1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
23 */
24 /*
25 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 #pragma weak __clogf = clogf
30
31 #include "libm.h"
32 #include "complex_wrapper.h"
33
34 #if defined(__i386) && !defined(__amd64)
35 extern int __swapRP(int);
36 #endif
37
38 fcomplex
39 clogf(fcomplex z) {
40 fcomplex ans;
41 float x, y, ax, ay;
42 double dx, dy;
43 int ix, iy, hx, hy;
44
45 x = F_RE(z);
46 y = F_IM(z);
47 hx = THE_WORD(x);
48 hy = THE_WORD(y);
49 ix = hx & 0x7fffffff;
50 iy = hy & 0x7fffffff;
51 ay = fabsf(y);
52 ax = fabsf(x);
53 F_IM(ans) = atan2f(y, x);
54 if (ix >= 0x7f800000 || iy >= 0x7f800000) {
55 /* x or y is Inf or NaN */
56 if (iy == 0x7f800000)
57 F_RE(ans) = ay;
58 else if (ix == 0x7f800000)
59 F_RE(ans) = ax;
60 else
61 F_RE(ans) = ax + ay;
62 } else {
63 #if defined(__i386) && !defined(__amd64)
64 int rp = __swapRP(fp_extended);
65 #endif
66 dx = (double)ax;
67 dy = (double)ay;
68 if (ix == 0x3f800000)
69 F_RE(ans) = (float)(0.5 * log1p(dy * dy));
70 else if (iy == 0x3f800000)
71 F_RE(ans) = (float)(0.5 * log1p(dx * dx));
72 else if ((ix | iy) == 0)
73 F_RE(ans) = -1.0f / ax;
74 else
75 F_RE(ans) = (float)(0.5 * log(dx * dx + dy * dy));
76 #if defined(__i386) && !defined(__amd64)
77 if (rp != fp_extended)
78 (void) __swapRP(rp);
79 #endif
80 }
81 return (ans);
82 }
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1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
24 */
25
26 /*
27 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
28 * Use is subject to license terms.
29 */
30
31 #pragma weak __clogf = clogf
32
33 #include "libm.h"
34 #include "complex_wrapper.h"
35
36 #if defined(__i386) && !defined(__amd64)
37 extern int __swapRP(int);
38 #endif
39
40 fcomplex
41 clogf(fcomplex z)
42 {
43 fcomplex ans;
44 float x, y, ax, ay;
45 double dx, dy;
46 int ix, iy, hx, hy;
47
48 x = F_RE(z);
49 y = F_IM(z);
50 hx = THE_WORD(x);
51 hy = THE_WORD(y);
52 ix = hx & 0x7fffffff;
53 iy = hy & 0x7fffffff;
54 ay = fabsf(y);
55 ax = fabsf(x);
56 F_IM(ans) = atan2f(y, x);
57
58 if (ix >= 0x7f800000 || iy >= 0x7f800000) {
59 /* x or y is Inf or NaN */
60 if (iy == 0x7f800000)
61 F_RE(ans) = ay;
62 else if (ix == 0x7f800000)
63 F_RE(ans) = ax;
64 else
65 F_RE(ans) = ax + ay;
66 } else {
67 #if defined(__i386) && !defined(__amd64)
68 int rp = __swapRP(fp_extended);
69 #endif
70 dx = (double)ax;
71 dy = (double)ay;
72
73 if (ix == 0x3f800000)
74 F_RE(ans) = (float)(0.5 * log1p(dy * dy));
75 else if (iy == 0x3f800000)
76 F_RE(ans) = (float)(0.5 * log1p(dx * dx));
77 else if ((ix | iy) == 0)
78 F_RE(ans) = -1.0f / ax;
79 else
80 F_RE(ans) = (float)(0.5 * log(dx * dx + dy * dy));
81
82 #if defined(__i386) && !defined(__amd64)
83 if (rp != fp_extended)
84 (void) __swapRP(rp);
85 #endif
86 }
87
88 return (ans);
89 }
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