blob: 960f2167ca1e91e55befff3e8ffcaa806f5f90e3 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/* Test for powl
Copyright (C) 2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdio.h>
#include <math.h>
#include <float.h>
#include <ieee754.h>
int
main (void)
{
int result = 0;
#ifndef NO_LONG_DOUBLE
# if LDBL_MANT_DIG == 64
{
long double x = 1e-20;
union ieee854_long_double u;
u.ieee.mantissa0 = 1;
u.ieee.mantissa1 = 1;
u.ieee.exponent = 0;
u.ieee.negative = 0;
(void) powl (0.2, u.d);
x = powl (x, 1.5);
if (fabsl (x - 1e-30) > 1e-10)
{
printf ("powl (1e-20, 1.5): wrong result: %Lg\n", x);
result = 1;
}
}
# endif
#endif
return result;
}
|
