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* Update release number to 98.
Public Issues:
* Fix missing markup in flink:vkDestroyPipelineLayout valid usage
statement (pull request 882).
* Add missing contributors for `<<VK_EXT_buffer_device_address>>` (public
pull request 891).
Internal Issues:
* Detect nested bullet points in valid usage blocks and warn about them
during VUID assignment (internal issue 1382).
* Update the style guide to document the process for reserving new bits in
bitmask types (internal issue 1411).
* Clarify for slink:VkApplicationInfo::pname:apiVersion and in the
<<fundamentals-validusage-versions, Valid Usage for Newer Core
Versions>> section when it is valid for an application to use a certain
version of Vulkan API functionality (for an instance and for a
device/physical device); and when the validation layers must generate an
error (internal issue 1412).
* Add optional <<memory-model-availability-visibility, transitive
availability/visibility operations to the memory model, including a new
pname:vulkanMemoryModelAvailabilityVisibilityChains feature for
slink:VkPhysicalDeviceVulkanMemoryModelFeaturesKHR (internal issue
1460).
* Add the code:StorageBuffer storage class to those in the
<<interfaces-resources-descset, Descriptor Set Interface>> (internal
issue 1480).
* Add missing `returnedonly` tags for a number of returned extension
structures that can be passed in pname:pNext chains (internal issue
1515).
* Clean up and rearrange some spec language for
slink:VkRenderPassCreateInfo and slink:VkAttachmentReference.txt
(internal issue 1522).
* Correctly round the code:OpVectorTimesScalar and
code:OpMatrixTimesScalar SPIR-V operations in the <<Precision of core
SPIR-V Instructions>> table (internal merge request 2996).
* Work around cases in flink:vkCmdBeginTransformFeedbackEXT,
flink:vkCmdEndTransformFeedbackEXT, and
slink:VkPipelineCoverageModulationStateCreateInfoNV where an array
parameter is `optional` but the length is not in `vk.xml`. This is an
interim fix using `noautovalidity` + handcoded VU replacing those that
should be autogenerated (internal issue 2944 and
https://github.com/KhronosGroup/Vulkan-ValidationLayers/issues/480).
* Remove redundant capability validation of the code:float16 and code:int8
SPIR-V capabilities from the <<spirvenv-capabilities, Capabilities>>
section, since they are already covered in the preceding table.
* Update check_spec_links script, including validation for reference page
open blocks. Fix errors identified by the script.
109 lines
3.7 KiB
Plaintext
109 lines
3.7 KiB
Plaintext
include::meta/VK_EXT_shader_subgroup_ballot.txt[]
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*Last Modified Date*::
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2016-11-28
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*IP Status*::
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No known IP claims.
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*Interactions and External Dependencies*::
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- This extension requires the
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https://www.khronos.org/registry/spir-v/extensions/KHR/SPV_KHR_shader_ballot.html[`SPV_KHR_shader_ballot`]
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SPIR-V extension.
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- This extension requires the
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https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_shader_ballot.txt[`GL_ARB_shader_ballot`]
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extension for GLSL source languages.
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*Contributors*::
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- Jeff Bolz, NVIDIA
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- Neil Henning, Codeplay
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- Daniel Koch, NVIDIA Corporation
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This extension adds support for the following SPIR-V extension in Vulkan:
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* `SPV_KHR_shader_ballot`
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This extension provides the ability for a group of invocations, which
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execute in parallel, to do limited forms of cross-invocation communication
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via a group broadcast of a invocation value, or broadcast of a bitarray
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representing a predicate value from each invocation in the group.
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This extension provides access to a number of additional built-in shader
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variables in Vulkan:
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* code:SubgroupEqMaskKHR, which contains the subgroup mask of the current
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subgroup invocation,
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* code:SubgroupGeMaskKHR, which contains the subgroup mask of the
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invocations greater than or equal to the current invocation,
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* code:SubgroupGtMaskKHR, which contains the subgroup mask of the
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invocations greater than the current invocation,
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* code:SubgroupLeMaskKHR, which contains the subgroup mask of the
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invocations less than or equal to the current invocation,
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* code:SubgroupLtMaskKHR, which contains the subgroup mask of the
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invocations less than the current invocation,
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* code:SubgroupLocalInvocationId, which contains the index of an
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invocation within a subgroup, and
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* code:SubgroupSize, which contains the maximum number of invocations in a
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subgroup.
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Additionally, this extension provides access to the new SPIR-V instructions:
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* code:OpSubgroupBallotKHR,
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* code:OpSubgroupFirstInvocationKHR, and
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* code:OpSubgroupReadInvocationKHR,
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When using GLSL source-based shader languages, the following variables and
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shader functions from GL_ARB_shader_ballot can map to these SPIR-V built-in
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decorations and instructions:
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* `in uint64_t gl_SubGroupEqMaskARB;` -> code:SubgroupEqMaskKHR,
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* `in uint64_t gl_SubGroupGeMaskARB;` -> code:SubgroupGeMaskKHR,
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* `in uint64_t gl_SubGroupGtMaskARB;` -> code:SubgroupGtMaskKHR,
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* `in uint64_t gl_SubGroupLeMaskARB;` -> code:SubgroupLeMaskKHR,
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* `in uint64_t gl_SubGroupLtMaskARB;` -> code:SubgroupLtMaskKHR,
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* `in uint gl_SubGroupInvocationARB;` -> code:SubgroupLocalInvocationId,
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* `uniform uint gl_SubGroupSizeARB;` -> code:SubgroupSize,
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* code:ballotARB() -> code:OpSubgroupBallotKHR,
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* code:readFirstInvocationARB() -> code:OpSubgroupFirstInvocationKHR, and
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* code:readInvocationARB() -> code:OpSubgroupReadInvocationKHR.
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=== New Object Types
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None.
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=== New Enum Constants
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None.
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=== New Enums
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None.
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=== New Structures
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None.
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=== New Functions
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None.
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=== New Built-In Variables
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* <<interfaces-builtin-variables-sgeq,code:SubgroupEqMaskKHR>>
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* <<interfaces-builtin-variables-sgge,code:SubgroupGeMaskKHR>>
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* <<interfaces-builtin-variables-sggt,code:SubgroupGtMaskKHR>>
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* <<interfaces-builtin-variables-sgle,code:SubgroupLeMaskKHR>>
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* <<interfaces-builtin-variables-sglt,code:SubgroupLtMaskKHR>>
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* <<interfaces-builtin-variables-sgli,code:SubgroupLocalInvocationId>>
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* <<interfaces-builtin-variables-sgs,code:SubgroupSize>>
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=== New SPIR-V Capabilities
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* <<spirvenv-capabilities-table-subgroupballot,SubgroupBallotKHR>>
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=== Issues
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None.
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=== Version History
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* Revision 1, 2016-11-28 (Daniel Koch)
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- Initial draft
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