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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5361 | serge | 1 | /* |
| 2 | * Intra predict 4 Intra_4x4 luma blocks |
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| 3 | * Copyright © <2010>, Intel Corporation. |
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| 4 | * |
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| 5 | * This program is licensed under the terms and conditions of the |
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| 6 | * Eclipse Public License (EPL), version 1.0. The full text of the EPL is at |
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| 7 | * http://www.opensource.org/licenses/eclipse-1.0.php. |
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| 8 | * |
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| 9 | */ |
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| 10 | #if !defined(__INTRA_PRED_4X4_Y_4__) // Make sure this is only included once |
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| 11 | #define __INTRA_PRED_4X4_Y_4__ |
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| 12 | |||
| 13 | // Module name: intra_Pred_4x4_Y_4.asm |
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| 14 | // |
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| 15 | // Intra predict 4 Intra_4x4 luma blocks |
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| 16 | // |
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| 17 | //-------------------------------------------------------------------------- |
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| 18 | // Input data: |
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| 19 | // |
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| 20 | // REF_TOP: Top reference data stored in BYTE with p[-1,-1] at REF_TOP(0,-1) |
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| 21 | // REF_LEFT: Left reference data stored in BYTE with p[-1,0] at REF_LEFT(0,0) |
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| 22 | // PRED_MODE: Intra prediction mode stored in 4 words (4 LSB) |
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| 23 | // REG_INTRA_PRED_AVAIL: Top/Left available flag, (Bit0: Left, Bit1: Top) |
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| 24 | // |
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| 25 | //-------------------------------------------------------------------------- |
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| 26 | |||
| 27 | #undef INTRA_PRED_AVAIL |
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| 28 | #undef INTRA_REF |
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| 29 | #undef REF_LEFT_BACK |
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| 30 | #undef REF_TMP |
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| 31 | #undef REF_TMP1 |
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| 32 | |||
| 33 | #define INTRA_PRED_AVAIL REG_INTRA_TEMP_2.8 |
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| 34 | #define INTRA_REF REG_INTRA_TEMP_2 |
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| 35 | #define REF_LEFT_BACK REG_INTRA_TEMP_8 |
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| 36 | #define REF_TMP REG_INTRA_TEMP_3 |
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| 37 | #define REF_TMP1 REG_INTRA_TEMP_4 |
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| 38 | |||
| 39 | intra_Pred_4x4_Y_4: |
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| 40 | |||
| 41 | mov (8) REF_LEFT_BACK<1>:ub REF_LEFT(0)REGION(8,1) // Store left referece data |
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| 42 | // Set up pointers to each intra_4x4 prediction mode |
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| 43 | // |
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| 44 | and (4) PINTRA4X4_Y<1>:w PRED_MODE<4;4,1>:w 0x0F:w |
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| 45 | add (4) INTRA_4X4_MODE(0) r[PINTRA4X4_Y, INTRA_4X4_OFFSET]<1,0>:ub INTRA_MODE<4;4,1>:ub |
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| 46 | |||
| 47 | // Sub-block 0 ***************** |
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| 48 | mov (1) INTRA_PRED_AVAIL<1>:w REG_INTRA_PRED_AVAIL<0;1,0>:w // Top/Left neighbor available flags |
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| 49 | CALL_1(INTRA_4X4_MODE(0),1) |
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| 50 | |||
| 51 | // Add error data to predicted intra data |
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| 52 | ADD_ERROR_SB0: |
