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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_Top_UV_8x2.asm
//
// Save UV 8x2 block (8x2U + 8x2V 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 // 1 GRF
//
// Binding table index:
// BI_DEST_UV: Binding table index of UV surface (NV12)
//
//----------------------------------------------------------------
#if defined(_DEBUG)
mov (1) EntrySignatureC:w 0xDDD5:w
#endif
and.z.f0.1 (8) NULLREGW DualFieldMode<0;1,0>:w 1:w
// FieldModeCurrentMbFlag determines how to access above MB
and.z.f0.0 (1) null:w r[ECM_AddrReg, BitFlags]:ub FieldModeCurrentMbFlag:w
// Pack U and V
mov (1) MSGSRC.0:ud ORIX_TOP:w { NoDDClr } // Block origin
asr (1) MSGSRC.1:ud 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)
// Dual field mode
(f0.1) mov (8) MSGPAYLOADD(0)<1> PREV_MB_UD(0)
(-f0.1) mov (8) MSGPAYLOADD(0)<1> PREV_MB_UD(1) // for dual field mode, write last 2 rows
// Set message descriptor
and.nz.f0.1 (1) NULLREGW BitFields:w BotFieldFlag:w
(f0.0) if (1) ELSE_UV_8X2_SAVE
// Frame picture
mov (1) MSGDSC MSG_LEN(1)+DWBWMSGDSC_WC+BI_DEST_UV:ud // Write 1 GRFs to DEST_UV
// Add vertical offset 8 for bot MB in MBAFF mode
(f0.1) add (1) MSGSRC.1:d MSGSRC.1:d 8:w
ELSE_UV_8X2_SAVE:
else (1) ENDIF_UV_8X2_SAVE
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
// Field picture
(f0.1) mov (1) MSGDSC MSG_LEN(1)+DWBWMSGDSC_WC+ENMSGDSCBF+BI_DEST_UV:ud // Write 1 GRF to DEST_Y bottom field
(-f0.1) mov (1) MSGDSC MSG_LEN(1)+DWBWMSGDSC_WC+ENMSGDSCTF+BI_DEST_UV:ud // Write 1 GRF to DEST_Y top field
add (1) MSGSRC.1:d MSGSRC.1:d -2:w // for last 4 rows of above MB
endif
ENDIF_UV_8X2_SAVE:
send (8) WritebackResponse(0)<1> MSGHDR MSGSRC<8;8,1>:ud DAPWRITE MSGDSC
// End of save_Top_UV_8x2.asm
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