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: save_Cur_UV_8x8.asm
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11 // Save UV 8x8 block (8x8U + 8x8V in NV12)
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13 //----------------------------------------------------------------
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14 // Symbols need to be defined before including this module
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16 // Source region in :ud
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17 // SRC_UD: SRC_UD Base=rxx ElementSize=4 SrcRegion=REGION(8,1) Type=ud // 4 GRF
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19 // Binding table index:
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20 // BI_DEST_UV: Binding table index of UV surface (NV12)
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22 //----------------------------------------------------------------
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24 #if defined(_DEBUG)
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25 mov (1) EntrySignatureC:w 0xDDD4:w
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28 and.z.f0.0 (1) null:w r[ECM_AddrReg, BitFlags]:ub FieldModeCurrentMbFlag:w
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30 and.nz.f0.1 (1) NULLREGW BitFields:w BotFieldFlag:w
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32 mov (1) MSGSRC.0:ud ORIX_CUR:w { NoDDClr } // Block origin
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33 asr (1) MSGSRC.1:ud ORIY_CUR:w 1:w { NoDDClr, NoDDChk } // NV12 U+V block origin y = half of Y comp
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34 mov (1) MSGSRC.2:ud 0x0007000F:ud { NoDDChk } // NV12 U+V block width and height (16x8)
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36 mov (16) MSGPAYLOADD(0)<1> SRC_UD(0) // Compressed inst
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37 mov (16) MSGPAYLOADD(2)<1> SRC_UD(2)
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39 // Set message descriptor
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41 (f0.0) if (1) ELSE_UV_8X8
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44 mov (1) MSGDSC MSG_LEN(4)+DWBWMSGDSC+BI_DEST_UV:ud // Write 4 GRFs to DEST_UV
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46 (f0.1) add (1) MSGSRC.1:d MSGSRC.1:d 8:w // Add vertical offset 8 for bot MB in MBAFF mode
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49 else (1) ENDIF_UV_8X8
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52 (f0.1) mov (1) MSGDSC MSG_LEN(4)+DWBWMSGDSC+ENMSGDSCBF+BI_DEST_UV:ud // Write 4 GRFs to DEST_UV bottom field
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53 (-f0.1) mov (1) MSGDSC MSG_LEN(4)+DWBWMSGDSC+ENMSGDSCTF+BI_DEST_UV:ud // Write 4 GRFs to DEST_UV top field
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55 asr (1) MSGSRC.1:d MSGSRC.1:d 1:w // Reduce y by half in field access mode
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60 send (8) null:ud MSGHDR MSGSRC<8;8,1>:ud DAPWRITE MSGDSC
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62 // End of save_Cur_UV_8x8.asm
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