X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-ceil2.c;h=3cc6767358d5b5f2cd2392a7d030431cf0a11559;hb=9723bfe9bb9af8309314ad6230f7661000ba03b1;hp=c26ccc340a46a7fb833dcf7eda60818010650ccf;hpb=fe2a2304a8635cdaabe93e4f5e49960bec1512b1;p=gnulib.git

diff --git a/tests/test-ceil2.c b/tests/test-ceil2.c
index c26ccc340..3cc676735 100644
--- a/tests/test-ceil2.c
+++ b/tests/test-ceil2.c
@@ -1,5 +1,5 @@
 /* Test of rounding towards positive infinity.
-   Copyright (C) 2007-2010 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
@@ -29,6 +29,7 @@
 #include <stdio.h>
 
 #include "isnand-nolibm.h"
+#include "minus-zero.h"
 #include "macros.h"
 
 
@@ -38,6 +39,9 @@
 #define MANT_DIG DBL_MANT_DIG
 #define L_(literal) literal
 
+/* -0.0.  See minus-zero.h.  */
+#define MINUS_ZERO minus_zerod
+
 /* 2^(MANT_DIG-1).  */
 static const DOUBLE TWO_MANT_DIG =
   /* Assume MANT_DIG <= 5 * 31.
@@ -79,8 +83,12 @@ ceil_reference (DOUBLE x)
     }
   else if (z < L_(0.0))
     {
+      /* For -1 < x < 0, return -0.0 regardless of the current rounding
+         mode.  */
+      if (z > L_(-1.0))
+        z = MINUS_ZERO;
       /* Avoid rounding errors for values near -2^k, where k >= MANT_DIG-1.  */
-      if (z > - TWO_MANT_DIG)
+      else if (z > - TWO_MANT_DIG)
         {
           /* Round to the next integer (nearest or up or down, doesn't matter).  */
           z -= TWO_MANT_DIG;