From c1e9bb1a2e57d9fbcd6f75a0fd828609a0d14716 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Sun, 26 Feb 2012 15:09:38 +0100
Subject: [PATCH] Tests for module 'frexp-ieee'.

* modules/frexp-ieee-tests: New file.
* tests/test-frexp-ieee.c: New file.
---
 ChangeLog                |  4 +++
 modules/frexp-ieee-tests | 18 +++++++++++++
 tests/test-frexp-ieee.c  | 67 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 89 insertions(+)
 create mode 100644 modules/frexp-ieee-tests
 create mode 100644 tests/test-frexp-ieee.c

diff --git a/ChangeLog b/ChangeLog
index 3f31e82b9..56c1a0386 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2012-02-26  Bruno Haible  <bruno@clisp.org>
 
+	Tests for module 'frexp-ieee'.
+	* modules/frexp-ieee-tests: New file.
+	* tests/test-frexp-ieee.c: New file.
+
 	New module 'frexp-ieee'.
 	* modules/frexp-ieee: New file.
 
diff --git a/modules/frexp-ieee-tests b/modules/frexp-ieee-tests
new file mode 100644
index 000000000..e3774f554
--- /dev/null
+++ b/modules/frexp-ieee-tests
@@ -0,0 +1,18 @@
+Files:
+tests/test-frexp-ieee.c
+tests/minus-zero.h
+tests/infinity.h
+tests/nan.h
+tests/macros.h
+
+Depends-on:
+isnand-nolibm
+float
+signbit
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-frexp-ieee
+check_PROGRAMS += test-frexp-ieee
+test_frexp_ieee_LDADD = $(LDADD) @FREXP_LIBM@
diff --git a/tests/test-frexp-ieee.c b/tests/test-frexp-ieee.c
new file mode 100644
index 000000000..8a3897e94
--- /dev/null
+++ b/tests/test-frexp-ieee.c
@@ -0,0 +1,67 @@
+/* Test of splitting a double into fraction and mantissa.
+   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/>.  */
+
+#include <config.h>
+
+#include <math.h>
+
+#include "isnand-nolibm.h"
+#include "minus-zero.h"
+#include "infinity.h"
+#include "nan.h"
+#include "macros.h"
+
+int
+main ()
+{
+  /* [MX] shaded specification in POSIX.  */
+
+  /* NaN.  */
+  {
+    int exp = -9999;
+    double mantissa;
+    mantissa = frexp (NaNd (), &exp);
+    ASSERT (isnand (mantissa));
+  }
+
+  /* Signed zero.  */
+  {
+    int exp = -9999;
+    double mantissa;
+    mantissa = frexp (0.0, &exp);
+    ASSERT (mantissa == 0.0);
+    ASSERT (!signbit (mantissa));
+    ASSERT (exp == 0);
+  }
+  {
+    int exp = -9999;
+    double mantissa;
+    mantissa = frexp (minus_zerod, &exp);
+    ASSERT (mantissa == 0.0);
+    ASSERT (!!signbit (mantissa) == !!signbit (minus_zerod));
+    ASSERT (exp == 0);
+  }
+
+  /* Infinity.  */
+  {
+    int exp = -9999;
+    double mantissa;
+    mantissa = frexp (Infinityd (), &exp);
+    ASSERT (mantissa == Infinityd ());
+  }
+
+  return 0;
+}
-- 
2.11.0