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11210 libm should be cstyle(1ONBLD) clean
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--- old/usr/src/lib/libm/common/C/acos.c
+++ new/usr/src/lib/libm/common/C/acos.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.
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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 #pragma weak __acos = acos
31 32
32 -/* INDENT OFF */
33 +
33 34 /*
34 35 * acos(x)
35 36 * Method :
36 37 * acos(x) = pi/2 - asin(x)
37 38 * acos(-x) = pi/2 + asin(x)
38 39 * For |x|<=0.5
39 40 * acos(x) = pi/2 - (x + x*x^2*R(x^2)) (see asin.c)
40 41 * For x>0.5
41 - * acos(x) = pi/2 - (pi/2 - 2asin(sqrt((1-x)/2)))
42 + * acos(x) = pi/2 - (pi/2 - 2asin(sqrt((1-x)/2)))
42 43 * = 2asin(sqrt((1-x)/2))
43 - * = 2s + 2s*z*R(z) ...z=(1-x)/2, s=sqrt(z)
44 + * = 2s + 2s*z*R(z) ...z=(1-x)/2, s=sqrt(z)
44 45 * = 2f + (2c + 2s*z*R(z))
45 46 * where f=hi part of s, and c = (z-f*f)/(s+f) is the correction term
46 47 * for f so that f+c ~ sqrt(z).
47 48 * For x<-0.5
48 49 * acos(x) = pi - 2asin(sqrt((1-|x|)/2))
49 50 * = pi - 0.5*(s+s*z*R(z)), where z=(1-|x|)/2,s=sqrt(z)
50 51 *
51 52 * Special cases:
52 53 * if x is NaN, return x itself;
53 54 * if |x|>1, return NaN with invalid signal.
54 55 *
55 56 * Function needed: sqrt
56 57 */
57 -/* INDENT ON */
58 58
59 -#include "libm_protos.h" /* _SVID_libm_error */
59 +#include "libm_protos.h" /* _SVID_libm_error */
60 60 #include "libm_macros.h"
61 61 #include <math.h>
62 62
63 -/* INDENT OFF */
64 63 static const double xxx[] = {
65 -/* one */ 1.00000000000000000000e+00, /* 3FF00000, 00000000 */
66 -/* pi */ 3.14159265358979311600e+00, /* 400921FB, 54442D18 */
67 -/* pio2_hi */ 1.57079632679489655800e+00, /* 3FF921FB, 54442D18 */
68 -/* pio2_lo */ 6.12323399573676603587e-17, /* 3C91A626, 33145C07 */
69 -/* pS0 */ 1.66666666666666657415e-01, /* 3FC55555, 55555555 */
70 -/* pS1 */ -3.25565818622400915405e-01, /* BFD4D612, 03EB6F7D */
71 -/* pS2 */ 2.01212532134862925881e-01, /* 3FC9C155, 0E884455 */
72 -/* pS3 */ -4.00555345006794114027e-02, /* BFA48228, B5688F3B */
73 -/* pS4 */ 7.91534994289814532176e-04, /* 3F49EFE0, 7501B288 */
74 -/* pS5 */ 3.47933107596021167570e-05, /* 3F023DE1, 0DFDF709 */
75 -/* qS1 */ -2.40339491173441421878e+00, /* C0033A27, 1C8A2D4B */
76 -/* qS2 */ 2.02094576023350569471e+00, /* 40002AE5, 9C598AC8 */
77 -/* qS3 */ -6.88283971605453293030e-01, /* BFE6066C, 1B8D0159 */
78 -/* qS4 */ 7.70381505559019352791e-02 /* 3FB3B8C5, B12E9282 */
64 +/* one */
65 + 1.00000000000000000000e+00, /* 3FF00000, 00000000 */
66 +/* pi */ 3.14159265358979311600e+00, /* 400921FB, 54442D18 */
67 +/* pio2_hi */ 1.57079632679489655800e+00, /* 3FF921FB, 54442D18 */
68 +/* pio2_lo */ 6.12323399573676603587e-17, /* 3C91A626, 33145C07 */
69 +/* pS0 */ 1.66666666666666657415e-01, /* 3FC55555, 55555555 */
70 +/* pS1 */ -3.25565818622400915405e-01, /* BFD4D612, 03EB6F7D */
71 +/* pS2 */ 2.01212532134862925881e-01, /* 3FC9C155, 0E884455 */
72 +/* pS3 */ -4.00555345006794114027e-02, /* BFA48228, B5688F3B */
73 +/* pS4 */ 7.91534994289814532176e-04, /* 3F49EFE0, 7501B288 */
74 +/* pS5 */ 3.47933107596021167570e-05, /* 3F023DE1, 0DFDF709 */
75 +/* qS1 */ -2.40339491173441421878e+00, /* C0033A27, 1C8A2D4B */
76 +/* qS2 */ 2.02094576023350569471e+00, /* 40002AE5, 9C598AC8 */
77 +/* qS3 */ -6.88283971605453293030e-01, /* BFE6066C, 1B8D0159 */
