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
52
53
54
55
56
57
|
/* Compute the quantum exponend of a finite argument.
Copyright (C) 2014-2015 Free Software Foundation, Inc.
This file is part of the Decimal Floating Point C Library.
The Decimal Floating Point C Library is free software; you can
redistribute it and/or modify it under the terms of the GNU Lesser
General Public License version 2.1.
The Decimal Floating Point 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 version 2.1 for more details.
You should have received a copy of the GNU Lesser General Public
License version 2.1 along with the Decimal Floating Point C Library;
if not, write to the Free Software Foundation, Inc., 59 Temple Place,
Suite 330, Boston, MA 02111-1307 USA.
Please see libdfp/COPYING.txt for more information. */
#include <decimal128.h>
#include <decContext.h>
#include <decNumber.h>
#include <math.h>
#define _DECIMAL_SIZE 128
#include <dfpmacro.h>
_Decimal128
__quantumd128 (_Decimal128 x)
{
decNumber dn_x;
decNumber dn_result;
decContext context;
_Decimal128 result;
FUNC_CONVERT_TO_DN (&x, &dn_x);
if (decNumberIsNaN (&dn_x) || decNumberIsZero (&dn_x))
return x;
if (decNumberIsInfinite (&dn_x))
return DEC_INFINITY;
/* The quantum of a finite number is defined as 1 x 10^exponent, so
first get input absolute value and then sets its coefficient to 1. */
decContextDefault (&context, DEFAULT_CONTEXT);
decNumberAbs (&dn_result, &dn_x, &context);
dn_result.digits = 1;
dn_result.lsu[0] = 1;
FUNC_CONVERT_FROM_DN (&dn_result, &result, &context);
return result;
}
weak_alias (__quantumd128, quantumd128)
|
