X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-round2.c;h=49a0947dce62fdb3ea79c0f7041a72ad1568389f;hb=d5612c714c87555f1059d71d347e20271dced322;hp=b5944a94b2bda5b64c8caac41c89e7d6499a92da;hpb=f2bbde92e487b8446ff201767c430306450220be;p=gnulib.git

diff --git a/tests/test-round2.c b/tests/test-round2.c
index b5944a94b..49a0947dc 100644
--- a/tests/test-round2.c
+++ b/tests/test-round2.c
@@ -1,5 +1,5 @@
 /* Test of rounding to nearest, breaking ties away from zero.
-   Copyright (C) 2007-2008 Free Software Foundation, Inc.
+   Copyright (C) 2007-2012 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
@@ -17,6 +17,9 @@
 /* Written by Ben Pfaff <blp@gnu.org>, 2007.
    Heavily based on code by Bruno Haible. */
 
+/* When this test fails on some platform, build it together with the gnulib
+   module 'fprintf-posix' for optimal debugging output.  */
+
 /* Get the two reference implementations of round under the names
    round_reference1 and round_reference2.
 
@@ -62,8 +65,10 @@ equal (const char *message, DOUBLE x, DOUBLE y0, DOUBLE y1)
     return true;
   else
     {
+#if GNULIB_TEST_FPRINTF_POSIX
       fprintf (stderr, "%s: "FUNCTION"(%g(%a)) = %g(%a) or %g(%a)?\n",
-	       message, x, x, y0, y0, y1, y1);
+               message, x, x, y0, y0, y1, y1);
+#endif
       return false;
     }
 }
@@ -92,17 +97,17 @@ main (void)
   for (highbits = 0; highbits < (1 << NUM_HIGHBITS); highbits++)
     for (lowbits = 0; lowbits < (1 << NUM_LOWBITS); lowbits++)
       {
-	/* Combine highbits and lowbits into a floating-point number,
-	   sign-extending the lowbits to DOUBLE_BITS-NUM_HIGHBITS bits.	 */
-	union { DOUBLE f; DOUBLE_UINT i; } janus;
-	verify (sizeof janus.f == sizeof janus.i);
-	janus.i = lowbits | (highbits << (DOUBLE_BITS - NUM_HIGHBITS));
-	if (lowbits >> (NUM_LOWBITS - 1))
-	  janus.i |= ((DOUBLE_UINT) -1
-		      >> (NUM_LOWBITS + NUM_HIGHBITS)
-		      << NUM_LOWBITS);
-	if (!check (janus.f))
-	  error = true;
+        /* Combine highbits and lowbits into a floating-point number,
+           sign-extending the lowbits to DOUBLE_BITS-NUM_HIGHBITS bits.  */
+        union { DOUBLE f; DOUBLE_UINT i; } janus;
+        verify (sizeof janus.f == sizeof janus.i);
+        janus.i = lowbits | (highbits << (DOUBLE_BITS - NUM_HIGHBITS));
+        if (lowbits >> (NUM_LOWBITS - 1))
+          janus.i |= ((DOUBLE_UINT) -1
+                      >> (NUM_LOWBITS + NUM_HIGHBITS)
+                      << NUM_LOWBITS);
+        if (!check (janus.f))
+          error = true;
       }
   return (error ? 1 : 0);
 }