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anv/query: Let 32-bit values wrap

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From the Vulkan 1.0.39 Specification:

   "If VK_QUERY_RESULT_64_BIT is not set and the result overflows a
   32-bit value, the value may either wrap or saturate."

So we can either clamp or wrap.  Wrapping is both easier and what the
user gets if they use vkCmdCopyQueryPoolResults and we should be
consistent.  We could make vkCmdCopyQueryPoolResults clamp but it's
annoying and ends up burning extra batch for something the spec clearly
doesn't require.

Reviewed-By: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
This commit is contained in:
Jason Ekstrand 2017-03-15 16:43:54 -07:00
parent c2a97fb7ae
commit 9d43afa3dc
1 changed files with 0 additions and 2 deletions
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2
src/intel/vulkan/genX_query.c
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@ -181,8 +181,6 @@ VkResult genX(GetQueryPoolResults)(
dst[1] = slot[firstQuery + i].available;
} else {
uint32_t *dst = pData;
if (result > UINT32_MAX)
result = UINT32_MAX;
if (write_results)
dst[0] = result;
if (flags & VK_QUERY_RESULT_WITH_AVAILABILITY_BIT)