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5261 libm should stop using synonyms.h
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--- old/usr/src/lib/libm/common/LD/coshl.c
+++ new/usr/src/lib/libm/common/LD/coshl.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.
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
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20 20 */
21 21
22 22 /*
23 23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
24 24 */
25 25 /*
26 26 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
27 27 * Use is subject to license terms.
28 28 */
29 29
30 -#pragma weak coshl = __coshl
30 +#pragma weak __coshl = coshl
31 31
32 32 #include "libm.h"
33 33 #include "longdouble.h"
34 34
35 35 /*
36 36 * COSH(X)
37 37 * RETURN THE HYPERBOLIC COSINE OF X
38 38 *
39 39 * Method :
40 40 * 1. Replace x by |x| (COSH(x) = COSH(-x)).
41 41 * 2.
42 42 * [ EXP(x) - 1 ]^2
43 43 * 0 <= x <= 0.3465 : COSH(x) := 1 + -------------------
44 44 * 2*EXP(x)
45 45 *
46 46 * EXP(x) + 1/EXP(x)
47 47 * 0.3465 <= x <= thresh : COSH(x) := -------------------
48 48 * 2
49 49 * thresh <= x <= lnovft : COSH(x) := EXP(x)/2
50 50 * lnovft <= x < INF : COSH(x) := SCALBN(EXP(x-MEP1*ln2),ME)
51 51 *
52 52 *
53 53 * here
54 54 * 0.3465 a number that is near one half of ln2.
55 55 * thresh a number such that
56 56 * EXP(thresh)+EXP(-thresh)=EXP(thresh)
57 57 * lnovft logarithm of the overflow threshold
58 58 * = MEP1*ln2 chopped to machine precision.
59 59 * ME maximum exponent
60 60 * MEP1 maximum exponent plus 1
61 61 *
62 62 * Special cases:
63 63 * COSH(x) is |x| if x is +INF, -INF, or NaN.
64 64 * only COSH(0)=1 is exact for finite x.
65 65 */
66 66
67 67 static const long double C[] = {
68 68 0.5L,
69 69 1.0L,
70 70 0.3465L,
71 71 45.0L,
72 72 1.135652340629414394879149e+04L,
73 73 7.004447686242549087858985e-16L,
74 74 2.710505431213761085018632e-20L, /* 2^-65 */
75 75 };
76 76
77 77 #define half C[0]
78 78 #define one C[1]
79 79 #define thr1 C[2]
80 80 #define thr2 C[3]
81 81 #define lnovft C[4]
82 82 #define lnovlo C[5]
83 83 #define tinyl C[6]
84 84
85 85 long double
86 86 coshl(long double x) {
87 87 long double w, t;
88 88
89 89 w = fabsl(x);
90 90 if (!finitel(w))
91 91 return (w + w); /* x is INF or NaN */
92 92 if (w < thr1) {
93 93 if (w < tinyl)
94 94 return (one + w); /* inexact+directed rounding */
95 95 t = expm1l(w);
96 96 w = one + t;
97 97 w = one + (t * t) / (w + w);
98 98 return (w);
99 99 }
100 100 if (w < thr2) {
101 101 t = expl(w);
102 102 return (half * (t + one / t));
103 103 }
104 104 if (w <= lnovft)
105 105 return (half * expl(w));
106 106 return (scalbnl(expl((w - lnovft) - lnovlo), 16383));
107 107 }
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