frexp, tests: work around ICC bug with -zero

[gnulib.git] / tests / test-snprintf-posix.h

diff --git a/tests/test-snprintf-posix.h b/tests/test-snprintf-posix.h
index b796d5b..f55e49e 100644 (file)
--- a/tests/test-snprintf-posix.h
+++ b/tests/test-snprintf-posix.h
@@ -16,6 +16,7 @@
 
 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
 
+#include "minus-zero.h"
 #include "nan.h"
 
 /* The SGI MIPS floating-point format does not distinguish 0.0 and -0.0.  */
@@ -23,30 +24,10 @@ static int
 have_minus_zero ()
 {
   static double plus_zero = 0.0;
-  double minus_zero = - plus_zero;
+  double minus_zero = minus_zerod;
   return memcmp (&plus_zero, &minus_zero, sizeof (double)) != 0;
 }
 
-/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
-   So we use -zerod instead.  */
-double zerod = 0.0;
-
-/* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
-   So we use minus_zerol instead.
-   IRIX cc can't put -0.0L into .data, but can compute at runtime.
-   Note that the expression -LDBL_MIN * LDBL_MIN does not work on other
-   platforms, such as when cross-compiling to PowerPC on MacOS X 10.5.  */
-#if defined __hpux || defined __sgi
-static long double
-compute_minus_zerol (void)
-{
-  return -LDBL_MIN * LDBL_MIN;
-}
-# define minus_zerol compute_minus_zerol ()
-#else
-long double minus_zerol = -0.0L;
-#endif
-
 /* Representation of an 80-bit 'long double' as an initializer for a sequence
    of 'unsigned int' words.  */
 #ifdef WORDS_BIGENDIAN
@@ -192,7 +173,7 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
   { /* Negative zero.  */
     char result[100];
     int retval =
-      my_snprintf (result, sizeof (result), "%a %d", -zerod, 33, 44, 55);
+      my_snprintf (result, sizeof (result), "%a %d", minus_zerod, 33, 44, 55);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0x0p+0 33") == 0);
     ASSERT (retval == strlen (result));
@@ -901,7 +882,7 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
   { /* Negative zero.  */
     char result[100];
     int retval =
-      my_snprintf (result, sizeof (result), "%f %d", -zerod, 33, 44, 55);
+      my_snprintf (result, sizeof (result), "%f %d", minus_zerod, 33, 44, 55);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000 33") == 0);
     ASSERT (retval == strlen (result));
@@ -1415,7 +1396,7 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
   { /* Negative zero.  */
     char result[100];
     int retval =
-      my_snprintf (result, sizeof (result), "%F %d", -zerod, 33, 44, 55);
+      my_snprintf (result, sizeof (result), "%F %d", minus_zerod, 33, 44, 55);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000 33") == 0);
     ASSERT (retval == strlen (result));
@@ -1738,7 +1719,7 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
   { /* Negative zero.  */
     char result[100];
     int retval =
-      my_snprintf (result, sizeof (result), "%e %d", -zerod, 33, 44, 55);
+      my_snprintf (result, sizeof (result), "%e %d", minus_zerod, 33, 44, 55);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000e+00 33") == 0
               || strcmp (result, "-0.000000e+000 33") == 0);
@@ -2403,7 +2384,7 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
   { /* Negative zero.  */
     char result[100];
     int retval =
-      my_snprintf (result, sizeof (result), "%g %d", -zerod, 33, 44, 55);
+      my_snprintf (result, sizeof (result), "%g %d", minus_zerod, 33, 44, 55);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0 33") == 0);
     ASSERT (retval == strlen (result));