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  1. /*
  2.  * Copyright © <2010>, Intel Corporation.
  3.  *
  4.  * This program is licensed under the terms and conditions of the
  5.  * Eclipse Public License (EPL), version 1.0.  The full text of the EPL is at
  6.  * http://www.opensource.org/licenses/eclipse-1.0.php.
  7.  *
  8.  */
  9. // Module name: load_ILDB_Cntrl_Data_16DW.asm
  10. //
  11. // This module loads AVC ILDB 64DW control data for one MB CTG.
  12. // Dataport expands from 16DW to 64DW.
  13. //
  14. //----------------------------------------------------------------
  15. //  Symbols need to be defined before including this module
  16. //
  17. //      Source region in :ud
  18. //      CNTRL_DATA_D:   CNTRL_DATA_D Base=rxx ElementSize=4 SrcRegion=REGION(8,1) Type=ud                       // 8 GRFs
  19. //
  20. //      Binding table index:
  21. //      BI_CNTRL_DATA:  Binding table index of control data surface
  22. //
  23. //----------------------------------------------------------------
  24.  
  25. // On CTG, MB control data in memory occupy 16 DWs. Data port returns 8 GRFs with expanded control data.
  26.  
  27. #if defined(_MBAFF)
  28.         // We need to get control data offset for the bottom MB in mbaff mode.
  29.         // That is, get f0.1=1 if MbaffFlag==1 && BotFieldFlag==1
  30. //      and (1) CTemp1_W:uw             BitFields:uw    MbaffFlag+BotFieldFlag:uw       // Mute all other bits
  31. //      cmp.e.f0.1 (1) NULLREGW         CTemp1_W:uw     MbaffFlag+BotFieldFlag:uw       // Check mbaff and bot flags
  32.                
  33.         and.ne.f0.1 (1) NULLREGW        BitFields:uw    BotFieldFlag:uw
  34.  
  35.         // Global offset
  36.         mov (1) MSGSRC.2:ud             CntrlDataOffsetY:ud
  37.                
  38.         (f0.1) add (1) MSGSRC.2:ud              MSGSRC.2:ud             64:w    // +64 to the next MB control data (bot MB)
  39. #endif
  40.  
  41.     send (8) CNTRL_DATA_D(0)<1> MSGHDRY MSGSRC<8;8,1>:ud        DAPREAD RESP_LEN(8)+ILDBRMSGDSC+BI_CNTRL_DATA   // Receive 8 GRFs
  42.  
  43. // End of load_ILDB_Cntrl_Data_16DW.asm
  44.  
  45.  
  46.  
  47. // AVC ILDB control data message header format
  48.  
  49. //DWord Bit     Description
  50. //M0.7  31:0    Debug
  51. //M0.6  31:0    Debug
  52. //M0.5  31:8    Ignored
  53. //              7:0             Dispatch ID. // This ID is assigned by the fixed function unit and is a unique identifier for the thread.  It is used to free up resources used by the thread upon thread completion.
  54. //M0.4  31:0    Ignored
  55. //M0.3  31:0    Ignored
  56. //M0.2  31:0    Global Offset. Specifies the global byte offset into the buffer.
  57.                                 //      This offset must be OWord aligned (bits 3:0 MBZ) Format = U32 Range = [0,FFFFFFF0h]
  58. //M0.1  31:0    Ignored
  59. //M0.0  31:0    Ignored
  60.  
  61.  
  62.  
  63.