File: test-powl.c

package info (click to toggle)
glibc 2.19-13
  • links: PTS, VCS
  • area: main
  • in suites: jessie, jessie-kfreebsd
  • size: 202,472 kB
  • ctags: 140,344
  • sloc: ansic: 969,274; asm: 241,208; sh: 10,047; makefile: 8,467; cpp: 3,595; perl: 2,077; pascal: 1,839; awk: 1,704; yacc: 317; sed: 73
file content (50 lines) | stat: -rw-r--r-- 1,360 bytes parent folder | download | duplicates (10)
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
/* Test for powl
   Copyright (C) 2011-2014 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, see
   <http://www.gnu.org/licenses/>.  */

#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;
}