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| 53 | add.sat (8) r[PPREDBUF_Y,PREDSUBBLK0]<2>:ub r[PERROR,ERRBLK0]<8;4,1>:w REG_INTRA_4X4_PRED<8;8,1>:w // Too bad indexed src can't |
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| 54 | add.sat (8) r[PPREDBUF_Y,PREDSUBBLK0+16]<2>:ub r[PERROR,ERRBLK0+32]<8;4,1>:w REG_INTRA_4X4_PRED.8<8;8,1>:w // cross 2 GRFs |
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| 55 | |||
| 56 | // Sub-block 1 ***************** |
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| 57 | mov (16) REF_TOP0(0)<1> REF_TOP0(0,4)REGION(8,1) // Top reference data |
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| 58 | mov (4) REF_LEFT(0)<1> r[PPREDBUF_Y,PREDSUBBLK0+6]<8;1,0>:ub // New left referece data from sub-block 0 |
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| 59 | or (1) INTRA_PRED_AVAIL<1>:w REG_INTRA_PRED_AVAIL<0;1,0>:w 1:w // Left neighbor is available |
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| 60 | CALL_1(INTRA_4X4_MODE(0,1),1) |
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| 61 | |||
| 62 | // Add error data to predicted intra data |
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| 63 | ADD_ERROR_SB1: |
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| 64 | add.sat (8) r[PPREDBUF_Y,PREDSUBBLK1]<2>:ub r[PERROR,ERRBLK1]<8;4,1>:w REG_INTRA_4X4_PRED<8;8,1>:w // Too bad indexed src can't |
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| 65 | add.sat (8) r[PPREDBUF_Y,PREDSUBBLK1+16]<2>:ub r[PERROR,ERRBLK1+32]<8;4,1>:w REG_INTRA_4X4_PRED.8<8;8,1>:w // cross 2 GRFs |
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| 66 | |||
| 67 | // Sub-block 2 ***************** |
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| 68 | mov (1) REF_TOP0(0,3)<1> REF_LEFT_BACK.3<0;1,0>:ub // Top-left reference data from stored left referece data |
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| 69 | mov (4) REF_TOP0(0,4)<1> r[PPREDBUF_Y,PREDSUBBLK0+24]REGION(4,2):ub // Top reference data |
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| 70 | mov (4) REF_TOP0(0,8)<1> r[PPREDBUF_Y,PREDSUBBLK0+24+32]REGION(4,2):ub // Too bad indexed src can't cross 2 GRFs |
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| 71 | mov (4) REF_TOP0(0,12)<1> r[PPREDBUF_Y,PREDSUBBLK0+30+32]REGION(1,0):ub // Extended top-right reference data |
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| 72 | mov (4) REF_LEFT(0)<1> REF_LEFT_BACK.4<4;4,1>:ub // From stored left referece data |
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| 73 | or (1) INTRA_PRED_AVAIL<1>:w REG_INTRA_PRED_AVAIL<0;1,0>:w 2:w // Top neighbor is available |
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| 74 | CALL_1(INTRA_4X4_MODE(0,2),1) |
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| 75 | |||
| 76 | // Add error data to predicted intra data |
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| 77 | ADD_ERROR_SB2: |
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| 78 | add.sat (8) r[PPREDBUF_Y,PREDSUBBLK2]<2>:ub r[PERROR,ERRBLK2]<8;4,1>:w REG_INTRA_4X4_PRED<8;8,1>:w // Too bad indexed src can't |
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| 79 | add.sat (8) r[PPREDBUF_Y,PREDSUBBLK2+16]<2>:ub r[PERROR,ERRBLK2+32]<8;4,1>:w REG_INTRA_4X4_PRED.8<8;8,1>:w // cross 2 GRFs |
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| 80 | |||
| 81 | // Sub-block 3 ***************** |
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| 82 | mov (16) REF_TOP0(0)<1> REF_TOP0(0,4)REGION(8,1) // Top reference data |
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| 83 | mov (8) REF_TOP0(0,8)<1> REF_TOP0(0,7)<0;1,0> // Extended top-right reference data |
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| 84 | mov (4) REF_LEFT(0)<1> r[PPREDBUF_Y,PREDSUBBLK2+6]<8;1,0>:ub // Left referece data from sub-block 0 |
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| 85 | or (1) INTRA_PRED_AVAIL<1>:w REG_INTRA_PRED_AVAIL<0;1,0>:w 3:w // Top/Left neighbor are available |
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| 86 | CALL_1(INTRA_4X4_MODE(0,3),1) |
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| 87 | |||
| 88 | // Add error data to predicted intra data |
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| 89 | ADD_ERROR_SB3: |
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| 90 | add.sat (8) r[PPREDBUF_Y,PREDSUBBLK3]<2>:ub r[PERROR,ERRBLK3]<8;4,1>:w REG_INTRA_4X4_PRED<8;8,1>:w // Too bad indexed src can't |
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| 91 | add.sat (8) r[PPREDBUF_Y,PREDSUBBLK3+16]<2>:ub r[PERROR,ERRBLK3+32]<8;4,1>:w REG_INTRA_4X4_PRED.8<8;8,1>:w // cross 2 GRFs |
