<div class="gmail_quote">On Tue, Dec 13, 2011 at 12:54 PM, Villmow, Micah <span dir="ltr"><<a href="mailto:Micah.Villmow@amd.com">Micah.Villmow@amd.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Justin Holewinski [mailto:<a href="mailto:justin.holewinski@gmail.com" target="_blank">justin.holewinski@gmail.com</a>]
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<b>Sent:</b> Tuesday, December 13, 2011 9:48 AM<br>
<b>To:</b> Villmow, Micah<br>
<b>Cc:</b> LLVM Developers Mailing List<br>
<b>Subject:</b> Re: [LLVMdev] Changes to the PTX calling conventions<u></u><u></u></span></p>
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<p class="MsoNormal">On Tue, Dec 13, 2011 at 11:25 AM, Villmow, Micah <<a href="mailto:Micah.Villmow@amd.com" target="_blank">Micah.Villmow@amd.com</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">Currently, PTX has its own calling conventions where they are split into kernel/device.
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<p class="MsoNormal">The AMDIL backend requires very similar calling conventions and I was wondering if
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<p class="MsoNormal">we could change the calling conventions from PTX_* to something more generic?<u></u><u></u></p>
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<p class="MsoNormal">Maybe just Kernel/Device? Or would it be preferable to add a new calling convention<u></u><u></u></p>
<p class="MsoNormal">that is unique for each target, even though it duplicates functionality?<u></u><u></u></p>
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<p class="MsoNormal">I don't see any reason why a generic calling convention would not work. We could do something like cl_device/cl_kernel. I hate to introduce OpenCL terms into a back-end where OpenCL is just one consumer, but it does map cleanly to the
architecture model. Or perhaps something more generic like gpu_device/gpu_global.<u></u><u></u></p>
</div><p class="MsoNormal"><b><i><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">[Villmow, Micah] Yeah, but this should apply to more than just gpu's. For example, AMD's OpenCL CPU implementation could utilize the calling conventions, along with
projects like ocelot that have the device-only vs host/device differentiation. Maybe just device/host is good enough?</span></i></b></p></div></div></div></div></div></blockquote><div><br></div><div>Device/host just seems vague. Maybe we could create a set of specific conventions, one set for OpenCL: cl_device/cl_kernel, and another set for general accelerators, e.g. accel_device/accel_global.</div>
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<p class="MsoNormal">Thanks,<u></u><u></u></p>
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<p class="MsoNormal">Justin Holewinski<u></u><u></u></p>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><br><div>Thanks,</div><div><br></div><div>Justin Holewinski</div><br>