X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-ceilf-ieee.c;h=c071265795c8804504a867f309cc88a88d67a5ae;hb=60e3ab133c3ffe0bae411a44829498faf8816b34;hp=475e4f416cd2ed70f91e68d360b7a0a90479f829;hpb=f10ca7e0a421ace0dd6124bd8f0ba8e7570ebec3;p=gnulib.git

diff --git a/tests/test-ceilf-ieee.c b/tests/test-ceilf-ieee.c
index 475e4f416..c07126579 100644
--- a/tests/test-ceilf-ieee.c
+++ b/tests/test-ceilf-ieee.c
@@ -1,5 +1,5 @@
 /* Test of rounding towards positive infinity.
-   Copyright (C) 2010 Free Software Foundation, Inc.
+   Copyright (C) 2010-2011 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
@@ -37,9 +37,20 @@ main (int argc, char **argv _GL_UNUSED)
 {
   float (*my_ceilf) (float) = argc ? ceilf : dummy;
 
+  /* 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 (my_ceilf (0.0f)));
   ASSERT (!!signbit (my_ceilf (minus_zerof)) == !!signbit (minus_zerof));
+  /* Positive numbers.  */
+  ASSERT (!signbit (my_ceilf (0.3f)));
+  ASSERT (!signbit (my_ceilf (0.7f)));
+  /* Negative numbers.  */
+  ASSERT (!!signbit (my_ceilf (-0.3f)) == !!signbit (minus_zerof));
+  ASSERT (!!signbit (my_ceilf (-0.7f)) == !!signbit (minus_zerof));
 
   return 0;
 }