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/*
* Copyright © <2010>, Intel Corporation.
*
* This program is licensed under the terms and conditions of the
* Eclipse Public License (EPL), version 1.0. The full text of the EPL is at
* http://www.opensource.org/licenses/eclipse-1.0.php.
*
*/
// Module name: save_Cur_UV_8x8.asm
//
// Save UV 8x8 block (8x8U + 8x8V in NV12)
//
//----------------------------------------------------------------
// Symbols need to be defined before including this module
//
// Source region in :ud
// SRC_UD: SRC_UD Base=rxx ElementSize=4 SrcRegion=REGION(8,1) Type=ud // 4 GRF
//
// Binding table index:
// BI_DEST_UV: Binding table index of UV surface (NV12)
//
//----------------------------------------------------------------
#if defined(_DEBUG)
mov (1) EntrySignatureC:w 0xDDD4:w
#endif
and.z.f0.0 (1) null:w r[ECM_AddrReg, BitFlags]:ub FieldModeCurrentMbFlag:w
and.nz.f0.1 (1) NULLREGW BitFields:w BotFieldFlag:w
mov (1) MSGSRC.0:ud ORIX_CUR:w { NoDDClr } // Block origin
asr (1) MSGSRC.1:ud ORIY_CUR:w 1:w { NoDDClr, NoDDChk } // NV12 U+V block origin y = half of Y comp
mov (1) MSGSRC.2:ud 0x0007000F:ud { NoDDChk } // NV12 U+V block width and height (16x8)
mov (16) MSGPAYLOADD(0)<1> SRC_UD(0) // Compressed inst
mov (16) MSGPAYLOADD(2)<1> SRC_UD(2)
// Set message descriptor
(f0.0) if (1) ELSE_UV_8X8
// Frame picture
mov (1) MSGDSC MSG_LEN(4)+DWBWMSGDSC+BI_DEST_UV:ud // Write 4 GRFs to DEST_UV
(f0.1) add (1) MSGSRC.1:d MSGSRC.1:d 8:w // Add vertical offset 8 for bot MB in MBAFF mode
ELSE_UV_8X8:
else (1) ENDIF_UV_8X8
// Field picture
(f0.1) mov (1) MSGDSC MSG_LEN(4)+DWBWMSGDSC+ENMSGDSCBF+BI_DEST_UV:ud // Write 4 GRFs to DEST_UV bottom field
(-f0.1) mov (1) MSGDSC MSG_LEN(4)+DWBWMSGDSC+ENMSGDSCTF+BI_DEST_UV:ud // Write 4 GRFs to DEST_UV top field
asr (1) MSGSRC.1:d MSGSRC.1:d 1:w // Reduce y by half in field access mode
endif
ENDIF_UV_8X8:
send (8) null:ud MSGHDR MSGSRC<8;8,1>:ud DAPWRITE MSGDSC
// End of save_Cur_UV_8x8.asm
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