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 __cexpl = cexpl 31 32 #include "libm.h" /* expl/isinfl/iszerol/scalbnl/sincosl */ 33 #include "complex_wrapper.h" 34 35 extern int isinfl(long double); 36 extern int iszerol(long double); 37 38 /* INDENT OFF */ 39 static const long double zero = 0.0L; 40 /* INDENT ON */ 41 42 ldcomplex 43 cexpl(ldcomplex z) { 44 ldcomplex ans; 45 long double x, y, t, c, s; 46 int n, ix, iy, hx, hy; 47 48 x = LD_RE(z); 49 y = LD_IM(z); 50 hx = HI_XWORD(x); 51 hy = HI_XWORD(y); 52 ix = hx & 0x7fffffff; 53 iy = hy & 0x7fffffff; 54 if (iszerol(y)) { /* y = 0 */ 55 LD_RE(ans) = expl(x); 56 LD_IM(ans) = y; 57 } else if (isinfl(x)) { /* x is +-inf */ 58 if (hx < 0) { 59 if (iy >= 0x7fff0000) { 60 LD_RE(ans) = zero; 61 LD_IM(ans) = zero; 62 } else { 63 sincosl(y, &s, &c); 64 LD_RE(ans) = zero * c; 65 LD_IM(ans) = zero * s; 66 } 67 } else { 68 if (iy >= 0x7fff0000) { 69 LD_RE(ans) = x; 70 LD_IM(ans) = y - y; 71 } else { 72 (void) sincosl(y, &s, &c); 73 LD_RE(ans) = x * c; 74 LD_IM(ans) = x * s; 75 } 76 } 77 } else { 78 (void) sincosl(y, &s, &c); 79 if (ix >= 0x400C62E4) { /* |x| > 11356.52... ~ log(2**16384) */ 80 t = __k_cexpl(x, &n); 81 LD_RE(ans) = scalbnl(t * c, n); 82 LD_IM(ans) = scalbnl(t * s, n); 83 } else { 84 t = expl(x); 85 LD_RE(ans) = t * c; 86 LD_IM(ans) = t * s; 87 } 88 } 89 return (ans); 90 } 91