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 nan = __nan 31 32 /* 33 * nan(c) returns a NaN. This implementation ignores c. 34 */ 35 36 #include "libm.h" 37 #include <sys/isa_defs.h> 38 39 #if defined(__sparc) 40 41 static const union { 42 unsigned i[2]; 43 double d; 44 } __nan_union = { 0x7fffffff, 0xffffffff }; 45 46 #elif defined(__i386) || defined(__amd64) 47 48 static const union { 49 unsigned i[2]; 50 double d; 51 } __nan_union = { 0xffffffff, 0x7fffffff }; 52 53 #else 54 #error Unknown architecture 55 #endif 56 57 /* ARGSUSED0 */ 58 double 59 __nan(const char *c) { 60 return (__nan_union.d); 61 } 62