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| 92 | |||
| 93 | RETURN |
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| 94 | |||
| 95 | //-------------------------------------------------------------------------- |
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| 96 | // Actual module that performs Intra_4x4 prediction and construction |
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| 97 | // |
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| 98 | // REF_TOP: Top reference data stored in BYTE with p[-1,-1] at REF_TOP(0,-1) |
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| 99 | // REF_LEFT: Left reference data stored in BYTE with p[-1,0] at REF_LEFT(0,0) |
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| 100 | // PINTRA4X4_Y: Intra prediction mode |
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| 101 | // INTRA_PRED_AVAIL: Top/Left available flag, (Bit0: Left, Bit1: Top) |
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| 102 | // |
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| 103 | // Output data: |
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| 104 | // |
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| 105 | // REG_INTRA_4X4_PRED: Predicted 4x4 block data stored in 1 GRF register |
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| 106 | //-------------------------------------------------------------------------- |
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| 107 | intra_Pred_4x4_Y: |
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| 108 | // Mode 0 |
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| 109 | INTRA_4X4_VERTICAL: |
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| 110 | mov (16) REG_INTRA_4X4_PRED<1>:w REF_TOP(0)<0;4,1> |
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| 111 | RETURN_1 |
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| 112 | |||
| 113 | // Mode 1 |
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| 114 | INTRA_4X4_HORIZONTAL: |
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| 115 | mov (16) REG_INTRA_4X4_PRED<1>:w REF_LEFT(0)<1;4,0> |
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| 116 | RETURN_1 |
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| 117 | |||
| 118 | // Mode 2 |
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| 119 | INTRA_4X4_DC: |
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| 120 | // Rearrange reference samples for unified DC prediction code |
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| 121 | // |
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| 122 | and.nz.f0.0 (16) NULLREG INTRA_PRED_AVAIL<0;1,0>:w 2:w {Compr} |
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| 123 | and.nz.f0.1 (16) NULLREG INTRA_PRED_AVAIL<0;1,0>:w 1:w {Compr} |
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| 124 | (-f0.0.any16h) mov (16) REF_TOP_W(0)<1> 0x8080:uw // Top macroblock not available for intra prediction |
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| 125 | (-f0.1.any8h) mov (8) REF_LEFT(0)<1> REF_TOP(0)REGION(8,1) // Left macroblock not available for intra prediction |
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| 126 | (-f0.0.any8h) mov (8) REF_TOP(0)<1> REF_LEFT(0)REGION(8,1) // Top macroblock not available for intra prediction |
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| 127 | // Perform DC prediction |
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| 128 | // |
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| 129 | add (4) PRED_YW(15)<1> REF_TOP(0)REGION(4,1) REF_LEFT(0)REGION(4,1) |
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| 130 | add (2) PRED_YW(15)<1> PRED_YW(15)REGION(2,1) PRED_YW(15,2)REGION(2,1) |
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| 131 | add (16) acc0<1>:w PRED_YW(15)REGION(1,0) PRED_YW(15,1)REGION(1,0) |
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| 132 | add (16) acc0<1>:w acc0:w 4:w |
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| 133 | shr (16) REG_INTRA_4X4_PRED<1>:w acc0:w 3:w |
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| 134 | RETURN_1 |
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| 135 | |||
| 136 | // Mode 3 |
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| 137 | INTRA_4X4_DIAG_DOWN_LEFT: |
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| 138 | mov (8) INTRA_REF<1>:ub REF_TOP(0)REGION(8,1) // Keep REF_TOP untouched for future use |
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| 139 | mov (4) INTRA_REF.8<1>:ub REF_TOP(0,7)REGION(4,1) // p[8,-1] = p[7,-1] |
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| 140 | add (8) acc0<1>:w INTRA_REF.2<8;8,1> 2:w // p[x+2]+2 |
