/* Test of multiplying a 'long double' by a power of 2.
- Copyright (C) 2007-2008 Free Software Foundation, Inc.
+ Copyright (C) 2007-2009 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
#include "fpucw.h"
#include "isnanl-nolibm.h"
+#include "nan.h"
#define ASSERT(expr) \
do \
} \
while (0)
+/* 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));
}
{ /* Negative zero. */
- x = -0.0L;
+ 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));