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
58
59
60
61
62
63
64
65
66
67
|
/* w_powl.c -- long double version of w_pow.c.
* Conversion to long double by Ulrich Drepper,
* Cygnus Support, drepper@cygnus.com.
*/
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
/*
* wrapper powl(x,y) return x**y
*/
#include "math.h"
#include "math_private.h"
#ifdef __STDC__
long double __powl(long double x, long double y)/* wrapper powl */
#else
long double __powl(x,y) /* wrapper powl */
long double x,y;
#endif
{
#ifdef _IEEE_LIBM
return __ieee754_powl(x,y);
#else
long double z;
z=__ieee754_powl(x,y);
if(_LIB_VERSION == _IEEE_|| __isnanl(y)) return z;
if(__isnanl(x)) {
if(y==0.0)
return __kernel_standard(x,y,242); /* pow(NaN,0.0) */
else
return z;
}
if(x==0.0){
if(y==0.0)
return __kernel_standard(x,y,220); /* pow(0.0,0.0) */
if(__finite(y)&&y<0.0)
if (signbit (x) && signbit (z))
return __kernel_standard(x,y,223); /* pow(-0.0,negative) */
else
return __kernel_standard(x,y,243); /* pow(+0.0,negative) */
return z;
}
if(!__finitel(z)) {
if(__finitel(x)&&__finitel(y)) {
if(__isnanl(z))
return __kernel_standard(x,y,224); /* pow neg**non-int */
else
return __kernel_standard(x,y,221); /* pow overflow */
}
}
if(z==0.0&&__finitel(x)&&__finitel(y))
return __kernel_standard(x,y,222); /* pow underflow */
return z;
#endif
}
weak_alias (__powl, powl)
|
