xref: /titanic_41/usr/src/lib/libc/amd64/fp/__xgetRD.s (revision da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968)
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, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27	.ident	"%Z%%M%	%I%	%E% SMI"
28
29	.file	"%M%"
30
31#include <SYS.h>
32
33/ 00 - Round to nearest or even
34/ 01 - Round down
35/ 10 - Round up
36/ 11 - Chop
37
38	ENTRY(__xgetRD)
39	subq	$8,%rsp
40	fstcw	(%rsp)
41	movw	(%rsp),%ax
42	shrw	$10,%ax
43	andq	$0x3,%rax
44	addq	$8,%rsp
45	ret
46	SET_SIZE(__xgetRD)
47