78 +/* qS4 */ 7.70381505559019352791e-02 /* 3FB3B8C5, B12E9282 */
79 79 };
80 -#define one xxx[0]
81 -#define pi xxx[1]
82 -#define pio2_hi xxx[2]
83 -#define pio2_lo xxx[3]
84 -#define pS0 xxx[4]
85 -#define pS1 xxx[5]
86 -#define pS2 xxx[6]
87 -#define pS3 xxx[7]
88 -#define pS4 xxx[8]
89 -#define pS5 xxx[9]
90 -#define qS1 xxx[10]
91 -#define qS2 xxx[11]
92 -#define qS3 xxx[12]
93 -#define qS4 xxx[13]
94 -/* INDENT ON */
80 +
81 +#define one xxx[0]
82 +#define pi xxx[1]
83 +#define pio2_hi xxx[2]
84 +#define pio2_lo xxx[3]
85 +#define pS0 xxx[4]
86 +#define pS1 xxx[5]
87 +#define pS2 xxx[6]
88 +#define pS3 xxx[7]
89 +#define pS4 xxx[8]
90 +#define pS5 xxx[9]
91 +#define qS1 xxx[10]
92 +#define qS2 xxx[11]
93 +#define qS3 xxx[12]
94 +#define qS4 xxx[13]
95 95
96 96 double
97 -acos(double x) {
97 +acos(double x)
98 +{
98 99 double z, p, q, r, w, s, c, df;
99 100 int hx, ix;
100 101
101 - hx = ((int *) &x)[HIWORD];
102 + hx = ((int *)&x)[HIWORD];
102 103 ix = hx & 0x7fffffff;
103 - if (ix >= 0x3ff00000) { /* |x| >= 1 */
104 - if (((ix - 0x3ff00000) | ((int *) &x)[LOWORD]) == 0) {
104 +
105 + if (ix >= 0x3ff00000) { /* |x| >= 1 */
106 + if (((ix - 0x3ff00000) | ((int *)&x)[LOWORD]) == 0) {
105 107 /* |x| == 1 */
106 108 if (hx > 0) /* acos(1) = 0 */
107 109 return (0.0);
108 110 else /* acos(-1) = pi */
109 111 return (pi + 2.0 * pio2_lo);
110 - } else if (isnan(x))
112 + } else if (isnan(x)) {
111 113 #if defined(FPADD_TRAPS_INCOMPLETE_ON_NAN)
112 114 return (ix >= 0x7ff80000 ? x : (x - x) / (x - x));
113 - /* assumes sparc-like QNaN */
115 + /* assumes sparc-like QNaN */
114 116 #else
115 - return (x - x) / (x - x); /* acos(|x|>1) is NaN */
117 + return ((x - x) / (x - x)); /* acos(|x|>1) is NaN */
116 118 #endif
117 - else
119 + } else {
118 120 return (_SVID_libm_err(x, x, 1));
121 + }
119 122 }
120 - if (ix < 0x3fe00000) { /* |x| < 0.5 */
123 +
124 + if (ix < 0x3fe00000) { /* |x| < 0.5 */
121 125 if (ix <= 0x3c600000)
122 126 return (pio2_hi + pio2_lo); /* if |x| < 2**-57 */
127 +
123 128 z = x * x;
124 - p = z * (pS0 + z * (pS1 + z * (pS2 + z * (pS3 +
125 - z * (pS4 + z * pS5)))));
129 + p = z * (pS0 + z * (pS1 + z * (pS2 + z * (pS3 + z * (pS4 + z *
130 + pS5)))));
126 131 q = one + z * (qS1 + z * (qS2 + z * (qS3 + z * qS4)));
127 132 r = p / q;
128 133 return (pio2_hi - (x - (pio2_lo - x * r)));
129 134 } else if (hx < 0) {
130 135 /* x < -0.5 */
131 136 z = (one + x) * 0.5;
132 - p = z * (pS0 + z * (pS1 + z * (pS2 + z * (pS3 +
133 - z * (pS4 + z * pS5)))));
137 + p = z * (pS0 + z * (pS1 + z * (pS2 + z * (pS3 + z * (pS4 + z *
138 + pS5)))));
134 139 q = one + z * (qS1 + z * (qS2 + z * (qS3 + z * qS4)));
135 140 s = sqrt(z);
136 141 r = p / q;
137 142 w = r * s - pio2_lo;
138 143 return (pi - 2.0 * (s + w));
139 144 } else {
140 145 /* x > 0.5 */
141 146 z = (one - x) * 0.5;
142 147 s = sqrt(z);
143 148 df = s;
144 - ((int *) &df)[LOWORD] = 0;
149 + ((int *)&df)[LOWORD] = 0;
145 150 c = (z - df * df) / (s + df);
146 - p = z * (pS0 + z * (pS1 + z * (pS2 + z * (pS3 +
147 - z * (pS4 + z * pS5)))));
151 + p = z * (pS0 + z * (pS1 + z * (pS2 + z * (pS3 + z * (pS4 + z *
152 + pS5)))));
148 153 q = one + z * (qS1 + z * (qS2 + z * (qS3 + z * qS4)));
149 154 r = p / q;
150 155 w = r * s + c;
151 156 return (2.0 * (df + w));
152 157 }
153 158 }
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