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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_Top_UV_8X2.Asm
//
// Load UV 8X2 Block
//
//----------------------------------------------------------------
// Symbols ceed To be defined before including this module
//
// Source Region Is :UB
// BUF_D: BUF_D Base=Rxx Elementsize=4 Srcregion=Region(8,1) Type=UD
// Binding Table Index:
// BI_SRC_UV: Binding Table Index Of UV Surface (NV12)
//
//----------------------------------------------------------------
#if defined(_DEBUG)
mov (1) EntrySignatureC:w 0xDDD2:w
#endif
// FieldModeCurrentMbFlag determines how to access above 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
// Read U+V
mov (1) MSGSRC.0:ud ORIX_TOP:w { NoDDClr } // Block origin
asr (1) MSGSRC.1:d ORIY_TOP:w 1:w { NoDDClr, NoDDChk } // NV12 U+V block origin y = half of Y comp
mov (1) MSGSRC.2:ud 0x0001000F:ud { NoDDChk } // NV12 U+V block width and height (16x2)
// Load NV12 U+V
// Set message descriptor
(f0.0) if (1) ELSE_UV_8X2
// Frame picture
mov (1) MSGDSC RESP_LEN(1)+DWBRMSGDSC_RC+BI_DEST_UV:ud // Read 1 GRF from SRC_UV
// Add vertical offset 8 for bot MB in MBAFF mode
(f0.1) add (1) MSGSRC.1:d MSGSRC.1:d 8:w
// Dual field mode setup
and.z.f0.1 (1) NULLREGW DualFieldMode:w 1:w
(f0.1) jmpi NOT_DUAL_FIELD_UV
add (1) MSGSRC.1:d MSGSRC.1:d -2:w { NoDDClr } // Load 4 lines in stead of 2
mov (1) MSGSRC.2:ud 0x0003000F:ud { NoDDChk } // New block width and height (16x8)
add (1) MSGDSC MSGDSC RESP_LEN(1):ud // 1 more GRF to receive
NOT_DUAL_FIELD_UV:
ELSE_UV_8X2:
else (1) ENDIF_UV_8X2
// Field picture
asr (1) MSGSRC.1:d ORIY_CUR:w 2:w // asr 1: NV12 U+V block origin y = half of Y comp
// asr 1: Reduce y by half in field access mode
(f0.1) mov (1) MSGDSC RESP_LEN(1)+DWBRMSGDSC_RC_BF+BI_DEST_UV:ud // Read 1 GRF from SRC_Y bottom field
(-f0.1) mov (1) MSGDSC RESP_LEN(1)+DWBRMSGDSC_RC_TF+BI_DEST_UV:ud // Read 1 GRF from SRC_Y top field
add (1) MSGSRC.1:d MSGSRC.1:d -2:w // for last 2 rows of above MB
endif
ENDIF_UV_8X2:
// Read 1 GRF from DEST surface as the above MB has been deblocked.
send (8) PREV_MB_UD(0)<1> MSGHDRU MSGSRC<8;8,1>:ud DAPREAD MSGDSC
// End of load_Top_UV_8x2.asm
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