X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-signbit.c;h=9581190cc67a09a6b55b9fdcd18b8cc568d8cd04;hb=14051499d596955d8c5e558f78826df4d8945ed1;hp=63b84eb7dce0b704326250a98e187562f3bcda1e;hpb=75d146361fe980e1e1bbb9639edc6fbed5345e82;p=gnulib.git
diff --git a/tests/test-signbit.c b/tests/test-signbit.c
index 63b84eb7d..9581190cc 100644
--- a/tests/test-signbit.c
+++ b/tests/test-signbit.c
@@ -1,10 +1,10 @@
/* Test of signbit() substitute.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -12,8 +12,7 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program. If not, see . */
/* Written by Bruno Haible , 2007. */
@@ -21,25 +20,42 @@
#include
+/* signbit must be a macro. */
+#ifndef signbit
+# error missing declaration
+#endif
+
+#include
#include
-#include
-#include
-
-#define ASSERT(expr) \
- do \
- { \
- if (!(expr)) \
- { \
- fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
- abort (); \
- } \
- } \
- while (0)
+
+#include "macros.h"
float zerof = 0.0f;
double zerod = 0.0;
long double zerol = 0.0L;
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0f.
+ So we use -zerof instead. */
+
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
+ So we use -zerod instead. */
+
+/* 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
+
static void
test_signbitf ()
{
@@ -50,6 +66,12 @@ test_signbitf ()
ASSERT (signbit (-2.718f));
ASSERT (signbit (-2.718e30f));
ASSERT (signbit (-2.718e-30f));
+ /* Zeros. */
+ ASSERT (!signbit (0.0f));
+ if (1.0f / -zerof < 0)
+ ASSERT (signbit (-zerof));
+ else
+ ASSERT (!signbit (-zerof));
/* Infinite values. */
ASSERT (!signbit (1.0f / 0.0f));
ASSERT (signbit (-1.0f / 0.0f));
@@ -89,6 +111,12 @@ test_signbitd ()
ASSERT (signbit (-2.718));
ASSERT (signbit (-2.718e30));
ASSERT (signbit (-2.718e-30));
+ /* Zeros. */
+ ASSERT (!signbit (0.0));
+ if (1.0 / -zerod < 0)
+ ASSERT (signbit (-zerod));
+ else
+ ASSERT (!signbit (-zerod));
/* Infinite values. */
ASSERT (!signbit (1.0 / 0.0));
ASSERT (signbit (-1.0 / 0.0));
@@ -126,6 +154,12 @@ test_signbitl ()
ASSERT (signbit (-2.718L));
ASSERT (signbit (-2.718e30L));
ASSERT (signbit (-2.718e-30L));
+ /* Zeros. */
+ ASSERT (!signbit (0.0L));
+ if (1.0L / minus_zerol < 0)
+ ASSERT (signbit (minus_zerol));
+ else
+ ASSERT (!signbit (minus_zerol));
/* Infinite values. */
ASSERT (!signbit (1.0L / 0.0L));
ASSERT (signbit (-1.0L / 0.0L));