Print this page
11210 libm should be cstyle(1ONBLD) clean
| Split |
Close |
| Expand all |
| Collapse all |
--- old/usr/src/lib/libm/common/R/__sinf.c
+++ new/usr/src/lib/libm/common/R/__sinf.c
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
↓ open down ↓ |
14 lines elided |
↑ open up ↑ |
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21
22 22 /*
23 23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
24 24 */
25 +
25 26 /*
26 27 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
27 28 * Use is subject to license terms.
28 29 */
29 30
30 31 #include "libm.h"
31 32
32 -/* INDENT OFF */
33 +
33 34 /*
34 35 * float __k_sin(double x);
35 36 * kernel (float) sin function on [-pi/4, pi/4], pi/4 ~ 0.785398164
36 37 * Input x is in double and assumed to be bounded by ~pi/4 in magnitude.
37 38 *
38 39 * Method: Let z = x * x, then
39 40 * S(x) = x(S0 + S1*z)(S2 + S3*z + z*z)
40 41 * where
41 42 * S0 = 1.85735322054308378716204874632872525989806770558e-0003,
42 43 * S1 = -1.95035094218403635082921458859320791358115801259e-0004,
43 44 * S2 = 5.38400550766074785970952495168558701485841707252e+0002,
|
↓ open down ↓ |
1 lines elided |
↑ open up ↑ |
44 45 * S3 = -3.31975110777873728964197739157371509422022905947e+0001,
45 46 *
46 47 * The remez error is bound by |(sin(x) - S(x))/x| < 2**(-28.2)
47 48 *
48 49 * Constants:
49 50 * The hexadecimal values are the intended ones for the following constants.
50 51 * The decimal values may be used, provided that the compiler will convert
51 52 * from decimal to binary accurately enough to produce the hexadecimal values
52 53 * shown.
53 54 */
54 -/* INDENT ON */
55 55
56 56 static const double q[] = {
57 -/* S0 = */ 1.85735322054308378716204874632872525989806770558e-0003,
57 +/* S0 = */
58 + 1.85735322054308378716204874632872525989806770558e-0003,
58 59 /* S1 = */ -1.95035094218403635082921458859320791358115801259e-0004,
59 -/* S2 = */ 5.38400550766074785970952495168558701485841707252e+0002,
60 -/* S3 = */ -3.31975110777873728964197739157371509422022905947e+0001,
61 -};
62 -
63 -#define S0 q[0]
64 -#define S1 q[1]
65 -#define S2 q[2]
66 -#define S3 q[3]
60 +/* S2 = */ 5.38400550766074785970952495168558701485841707252e+0002,
61 +/* S3 = */ -3.31975110777873728964197739157371509422022905947e+0001, };
62 +
63 +#define S0 q[0]
64 +#define S1 q[1]
65 +#define S2 q[2]
66 +#define S3 q[3]
67 67
68 68 float
69 -__k_sinf(double x) {
69 +__k_sinf(double x)
70 +{
70 71 float ft;
71 72 double z;
72 73 int hx;
73 74
74 - hx = ((int *) &x)[HIWORD]; /* hx = leading x */
75 + hx = ((int *)&x)[HIWORD]; /* hx = leading x */
76 +
75 77 if ((hx & ~0x80000000) < 0x3f100000) { /* if |x| < 2**-14 */
76 - ft = (float) x;
77 - if ((int) x == 0) /* raise inexact if x != 0 */
78 + ft = (float)x;
79 +
80 + if ((int)x == 0) /* raise inexact if x != 0 */
78 81 return (ft);
79 82 }
83 +
80 84 z = x * x;
81 - ft = (float) ((x * (S0 + z * S1)) * (S2 + z * (S3 + z)));
85 + ft = (float)((x * (S0 + z * S1)) * (S2 + z * (S3 + z)));
82 86 return (ft);
83 87 }
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX