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/*
* Decode Intra_4x4 macroblock
* 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.
*
*/
// Kernel name: Intra_4x4.asm
//
// Decoding of Intra_4x4 macroblock
//
// $Revision: 12 $
// $Date: 10/18/06 4:10p $
//
// ----------------------------------------------------
// Main: Intra_4x4
// ----------------------------------------------------
#define INTRA_4X4
.kernel Intra_4x4
INTRA_4x4:
#ifdef _DEBUG
// WA for FULSIM so we'll know which kernel is being debugged
mov (1) acc0:ud 0x02aa55a5:ud
#endif
#include "SetupForHWMC.asm"
#undef PPREDBUF_Y
#define PPREDBUF_Y a0.3 // Pointer to predicted Y picture
#define REG_INTRA_PRED_AVAIL REG_INTRA_TEMP_4
#define REG_INTRA_4X4_PRED REG_INTRA_TEMP_7 // Store predicted Intra_4x4 data
// Offset where 4x4 predicted data blocks are stored
#define PREDSUBBLK0 0*GRFWIB
#define PREDSUBBLK1 1*GRFWIB
#define PREDSUBBLK2 2*GRFWIB
#define PREDSUBBLK3 3*GRFWIB
#define PREDSUBBLK4 4*GRFWIB
#define PREDSUBBLK5 5*GRFWIB
#define PREDSUBBLK6 6*GRFWIB
#define PREDSUBBLK7 7*GRFWIB
#define PREDSUBBLK8 8*GRFWIB
#define PREDSUBBLK9 9*GRFWIB
#define PREDSUBBLK10 10*GRFWIB
#define PREDSUBBLK11 11*GRFWIB
#define PREDSUBBLK12 12*GRFWIB
#define PREDSUBBLK13 13*GRFWIB
#define PREDSUBBLK14 14*GRFWIB
#define PREDSUBBLK15 15*GRFWIB
// 4x4 error block byte offset within the 8x8 error block
#define ERRBLK0 0
#define ERRBLK1 8
#define ERRBLK2 64
#define ERRBLK3 72
#ifdef SW_SCOREBOARD
CALL(scoreboard_start_intra,1)
#endif
#ifdef SW_SCOREBOARD
wait n0:ud // Now wait for scoreboard to response
#endif
//
// Decode Y blocks
//
// Load reference data from neighboring macroblocks
CALL(load_Intra_Ref_Y,1)
mov (1) PERROR<1>:w ERRBUF*GRFWIB:w // Pointer to macroblock error data
mov (1) PPREDBUF_Y<1>:w PREDBUF*GRFWIB:w // Pointer to predicted data
shr (2) REG_INTRA_PRED_AVAIL<1>:w REG_INTRA_PRED_AVAIL_FLAG_BYTE<0;1,0>:ub 0x40:v
and.nz.f0.0 (8) NULLREG REG_INTRA_PRED_AVAIL_FLAG_BYTE<0;1,0>:ub 4:w // Top-right macroblock available for intra prediction?
