MdePkg/Library/BaseLib/Ipf/SwitchStack.s

   1 /// @file
   2 ///  IPF specific SwitchStack() function
   3 ///
   4 /// Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
   5 /// This program and the accompanying materials
   6 /// are licensed and made available under the terms and conditions of the BSD License
   7 /// which accompanies this distribution.  The full text of the license may be found at
   8 /// http://opensource.org/licenses/bsd-license.php
   9 ///
  10 /// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 /// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 ///
  13 /// Module Name: SwitchStack.s
  14 ///
  15 ///
  16
  17 .auto
  18 .text
  19
  20 .proc   AsmSwitchStackAndBackingStore
  21 .type   AsmSwitchStackAndBackingStore, @function
  22 .regstk 5, 0, 0, 0
  23 AsmSwitchStackAndBackingStore::
  24         mov                 r14 = ar.rsc
  25         movl                r2  = ~((((1 << 14) - 1) << 16) | 3)
  26
  27         mov                 r17 = in1
  28         mov                 r18 = in2
  29         and                 r2  = r14, r2
  30
  31         mov                 ar.rsc = r2
  32         mov                 sp  = in3
  33         mov                 r19 = in4
  34
  35         ld8.nt1             r16 = [in0], 8
  36         ld8.nta             gp  = [in0]
  37         mov                 r3  = -1
  38
  39         loadrs
  40         mov                 ar.bspstore = r19
  41         mov                 b7  = r16
  42
  43         alloc               r2  = ar.pfs, 0, 0, 2, 0
  44         mov                 out0 = r17
  45         mov                 out1 = r18
  46
  47         mov                 ar.rnat = r3
  48         mov                 ar.rsc = r14
  49         br.call.sptk.many   b0  = b7
  50 .endp   AsmSwitchStackAndBackingStore