X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-signbit.c;h=9581190cc67a09a6b55b9fdcd18b8cc568d8cd04;hb=de9f4b14d7c2acc5088ecde5e5ccfdf7532aab29;hp=3e0185916b79123c4ac86fa684074af816c547dc;hpb=0ac95ec362e080d762ac47d2560bac7f741e2861;p=gnulib.git

diff --git a/tests/test-signbit.c b/tests/test-signbit.c
index 3e0185916..9581190cc 100644
--- a/tests/test-signbit.c
+++ b/tests/test-signbit.c
@@ -1,5 +1,5 @@
 /* Test of signbit() substitute.
-   Copyright (C) 2007, 2008 Free Software Foundation, Inc.
+   Copyright (C) 2007, 2008, 2009, 2010 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
@@ -20,25 +20,42 @@
 
 #include <math.h>
 
+/* signbit must be a macro.  */
+#ifndef signbit
+# error missing declaration
+#endif
+
+#include <float.h>
 #include <limits.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#define ASSERT(expr) \
-  do									     \
-    {									     \
-      if (!(expr))							     \
-        {								     \
-          fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
-          abort ();							     \
-        }								     \
-    }									     \
-  while (0)
+
+#include "macros.h"
 
 float zerof = 0.0f;
 double zerod = 0.0;
 long double zerol = 0.0L;
 
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0f.
+   So we use -zerof instead.  */
+
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
+   So we use -zerod instead.  */
+
+/* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
+   So we use minus_zerol 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_zerol (void)
+{
+  return -LDBL_MIN * LDBL_MIN;
+}
+# define minus_zerol compute_minus_zerol ()
+#else
+long double minus_zerol = -0.0L;
+#endif
+
 static void
 test_signbitf ()
 {
@@ -52,9 +69,9 @@ test_signbitf ()
   /* Zeros.  */
   ASSERT (!signbit (0.0f));
   if (1.0f / -zerof < 0)
-    ASSERT (signbit (-0.0f));
+    ASSERT (signbit (-zerof));
   else
-    ASSERT (!signbit (-0.0f));
+    ASSERT (!signbit (-zerof));
   /* Infinite values.  */
   ASSERT (!signbit (1.0f / 0.0f));
   ASSERT (signbit (-1.0f / 0.0f));
@@ -97,9 +114,9 @@ test_signbitd ()
   /* Zeros.  */
   ASSERT (!signbit (0.0));
   if (1.0 / -zerod < 0)
-    ASSERT (signbit (-0.0));
+    ASSERT (signbit (-zerod));
   else
-    ASSERT (!signbit (-0.0));
+    ASSERT (!signbit (-zerod));
   /* Infinite values.  */
   ASSERT (!signbit (1.0 / 0.0));
   ASSERT (signbit (-1.0 / 0.0));
@@ -139,10 +156,10 @@ test_signbitl ()
   ASSERT (signbit (-2.718e-30L));
   /* Zeros.  */
   ASSERT (!signbit (0.0L));
-  if (1.0L / -zerol < 0)
-    ASSERT (signbit (-0.0L));
+  if (1.0L / minus_zerol < 0)
+    ASSERT (signbit (minus_zerol));
   else
-    ASSERT (!signbit (-0.0L));
+    ASSERT (!signbit (minus_zerol));
   /* Infinite values.  */
   ASSERT (!signbit (1.0L / 0.0L));
   ASSERT (signbit (-1.0L / 0.0L));