(-f0.0.any8h) mov (8) INTRA_REF_TOP(0,16)<1> INTRA_REF_TOP(0,15)REGION(1,0) // Extend right boundary of MB B to C
// Intra predict Intra_4x4 luma blocks
//
// Sub-macroblock 0 *****************
mov (16) REF_TOP0(0)<1> INTRA_REF_TOP0(0) // Top reference data
mov (8) REF_LEFT(0)<1> INTRA_REF_LEFT(0)REGION(8,4) // Left reference data
shr (4) PRED_MODE<1>:w INTRA_PRED_MODE(0)<1;2,0> 0x4040:v // Expand IntraPredMode to 1 byte/block
CALL(intra_Pred_4x4_Y_4,1)
add (1) PERROR<1>:w PERROR<0;1,0>:w 0x0080:w // Pointers to next error block
or (1) REG_INTRA_PRED_AVAIL<1>:w REG_INTRA_PRED_AVAIL<0;1,0>:w 0x1:w // Left neighbor is available now
// Sub-macroblock 1 *****************
mov (16) REF_TOP0(0)<1> INTRA_REF_TOP0(0,8) // Top reference data
mov (4) REF_LEFT(0)<1> r[PPREDBUF_Y,PREDSUBBLK1+6]<8;1,0>:ub // Left reference data (top half)
mov (4) REF_LEFT(0,4)<1> r[PPREDBUF_Y,PREDSUBBLK3+6]<8;1,0>:ub // Left reference data (bottom half)
shr (4) PRED_MODE<1>:w INTRA_PRED_MODE(0,2)<1;2,0> 0x4040:v // Expand IntraPredMode to 1 byte/block
add (1) PPREDBUF_Y<1>:w PPREDBUF_Y<0;1,0>:w 4*GRFWIB:w // Pointer to predicted sub-macroblock 1
CALL(intra_Pred_4x4_Y_4,1)
add (1) PERROR<1>:w PERROR<0;1,0>:w 0x0080:w // Pointers to next error block
or (1) REG_INTRA_PRED_AVAIL<1>:w REG_INTRA_PRED_AVAIL.1<0;1,0>:w 0x2:w // Top neighbor is available now
// Pack constructed data from word-aligned to byte-aligned format
// to speed up save_4x4_Y module later
// PPREDBUF_Y now points to sub-block #4
mov (16) r[PPREDBUF_Y,-PREDSUBBLK4]<1>:ub r[PPREDBUF_Y,-PREDSUBBLK4]<32;16,2>:ub // Sub-block 0
mov (16) r[PPREDBUF_Y,0-PREDSUBBLK4+16]<1>:ub r[PPREDBUF_Y,-PREDSUBBLK3]<32;16,2>:ub // Sub-block 1
mov (16) r[PPREDBUF_Y,-PREDSUBBLK2]<1>:ub r[PPREDBUF_Y,-PREDSUBBLK2]<32;16,2>:ub // Sub-block 2
mov (16) r[PPREDBUF_Y,0-PREDSUBBLK2+16]<1>:ub r[PPREDBUF_Y,-PREDSUBBLK1]<32;16,2>:ub // Sub-block 3
mov (16) r[PPREDBUF_Y,-PREDSUBBLK3]<1>:ub r[PPREDBUF_Y]<32;16,2>:ub // Sub-block 4
mov (16) r[PPREDBUF_Y,0-PREDSUBBLK3+16]<1>:ub r[PPREDBUF_Y,PREDSUBBLK1]<32;16,2>:ub // Sub-block 5
mov (16) r[PPREDBUF_Y,-PREDSUBBLK1]<1>:ub r[PPREDBUF_Y,PREDSUBBLK2]<32;16,2>:ub // Sub-block 6
mov (16) r[PPREDBUF_Y,0-PREDSUBBLK1+16]<1>:ub r[PPREDBUF_Y,PREDSUBBLK3]<32;16,2>:ub // Sub-block 7
// Sub-macroblock 2 *****************
mov (4) REF_TOP0(0)<1> INTRA_REF_LEFT0(0,28)REGION(4,1) // Top-left reference data
mov (8) REF_TOP0(0,4)<1> r[PPREDBUF_Y,0-2*GRFWIB+12]<16;4,1>:ub // Top reference data from SB 2,3
mov (8) REF_TOP0(0,12)<1> r[PPREDBUF_Y,0-GRFWIB+12]<16;4,1>:ub // Top reference data from SB 6,7
mov (8) REF_TOP0(0,20)<1> r[PPREDBUF_Y,0-GRFWIB+31]<0;1,0>:ub // Top-right reference data
mov (16) REG_INTRA_REF_TOP<1>:w REF_TOP_W(0) // Store top reference data for SubMB #2 and #3.
