/* 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
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. */
#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 ()
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));
{ /* 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. */
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)
{