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  1. /*
  2.  * Copyright © <2010>, Intel Corporation.
  3.  *
  4.  * Permission is hereby granted, free of charge, to any person obtaining a
  5.  * copy of this software and associated documentation files (the
  6.  * "Software"), to deal in the Software without restriction, including
  7.  * without limitation the rights to use, copy, modify, merge, publish,
  8.  * distribute, sub license, and/or sell copies of the Software, and to
  9.  * permit persons to whom the Software is furnished to do so, subject to
  10.  * the following conditions:
  11.  *
  12.  * The above copyright notice and this permission notice (including the
  13.  * next paragraph) shall be included in all copies or substantial portions
  14.  * of the Software.
  15.  *
  16.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  19.  * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
  20.  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  21.  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  22.  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23.  *
  24.  * This file was originally licensed under the following license
  25.  *
  26.  *  Licensed under the Apache License, Version 2.0 (the "License");
  27.  *  you may not use this file except in compliance with the License.
  28.  *  You may obtain a copy of the License at
  29.  *
  30.  *      http://www.apache.org/licenses/LICENSE-2.0
  31.  *
  32.  *  Unless required by applicable law or agreed to in writing, software
  33.  *  distributed under the License is distributed on an "AS IS" BASIS,
  34.  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  35.  *  See the License for the specific language governing permissions and
  36.  *  limitations under the License.
  37.  *
  38.  */
  39. // Module name: WriteURB_Child.asm
  40. //
  41. // General purpose module to write data to URB using the URB handle/offset in r0
  42. //
  43. //----------------------------------------------------------------
  44. //      Assume:
  45. //      - a0.0 and a0.1 is meg desc, has been assign with URB offset and msg size
  46. //      - MRFs are alrady assigned with data.
  47. //----------------------------------------------------------------
  48. //
  49. //  16x16 byte pixel block can be saved using just 1 "send" instruction.
  50.  
  51. #if defined(_DEBUG)
  52.         mov             (1)             EntrySignatureC:w                       0x3535:w
  53. #endif
  54.  
  55. // URB write header:
  56. //mov (8) MSGSRC.0:ud   r0.0<8;8,1>:ud                  // Copy parent R0 header
  57.  
  58. //shr (1)       Temp2_W:uw      URBOffsetC:uw   1:w     // divide by 2, because URB entry is counted by 512bits.  Offset is counted by 256bits.
  59. //add (1) MSGSRC.0:uw           r0.0:uw         Temp2_W:uw     
  60.  
  61. shr (1) MSGSRC.0:uw             URBOffsetC:uw   1:w     // divide by 2, because URB entry is counted by 512bits.  Offset is counted by 256bits.
  62.  
  63. //mov (1) MSGSRC.1:ud   0:ud                                    // Reset Handle 1
  64.  
  65.         // URB write 1 MRFs,
  66.         // Current MB offset is in URBOffset, use it as write origin
  67.         // Add 2 to offset to store data be be passed to the right MB
  68.  
  69. send  null:uw   m0        MSGSRC<8;8,1>:uw              URBWRITE        MSG_LEN(1)+URBWMSGDSC+0x20 // URB write
  70.