Basic math tests.
authordrepper <drepper>
Fri, 8 Oct 1999 16:57:48 +0000 (16:57 +0000)
committerdrepper <drepper>
Fri, 8 Oct 1999 16:57:48 +0000 (16:57 +0000)
math/basic-test.c [new file with mode: 0644]

diff --git a/math/basic-test.c b/math/basic-test.c
new file mode 100644 (file)
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+/* Copyright (C) 1999 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <math.h>
+#include <float.h>
+#include <stdio.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, NANFUNC, EPSILON, HUGEVAL) \
+static void                                                                  \
+NAME (void)                                                                  \
+{                                                                            \
+  /* Variables are declared volatile to forbid some compiler                 \
+     optimizations.  */                                                              \
+  volatile FLOAT Inf_var, NaN_var, zero_var, one_var;                        \
+  FLOAT x1, x2;                                                                      \
+                                                                             \
+  zero_var = 0.0;                                                            \
+  one_var = 1.0;                                                             \
+  NaN_var = zero_var/zero_var;                                               \
+  Inf_var = one_var / zero_var;                                                      \
+                                                                             \
+  (void) &zero_var;                                                          \
+  (void) &one_var;                                                           \
+  (void) &NaN_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 (NaN)", !(isinf (NaN_var)));                        \
+                                                                             \
+  check (#FLOAT " isnan (NaN)", isnan (NaN_var));                            \
+  check (#FLOAT " isnan (-NaN)", isnan (-NaN_var));                          \
+  check (#FLOAT " !isnan (1)", !(isnan (one_var)));                          \
+  check (#FLOAT " !isnan (inf)", !(isnan (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 " NaN != NaN", NaN_var != NaN_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);                                  \
+                                                                             \
+  /*                                                                         \
+     And again with the value returned by the `nan' function.                \
+   */                                                                        \
+  check (#FLOAT " isnan (NAN)", isnan (NANFUNC ("")));                       \
+  check (#FLOAT " isnan (-NAN)", isnan (-NANFUNC ("")));                     \
+  check (#FLOAT " !isinf (NAN)", !(isinf (NANFUNC (""))));                   \
+  check (#FLOAT " !isinf (-NAN)", !(isinf (-NANFUNC (""))));                 \
+  check (#FLOAT " NAN != NAN", NANFUNC ("") != NANFUNC (""));                \
+                                                                             \
+  /* 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);                      \
+}
+
+TEST_FUNC (float_test, float, nanf, FLT_EPSILON, HUGE_VALF)
+TEST_FUNC (double_test, double, nan, DBL_EPSILON, HUGE_VAL)
+#ifndef NO_LONG_DOUBLE
+TEST_FUNC (ldouble_test, long double, nan, LDBL_EPSILON, HUGE_VALL)
+#endif
+
+int
+main (void)
+{
+  float_test ();
+  double_test ();
+
+#ifndef NO_LONG_DOUBLE
+  ldouble_test ();
+#endif
+
+  return errors != 0;
+}