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11210 libm should be cstyle(1ONBLD) clean
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--- old/usr/src/lib/libm/common/LD/sinpil.c
+++ new/usr/src/lib/libm/common/LD/sinpil.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 -/* long double sinpil(long double x),
31 +/* BEGIN CSTYLED */
32 +/*
33 + * long double sinpil(long double x),
31 34 * return long double precision sinl(pi*x).
32 35 *
33 36 * Algorithm, 10/17/2002, K.C. Ng
34 37 * ------------------------------
35 38 * Let y = |4x|, z = floor(y), and n = (int)(z mod 8.0) (displayed in binary).
36 39 * 1. If y == z, then x is a multiple of pi/4. Return the following values:
37 40 * ---------------------------------------------------
38 41 * n x mod 2 sin(x*pi) cos(x*pi) tan(x*pi)
39 42 * ---------------------------------------------------
40 43 * 000 0.00 +0 ___ +1 ___ +0
41 44 * 001 0.25 +\/0.5 +\/0.5 +1
42 45 * 010 0.50 +1 ___ +0 ___ +inf
43 46 * 011 0.75 +\/0.5 -\/0.5 -1
44 47 * 100 1.00 -0 ___ -1 ___ +0
45 48 * 101 1.25 -\/0.5 -\/0.5 +1
46 49 * 110 1.50 -1 ___ -0 ___ +inf
47 50 * 111 1.75 -\/0.5 +\/0.5 -1
48 51 * ---------------------------------------------------
49 52 * 2. Otherwise,
50 53 * ---------------------------------------------------
51 54 * n t sin(x*pi) cos(x*pi) tan(x*pi)
52 55 * ---------------------------------------------------
53 56 * 000 (y-z)/4 sinpi(t) cospi(t) tanpi(t)
54 57 * 001 (z+1-y)/4 cospi(t) sinpi(t) 1/tanpi(t)
55 58 * 010 (y-z)/4 cospi(t) -sinpi(t) -1/tanpi(t)
56 59 * 011 (z+1-y)/4 sinpi(t) -cospi(t) -tanpi(t)
57 60 * 100 (y-z)/4 -sinpi(t) -cospi(t) tanpi(t)
58 61 * 101 (z+1-y)/4 -cospi(t) -sinpi(t) 1/tanpi(t)
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59 62 * 110 (y-z)/4 -cospi(t) sinpi(t) -1/tanpi(t)
60 63 * 111 (z+1-y)/4 -sinpi(t) cospi(t) -tanpi(t)
61 64 * ---------------------------------------------------
62 65 *
63 66 * NOTE. This program compute sinpi/cospi(t<0.25) by __k_sin/cos(pi*t, 0.0).
64 67 * This will return a result with error slightly more than one ulp (but less
65 68 * than 2 ulp). If one wants accurate result, one may break up pi*t in
66 69 * high (tpi_h) and low (tpi_l) parts and call __k_sin/cos(tip_h, tip_lo)
67 70 * instead.
68 71 */
72 +/* END CSTYLED */
69 73
70 74 #include "libm.h"
71 75 #include "longdouble.h"
72 76
73 77 #include <sys/isa_defs.h>
74 78
75 -#define I(q, m) ((int *) &(q))[m]
76 -#define U(q, m) ((unsigned *) &(q))[m]
79 +#define I(q, m) ((int *)&(q))[m]
80 +#define U(q, m) ((unsigned *)&(q))[m]
77 81 #if defined(__i386) || defined(__amd64)
78 -#define LDBL_MOST_SIGNIF_I(ld) ((I(ld, 2) << 16) | (0xffff & (I(ld, 1) >> 15)))
79 -#define LDBL_LEAST_SIGNIF_U(ld) U(ld, 0)
80 -#define PREC 64
81 -#define PRECM1 63
82 -#define PRECM2 62
82 +#define LDBL_MOST_SIGNIF_I(ld) ((I(ld, 2) << 16) | (0xffff & (I(ld, \
83 + 1) >> 15)))
84 +#define LDBL_LEAST_SIGNIF_U(ld) U(ld, 0)
85 +#define PREC 64
86 +#define PRECM1 63
87 +#define PRECM2 62
88 +
83 89 static const long double twoPRECM2 = 9.223372036854775808000000000000000e+18L;
84 90 #else
85 -#define LDBL_MOST_SIGNIF_I(ld) I(ld, 0)
86 -#define LDBL_LEAST_SIGNIF_U(ld) U(ld, sizeof(long double) / sizeof(int) - 1)
