X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-truncf-ieee.c;h=9d808a240aa4ab492c944d15002707281704d7b7;hb=74a0def25839a0c6934ca611e605694840877140;hp=c5c779ae7054fb321e6988c0fe0d828a77fa83b9;hpb=fdb0fd9e820d721e6492b041ddc49d49b4c61e64;p=gnulib.git

diff --git a/tests/test-truncf-ieee.c b/tests/test-truncf-ieee.c
index c5c779ae7..9d808a240 100644
--- a/tests/test-truncf-ieee.c
+++ b/tests/test-truncf-ieee.c
@@ -1,5 +1,5 @@
 /* Test of rounding towards zero.
-   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
@@ -24,9 +24,20 @@
 int
 main ()
 {
+  /* 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 (truncf (0.0f)));
   ASSERT (!!signbit (truncf (minus_zerof)) == !!signbit (minus_zerof));
+  /* Positive numbers.  */
+  ASSERT (!signbit (truncf (0.3f)));
+  ASSERT (!signbit (truncf (0.7f)));
+  /* Negative numbers.  */
+  ASSERT (!!signbit (truncf (-0.3f)) == !!signbit (minus_zerof));
+  ASSERT (!!signbit (truncf (-0.7f)) == !!signbit (minus_zerof));
 
   return 0;
 }