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/*
* Load all reference U/V samples from neighboring macroblocks
* 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.
*
*/
#if !defined(__LOAD_INTRA_REF_UV__) // Make sure this is only included once
#define __LOAD_INTRA_REF_UV__
// Module name: load_Intra_Ref_UV.asm
//
// Load all reference U/V samples from neighboring macroblocks
//
// Note: Since loading of U/V data always follows writing of Y, the message descriptor is manipulated
// to avoid recalculating due to frame/field variztions.
// First load top 20x1 row U/V reference samples
// 4 from macroblock D (actually use 2), 16 from macroblock B
//
shr (1) I_ORIY<1>:w I_ORIY<0;1,0>:w 1:w // Adjust I_ORIY for NV12 format
add (2) MSGSRC.0<1>:d I_ORIX<2;2,1>:w TOP_REF_OFFSET<2;2,1>:b {NoDDClr} // Reference samples positioned at (-4, -1)
mov (1) MSGSRC.2:ud 0x00000013:ud {NoDDChk} // Block width and height (20x1)
// Update message descriptor based on previous Y block write
//
#ifdef DEV_ILK
add (1) MSGDSC MSGDSC RESP_LEN(1)+DWBRMSGDSC_RC+DESTUV-DWBWMSGDSC_WC-0x10000000-DESTY:ud // Set message descriptor
#else
add (1) MSGDSC MSGDSC RESP_LEN(1)+DWBRMSGDSC_RC+DESTUV-DWBWMSGDSC_WC-0x00800000-DESTY:ud // Set message descriptor
#endif // DEV_ILK
send (8) INTRA_REF_TOP_D(0) MSGHDR MSGSRC<8;8,1>:ud DAPREAD MSGDSC
// Then load left 4x8 reference samples (actually use 1x8 column)
//
add (1) MSGSRC.1<1>:d MSGSRC.1<0;1,0>:d 1:w {NoDDClr} // Reference samples positioned next row
mov (1) MSGSRC.2:ud 0x00070003:ud {NoDDChk} // Block width and height (4x8)
send (8) INTRA_REF_LEFT_D(0) MSGHDRUV MSGSRC<8;8,1>:ud DAPREAD MSGDSC
// End of load_Intra_Ref_UV
#endif // !defined(__LOAD_INTRA_REF_UV__)
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