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| 141 | mac (8) acc0<1>:w INTRA_REF.1<8;8,1> 2:w // 2*p[x+1]+p[x+2]+2 |
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| 142 | mac (8) PRED_YW(15)<1> INTRA_REF.0<8;8,1> 1:w // p[x]+2*p[x+1]+p[x+2]+2 |
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| 143 | |||
| 144 | shr (16) REG_INTRA_4X4_PRED<1>:w PRED_YW(15)<1;4,1> 2:w // (p[x]+2*p[x+1]+p[x+2]+2)>>2 |
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| 145 | RETURN_1 |
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| 146 | |||
| 147 | // Mode 4 |
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| 148 | INTRA_4X4_DIAG_DOWN_RIGHT: |
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| 149 | |||
| 150 | // Set inverse shift count |
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| 151 | shl (4) REF_TMP<1>:ud REF_LEFT_D(0)REGION(1,0) INV_SHIFT<4;4,1>:b |
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| 152 | mov (8) INTRA_REF.4<1>:ub REF_TOP(0,-1)REGION(8,1) // INTRA_REF holds all reference data |
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| 153 | mov (4) INTRA_REF<1>:ub REF_TMP.3<16;4,4>:ub |
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| 154 | |||
| 155 | add (8) acc0<1>:w INTRA_REF.2<8;8,1>:ub 2:w // p[x+2]+2 |
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| 156 | mac (8) acc0<1>:w INTRA_REF.1<8;8,1>:ub 2:w // 2*p[x+1]+p[x+2]+2 |
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| 157 | mac (8) INTRA_REF<1>:w INTRA_REF<8;8,1>:ub 1:w // p[x]+2*p[x+1]+p[x+2]+2 |
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| 158 | |||
| 159 | // Store data in reversed order |
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| 160 | add (4) PBWDCOPY_4<1>:w INV_TRANS4<4;4,1>:b INTRA_TEMP_2*GRFWIB:w // Must match with INTRA_REF |
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| 161 | shr (16) REG_INTRA_4X4_PRED<1>:w r[PBWDCOPY_4]<4,1>:w 2:w |
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| 162 | RETURN_1 |
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| 163 | |||
| 164 | // Mode 5 |
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| 165 | INTRA_4X4_VERT_RIGHT: |
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| 166 | |||
| 167 | // Set inverse shift count |
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| 168 | shl (4) REF_TMP<1>:ud REF_LEFT_D(0)REGION(1,0) INV_SHIFT<4;4,1>:b |
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| 169 | mov (8) INTRA_REF.4<1>:ub REF_TOP(0,-1)REGION(8,1) // INTRA_REF holds all reference data |
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| 170 | mov (4) INTRA_REF<1>:ub REF_TMP.3<16;4,4>:ub |
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| 171 | |||
| 172 | // Even rows |
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| 173 | avg (8) PRED_YW(14)<1> INTRA_REF.4<8;8,1> INTRA_REF.5<8;8,1> // avg(p[x-1],p[x]) |
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| 174 | // Odd rows |
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| 175 | add (8) acc0<1>:w INTRA_REF.3<8;8,1>:ub 2:w // p[x]+2 |
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| 176 | mac (8) acc0<1>:w INTRA_REF.2<8;8,1>:ub 2:w // 2*p[x-1]+p[x]+2 |
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| 177 | mac (8) acc0<1>:w INTRA_REF.1<8;8,1>:ub 1:w // p[x-2]+2*p[x-1]+p[x]+2 |
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| 178 | shr (8) INTRA_REF<1>:w acc0:w 2:w // (p[x-2]+2*p[x-1]+p[x]+2)>>2 |
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| 179 | |||
| 180 | mov (4) INTRA_REF.2<2>:w INTRA_REF.2<4;4,1>:w // Keep zVR = -2,-3 unchanged |
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| 181 | mov (4) INTRA_REF.3<2>:w PRED_YW(14)REGION(4,1) // Combining even rows |
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| 182 | |||
| 183 | add (4) PBWDCOPY_4<1>:w INV_TRANS4<4;4,1>:b INTRA_TEMP_2*GRFWIB:w // Must match with INTRA_REF |
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| 184 | mov (16) REG_INTRA_4X4_PRED<1>:w r[PBWDCOPY_4]<4,2>:w |
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| 185 | RETURN_1 |
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| 186 | |||
| 187 | // Mode 6 |
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| 188 | INTRA_4X4_HOR_DOWN: |
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| 189 | // Set inverse shift count |
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| 190 | shl (4) REF_TMP<1>:ud REF_LEFT_D(0)REGION(1,0) INV_SHIFT<4;4,1>:b |
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| 191 | mov (8) INTRA_REF.4<1>:ub REF_TOP(0,-1)REGION(8,1) // INTRA_REF holds all reference data |
