EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ipf/AccessGp.s

   1 /// Copyright (c) 2006, Intel Corporation
   2 /// All rights reserved. This program and the accompanying materials
   3 /// are licensed and made available under the terms and conditions of the BSD License
   4 /// which accompanies this distribution.  The full text of the license may be found at
   5 /// http://opensource.org/licenses/bsd-license.php
   6 ///
   7 /// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   8 /// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
   9 ///
  10 /// Module Name: AccessGp.s
  11 ///
  12 ///
  13 ///  IPF specific Global Pointer and Stack Pointer accessing functions
  14 ///
  15
  16 //---------------------------------------------------------------------------------
  17 //++
  18 // AsmReadGp
  19 //
  20 // This routine is used to read the current value of 64-bit Global Pointer (GP).
  21 //
  22 // Arguments :
  23 //
  24 // On Entry :
  25 //
  26 // Return Value: The current GP value.
  27 //
  28 //--
  29 //----------------------------------------------------------------------------------
  30 .text
  31 .type   AsmReadGp, @function
  32 .proc   AsmReadGp
  33
  34 AsmReadGp::
  35         mov             r8 = gp;;
  36         br.ret.dpnt     b0;;
  37 .endp   AsmReadGp
  38
  39 //---------------------------------------------------------------------------------
  40 //++
  41 // AsmWriteGp
  42 //
  43 // This routine is used to write the current value of 64-bit Global Pointer (GP).
  44 //
  45 // Arguments :
  46 //
  47 // On Entry : The value need to be written.
  48 //
  49 // Return Value: The value have been written.
  50 //
  51 //--
  52 //----------------------------------------------------------------------------------
  53 .text
  54 .type   AsmWriteGp, @function
  55 .proc   AsmWriteGp
  56 .regstk 1, 0, 0, 0
  57
  58 AsmWriteGp::
  59         mov             gp = in0
  60         mov             r8 = in0;;
  61         br.ret.dpnt     b0;;
  62 .endp   AsmWriteGp
  63
  64 //---------------------------------------------------------------------------------
  65 //++
  66 // AsmReadSp
  67 //
  68 // This routine is used to read the current value of 64-bit Stack Pointer (SP).
  69 //
  70 // Arguments :
  71 //
  72 // On Entry :
  73 //
  74 // Return Value: The current SP value.
  75 //
  76 //--
  77 //----------------------------------------------------------------------------------
  78 .text
  79 .type   AsmReadSp, @function
  80 .proc   AsmReadSp
  81
  82 AsmReadSp::
  83         mov             r8 = sp;;
  84         br.ret.dpnt     b0;;
  85 .endp   AsmReadSp