C Specification
The VkPhysicalDeviceSubgroupProperties
structure is defined as:
// Provided by VK_VERSION_1_1
typedef struct VkPhysicalDeviceSubgroupProperties {
VkStructureType sType;
void* pNext;
uint32_t subgroupSize;
VkShaderStageFlags supportedStages;
VkSubgroupFeatureFlags supportedOperations;
VkBool32 quadOperationsInAllStages;
} VkPhysicalDeviceSubgroupProperties;
Members
The members of the VkPhysicalDeviceSubgroupProperties
structure
describe the following implementationdependent limits:
Description

sType
is the type of this structure. 
pNext
isNULL
or a pointer to a structure extending this structure.

subgroupSize
is the default number of invocations in each subgroup.subgroupSize
is at least 1 if any of the physical device’s queues supportVK_QUEUE_GRAPHICS_BIT
orVK_QUEUE_COMPUTE_BIT
.subgroupSize
is a poweroftwo. 
supportedStages
is a bitfield of VkShaderStageFlagBits describing the shader stages that group operations with subgroup scope are supported in.supportedStages
will have theVK_SHADER_STAGE_COMPUTE_BIT
bit set if any of the physical device’s queues supportVK_QUEUE_COMPUTE_BIT
. 
supportedOperations
is a bitmask of VkSubgroupFeatureFlagBits specifying the sets of group operations with subgroup scope supported on this device.supportedOperations
will have theVK_SUBGROUP_FEATURE_BASIC_BIT
bit set if any of the physical device’s queues supportVK_QUEUE_GRAPHICS_BIT
orVK_QUEUE_COMPUTE_BIT
. 
quadOperationsInAllStages
is a boolean specifying whether quad group operations are available in all stages, or are restricted to fragment and compute stages.
If the VkPhysicalDeviceSubgroupProperties
structure is included in the
pNext
chain of VkPhysicalDeviceProperties2, it is filled with
the implementationdependent limits.
If supportedOperations
includes VK_SUBGROUP_FEATURE_QUAD_BIT
, subgroupSize
must be greater
than or equal to 4.
See Also
VkBool32
, VkShaderStageFlags, VkStructureType, VkSubgroupFeatureFlags
Document Notes
For more information, see the Vulkan Specification
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.
Copyright
Copyright (c) 20142020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.