X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-round2.c;h=22fdf265ca12eb8d2c450540eef55d73754f5780;hb=cd56634a4a8179fd5a4419fbb3e27211b042ab1c;hp=47d818c1d5ab549c2747a7c702fb7ecc1d8afb67;hpb=7094a1e0d56aa303077cc0bccaa559a28e613ade;p=gnulib.git

diff --git a/tests/test-round2.c b/tests/test-round2.c
index 47d818c1d..22fdf265c 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 Free Software Foundation, Inc.
+   Copyright (C) 2007-2014 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
@@ -17,9 +17,12 @@
 /* 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.
-   
+
    round.c will #include <config.h> for us. */
 #define FLOOR_BASED_ROUND round_reference1
 #define FLOOR_FREE_ROUND round_reference2
@@ -37,15 +40,15 @@
 #ifdef USE_LONG_DOUBLE
 # error Long double not supported.
 #elif ! defined USE_FLOAT
-# include "isnan.h"
-# define ISNAN isnan
+# include "isnand-nolibm.h"
+# define ISNAN isnand
 # define FUNCTION "round"
 # define DOUBLE_UINT uint64_t
 # define DOUBLE_BITS 64
 # define NUM_HIGHBITS 13
 # define NUM_LOWBITS 4
 #else /* defined USE_FLOAT */
-# include "isnanf.h"
+# include "isnanf-nolibm.h"
 # define ISNAN isnanf
 # define FUNCTION "roundf"
 # define DOUBLE_UINT uint32_t
@@ -60,10 +63,12 @@ equal (const char *message, DOUBLE x, DOUBLE y0, DOUBLE y1)
 {
   if (ISNAN (y0) ? ISNAN (y1) : y0 == y1)
     return true;
-  else 
+  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;
     }
 }
@@ -75,9 +80,9 @@ check (DOUBLE x)
   DOUBLE ref1 = round_reference1 (x);
   DOUBLE ref2 = round_reference2 (x);
   DOUBLE result = ROUND (x);
-  
+
   /* If the reference implementations disagree, bail out immediately.  */
-  if (!equal ("reference implementations disagree", x, ref1, ref2)) 
+  if (!equal ("reference implementations disagree", x, ref1, ref2))
     exit (EXIT_FAILURE);
 
   /* If the actual implementation is wrong, return an error code.  */
@@ -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);
 }