/* Test of splitting a 'long double' into fraction and mantissa.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007-2013 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
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 <http://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
#include "printf-frexpl.h"
#include <float.h>
-#include <stdlib.h>
#include "fpucw.h"
-
-#define ASSERT(expr) if (!(expr)) abort ();
+#include "macros.h"
+
+/* On MIPS IRIX machines, LDBL_MIN_EXP is -1021, but the smallest reliable
+ 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)
+# define MIN_SUBNORMAL_EXP MIN_NORMAL_EXP
+#elif defined __ppc || defined __ppc__ || defined __powerpc || defined __powerpc__
+# define MIN_NORMAL_EXP (LDBL_MIN_EXP + 53)
+# define MIN_SUBNORMAL_EXP MIN_NORMAL_EXP
+#else
+# define MIN_NORMAL_EXP LDBL_MIN_EXP
+# define MIN_SUBNORMAL_EXP (LDBL_MIN_EXP - 100)
+#endif
static long double
my_ldexp (long double x, int d)
ASSERT (exp == i - 1);
ASSERT (mantissa == 1.0L);
}
- for (i = 1, x = 1.0L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
+ for (i = 1, x = 1.0L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
{
int exp = -9999;
long double mantissa = printf_frexpl (x, &exp);
ASSERT (exp == i - 1);
ASSERT (mantissa == 1.0L);
}
- for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
+ for (; i >= MIN_SUBNORMAL_EXP && x > 0.0L; i--, x *= 0.5L)
{
int exp = -9999;
long double mantissa = printf_frexpl (x, &exp);
ASSERT (exp == i - 1);
ASSERT (mantissa == 1.01L);
}
- for (i = 1, x = 1.01L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
+ for (i = 1, x = 1.01L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
{
int exp = -9999;
long double mantissa = printf_frexpl (x, &exp);
ASSERT (exp == i - 1);
ASSERT (mantissa == 1.01L);
}
- for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
+ for (; i >= MIN_SUBNORMAL_EXP && x > 0.0L; i--, x *= 0.5L)
{
int exp = -9999;
long double mantissa = printf_frexpl (x, &exp);
ASSERT (exp == i - 1);
ASSERT (mantissa == 1.73205L);
}
- for (i = 1, x = 1.73205L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
+ for (i = 1, x = 1.73205L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
{
int exp = -9999;
long double mantissa = printf_frexpl (x, &exp);
ASSERT (exp == i - 1);
ASSERT (mantissa == 1.73205L);
}
- for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
+ for (; i >= MIN_SUBNORMAL_EXP && x > 0.0L; i--, x *= 0.5L)
{
int exp = -9999;
long double mantissa = printf_frexpl (x, &exp);