link: LoadLibrary is not needed.

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

diff --git a/tests/test-frexpl.c b/tests/test-frexpl.c
index a91afce..d4babb8 100644 (file)
--- a/tests/test-frexpl.c
+++ b/tests/test-frexpl.c
@@ -1,5 +1,5 @@
 /* Test of splitting a 'long double' into fraction and mantissa.
-   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
@@ -26,6 +26,7 @@
 
 #include "fpucw.h"
 #include "isnanl-nolibm.h"
+#include "nan.h"
 
 /* Avoid some warnings from "gcc -Wshadow".
    This file doesn't use the exp() function.  */
@@ -57,9 +58,21 @@
 # define MIN_NORMAL_EXP LDBL_MIN_EXP
 #endif
 
-/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0L.
-   So we use -zero instead.  */
-long double zero = 0.0L;
+/* 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
 
 static long double
 my_ldexp (long double x, int d)
@@ -83,7 +96,7 @@ main ()
   { /* NaN.  */
     int exp = -9999;
     long double mantissa;
-    x = 0.0L / 0.0L;
+    x = NaNl ();
     mantissa = frexpl (x, &exp);
     ASSERT (isnanl (mantissa));
   }
@@ -117,7 +130,7 @@ main ()
   { /* Negative zero.  */
     int exp = -9999;
     long double mantissa;
-    x = -zero;
+    x = minus_zero;
     mantissa = frexpl (x, &exp);
     ASSERT (exp == 0);
     ASSERT (mantissa == x);