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/*
* All Video Processing kernels
* 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: readSampler16x1.asm
//
// Read one row of pix through sampler
//
//#define SAMPLER_MSG_DSC 0x166A0000 // ILK Sampler Message Descriptor
// Send Message [DevILK] Message Descriptor
// MBZ MsgL=5 MsgR=8 H MBZ SIMD MsgType SmplrIndx BindTab
// 000 0 101 0 1000 1 0 10 0000 0000 00000000
// 0 A 8 A 0 0 0 0
// MsgL=1+2*2(u,v)=5 MsgR=8
#define SAMPLER_MSG_DSC 0x0A8A0000 // ILK Sampler Message Descriptor
// Assume MSGSRC is set already in the caller
//mov (8) rMSGSRC.0<1>:ud 0:ud // Unused fileds
// Read 16 sampled pixels and stored them in float32 in 8 GRFs
// 422 data is expanded to 444, return 8 GRF in the order of RGB- (UYV-).
// 420 data has three surfaces, return 8 GRF. Valid is always in the 1st GRF when in R8. Make sure no overwrite the following 3 GRFs.
// alpha data is expanded to 4444, return 8 GRF in the order of RGBA (UYVA).
mov(16) mMSGHDR<1>:uw rMSGSRC<16;16,1>:uw
send (16) DATABUF(0)<1> mMSGHDR udDUMMY_NULL 0x2 SAMPLER_MSG_DSC+SAMPLER_IDX+BINDING_IDX:ud
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