1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 24 */ 25 /* 26 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 30 #pragma weak __ccoshl = ccoshl 31 32 #include "libm.h" /* coshl/expl/fabsl/scalbnl/sincosl/sinhl/__k_cexpl */ 33 #include "complex_wrapper.h" 34 35 /* INDENT OFF */ 36 static const long double zero = 0.0L, half = 0.5L; 37 /* INDENT ON */ 38 39 ldcomplex 40 ccoshl(ldcomplex z) { 41 long double t, x, y, S, C; 42 int hx, ix, hy, iy, n; 43 ldcomplex ans; 44 45 x = LD_RE(z); 46 y = LD_IM(z); 47 hx = HI_XWORD(x); 48 ix = hx & 0x7fffffff; 49 hy = HI_XWORD(y); 50 iy = hy & 0x7fffffff; 51 x = fabsl(x); 52 y = fabsl(y); 53 54 (void) sincosl(y, &S, &C); 55 if (ix >= 0x4004e000) { /* |x| > 60 = prec/2 (14,28,34,60) */ 56 if (ix >= 0x400C62E4) { /* |x| > 11356.52... ~ log(2**16384) */ 57 if (ix >= 0x7fff0000) { /* |x| is inf or NaN */ 58 if (y == zero) { 59 LD_RE(ans) = x; 60 LD_IM(ans) = y; 61 } else if (iy >= 0x7fff0000) { 62 LD_RE(ans) = x; 63 LD_IM(ans) = x - y; 64 } else { 65 LD_RE(ans) = C * x; 66 LD_IM(ans) = S * x; 67 } 68 } else { 69 t = __k_cexpl(x, &n); 70 /* return exp(x)=t*2**n */ 71 LD_RE(ans) = scalbnl(C * t, n - 1); 72 LD_IM(ans) = scalbnl(S * t, n - 1); 73 } 74 } else { 75 t = expl(x) * half; 76 LD_RE(ans) = C * t; 77 LD_IM(ans) = S * t; 78 } 79 } else { 80 if (x == zero) { /* x = 0, return (C,0) */ 81 LD_RE(ans) = C; 82 LD_IM(ans) = zero; 83 } else { 84 LD_RE(ans) = C * coshl(x); 85 LD_IM(ans) = S * sinhl(x); 86 } 87 } 88 if ((hx ^ hy) < 0) 89 LD_IM(ans) = -LD_IM(ans); 90 return (ans); 91 } 92