X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=tests%2Ftest-frexpl.c;h=d4babb88c3c80378a57fbb281819f447f77c1632;hb=b6dfa79ff86b50398ad397c4c43954d005866ce9;hp=93cfa14434f37ae2c0b386ec908c13e896d57ebb;hpb=75d146361fe980e1e1bbb9639edc6fbed5345e82;p=gnulib.git
diff --git a/tests/test-frexpl.c b/tests/test-frexpl.c
index 93cfa1443..d4babb88c 100644
--- a/tests/test-frexpl.c
+++ b/tests/test-frexpl.c
@@ -1,10 +1,10 @@
/* Test of splitting a 'long double' into fraction and mantissa.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007-2009 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. */
@@ -27,6 +26,12 @@
#include "fpucw.h"
#include "isnanl-nolibm.h"
+#include "nan.h"
+
+/* Avoid some warnings from "gcc -Wshadow".
+ This file doesn't use the exp() function. */
+#undef exp
+#define exp exponent
#define ASSERT(expr) \
do \
@@ -34,20 +39,41 @@
if (!(expr)) \
{ \
fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+ fflush (stderr); \
abort (); \
} \
} \
while (0)
/* On MIPS IRIX machines, LDBL_MIN_EXP is -1021, but the smallest reliable
- exponent for 'long double' is -964. For exponents below that, the
- precision may be truncated to the precision used for 'double'. */
+ exponent for 'long double' is -964. Similarly, on PowerPC machines,
+ LDBL_MIN_EXP is -1021, but the smallest reliable exponent for 'long double'
+ is -968. For exponents below that, the precision may be truncated to the
+ precision used for 'double'. */
#ifdef __sgi
# define MIN_NORMAL_EXP (LDBL_MIN_EXP + 57)
+#elif defined __ppc || defined __ppc__ || defined __powerpc || defined __powerpc__
+# define MIN_NORMAL_EXP (LDBL_MIN_EXP + 53)
#else
# define MIN_NORMAL_EXP LDBL_MIN_EXP
#endif
+/* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
+ So we use minus_zero 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_zero (void)
+{
+ return -LDBL_MIN * LDBL_MIN;
+}
+# define minus_zero compute_minus_zero ()
+#else
+long double minus_zero = -0.0L;
+#endif
+
static long double
my_ldexp (long double x, int d)
{
@@ -70,7 +96,7 @@ main ()
{ /* NaN. */
int exp = -9999;
long double mantissa;
- x = 0.0L / 0.0L;
+ x = NaNl ();
mantissa = frexpl (x, &exp);
ASSERT (isnanl (mantissa));
}
@@ -104,7 +130,7 @@ main ()
{ /* Negative zero. */
int exp = -9999;
long double mantissa;
- x = -0.0L;
+ x = minus_zero;
mantissa = frexpl (x, &exp);
ASSERT (exp == 0);
ASSERT (mantissa == x);