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  1. /* GRF allocation:
  2.    g1~g30: constant buffer
  3.            g1~g2:intra IQ matrix
  4.            g3~g4:non intra IQ matrix
  5.            g5~g20:IDCT table
  6.    g31:    thread payload
  7.    g58~g81:reference data
  8.    g82:    thread payload backup
  9.    g83~g106:IDCT data
  10.    g115:   message descriptor for reading reference data   */
  11. mov (1) g32.8<1>UD 0x7000FUD {align1}; //8*16
  12. send (16) 0 g40.0<1>UW g32<8,8,1>UW read(surface_u, 2, 0, 2) mlen 1 rlen 4 {align1};//U
  13. send (16) 0 g44.0<1>UW g32<8,8,1>UW read(surface_v, 2, 0, 2) mlen 1 rlen 4 {align1};//V
  14. //U
  15. avg (8) g74.0<1>UW  g40.0<8,8,1>UB g40.1<8,8,1>UB {align1};
  16. avg (8) g74.16<1>UW g41.0<8,8,1>UB g41.1<8,8,1>UB {align1};
  17. avg (8) g75.0<1>UW  g42.0<8,8,1>UB g42.1<8,8,1>UB {align1};
  18. avg (8) g75.16<1>UW g43.0<8,8,1>UB g43.1<8,8,1>UB {align1};
  19. //V
  20. avg (8) g78.0<1>UW  g44.0<8,8,1>UB g44.1<8,8,1>UB {align1};
  21. avg (8) g78.16<1>UW g45.0<8,8,1>UB g45.1<8,8,1>UB {align1};
  22. avg (8) g79.0<1>UW  g46.0<8,8,1>UB g46.1<8,8,1>UB {align1};
  23. avg (8) g79.16<1>UW g47.0<8,8,1>UB g47.1<8,8,1>UB {align1};
  24.  
  25. add (1) g32.4<1>UD g32.4<1,1,1>UD 8UD {align1};
  26. send (16) 0 g40.0<1>UW g32<8,8,1>UW read(surface_u, 2, 0, 2) mlen 1 rlen 4 {align1};//U
  27. send (16) 0 g44.0<1>UW g32<8,8,1>UW read(surface_v, 2, 0, 2) mlen 1 rlen 4 {align1};//V
  28. //U
  29. avg (8) g76.0<1>UW  g40.0<8,8,1>UB g40.1<8,8,1>UB {align1};
  30. avg (8) g76.16<1>UW g41.0<8,8,1>UB g41.1<8,8,1>UB {align1};
  31. avg (8) g77.0<1>UW  g42.0<8,8,1>UB g42.1<8,8,1>UB {align1};
  32. avg (8) g77.16<1>UW g43.0<8,8,1>UB g43.1<8,8,1>UB {align1};
  33. //V                                              
  34. avg (8) g80.0<1>UW  g44.0<8,8,1>UB g44.1<8,8,1>UB {align1};
  35. avg (8) g80.16<1>UW g45.0<8,8,1>UB g45.1<8,8,1>UB {align1};
  36. avg (8) g81.0<1>UW  g46.0<8,8,1>UB g46.1<8,8,1>UB {align1};
  37. avg (8) g81.16<1>UW g47.0<8,8,1>UB g47.1<8,8,1>UB {align1};
  38.