/*
 * 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 "finitel.s"

#include "libm.h"

        ENTRY(finitel)
        movl    12(%esp),%eax           / %ax <-- sign&bexp(x)
        testl   $0x80000000,8(%esp)     / ZF = 1 iff hi_32(sgnfcnd(x))'s msb = 0
        jz      .chk_denormal_or_0
        notl    %eax                    / not(bexp) = 0 iff bexp = all 1's
        andl    $0x00007fff,%eax        / ZF <-- 1      iff not(bexp) = 0
        jz      .done                   / no jump if arg. is finite
        movl    $1,%eax                 / ansi needs %eax = 1
.done:
        ret

.chk_denormal_or_0:
        andl    $0x00007fff,%eax        / ZF <-- 1 iff bexp = 0 iff denormal or 0
        jnz     .unsupported            / jump if arg has unsupported format
        movl    $1,%eax                 / ansi needs %eax = 1
        ret

.unsupported:
        movl    $0,%eax                 / unsupported format does not represent
        ret                             / a finite number
        .align  4
        SET_SIZE(finitel)