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(parent: 53b4a12) | patch
Avoid undefined behaviour when calculating subgroup ballot masks
authorDae Kim <dae.kim@imgtec.com>
Fri, 13 Dec 2019 09:26:05 +0000 (09:26 +0000)
committerAlexander Galazin <Alexander.Galazin@arm.com>
Fri, 20 Dec 2019 12:47:19 +0000 (07:47 -0500)
commitd5c520f39db038e83bb4f30330c8a9e4aec5ea8f
tree4066b739cfecc972ea3156a2c89d3fd91e352994tree | snapshot
parent53b4a1282080caf719990ab54afa212aff112fbccommit | diff
Avoid undefined behaviour when calculating subgroup ballot masks

The affected tests are shifting the bits of the last component of the
computed ballot masks by 32. However, the SPIR-V specification
establishes that the result of OpShift* is undefined if `Shift` is
greater than *or equal* to the bit width of the components of `Base`.

Affects:

dEQP-VK.subgroups.ballot_other.*

Components: Vulkan

VK-GL-CTS issue: 2083

Change-Id: I8c9b4373f1429669a40741986916e8d71b7eb573
external/vulkancts/modules/vulkan/subgroups/vktSubgroupsBallotOtherTests.cpp diff | blob | history
Domain: Graphics System / GL;