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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - SPIR-V OpSwitch with int64 not supported even though shaderInt64 is true"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101560">101560</a>
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<th>Summary</th>
<td>SPIR-V OpSwitch with int64 not supported even though shaderInt64 is true
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<th>Product</th>
<td>Mesa
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>Other
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/Vulkan/intel
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<th>Assignee</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>programmerjake@gmail.com
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<th>CC</th>
<td>jason@jlekstrand.net
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=132150" name="attach_132150" title="SPIR-V vertex shader that uses OpSwitch on a uint64_t (may be incorrect)">attachment 132150</a> <a href="attachment.cgi?id=132150&action=edit" title="SPIR-V vertex shader that uses OpSwitch on a uint64_t (may be incorrect)">[details]</a></span>
SPIR-V vertex shader that uses OpSwitch on a uint64_t (may be incorrect)
I noticed that even though shaderInt64 is true on gen 8 and above, the SPIR-V
to NIR translator code doesn't support OpSwitch on 64-bit integers.
Supporting 64-bit integers in OpSwitch requires parsing 2 for each switch
value, with the target block id, it requires 3 words for each switch case.
The latest commit on master when I checked is
e558a7a9888ee56863f11e7ede387689626f6ea9.
see OpSwitch translation code:
<a href="https://github.com/mesa3d/mesa/blob/master/src/compiler/spirv/vtn_cfg.c#L400">https://github.com/mesa3d/mesa/blob/master/src/compiler/spirv/vtn_cfg.c#L400</a>
code that enables shaderInt64:
<a href="https://github.com/mesa3d/mesa/blob/master/src/intel/vulkan/anv_device.c#L720">https://github.com/mesa3d/mesa/blob/master/src/intel/vulkan/anv_device.c#L720</a>
Note: from what I can tell, glslang doesn't currently allow creating OpSwitch
on a int64, so programs that use OpSwitch this way are probably non-existant.</pre>
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