
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float_test ();
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double_test ();
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truncdfsf_test();
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#ifndef NO_LONG_DOUBLE
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ldouble_test ();
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trunctfsf_test();
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trunctfdf_test();
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#endif
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return errors != 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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