grab from glibc

test/math/basic-test.c

@@ -0,0 +1,123 @@
+/* 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 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, 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, nanl, LDBL_EPSILON, HUGE_VALL)
+#endif
+
+int
+main (void)
+{
+  float_test ();
+  double_test ();
+
+#ifndef NO_LONG_DOUBLE
+  ldouble_test ();
+#endif
+
+  return errors != 0;
+}

test/math/test-fpucw.c

@@ -0,0 +1,43 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Jaeger <aj@suse.de>, 2000.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <fpu_control.h>
+#include <stdio.h>
+
+int
+main (void)
+{
+#ifdef _FPU_GETCW
+/* Some architectures don't have _FPU_GETCW (e.g. Linux/Alpha).  */
+  fpu_control_t cw;
+
+  _FPU_GETCW (cw);
+
+  cw &= ~_FPU_RESERVED;
+
+  if (cw != (_FPU_DEFAULT & ~_FPU_RESERVED))
+    printf ("control word is 0x%lx but should be 0x%lx.\n",
+	    (long int) cw, (long int) (_FPU_DEFAULT & ~_FPU_RESERVED));
+
+  return cw != (_FPU_DEFAULT & ~_FPU_RESERVED);
+
+#else
+  return 0;
+#endif
+}

test/math/tst-definitions.c

@@ -0,0 +1,47 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2000.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <limits.h>
+#include <math.h>
+#include <stdio.h>
+
+
+int
+main (void)
+{
+  int result = 0;
+
+  if (FP_ILOGB0 != INT_MIN && FP_ILOGB0 != -INT_MAX)
+    {
+      puts ("FP_ILOGB0 has no valid value");
+      result = 1;
+    }
+  else
+    puts ("FP_ILOGB0 value is OK");
+
+  if (FP_ILOGBNAN != INT_MIN && FP_ILOGBNAN != INT_MAX)
+    {
+      puts ("FP_ILOBNAN has no valid value");
+      result = 1;
+    }
+  else
+    puts ("FP_ILOGBNAN value is OK");
+
+  return result;
+}