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 __isnanl = isnanl 31 32 #include "libm.h" 33 34 #if defined(__sparc) 35 int 36 isnanl(long double x) { 37 int *px = (int *) &x; 38 return ((px[0] & ~0x80000000) >= 0x7fff0000 && 39 ((px[0] & ~0xffff0000) | px[1] | px[2] | px[3]) != 0); 40 } 41 #elif defined(__x86) 42 int 43 isnanl(long double x) { 44 int *px = (int *) &x, t = px[2] & 0x7fff; 45 #if defined(HANDLE_UNSUPPORTED) 46 return ((t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0) || 47 (t != 0 && (px[1] & 0x80000000) == 0)); 48 #else 49 return (t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0); 50 #endif 51 } 52 #endif /* defined(__sparc) || defined(__x86) */ 53