X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-floorl-ieee.c;h=24f9b775cf1496a9dfcbc96ceeb7644dc4da6853;hb=032debd69f3b84239767c727598fb3237a3eeaca;hp=05e836e516e410a5b530c1c0855b70c843c9f44d;hpb=cb33aca29894edd6d93b61676fac09666352f610;p=gnulib.git

diff --git a/tests/test-floorl-ieee.c b/tests/test-floorl-ieee.c
index 05e836e51..24f9b775c 100644
--- a/tests/test-floorl-ieee.c
+++ b/tests/test-floorl-ieee.c
@@ -1,5 +1,5 @@
 /* Test of rounding towards negative infinity.
-   Copyright (C) 2010 Free Software Foundation, Inc.
+   Copyright (C) 2010-2012 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
@@ -19,7 +19,10 @@
 #include <math.h>
 
 #include "fpucw.h"
+#include "isnanl-nolibm.h"
 #include "minus-zero.h"
+#include "infinity.h"
+#include "nan.h"
 #include "macros.h"
 
 int
@@ -29,9 +32,28 @@ main ()
 
   BEGIN_LONG_DOUBLE_ROUNDING ();
 
+  /* See IEEE 754, section 6.3:
+       "the sign of the result of the round floating-point number to
+        integral value operation is the sign of the operand. These rules
+        shall apply even when operands or results are zero or infinite."  */
+
   /* Zero.  */
   ASSERT (!signbit (floorl (0.0L)));
   ASSERT (!!signbit (floorl (minus_zerol)) == !!signbit (minus_zerol));
+  /* Positive numbers.  */
+  ASSERT (!signbit (floorl (0.3L)));
+  ASSERT (!signbit (floorl (0.7L)));
+  /* Negative numbers.  */
+  ASSERT (!!signbit (floorl (-0.3L)) == !!signbit (minus_zerol));
+  ASSERT (!!signbit (floorl (-0.7L)) == !!signbit (minus_zerol));
+
+  /* [MX] shaded specification in POSIX.  */
+
+  /* NaN.  */
+  ASSERT (isnanl (floorl (NaNl ())));
+  /* Infinity.  */
+  ASSERT (floorl (Infinityl ()) == Infinityl ());
+  ASSERT (floorl (- Infinityl ()) == - Infinityl ());
 
   return 0;
 }