/*
 * 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.
 */

        .file "isnanf.s"

#include "libm.h"
LIBM_ANSI_PRAGMA_WEAK(isnanf,function)
        .weak _isnanf
        .type _isnanf,@function
_isnanf = __isnanf

        ENTRY(isnanf)
        movl    4(%esp),%eax            / eax <-- x
        andl    $0x7fffffff,%eax        / eax <-- abs(x)
        subl    $0x7f800000,%eax        / ZF <-- 1      iff x is infinite
        jae     .nan_or_inf             / no jump iff arg. is finite
        movl    $0,%eax
        ret
.nan_or_inf:
        jnz     .got_nan                / no jump if arg. infinite;
                                        / let nan waste time
        ret                             / %eax = 0 here
.got_nan:
        movl    $1,%eax                 / %eax was 0, must be made 1 to
                                        / indicate TRUE
        ret
        .align  4
        SET_SIZE(isnanf)