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 #if defined(ELFOBJ) 31 #pragma weak isnanl = __isnanl 32 #endif 33 34 #include "libm.h" 35 36 #if defined(__sparc) 37 int 38 isnanl(long double x) { 39 int *px = (int *) &x; 40 return ((px[0] & ~0x80000000) >= 0x7fff0000 && 41 ((px[0] & ~0xffff0000) | px[1] | px[2] | px[3]) != 0); 42 } 43 #elif defined(__x86) 44 int 45 isnanl(long double x) { 46 int *px = (int *) &x, t = px[2] & 0x7fff; 47 #if defined(HANDLE_UNSUPPORTED) 48 return ((t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0) || 49 (t != 0 && (px[1] & 0x80000000) == 0)); 50 #else 51 return (t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0); 52 #endif 53 } 54 #endif /* defined(__sparc) || defined(__x86) */ 55