mbrlen: Fix cross-compilation guess for AIX.

[gnulib.git] / tests / test-ldexpl.c

diff --git a/tests/test-ldexpl.c b/tests/test-ldexpl.c
index bc1aeae..f3b4e6f 100644 (file)
--- a/tests/test-ldexpl.c
+++ b/tests/test-ldexpl.c
@@ -1,10 +1,10 @@
 /* Test of multiplying a 'long double' by a power of 2.
-   Copyright (C) 2007 Free Software Foundation, Inc.
+   Copyright (C) 2007-2010 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   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 2, or (at your option)
-   any later version.
+   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
@@ -12,8 +12,7 @@
    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, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
 
@@ -21,13 +20,31 @@
 
 #include <math.h>
 
+#include "signature.h"
+SIGNATURE_CHECK (ldexpl, long double, (long double, int));
+
 #include <float.h>
-#include <stdlib.h>
 
 #include "fpucw.h"
 #include "isnanl-nolibm.h"
-
-#define ASSERT(expr) if (!(expr)) abort ();
+#include "nan.h"
+#include "macros.h"
+
+/* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
+   So we use minus_zero instead.
+   IRIX cc can't put -0.0L into .data, but can compute at runtime.
+   Note that the expression -LDBL_MIN * LDBL_MIN does not work on other
+   platforms, such as when cross-compiling to PowerPC on MacOS X 10.5.  */
+#if defined __hpux || defined __sgi
+static long double
+compute_minus_zero (void)
+{
+  return -LDBL_MIN * LDBL_MIN;
+}
+# define minus_zero compute_minus_zero ()
+#else
+long double minus_zero = -0.0L;
+#endif
 
 int
 main ()
@@ -40,7 +57,7 @@ main ()
   BEGIN_LONG_DOUBLE_ROUNDING ();
 
   { /* NaN.  */
-    x = 0.0L / 0.0L;
+    x = NaNl ();
     y = ldexpl (x, 0); ASSERT (isnanl (y));
     y = ldexpl (x, 5); ASSERT (isnanl (y));
     y = ldexpl (x, -5); ASSERT (isnanl (y));
@@ -62,16 +79,16 @@ main ()
 
   { /* Positive zero.  */
     x = 0.0L;
-    y = ldexpl (x, 0); ASSERT (y == x);
-    y = ldexpl (x, 5); ASSERT (y == x);
-    y = ldexpl (x, -5); ASSERT (y == x);
+    y = ldexpl (x, 0); ASSERT (y == x); ASSERT (!signbit (x));
+    y = ldexpl (x, 5); ASSERT (y == x); ASSERT (!signbit (x));
+    y = ldexpl (x, -5); ASSERT (y == x); ASSERT (!signbit (x));
   }
 
   { /* Negative zero.  */
-    x = -0.0L;
-    y = ldexpl (x, 0); ASSERT (y == x);
-    y = ldexpl (x, 5); ASSERT (y == x);
-    y = ldexpl (x, -5); ASSERT (y == x);
+    x = minus_zero;
+    y = ldexpl (x, 0); ASSERT (y == x); ASSERT (signbit (x));
+    y = ldexpl (x, 5); ASSERT (y == x); ASSERT (signbit (x));
+    y = ldexpl (x, -5); ASSERT (y == x); ASSERT (signbit (x));
   }
 
   { /* Positive finite number.  */
@@ -99,9 +116,9 @@ main ()
       y = ldexpl (x, 0); ASSERT (y == x);
       y = ldexpl (x, 5); ASSERT (y == x * 32.0L);
       if (i - 5 >= LDBL_MIN_EXP)
-       {
-         y = ldexpl (x, -5); ASSERT (y == x * 0.03125L);
-       }
+        {
+          y = ldexpl (x, -5); ASSERT (y == x * 0.03125L);
+        }
     }
   for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
     {