mov (8) REF_LEFT(0)<1> INTRA_REF_LEFT(1)REGION(8,4) // Left reference data
shr (4) PRED_MODE<1>:w INTRA_PRED_MODE(0,4)<1;2,0> 0x4040:v // Expand IntraPredMode to 1 byte/block
CALL(intra_Pred_4x4_Y_4,1)
add (1) PERROR<1>:w PERROR<0;1,0>:w 0x0080:w // Pointers to next error block
or (1) REG_INTRA_PRED_AVAIL<1>:w REG_INTRA_PRED_AVAIL<0;1,0>:w 0x1:w // Left neighbor is available now
// Sub-macroblock 3 *****************
mov (16) REF_TOP0(0)<1> INTRA_REF_TOP0(0,8) // Top reference data
mov (8) REF_TOP0(0,16)<1> INTRA_REF_TOP0(0,24)REGION(8,1) // Top reference data
mov (4) REF_LEFT(0)<1> r[PPREDBUF_Y,PREDSUBBLK1+6]<8;1,0>:ub // Left reference data (top half)
mov (4) REF_LEFT(0,4)<1> r[PPREDBUF_Y,PREDSUBBLK3+6]<8;1,0>:ub // Left reference data (bottom half)
shr (4) PRED_MODE<1>:w INTRA_PRED_MODE(0,6)<1;2,0> 0x4040:v // Expand IntraPredMode to 1 byte/block
add (1) PPREDBUF_Y<1>:w PPREDBUF_Y<0;1,0>:w 4*GRFWIB:w // Pointer to predicted sub-macroblock 3
CALL(intra_Pred_4x4_Y_4,1)
// Pack constructed data from word-aligned to byte-aligned format
// to speed up save_4x4_Y module later
// PPREDBUF_Y now points to sub-block #12
mov (16) r[PPREDBUF_Y,-PREDSUBBLK4]<1>:ub r[PPREDBUF_Y,-PREDSUBBLK4]<32;16,2>:ub // Sub-block 8
mov (16) r[PPREDBUF_Y,0-PREDSUBBLK4+16]<1>:ub r[PPREDBUF_Y,-PREDSUBBLK3]<32;16,2>:ub // Sub-block 9
mov (16) r[PPREDBUF_Y,-PREDSUBBLK2]<1>:ub r[PPREDBUF_Y,-PREDSUBBLK2]<32;16,2>:ub // Sub-block 10
mov (16) r[PPREDBUF_Y,0-PREDSUBBLK2+16]<1>:ub r[PPREDBUF_Y,-PREDSUBBLK1]<32;16,2>:ub // Sub-block 11
mov (16) r[PPREDBUF_Y,-PREDSUBBLK3]<1>:ub r[PPREDBUF_Y]<32;16,2>:ub // Sub-block 12
mov (16) r[PPREDBUF_Y,0-PREDSUBBLK3+16]<1>:ub r[PPREDBUF_Y,PREDSUBBLK1]<32;16,2>:ub // Sub-block 13
mov (16) r[PPREDBUF_Y,-PREDSUBBLK1]<1>:ub r[PPREDBUF_Y,PREDSUBBLK2]<32;16,2>:ub // Sub-block 14
mov (16) r[PPREDBUF_Y,0-PREDSUBBLK1+16]<1>:ub r[PPREDBUF_Y,PREDSUBBLK3]<32;16,2>:ub // Sub-block 15
// All 4 sub-macroblock (containing 4 intra_4x4 blocks) have be constructed
// Save constructed Y picture
CALL(save_4x4_Y,1) // Save Intra_4x4 predicted luma data.
//
// Decode U/V blocks
//
// Note: The decoding for chroma blocks will be the same for all intra prediction mode
//
CALL(decode_Chroma_Intra,1)
#ifdef SW_SCOREBOARD
#include "scoreboard_update.asm"
#endif
// Terminate the thread
//
#include "EndIntraThread.asm"
// End of Intra_4x4
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