X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-math.c;h=8565925f66bdd43a9f0f4566d85cdc9e738fa766;hb=e677143bef643fc74c206d19a7f8767745ba8774;hp=5c00581d17c8bef64f8df346443d8d9d3156714f;hpb=06945b7c073c0872ec2049c0e0b94f789bf8d77e;p=gnulib.git

diff --git a/tests/test-math.c b/tests/test-math.c
index 5c00581d1..8565925f6 100644
--- a/tests/test-math.c
+++ b/tests/test-math.c
@@ -1,5 +1,5 @@
 /* Test of <math.h> substitute.
-   Copyright (C) 2007, 2008 Free Software Foundation, Inc.
+   Copyright (C) 2007-2011 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
@@ -25,9 +25,29 @@
 choke me
 #endif
 
+#if 0
+/* Check that NAN expands into a constant expression.  */
+static float n = NAN;
+#endif
+
+/* Compare two numbers with ==.
+   This is a separate function because IRIX 6.5 "cc -O" miscompiles an
+   'x == x' test.  */
+static int
+numeric_equal (double x, double y)
+{
+  return x == y;
+}
+
 int
-main ()
+main (void)
 {
   double d = NAN;
-  return d == d;
+  double zero = 0.0;
+  if (numeric_equal (d, d))
+    return 1;
+  d = HUGE_VAL;
+  if (!numeric_equal (d, 1.0 / zero))
+    return 1;
+  return 0;
 }