X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-floorf-ieee.c;h=071a130de7ec757a8c86048710809f9d4bfcbffa;hb=12597d104c0c1d6368eed9a9f1ebacd03f99542e;hp=da13848738f38e4dc3d8f428ea21209a40e33d63;hpb=1d7de2b4c343cfb0eb4d1171acf0877630e32151;p=gnulib.git

diff --git a/tests/test-floorf-ieee.c b/tests/test-floorf-ieee.c
index da1384873..071a130de 100644
--- a/tests/test-floorf-ieee.c
+++ b/tests/test-floorf-ieee.c
@@ -1,5 +1,5 @@
 /* Test of rounding towards negative 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_floorf) (float) = argc ? floorf : 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_floorf (0.0f)));
   ASSERT (!!signbit (my_floorf (minus_zerof)) == !!signbit (minus_zerof));
+  /* Positive numbers.  */
+  ASSERT (!signbit (my_floorf (0.3f)));
+  ASSERT (!signbit (my_floorf (0.7f)));
+  /* Negative numbers.  */
+  ASSERT (!!signbit (my_floorf (-0.3f)) == !!signbit (minus_zerof));
+  ASSERT (!!signbit (my_floorf (-0.7f)) == !!signbit (minus_zerof));
 
   return 0;
 }