/*
* Interpolation kernel for chrominance 4x4 motion compensation
* Copyright © <2010>, Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* This file was originally licensed under the following license
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Kernel name: Interpolate_C_4x4_Func.asm
//
// Interpolation kernel for chrominance 4x4 motion compensation
//
// $Revision: 8 $
// $Date: 10/09/06 4:00p $
//
//#if !defined(__Interpolate_C_4x4_Func__) // Make sure this is only included once
//#define __Interpolate_C_4x4_Func__
INTERLABEL(Interpolate_C_4x4_Func):
// (8-xFrac) and (8-yFrac)
add (2) gW0<1>:w gMVX_FRACC<2;2,1>:w -0x08:w
// Compute the GRF address of the starting position of the reference area
mov (1) pREF0:w nOFFSET_REFC:w {NoDDClr}
mov (1) pREF1:uw nOFFSET_REFC+16:w {NoDDChk,NoDDClr}
mov (1) pRESULT:uw gpINTPC:uw {NoDDChk}
// gCOEFA = (8-xFrac)*(8-yFrac)
// gCOEFB = xFrac*(8-yFrac)
// gCOEFC = (8-xFrac)*yFrac
// gCOEFD = xFrac*yFrac
mul (1) gCOEFD:w gMVX_FRACC:w gMVY_FRACC:w {NoDDClr}
mul (1) gCOEFA:w -gW0:w -gW1:uw {NoDDClr,NoDDChk}
mul (1) gCOEFB:w gMVX_FRACC:w -gW1:uw {NoDDClr,NoDDChk}
mul (1) gCOEFC:w -gW0:w gMVY_FRACC:w {NoDDChk}
add (2) gW0<1>:uw pREF0<2;2,1>:uw 16:w
// (8-xFrac)*(8-yFrac)*A
// ---------------------
mul (16) acc0<1>:uw r[pREF0,0]<16;8,1>:ub gCOEFA:uw
mul (16) acc1<1>:uw r[pREF0,nGRFWIB]<16;8,1>:ub gCOEFA:uw
// xFrac*(8-yFrac)*B
// -------------------
mac (16) acc0<1>:uw r[pREF0,2]<16;8,1>:ub gCOEFB:uw
mac (16) acc1<1>:uw r[pREF0,nGRFWIB+2]<16;8,1>:ub gCOEFB:uw
// (8-xFrac)*yFrac*C
// -------------------
mov (2) pREF0<1>:uw gW0<2;2,1>:uw
mac (16) acc0<1>:uw r[pREF0,0]<8,1>:ub gCOEFC:uw
mac (16) acc1<1>:uw r[pREF0,nGRFWIB]<8,1>:ub gCOEFC:uw
// xFrac*yFrac*D
// -----------------
mac (16) r[pRESULT]<1>:uw r[pREF0,2]<8,1>:ub gCOEFD:uw
mac (16) r[pRESULT,GRFWIB]<1>:uw r[pREF0,nGRFWIB+2]<8,1>:ub gCOEFD:uw {SecHalf}
//#endif // !defined(__Interpolate_C_4x4_Func__)