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 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 23 */ 24 /* 25 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 26 * Use is subject to license terms. 27 */ 28 29 #pragma weak __gamma = gamma 30 31 #include "libm.h" 32 33 extern int signgam; 34 35 double 36 gamma(double x) { 37 double g; 38 39 if (!finite(x)) 40 return (x * x); 41 42 g = rint(x); 43 if (x == g && x <= 0.0) { 44 signgam = 1; 45 return (_SVID_libm_err(x, x, 41)); 46 } 47 48 g = __k_lgamma(x, &signgam); 49 if (!finite(g)) 50 g = _SVID_libm_err(x, x, 40); 51 return (g); 52 } 53