/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2011 Nexenta Systems, Inc. All rights reserved. */ /* * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #if defined(ELFOBJ) #pragma weak isnanl = __isnanl #endif #include "libm.h" #if defined(__sparc) int isnanl(long double x) { int *px = (int *) &x; return ((px[0] & ~0x80000000) >= 0x7fff0000 && ((px[0] & ~0xffff0000) | px[1] | px[2] | px[3]) != 0); } #elif defined(__x86) int isnanl(long double x) { int *px = (int *) &x, t = px[2] & 0x7fff; #if defined(HANDLE_UNSUPPORTED) return (t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0 || t != 0 && (px[1] & 0x80000000) == 0); #else return (t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0); #endif } #endif /* defined(__sparc) || defined(__x86) */