2 * Copyright © <2010>, Intel Corporation.
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4 * This program is licensed under the terms and conditions of the
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5 * Eclipse Public License (EPL), version 1.0. The full text of the EPL is at
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6 * http://www.opensource.org/licenses/eclipse-1.0.php.
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9 // Module name: load_ILDB_Cntrl_Data_16DW.asm
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11 // This module loads AVC ILDB 64DW control data for one MB CTG.
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12 // Dataport expands from 16DW to 64DW.
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14 //----------------------------------------------------------------
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15 // Symbols need to be defined before including this module
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17 // Source region in :ud
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18 // CNTRL_DATA_D: CNTRL_DATA_D Base=rxx ElementSize=4 SrcRegion=REGION(8,1) Type=ud // 8 GRFs
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20 // Binding table index:
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21 // BI_CNTRL_DATA: Binding table index of control data surface
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23 //----------------------------------------------------------------
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25 // On CTG, MB control data in memory occupy 16 DWs. Data port returns 8 GRFs with expanded control data.
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27 #if defined(_MBAFF)
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28 // We need to get control data offset for the bottom MB in mbaff mode.
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29 // That is, get f0.1=1 if MbaffFlag==1 && BotFieldFlag==1
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30 // and (1) CTemp1_W:uw BitFields:uw MbaffFlag+BotFieldFlag:uw // Mute all other bits
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31 // cmp.e.f0.1 (1) NULLREGW CTemp1_W:uw MbaffFlag+BotFieldFlag:uw // Check mbaff and bot flags
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33 and.ne.f0.1 (1) NULLREGW BitFields:uw BotFieldFlag:uw
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36 mov (1) MSGSRC.2:ud CntrlDataOffsetY:ud
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38 (f0.1) add (1) MSGSRC.2:ud MSGSRC.2:ud 64:w // +64 to the next MB control data (bot MB)
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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
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43 // End of load_ILDB_Cntrl_Data_16DW.asm
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47 // AVC ILDB control data message header format
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49 //DWord Bit Description
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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.
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56 //M0.2 31:0 Global Offset. Specifies the global byte offset into the buffer.
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57 // This offset must be OWord aligned (bits 3:0 MBZ) Format = U32 Range = [0,FFFFFFF0h]
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