Tests for module 'remainderf-ieee'.

* modules/remainderf-ieee-tests: New file.
* tests/test-remainderf-ieee.c: New file.
* tests/test-remainder-ieee.h: New file.

1 files changed, 63 insertions, 0 deletions

diff --git a/tests/test-remainder-ieee.h b/tests/test-remainder-ieee.h
new file mode 100644
index 0000000000..443a0edd3e
--- /dev/null
+++ b/tests/test-remainder-ieee.h
@@ -0,0 +1,63 @@
+/* Test of remainder*() function family.
+   Copyright (C) 2012 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+static void
+test_function (void)
+{
+  /* [MX] shaded specification in POSIX.  */
+
+  /* NaN.  */
+  ASSERT (ISNAN (REMAINDER (NAN, L_(2.0))));
+  ASSERT (ISNAN (REMAINDER (NAN, L_(0.0))));
+  ASSERT (ISNAN (REMAINDER (L_(2.0), NAN)));
+  ASSERT (ISNAN (REMAINDER (L_(0.0), NAN)));
+  ASSERT (ISNAN (REMAINDER (NAN, NAN)));
+
+  /* y is zero.  */
+  ASSERT (ISNAN (REMAINDER (L_(2.0), L_(0.0))));
+  ASSERT (ISNAN (REMAINDER (L_(2.0), MINUS_ZERO)));
+  ASSERT (ISNAN (REMAINDER (INFINITY, L_(0.0))));
+  ASSERT (ISNAN (REMAINDER (INFINITY, MINUS_ZERO)));
+
+  /* x is infinite.  */
+  ASSERT (ISNAN (REMAINDER (INFINITY, L_(2.0))));
+  ASSERT (ISNAN (REMAINDER (INFINITY, - L_(2.0))));
+
+  /* The following tests originally applied to the FMOD function.
+     They are not specified for the REMAINDER function by POSIX.  */
+
+  /* x is zero.  */
+  {
+    DOUBLE z = REMAINDER (L_(0.0), L_(2.0));
+    ASSERT (z == L_(0.0));
+    ASSERT (!signbit (z));
+  }
+  {
+    DOUBLE z = REMAINDER (MINUS_ZERO, L_(2.0));
+    ASSERT (z == L_(0.0));
+    ASSERT (!!signbit (z) == !!signbit (MINUS_ZERO));
+  }
+  {
+    DOUBLE z = REMAINDER (L_(0.0), - L_(2.0));
+    ASSERT (z == L_(0.0));
+    ASSERT (!signbit (z));
+  }
+  {
+    DOUBLE z = REMAINDER (MINUS_ZERO, - L_(2.0));
+    ASSERT (z == L_(0.0));
+    ASSERT (!!signbit (z) == !!signbit (MINUS_ZERO));
+  }
+}