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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"> Genx instructions are not directly inserted into batch buffer.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">The batch buffer contains some reference pointer which will finally point to a GPU buffer which contains GPU instructions for a kernel.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">The instruction emit code are located in backend/src/backend/genx_encoder.cpp
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">To execute a kernel, with only opcode and memory access is not enough.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">There is an entire runtime environment need to be set up.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">To understand those, I suggest you first study hardware spec at
<a href="https://01.org/zh/linuxgraphics/documentation/hardware-specification-prms">
https://01.org/zh/linuxgraphics/documentation/hardware-specification-prms</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">Zou Nanhai<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Beignet [mailto:beignet-bounces@lists.freedesktop.org]
<b>On Behalf Of </b>Dushyant Behl<br>
<b>Sent:</b> Monday, July 06, 2015 8:49 PM<br>
<b>To:</b> beignet@lists.freedesktop.org<br>
<b>Subject:</b> [Beignet] Gen7 Instructions Opcode Examples<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Hello Guys,<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">I'm extremely sorry if I mailed to the wrong mailing list. Please forgive me if I've done anything wrong, this is my first message to this mailing list.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">I'm a masters student of computer science, I'm trying to understand the beignet project and how the batch buffers are submitted to the i915 gpu driver.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">I have a problem getting hold of the arithmetic instruction formats of the Intel Gen7 Haswell processors.<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US">Can anyone please help me by pointing me to the location where beignet compiler backend emits compiled instuctions (byte code) in the batchbuffer. <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Also I wanted to ask if is possible to test the execution of one single instruction like ADD/SUB in the batch buffer by writing the opcodes along with some src and dest memory locations directly in batchbuffer rather
than going through the beignet compiler.<br>
Can anyone please provide me an example of any such instruction?<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Thanks in advance,<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Dushyant<o:p></o:p></span></p>
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