usr/src/lib/libc/amd64/fp/fpcw.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   "fpcw.s"
  27
  28 #include <SYS.h>
  29
  30         ENTRY(_getcw)
  31         fstcw   (%rdi)
  32         ret
  33         SET_SIZE(_getcw)
  34
  35         ENTRY(_putcw)
  36         subq    $8,%rsp
  37         movq    %rdi,(%rsp)
  38         fldcw   (%rsp)
  39         addq    $8,%rsp
  40         ret
  41         SET_SIZE(_putcw)
  42
  43         ENTRY(_getsw)
  44         fstsw   (%rdi)
  45         ret
  46         SET_SIZE(_getsw)
  47
  48         ENTRY(_putsw)
  49         andq    $0x3f,%rdi
  50         jnz     1f
  51         fnclex
  52         ret
  53 1:
  54         subq    $32,%rsp
  55         fnstsw  %ax
  56         fnstenv (%rsp)
  57         andw    $0xffc0,%ax
  58         orw     %ax,%di
  59         movw    %di,4(%rsp)
  60         fldenv  (%rsp)
  61         addq    $32,%rsp
  62         ret
  63         SET_SIZE(_putsw)
  64
  65         ENTRY(_getmxcsr)
  66         stmxcsr (%rdi)
  67         ret
  68         SET_SIZE(_getmxcsr)
  69
  70         ENTRY(_putmxcsr)
  71         subq    $8,%rsp
  72         movq    %rdi,(%rsp)
  73         ldmxcsr (%rsp)
  74         addq    $8,%rsp
  75         ret
  76         SET_SIZE(_putmxcsr)