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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_Left_UV_8x2T.asm
//
// Transpose 8x2 to 2x8 UV data and write to memory
//
//----------------------------------------------------------------
// Symbols need to be defined before including this module
//
// Left MB region:
// PREV_MB_UW: Base=ryy ElementSize=2 SrcRegion=REGION(8,1) Type=uw
// Binding table index:
// BI_SRC_UV: Binding table index of UV surface (NV12)
//
// Temp buffer:
// BUF_W: BUF_W Base=rxx ElementSize=1 SrcRegion=REGION(8,1) Type=uw
//
//
#if defined(_DEBUG)
mov (1) EntrySignatureC:w 0xDDD6: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
// Transpose U/V, save them to MRFs in NV12 format
mov (1) MSGSRC.0:ud ORIX_LEFT:w { NoDDClr } // Block origin
asr (1) MSGSRC.1:ud ORIY_LEFT:w 1:w { NoDDClr, NoDDChk } // NV12 U+V block origin y = half of Y comp
mov (1) MSGSRC.2:ud 0x00070003:ud { NoDDChk } // NV12 U+V block width and height (4x8)
// 16x2 UV src in GRF (each pix is specified as yx)
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |71 71 61 61 51 51 41 41 31 31 21 21 11 11 01 01 70 70 60 60 50 50 40 40 30 30 20 20 10 10 00 00|
// +-----------------------+-----------------------+-----------------------+-----------------------+
//
// First step (8) <1> <=== <8;4,1>:w
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |71 71 61 61 51 51 41 41 70 70 60 60 50 50 40 40 31 31 21 21 11 11 01 01 30 30 20 20 10 10 00 00|
// +-----------------------+-----------------------+-----------------------+-----------------------+
mov (8) BUF_W(0,0)<1> PREV_MB_UW(0,0)<8;4,1> { NoDDClr }
mov (8) BUF_W(0,8)<1> PREV_MB_UW(0,4)<8;4,1> { NoDDChk }
// Second step (8) <1> <=== <1;2,4>
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |71 71 70 70 61 61 60 60 51 51 50 50 41 41 40 40 31 31 30 30 21 21 20 20 11 11 10 10 01 01 00 00|
// +-----------------------+-----------------------+-----------------------+-----------------------+
mov (8) MSGPAYLOADW(0,0)<1> BUF_W(0,0)<1;2,4>
mov (8) MSGPAYLOADW(0,8)<1> BUF_W(0,8)<1;2,4>
// Transposed U+V in NV12 in 4x8 is ready for writting to dataport.
// Set message descriptor
(f0.0) if (1) ELSE_UV_8X2T
// Frame picture
mov (1) MSGDSC MSG_LEN(1)+DWBWMSGDSC+BI_DEST_UV:ud // Write 1 GRF 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_8X2T:
else (1) ENDIF_UV_8X2T
// Field picture
(f0.1) mov (1) MSGDSC MSG_LEN(1)+DWBWMSGDSC+ENMSGDSCBF+BI_DEST_UV:ud // Write 1 GRF to DEST_UV bottom field
(-f0.1) mov (1) MSGDSC MSG_LEN(1)+DWBWMSGDSC+ENMSGDSCTF+BI_DEST_UV:ud // Write 1 GRF 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_8X2T:
send (8) null:ud MSGHDR MSGSRC<8;8,1>:ud DAPWRITE MSGDSC
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