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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "@(#)cexpl.c 1.3 06/01/31 SMI"
#pragma weak cexpl = __cexpl
#include "libm.h" /* expl/isinfl/iszerol/scalbnl/sincosl */
#include "complex_wrapper.h"
/* INDENT OFF */
static const long double zero = 0.0L;
/* INDENT ON */
ldcomplex
cexpl(ldcomplex z) {
ldcomplex ans;
long double x, y, t, c, s;
int n, ix, iy, hx, hy;
x = LD_RE(z);
y = LD_IM(z);
hx = HI_XWORD(x);
hy = HI_XWORD(y);
ix = hx & 0x7fffffff;
iy = hy & 0x7fffffff;
if (iszerol(y)) { /* y = 0 */
LD_RE(ans) = expl(x);
LD_IM(ans) = y;
} else if (isinfl(x)) { /* x is +-inf */
if (hx < 0) {
if (iy >= 0x7fff0000) {
LD_RE(ans) = zero;
LD_IM(ans) = zero;
} else {
sincosl(y, &s, &c);
LD_RE(ans) = zero * c;
LD_IM(ans) = zero * s;
}
} else {
if (iy >= 0x7fff0000) {
LD_RE(ans) = x;
LD_IM(ans) = y - y;
} else {
(void) sincosl(y, &s, &c);
LD_RE(ans) = x * c;
LD_IM(ans) = x * s;
}
}
} else {
(void) sincosl(y, &s, &c);
if (ix >= 0x400C62E4) { /* |x| > 11356.52... ~ log(2**16384) */
t = __k_cexpl(x, &n);
LD_RE(ans) = scalbnl(t * c, n);
LD_IM(ans) = scalbnl(t * s, n);
} else {
t = expl(x);
LD_RE(ans) = t * c;
LD_IM(ans) = t * s;
}
}
return (ans);
}
|
