/* Test of splitting a 'long double' into fraction and mantissa.
- 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
+ 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 <math.h>
+#include "signature.h"
+SIGNATURE_CHECK (frexpl, long double, (long double, int *));
+
#include <float.h>
-#include <stdlib.h>
#include "fpucw.h"
#include "isnanl-nolibm.h"
-
-#define ASSERT(expr) if (!(expr)) abort ();
-
-static long double
-my_ldexp (long double x, int d)
-{
- for (; d > 0; d--)
- x *= 2.0L;
- for (; d < 0; d++)
- x *= 0.5L;
- return x;
-}
+#include "minus-zero.h"
+#include "infinity.h"
+#include "nan.h"
+#include "macros.h"
+
+/* Avoid some warnings from "gcc -Wshadow".
+ This file doesn't use the exp() function. */
+#undef exp
+#define exp exponent
+
+#undef INFINITY
+#undef NAN
+
+#define DOUBLE long double
+#define VOLATILE
+#define ISNAN isnanl
+#define INFINITY Infinityl ()
+#define NAN NaNl ()
+#define L_(literal) literal##L
+#define MINUS_ZERO minus_zerol
+#define MAX_EXP LDBL_MAX_EXP
+#define MIN_EXP LDBL_MIN_EXP
+/* 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)
+#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
+#define FREXP frexpl
+#define RANDOM randoml
+#include "test-frexp.h"
int
main ()
{
- int i;
- long double x;
DECL_LONG_DOUBLE_ROUNDING
BEGIN_LONG_DOUBLE_ROUNDING ();
- { /* NaN. */
- int exp = -9999;
- long double mantissa;
- x = 0.0L / 0.0L;
- mantissa = frexpl (x, &exp);
- ASSERT (isnanl (mantissa));
- }
-
- { /* Positive infinity. */
- int exp = -9999;
- long double mantissa;
- x = 1.0L / 0.0L;
- mantissa = frexpl (x, &exp);
- ASSERT (mantissa == x);
- }
-
- { /* Negative infinity. */
- int exp = -9999;
- long double mantissa;
- x = -1.0L / 0.0L;
- mantissa = frexpl (x, &exp);
- ASSERT (mantissa == x);
- }
-
- { /* Positive zero. */
- int exp = -9999;
- long double mantissa;
- x = 0.0L;
- mantissa = frexpl (x, &exp);
- ASSERT (exp == 0);
- ASSERT (mantissa == x);
- }
-
- { /* Negative zero. */
- int exp = -9999;
- long double mantissa;
- x = -0.0L;
- mantissa = frexpl (x, &exp);
- ASSERT (exp == 0);
- ASSERT (mantissa == x);
- }
-
- for (i = 1, x = 1.0L; i <= LDBL_MAX_EXP; i++, x *= 2.0L)
- {
- int exp = -9999;
- long double mantissa = frexpl (x, &exp);
- ASSERT (exp == i);
- ASSERT (mantissa == 0.5L);
- }
- for (i = 1, x = 1.0L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
- {
- int exp = -9999;
- long double mantissa = frexpl (x, &exp);
- ASSERT (exp == i);
- ASSERT (mantissa == 0.5L);
- }
- for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
- {
- int exp = -9999;
- long double mantissa = frexpl (x, &exp);
- ASSERT (exp == i);
- ASSERT (mantissa == 0.5L);
- }
-
- for (i = 1, x = -1.0L; i <= LDBL_MAX_EXP; i++, x *= 2.0L)
- {
- int exp = -9999;
- long double mantissa = frexpl (x, &exp);
- ASSERT (exp == i);
- ASSERT (mantissa == -0.5L);
- }
- for (i = 1, x = -1.0L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
- {
- int exp = -9999;
- long double mantissa = frexpl (x, &exp);
- ASSERT (exp == i);
- ASSERT (mantissa == -0.5L);
- }
- for (; i >= LDBL_MIN_EXP - 100 && x < 0.0L; i--, x *= 0.5L)
- {
- int exp = -9999;
- long double mantissa = frexpl (x, &exp);
- ASSERT (exp == i);
- ASSERT (mantissa == -0.5L);
- }
-
- for (i = 1, x = 1.01L; i <= LDBL_MAX_EXP; i++, x *= 2.0L)
- {
- int exp = -9999;
- long double mantissa = frexpl (x, &exp);
- ASSERT (exp == i);
- ASSERT (mantissa == 0.505L);
- }
- for (i = 1, x = 1.01L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
- {
- int exp = -9999;
- long double mantissa = frexpl (x, &exp);
- ASSERT (exp == i);
- ASSERT (mantissa == 0.505L);
- }
- for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
- {
- int exp = -9999;
- long double mantissa = frexpl (x, &exp);
- ASSERT (exp == i);
- ASSERT (mantissa >= 0.5L);
- ASSERT (mantissa < 1.0L);
- ASSERT (mantissa == my_ldexp (x, - exp));
- }
-
- for (i = 1, x = 1.73205L; i <= LDBL_MAX_EXP; i++, x *= 2.0L)
- {
- int exp = -9999;
- long double mantissa = frexpl (x, &exp);
- ASSERT (exp == i);
- ASSERT (mantissa == 0.866025L);
- }
- for (i = 1, x = 1.73205L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
- {
- int exp = -9999;
- long double mantissa = frexpl (x, &exp);
- ASSERT (exp == i);
- ASSERT (mantissa == 0.866025L);
- }
- for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
- {
- int exp = -9999;
- long double mantissa = frexpl (x, &exp);
- ASSERT (exp == i || exp == i + 1);
- ASSERT (mantissa >= 0.5L);
- ASSERT (mantissa < 1.0L);
- ASSERT (mantissa == my_ldexp (x, - exp));
- }
+ test_function ();
return 0;
}
projects / gnulib.git / blobdiff