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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: Transpose_UV_8x8.asm
//
// Transpose a 8x8 UV block. (8x8U + 8x8V) The output is also in NV12
//
//----------------------------------------------------------------------------------------
// Symbols need to be defined before including this module
//
// Source region is :ub
// SRC_UW: SRC_UW Base=rxx ElementSize=2 SrcRegion=REGION(8,1) Type=uw // 4 GRFs
//
// Temp buffer:
// BUF_W: BUF_W Base=rxx ElementSize=2 SrcRegion=REGION(8,1) Type=uw // 4 GRFs
//
//////////////////////////////////////////////////////////////////////////////////////////
#if defined(_DEBUG)
mov (1) EntrySignatureC:w 0xDDDA:w
#endif
//////////////////////////////////////////////////////////////////////////////////////////////////////////
// Src U and V are mixed in NV12 format. U on even bytes, V on odd bytes.
// Transpose by treating UV pair as a word.
// Src U 8x8 and V 8x8 are mixed. (each pix is specified as yx)
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |17 17 16 16 15 15 14 14 13 13 12 12 11 11 10 10 07 07 06 06 05 05 04 04 03 03 02 02 01 01 00 00|
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |37 37 36 36 35 35 34 34 33 33 32 32 31 31 30 30 27 27 26 26 25 25 24 24 23 23 22 22 21 21 20 20|
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |57 57 56 56 55 55 54 54 53 53 52 52 51 51 50 50 47 47 46 46 45 45 44 44 43 43 42 42 41 41 40 40|
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |77 77 76 76 75 75 74 74 73 73 72 72 71 71 70 70 67 67 66 66 65 65 64 64 63 63 62 62 61 61 60 60|
// +-----------------------+-----------------------+-----------------------+-----------------------+
// First step (16) <1>:w <==== <8;4,1>:w
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |33 33 32 32 31 31 30 30 23 23 22 22 21 21 20 20 13 13 12 12 11 11 10 10 03 03 02 02 01 01 00 00|
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |73 73 72 72 71 71 70 70 63 63 62 62 61 61 60 60 53 53 52 52 51 51 50 50 43 43 42 42 41 41 40 40|
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |37 37 36 36 35 35 34 34 27 27 26 26 25 25 24 24 17 17 16 16 15 15 14 14 07 07 06 06 05 05 04 04|
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |77 77 76 76 75 75 74 74 67 67 66 66 65 65 64 64 57 57 56 56 55 55 54 54 47 47 46 46 45 45 44 44|
// +-----------------------+-----------------------+-----------------------+-----------------------+
//
// Transpose UV (8x8 words), The first step
mov (16) CUR_TEMP_W(0,0)<1> SRC_UW(0,0)<8;4,1>
mov (16) CUR_TEMP_W(1,0)<1> SRC_UW(2,0)<8;4,1>
mov (16) CUR_TEMP_W(2,0)<1> SRC_UW(0,4)<8;4,1>
mov (16) CUR_TEMP_W(3,0)<1> SRC_UW(2,4)<8;4,1>
// Second step (16) <1>:w <=== <16;4,4>:w
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |71 71 61 61 51 51 41 41 31 31 21 21 11 11 01 01 70 70 60 60 50 50 40 40 30 30 20 20 10 10 00 00|
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |73 73 63 63 53 53 43 43 33 33 23 23 13 13 03 03 72 72 62 62 52 52 42 42 32 32 22 22 12 12 02 02|
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |75 75 65 65 55 55 45 45 35 35 25 25 15 15 05 05 74 74 64 64 54 54 44 44 34 34 24 24 14 14 04 04|
// +-----------------------+-----------------------+-----------------------+-----------------------+
// |77 77 67 67 57 57 47 47 37 37 27 27 17 17 07 07 76 76 66 66 56 56 46 46 36 36 26 26 16 16 06 06|
// +-----------------------+-----------------------+-----------------------+-----------------------+
//
// Transpose UV (8x8 words), The second step
mov (8) SRC_UW(0,0)<1> CUR_TEMP_W(0,0)<16;4,4> { NoDDClr }
mov (8) SRC_UW(0,8)<1> CUR_TEMP_W(0,1)<16;4,4> { NoDDChk }
mov (8) SRC_UW(1,0)<1> CUR_TEMP_W(0,2)<16;4,4> { NoDDClr }
mov (8) SRC_UW(1,8)<1> CUR_TEMP_W(0,3)<16;4,4> { NoDDChk }
mov (8) SRC_UW(2,0)<1> CUR_TEMP_W(2,0)<16;4,4> { NoDDClr }
mov (8) SRC_UW(2,8)<1> CUR_TEMP_W(2,1)<16;4,4> { NoDDChk }
mov (8) SRC_UW(3,0)<1> CUR_TEMP_W(2,2)<16;4,4> { NoDDClr }
mov (8) SRC_UW(3,8)<1> CUR_TEMP_W(2,3)<16;4,4> { NoDDChk }
// U and V are now transposed and separated.
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