87 -#define PREC 113
88 -#define PRECM1 112
89 -#define PRECM2 111
91 +#define LDBL_MOST_SIGNIF_I(ld) I(ld, 0)
92 +#define LDBL_LEAST_SIGNIF_U(ld) U(ld, sizeof (long double) / \
93 + sizeof (int) - 1)
94 +#define PREC 113
95 +#define PRECM1 112
96 +#define PRECM2 111
97 +
90 98 static const long double twoPRECM2 = 5.192296858534827628530496329220096e+33L;
91 99 #endif
92 100
93 -static const long double
94 -zero = 0.0L,
95 -quater = 0.25L,
96 -one = 1.0L,
97 -pi = 3.141592653589793238462643383279502884197e+0000L,
98 -sqrth = 0.707106781186547524400844362104849039284835937688474,
99 -tiny = 1.0e-100;
101 +static const long double zero = 0.0L,
102 + quater = 0.25L,
103 + one = 1.0L,
104 + pi = 3.141592653589793238462643383279502884197e+0000L,
105 + sqrth = 0.707106781186547524400844362104849039284835937688474,
106 + tiny = 1.0e-100;
100 107
101 108 long double
102 -sinpil(long double x) {
109 +sinpil(long double x)
110 +{
103 111 long double y, z, t;
104 112 int hx, n, k;
105 113 unsigned lx;
106 114
107 115 hx = LDBL_MOST_SIGNIF_I(x);
108 116 lx = LDBL_LEAST_SIGNIF_U(x);
109 117 k = ((hx & 0x7fff0000) >> 16) - 0x3fff;
118 +
110 119 if (k >= PRECM2) { /* |x| >= 2**(Prec-2) */
111 - if (k >= 16384)
120 + if (k >= 16384) {
112 121 y = x - x;
113 - else {
114 - if (k >= PREC)
122 + } else {
123 + if (k >= PREC) {
115 124 y = zero;
116 - else if (k == PRECM1)
117 - y = (lx & 1) == 0 ? zero: -zero;
118 - else { /* k = Prec - 2 */
125 + } else if (k == PRECM1) {
126 + y = (lx & 1) == 0 ? zero : -zero;
127 + } else { /* k = Prec - 2 */
119 128 y = (lx & 1) == 0 ? zero : one;
129 +
120 130 if ((lx & 2) != 0)
121 131 y = -y;
122 132 }
123 133 }
124 - }
125 - else if (k < -2) /* |x| < 0.25 */
134 + } else if (k < -2) { /* |x| < 0.25 */
126 135 y = __k_sinl(pi * fabsl(x), zero);
127 - else {
136 + } else {
128 137 /* y = |4x|, z = floor(y), and n = (int)(z mod 8.0) */
129 138 y = 4.0L * fabsl(x);
139 +
130 140 if (k < PRECM2) {
131 141 z = y + twoPRECM2;
132 142 n = LDBL_LEAST_SIGNIF_U(z) & 7; /* 3 LSb of z */
133 143 t = z - twoPRECM2;
134 144 k = 0;
135 - if (t == y)
145 +
146 + if (t == y) {
136 147 k = 1;
137 - else if (t > y) {
148 + } else if (t > y) {
138 149 n -= 1;
139 150 t = quater + (y - t) * quater;
140 - }
141 - else
151 + } else {
142 152 t = (y - t) * quater;
143 - }
144 - else { /* k = Prec-3 */
153 + }
154 + } else { /* k = Prec-3 */
145 155 n = LDBL_LEAST_SIGNIF_U(y) & 7; /* 3 LSb of z */
146 156 k = 1;
147 157 }
148 - if (k) { /* x = N/4 */
158 +
159 + if (k) { /* x = N/4 */
149 160 if ((n & 1) != 0)
150 161 y = sqrth + tiny;
151 162 else
152 163 y = (n & 2) == 0 ? zero : one;
164 +
153 165 if ((n & 4) != 0)
154 166 y = -y;
155 - }
156 - else {
167 + } else {
157 168 if ((n & 1) != 0)
158 169 t = quater - t;
170 +
159 171 if (((n + (n & 1)) & 2) == 0)
160 172 y = __k_sinl(pi * t, zero);
161 173 else
162 174 y = __k_cosl(pi * t, zero);
175 +
163 176 if ((n & 4) != 0)
164 177 y = -y;
165 178 }
166 179 }
167 - return hx >= 0 ? y : -y;
180 +
181 + return (hx >= 0 ? y : -y);
168 182 }
183 +
169 184 #undef U
170 185 #undef LDBL_LEAST_SIGNIF_U
171 186 #undef I
172 187 #undef LDBL_MOST_SIGNIF_I
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