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5261 libm should stop using synonyms.h
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--- old/usr/src/lib/libm/common/complex/cexp.c
+++ new/usr/src/lib/libm/common/complex/cexp.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 cexp = __cexp
30 +#pragma weak __cexp = cexp
31 31
32 32 /* INDENT OFF */
33 33 /*
34 34 * dcomplex cexp(dcomplex z);
35 35 *
36 36 * x+iy x
37 37 * e = e (cos(y)+i*sin(y))
38 38 *
39 39 * Over/underflow issue
40 40 * --------------------
41 41 * exp(x) may be huge but cos(y) or sin(y) may be tiny. So we use
42 42 * function __k_cexp(x,&n) to return exp(x) = __k_cexp(x,&n)*2**n.
43 43 * Thus if exp(x+iy) = A + Bi and t = __k_cexp(x,&n), then
44 44 * A = t*cos(y)*2**n, B = t*sin(y)*2**n
45 45 *
46 46 * Purge off all exceptional arguments:
47 47 * (x,0) --> (exp(x),0) for all x, include inf and NaN
48 48 * (+inf, y) --> (+inf, NaN) for inf, nan
49 49 * (-inf, y) --> (+-0, +-0) for y = inf, nan
50 50 * (x,+-inf/NaN) --> (NaN,NaN) for finite x
51 51 * For all other cases, return
52 52 * (x,y) --> exp(x)*cos(y)+i*exp(x)*sin(y))
53 53 *
54 54 * Algorithm for out of range x and finite y
55 55 * 1. compute exp(x) in factor form (t=__k_cexp(x,&n))*2**n
56 56 * 2. compute sincos(y,&s,&c)
57 57 * 3. compute t*s+i*(t*c), then scale back to 2**n and return.
58 58 */
59 59 /* INDENT ON */
60 60
61 61 #include "libm.h" /* exp/scalbn/sincos/__k_cexp */
62 62 #include "complex_wrapper.h"
63 63
64 64 static const double zero = 0.0;
65 65
66 66 dcomplex
67 67 cexp(dcomplex z) {
68 68 dcomplex ans;
69 69 double x, y, t, c, s;
70 70 int n, ix, iy, hx, hy, lx, ly;
71 71
72 72 x = D_RE(z);
73 73 y = D_IM(z);
74 74 hx = HI_WORD(x);
75 75 lx = LO_WORD(x);
76 76 hy = HI_WORD(y);
77 77 ly = LO_WORD(y);
78 78 ix = hx & 0x7fffffff;
79 79 iy = hy & 0x7fffffff;
80 80 if ((iy | ly) == 0) { /* y = 0 */
81 81 D_RE(ans) = exp(x);
82 82 D_IM(ans) = y;
83 83 } else if (ISINF(ix, lx)) { /* x is +-inf */
84 84 if (hx < 0) {
85 85 if (iy >= 0x7ff00000) {
86 86 D_RE(ans) = zero;
87 87 D_IM(ans) = zero;
88 88 } else {
89 89 sincos(y, &s, &c);
90 90 D_RE(ans) = zero * c;
91 91 D_IM(ans) = zero * s;
92 92 }
93 93 } else {
94 94 if (iy >= 0x7ff00000) {
95 95 D_RE(ans) = x;
96 96 D_IM(ans) = y - y;
97 97 } else {
98 98 (void) sincos(y, &s, &c);
99 99 D_RE(ans) = x * c;
100 100 D_IM(ans) = x * s;
101 101 }
102 102 }
103 103 } else {
104 104 (void) sincos(y, &s, &c);
105 105 if (ix >= 0x40862E42) { /* |x| > 709.78... ~ log(2**1024) */
106 106 t = __k_cexp(x, &n);
107 107 D_RE(ans) = scalbn(t * c, n);
108 108 D_IM(ans) = scalbn(t * s, n);
109 109 } else {
110 110 t = exp(x);
111 111 D_RE(ans) = t * c;
112 112 D_IM(ans) = t * s;
113 113 }
114 114 }
115 115 return (ans);
116 116 }
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