floor: Implement result sign according to IEEE 754.

[gnulib.git] / tests / test-floor2.c

diff --git a/tests/test-floor2.c b/tests/test-floor2.c
index 1aca8ab..e239199 100644 (file)
--- a/tests/test-floor2.c
+++ b/tests/test-floor2.c
@@ -63,8 +63,12 @@ floor_reference (DOUBLE x)
 
   if (z > L_(0.0))
     {
+      /* For 0 < x < 1, return +0.0 even if the current rounding mode is
+         FE_DOWNWARD.  */
+      if (z < L_(1.0))
+        z = L_(0.0);
       /* 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;