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| 192 | mov (4) INTRA_REF<1>:ub REF_TMP.3<16;4,4>:ub |
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| 193 | |||
| 194 | // Even pixels |
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| 195 | avg (8) PRED_YW(14)<1> INTRA_REF<8;8,1> INTRA_REF.1<8;8,1> // avg(p[y-1],p[y]) |
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| 196 | // Odd pixels |
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| 197 | add (8) acc0<1>:w INTRA_REF.2<8;8,1>:ub 2:w // p[y]+2 |
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| 198 | mac (8) acc0<1>:w INTRA_REF.1<8;8,1>:ub 2:w // 2*p[y-1]+p[y]+2 |
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| 199 | mac (8) REF_TMP<1>:w INTRA_REF.0<8;8,1>:ub 1:w // p[y-2]+2*p[y-1]+p[y]+2 |
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| 200 | shr (4) INTRA_REF.1<2>:w REF_TMP<4;4,1>:w 2:w // (p[y-2]+2*p[y-1]+p[y]+2)>>2 |
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| 201 | |||
| 202 | shr (2) INTRA_REF.8<1>:w REF_TMP.4<2;2,1>:w 2:w // Keep zVR = -2,-3 unchanged |
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| 203 | mov (4) INTRA_REF.0<2>:w PRED_YW(14)REGION(4,1) // Combining even pixels |
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| 204 | |||
| 205 | shl (4) PBWDCOPY_4<1>:w INV_TRANS4<4;4,1>:b 1:w // Convert to WORD offset |
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| 206 | add (4) PBWDCOPY_4<1>:w PBWDCOPY_4<4;4,1>:w INTRA_TEMP_2*GRFWIB:w // Must match with INTRA_REF |
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| 207 | mov (16) REG_INTRA_4X4_PRED<1>:w r[PBWDCOPY_4]<4,1>:w |
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| 208 | RETURN_1 |
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| 209 | |||
| 210 | // Mode 7 |
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| 211 | INTRA_4X4_VERT_LEFT: |
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| 212 | // Even rows |
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| 213 | avg (8) PRED_YW(14)<2> REF_TOP(0)REGION(8,1) REF_TOP(0,1)REGION(8,1) // avg(p[x],p[x+1]) |
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| 214 | // Odd rows |
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| 215 | add (8) acc0<1>:w REF_TOP(0,2)REGION(8,1) 2:w // p[x+2]+2 |
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| 216 | mac (8) acc0<1>:w REF_TOP(0,1)REGION(8,1) 2:w // 2*p[x+1]+p[x+2]+2 |
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| 217 | mac (8) PRED_YW(15)<1> REF_TOP(0)REGION(8,1) 1:w // p[x]+2*p[x+1]+p[x+2]+2 |
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| 218 | shr (8) PRED_YW(14,1)<2> PRED_YW(15)REGION(8,1) 2:w |
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| 219 | |||
| 220 | mov (16) REG_INTRA_4X4_PRED<1>:w PRED_YW(14)<1;4,2> |
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| 221 | RETURN_1 |
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| 222 | |||
| 223 | // Mode 8 |
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| 224 | INTRA_4X4_HOR_UP: |
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| 225 | // Set extra left reference pixels for unified prediction |
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| 226 | mov (8) REF_LEFT(0,4)<1> REF_LEFT(0,3)REGION(1,0) // Copy p[-1,3] to p[-1,y],y=4...7 |
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| 227 | // Even pixels |
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| 228 | avg (8) PRED_YW(14)<2> REF_LEFT(0)REGION(8,1) REF_LEFT(0,1)REGION(8,1) // avg(p[y],p[y+1]) |
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| 229 | // Odd pixels |
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| 230 | add (8) acc0<1>:w REF_LEFT(0,2)REGION(8,1) 2:w // p[y+2]+2 |
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| 231 | mac (8) acc0<1>:w REF_LEFT(0,1)REGION(8,1) 2:w // 2*p[y+1]+p[y+2]+2 |
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| 232 | mac (8) PRED_YW(15)<1> REF_LEFT(0)REGION(8,1) 1:w // p[y]+2*p[y+1]+p[y+2]+2 |
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| 233 | shr (8) PRED_YW(14,1)<2> PRED_YW(15)REGION(8,1) 2:w // (p[y]+2*p[y+1]+p[y+2]+2)>>2 |
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| 234 | |||
| 235 | mov (16) REG_INTRA_4X4_PRED<1>:w PRED_YW(14)<2;4,1> |
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| 236 | RETURN_1 |
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| 237 | |||
| 238 | // End of intra_Pred_4x4_Y_4 |
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| 239 | |||
| 240 | #endif // !defined(__INTRA_PRED_4X4_Y_4__) |