1 files changed, 164 insertions, 0 deletions
diff --git a/math/test-fenv.c b/math/test-fenv.c
new file mode 100644
index 0000000000..55114cc13b
--- /dev/null
+++ b/math/test-fenv.c
@@ -0,0 +1,164 @@
+/* Test for exception handling functions of libm */
+
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE
+#endif
+
+#include <complex.h>
+#include <math.h>
+#include <float.h>
+#include <fenv.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+/*
+  Since not all architectures might define all exceptions, we define
+  a private set and map accordingly.
+*/
+#define NO_EXC 0
+#define INEXACT_EXC 0x1
+#define DIVBYZERO_EXC 0x2
+#define UNDERFLOW_EXC 0x04
+#define OVERFLOW_EXC 0x08
+#define INVALID_EXC 0x10
+#define ALL_EXC \
+        (INEXACT_EXC | DIVBYZERO_EXC | UNDERFLOW_EXC | OVERFLOW_EXC | \
+         INVALID_EXC)
+
+static int count_errors;
+
+/* Test whether a given exception was raised.  */
+static void
+test_single_exception (short int exception,
+                       short int exc_flag,
+                       fexcept_t fe_flag,
+                       const char *flag_name)
+{
+  if (exception & exc_flag)
+    {
+      if (fetestexcept (fe_flag))
+        printf ("  Pass: Exception \"%s\" is set\n", flag_name);
+      else
+        {
+          printf ("  Fail: Exception \"%s\" is not set\n", flag_name);
+          ++count_errors;
+        }
+    }
+  else
+    {
+      if (fetestexcept (fe_flag))
+        {
+          printf ("  Fail: Exception \"%s\" is set\n", flag_name);
+          ++count_errors;
+        }
+      else
+        {
+          printf ("  Pass: Exception \"%s\" is not set\n", flag_name);
+        }
+    }
+}
+
+static void
+test_exceptions (const char *test_name, short int exception)
+{
+  printf ("Test: %s\n", test_name);
+#ifdef FE_DIVBYZERO
+  test_single_exception (exception, DIVBYZERO_EXC, FE_DIVBYZERO,
+                         "DIVBYZERO");
+#endif
+#ifdef FE_INVALID
+  test_single_exception (exception, INVALID_EXC, FE_INVALID,
+                         "INVALID");
+#endif
+#ifdef FE_INEXACT
+  test_single_exception (exception, INEXACT_EXC, FE_INEXACT,
+                         "INEXACT");
+#endif
+#ifdef FE_UNDERFLOW
+  test_single_exception (exception, UNDERFLOW_EXC, FE_UNDERFLOW,
+                         "UNDERFLOW");
+#endif
+#ifdef FE_OVERFLOW
+  test_single_exception (exception, OVERFLOW_EXC, FE_OVERFLOW,
+                         "OVERFLOW");
+#endif
+}
+
+
+static void
+set_single_exc (const char *test_name, int fe_exc, fexcept_t exception)
+{
+  char str[200];
+
+  strcpy (str, test_name);
+  strcat (str, ": set flag, with rest not set");
+  feclearexcept (FE_ALL_EXCEPT);
+  feraiseexcept (exception);
+  test_exceptions (str, fe_exc);
+
+  strcpy (str, test_name);
+  strcat (str, ": clear flag, rest also unset");
+  feclearexcept (exception);
+  test_exceptions (str, NO_EXC);
+
+  strcpy (str, test_name);
+  strcat (str, ": set flag, with rest set");
+  feraiseexcept (FE_ALL_EXCEPT ^ exception);
+  feraiseexcept (exception);
+  test_exceptions (str, ALL_EXC);
+
+  strcpy (str, test_name);
+  strcat (str, ": clear flag, leave rest set");
+  feclearexcept (exception);
+  test_exceptions (str, ALL_EXC ^ fe_exc);
+}
+
+static void
+fe_tests (void)
+{
+  /* clear all exceptions and test if all are cleared */
+  feclearexcept (FE_ALL_EXCEPT);
+  test_exceptions ("feclearexcept (FE_ALL_EXCEPT) clears all exceptions",
+                   NO_EXC);
+
+  /* raise all exceptions and test if all are raised */
+  feraiseexcept (FE_ALL_EXCEPT);
+  test_exceptions ("feraiseexcept (FE_ALL_EXCEPT) raises all exceptions",
+                   ALL_EXC);
+  feclearexcept (FE_ALL_EXCEPT);
+
+
+#ifdef FE_DIVBYZERO
+  set_single_exc ("Set/Clear FE_DIVBYZERO", DIVBYZERO_EXC, FE_DIVBYZERO);
+#endif
+#ifdef FE_INVALID
+  set_single_exc ("Set/Clear FE_INVALID", INVALID_EXC, FE_INVALID);
+#endif
+#ifdef FE_INEXACT
+  set_single_exc ("Set/Clear FE_INEXACT", INEXACT_EXC, FE_INEXACT);
+#endif
+#ifdef FE_UNDERFLOW
+  set_single_exc ("Set/Clear FE_UNDERFLOW", UNDERFLOW_EXC, FE_UNDERFLOW);
+#endif
+#ifdef FE_OVERFLOW
+  set_single_exc ("Set/Clear FE_OVERFLOW", OVERFLOW_EXC, FE_OVERFLOW);
+#endif
+}
+
+int
+main (void)
+{
+  fe_tests ();
+  /* _LIB_VERSION = _SVID;*/
+
+  if (count_errors)
+    {
+      printf ("\n%d errors occured.\n", count_errors);
+      exit (1);
+    }
+  printf ("\n All tests passed successfully.\n");
+  exit (0);
+}