usr/src/lib/libc/amd64/fp/__xgetRD.s

   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  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26         .file   "__xgetRD.s"
  27
  28 #include <SYS.h>
  29
  30 / 00 - Round to nearest or even
  31 / 01 - Round down
  32 / 10 - Round up
  33 / 11 - Chop
  34
  35         ENTRY(__xgetRD)
  36         subq    $8,%rsp
  37         fstcw   (%rsp)
  38         movw    (%rsp),%ax
  39         shrw    $10,%ax
  40         andq    $0x3,%rax
  41         addq    $8,%rsp
  42         ret
  43         SET_SIZE(__xgetRD)