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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5361 | serge | 1 | /* |
| 2 | * Copyright © <2010>, Intel Corporation. |
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| 3 | * |
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| 4 | * This program is licensed under the terms and conditions of the |
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| 5 | * Eclipse Public License (EPL), version 1.0. The full text of the EPL is at |
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| 6 | * http://www.opensource.org/licenses/eclipse-1.0.php. |
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| 7 | * |
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| 8 | */ |
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| 9 | //=============== Spawn a child thread for Luma or Chroma =============== |
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| 10 | |||
| 11 | //----- Create child thread R0 header ----- |
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| 12 | #if defined(_DEBUG) |
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| 13 | mov (1) EntrySignature:w 0xAAAA:w |
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| 14 | #endif |
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| 15 | |||
| 16 | //***** Set CT_R0Hdr fields that change for every thread |
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| 17 | |||
| 18 | // Restore CT_R0Hdr.4:ud to r0.4:ud |
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| 19 | mov (1) CT_R0Hdr.4:ud r0.4:ud |
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| 20 | |||
| 21 | // R0.2: Interface Discriptor Ptr. Add a child offset for child kernel |
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| 22 | // add (1) CT_R0Hdr.2:ud r0.2:ud CHILD_OFFSET:w |
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| 23 | |||
| 24 | // Assign a new Thread Count for this child |
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| 25 | mov (1) CT_R0Hdr.6:ud ChildThreadsID:uw |
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| 26 | |||
| 27 | //----- Prepare URB for launching a child thread ----- |
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| 28 | mov (16) m2.0:w ChildParam<16;16,1>:w |
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| 29 | |||
| 30 | shr (1) MRF0.0:uw URBOffset:uw 1:w |
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| 31 | |||
| 32 | add (1) ChildThreadsID:uw ChildThreadsID:uw 2:uw // Luma child=even, chroma child=odd |
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| 33 | |||
| 34 | //-------------------------------------------------- |
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| 35 | // #include "writeURB.asm" |
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| 36 | send null:uw MRF0 null:ud URBWRITE URBWriteMsgDesc:ud // URB write |
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| 37 | |||
| 38 | //-------------------------------------------------- |
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| 39 | // Set URB handle for child thread launching: |
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| 40 | // URB handle Length (bit 15:10) - 0000 0000 0000 0000 yyyy yy00 0000 0000 |
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| 41 | // URB handle offset (bit 9:0) - 0000 0000 0000 0000 0000 00xx xxxx xxxx |
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| 42 | |||
| 43 | or (1) CT_R0Hdr.4:ud URB_EntriesPerMB_2:w URBOffset:uw |
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| 44 | |||
| 45 | // 2 URB entries: |
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| 46 | // Entry 0 - CT_R0Hdr |
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| 47 | // Entry 1 - input parameter to child kernel |
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| 48 | |||
| 49 | //----- Spawn a child now ----- |
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| 50 | send (8) null:ud CT_R0Hdr null:ud TS TSMSGDSC |
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| 51 | // send (8) null:ud CT_Spawn_Reg null:ud 0x07100001 |
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| 52 | |||
| 53 | |||
| 54 | // Restore CT_R0Hdr.4:ud to r0.4:ud for next use |
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| 55 | // mov (1) CT_R0Hdr.4:ud r0.4:ud |