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5262 libm needs to be carefully unifdef'd
5268 libm doesn't need to hide symbols which are already local
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--- old/usr/src/lib/libm/common/Q/asinl.c
+++ new/usr/src/lib/libm/common/Q/asinl.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 -#if defined(ELFOBJ)
31 30 #pragma weak asinl = __asinl
32 -#endif
33 31
34 32 /*
35 33 * asinl(x) = atan2l(x,sqrt(1-x*x));
36 34 *
37 35 * For better accuracy, 1-x*x is computed as follows
38 36 * 1-x*x if x < 0.5,
39 37 * 2*(1-|x|)-(1-|x|)*(1-|x|) if x >= 0.5.
40 38 *
41 39 * Special cases:
42 40 * if x is NaN, return x itself;
43 41 * if |x|>1, return NaN with invalid signal.
44 42 */
45 43
46 44 #include "libm.h"
47 45
48 46 static const long double zero = 0.0L, small = 1.0e-20L, half = 0.5L, one = 1.0L;
49 47 #ifndef lint
50 48 static const long double big = 1.0e+20L;
51 49 #endif
52 50
53 51 long double
54 52 asinl(long double x) {
55 53 long double t, w;
56 54 volatile long double dummy;
57 55
58 56 w = fabsl(x);
59 57 if (isnanl(x))
60 58 return (x + x);
61 59 else if (w <= half) {
62 60 if (w < small) {
63 61 #ifndef lint
64 62 dummy = w + big;
65 63 /* inexact if w != 0 */
66 64 #endif
67 65 return (x);
68 66 } else
69 67 return (atanl(x / sqrtl(one - x * x)));
70 68 } else if (w < one) {
71 69 t = one - w;
72 70 w = t + t;
73 71 return (atanl(x / sqrtl(w - t * t)));
74 72 } else if (w == one)
75 73 return (atan2l(x, zero)); /* asin(+-1) = +- PI/2 */
76 74 else
77 75 return (zero / zero); /* |x| > 1: invalid */
78 76 }
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