MdePkg/Library/BaseLib/Ipf/AccessGp.s

   1 /// @file
   2 ///  IPF specific Global Pointer and Stack Pointer accessing functions
   3 ///
   4 /// Copyright (c) 2006, Intel Corporation
   5 /// All rights reserved. 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: AccessGp.s
  14 ///
  15 ///
  16
  17 //---------------------------------------------------------------------------------
  18 //++
  19 // AsmReadGp
  20 //
  21 // This routine is used to read the current value of 64-bit Global Pointer (GP).
  22 //
  23 // Arguments :
  24 //
  25 // On Entry :
  26 //
  27 // Return Value: The current GP value.
  28 //
  29 //--
  30 //----------------------------------------------------------------------------------
  31 .text
  32 .type   AsmReadGp, @function
  33 .proc   AsmReadGp
  34
  35 AsmReadGp::
  36         mov             r8 = gp;;
  37         br.ret.dpnt     b0;;
  38 .endp   AsmReadGp
  39
  40 //---------------------------------------------------------------------------------
  41 //++
  42 // AsmWriteGp
  43 //
  44 // This routine is used to write the current value of 64-bit Global Pointer (GP).
  45 //
  46 // Arguments :
  47 //
  48 // On Entry : The value need to be written.
  49 //
  50 // Return Value: The value have been written.
  51 //
  52 //--
  53 //----------------------------------------------------------------------------------
  54 .text
  55 .type   AsmWriteGp, @function
  56 .proc   AsmWriteGp
  57 .regstk 1, 0, 0, 0
  58
  59 AsmWriteGp::
  60         mov             gp = in0
  61         mov             r8 = in0;;
  62         br.ret.dpnt     b0;;
  63 .endp   AsmWriteGp
  64
  65 //---------------------------------------------------------------------------------
  66 //++
  67 // AsmReadSp
  68 //
  69 // This routine is used to read the current value of 64-bit Stack Pointer (SP).
  70 //
  71 // Arguments :
  72 //
  73 // On Entry :
  74 //
  75 // Return Value: The current SP value.
  76 //
  77 //--
  78 //----------------------------------------------------------------------------------
  79 .text
  80 .type   AsmReadSp, @function
  81 .proc   AsmReadSp
  82
  83 AsmReadSp::
  84         mov             r8 = sp;;
  85         br.ret.dpnt     b0;;
  86 .endp   AsmReadSp