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6146 serge 1 
/* GRF allocation:
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   g1~g30: constant buffer
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           g1~g2:intra IQ matrix
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           g3~g4:non intra IQ matrix
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           g5~g20:IDCT table
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   g31:    thread payload
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   g58~g81:reference data
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   g82:    thread payload backup
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   g83~g106:IDCT data
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   g115:   message descriptor for reading reference data   */
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mov (1) g115.8<1>UD 0x07000FUD {align1}; // 8*16/32=4
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send (16) 0 g40.0<1>UW g115<8,8,1>UW read(surface_u, 2, 0, 2) mlen 1 rlen 4 {align1};//U
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send (16) 0 g44.0<1>UW g115<8,8,1>UW read(surface_v, 2, 0, 2) mlen 1 rlen 4 {align1};//V
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avg (16) g32.0<1>UW g40.0<16,8,1>UB g40.1<16,8,1>UB {align1};
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avg (16) g33.0<1>UW g41.0<16,8,1>UB g41.1<16,8,1>UB {align1};
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avg (16) g34.0<1>UW g42.0<16,8,1>UB g42.1<16,8,1>UB {align1};
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avg (16) g35.0<1>UW g43.0<16,8,1>UB g43.1<16,8,1>UB {align1};
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avg (16) g36.0<1>UW g44.0<16,8,1>UB g44.1<16,8,1>UB {align1};
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avg (16) g37.0<1>UW g45.0<16,8,1>UB g45.1<16,8,1>UB {align1};
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avg (16) g38.0<1>UW g46.0<16,8,1>UB g46.1<16,8,1>UB {align1};
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avg (16) g39.0<1>UW g47.0<16,8,1>UB g47.1<16,8,1>UB {align1};