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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: load_Y_4x16T.asm
//
// Load luma left MB 4x16 and transpose 4x16 to 16x4.
//
//----------------------------------------------------------------
// Symbols need to be defined before including this module
//
// Source region in :ud
// PREV_MB_YD: PREV_MB_YD Base=rxx ElementSize=4 SrcRegion=REGION(8,1) Type=ud // 2 GRFs
//
// Binding table index:
// BI_SRC_Y: Binding table index of Y surface
//
//----------------------------------------------------------------
#if defined(_DEBUG)
mov (1) EntrySignatureC:w 0xDDD0:w
#endif
// FieldModeCurrentMbFlag determines how to access left MB
and.z.f0.0 (1) null:w r[ECM_AddrReg, BitFlags]:ub FieldModeCurrentMbFlag:w
and.nz.f0.1 (1) NULLREGW BitFields:w BotFieldFlag:w // Get bottom field flag
// Read Y
mov (2) MSGSRC.0<1>:ud ORIX_LEFT<2;2,1>:w { NoDDClr } // Block origin
mov (1) MSGSRC.2<1>:ud 0x000F0003:ud { NoDDChk } // Block width and height (4x16)
// Set message descriptor, etc.
(f0.0) if (1) ELSE_Y_4x16T
// Frame picture
mov (1) MSGDSC RESP_LEN(2)+DWBRMSGDSC_RC+BI_DEST_Y:ud // Read 2 GRFs from DEST_Y
(f0.1) add (1) MSGSRC.1:d MSGSRC.1:d 16:w // Add vertical offset 16 for bot MB in MBAFF mode
ELSE_Y_4x16T:
else (1) ENDIF_Y_4x16T
// Field picture
(f0.1) mov (1) MSGDSC RESP_LEN(2)+DWBRMSGDSC_RC_BF+BI_DEST_Y:ud // Read 2 GRFs from DEST_Y bottom field
(-f0.1) mov (1) MSGDSC RESP_LEN(2)+DWBRMSGDSC_RC_TF+BI_DEST_Y:ud // Read 2 GRFs from DEST_Y top field
asr (1) MSGSRC.1:d MSGSRC.1:d 1:w // Reduce y by half in field access mode
endif
ENDIF_Y_4x16T:
// send (8) BUF_D(0)<1> MSGHDRY MSGSRC<8;8,1>:ud MSGDSC
send (8) LEFT_TEMP_D(0)<1> MSGHDRL MSGSRC<8;8,1>:ud DAPREAD MSGDSC
// Transpose 4x16 to 16x4
// Input received from dport:
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |73 72 71 70 63 62 61 60 53 52 51 50 43 42 41 40 33 32 31 30 23 22 21 20 13 12 11 10 03 02 01 00|
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |f3 f2 f1 f0 e3 e2 e1 e0 d3 d2 d1 d0 c3 c2 c1 c0 b3 b2 b1 b0 a3 a2 a1 a0 93 92 91 90 83 82 81 80|
// +-----------------------+-----------------------+-----------------------+-----------------------+
// Output of transpose: <1> <= <32;8,4>
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |f1 e1 d1 c1 b1 a1 91 81 71 61 51 41 31 21 11 01 f0 e0 d0 c0 b0 a0 90 80 70 60 50 40 30 20 10 00|
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |f3 e3 d3 c3 b3 a3 93 83 73 63 53 43 33 23 13 03 f2 e2 d2 c2 b2 a2 92 82 72 62 52 42 32 22 12 02|
// +-----------------------+-----------------------+-----------------------+-----------------------+
/*
// Transpose the data, also occupy 2 GRFs
mov (16) PREV_MB_YB(0)<1> BUF_B(0, 0)<32;8,4> { NoDDClr }
mov (16) PREV_MB_YB(0, 16)<1> BUF_B(0, 1)<32;8,4> { NoDDChk }
mov (16) PREV_MB_YB(1)<1> BUF_B(0, 2)<32;8,4> { NoDDClr }
mov (16) PREV_MB_YB(1, 16)<1> BUF_B(0, 3)<32;8,4> { NoDDChk }
*/
// End of load_Y_4x16T
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