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
-
sTypeis a VkStructureType value identifying this structure. -
pNextisNULLor a pointer to a structure extending this structure.
Description
-
subgroupSizeis the default number of invocations in each subgroup.subgroupSizeis at least 1 if any of the physical device’s queues support VK_QUEUE_GRAPHICS_BIT or VK_QUEUE_COMPUTE_BIT.subgroupSizeis a power-of-two. -
supportedStagesis a bitfield of VkShaderStageFlagBits describing the shader stages that group operations with subgroup scope are supported in.supportedStageswill have the VK_SHADER_STAGE_COMPUTE_BIT bit set if any of the physical device’s queues support VK_QUEUE_COMPUTE_BIT. -
supportedOperationsis a bitmask of VkSubgroupFeatureFlagBits specifying the sets of group operations with subgroup scope supported on this device.supportedOperationswill have the VK_SUBGROUP_FEATURE_BASIC_BIT bit set if any of the physical device’s queues support VK_QUEUE_GRAPHICS_BIT or VK_QUEUE_COMPUTE_BIT. -
quadOperationsInAllStagesis 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 the
VkPhysicalDeviceProperties2 structure passed to
vkGetPhysicalDeviceProperties2, it is filled in with each
corresponding implementation-dependent property.
If supportedOperations includes VK_SUBGROUP_FEATURE_QUAD_BIT,
subgroupSize must be greater than or equal to 4.
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.