VkPhysicalDeviceShaderCorePropertiesAMD

The VkPhysicalDeviceShaderCorePropertiesAMD structure is defined as:

typedef struct VkPhysicalDeviceShaderCorePropertiesAMD {
    VkStructureType sType;
    void* pNext;
    uint32_t shaderEngineCount;
    uint32_t shaderArraysPerEngineCount;
    uint32_t computeUnitsPerShaderArray;
    uint32_t simdPerComputeUnit;
    uint32_t wavefrontsPerSimd;
    uint32_t wavefrontSize;
    uint32_t sgprsPerSimd;
    uint32_t minSgprAllocation;
    uint32_t maxSgprAllocation;
    uint32_t sgprAllocationGranularity;
    uint32_t vgprsPerSimd;
    uint32_t minVgprAllocation;
    uint32_t maxVgprAllocation;
    uint32_t vgprAllocationGranularity;
} VkPhysicalDeviceShaderCorePropertiesAMD;

• sType is a VkStructureType value identifying this structure.
• pNext is NULL or a pointer to a structure extending this structure.
• shaderEngineCount is an unsigned integer value indicating the number of shader engines found inside the shader core of the physical device.
• shaderArraysPerEngineCount is an unsigned integer value indicating the number of shader arrays inside a shader engine. Each shader array has its own scan converter, set of compute units, and a render back end (color and depth attachments). Shader arrays within a shader engine share shader processor input (wave launcher) and shader export (export buffer) units. Currently, a shader engine can have one or two shader arrays.
• computeUnitsPerShaderArray is an unsigned integer value indicating the physical number of compute units within a shader array. The active number of compute units in a shader array may be lower. A compute unit houses a set of SIMDs along with a sequencer module and a local data store.
• simdPerComputeUnit is an unsigned integer value indicating the number of SIMDs inside a compute unit. Each SIMD processes a single instruction at a time.
• wavefrontSize is an unsigned integer value indicating the maximum size of a subgroup.
• sgprsPerSimd is an unsigned integer value indicating the number of physical Scalar General-Purpose Registers (SGPRs) per SIMD.
• minSgprAllocation is an unsigned integer value indicating the minimum number of SGPRs allocated for a wave.
• maxSgprAllocation is an unsigned integer value indicating the maximum number of SGPRs allocated for a wave.
• sgprAllocationGranularity is an unsigned integer value indicating the granularity of SGPR allocation for a wave.
• vgprsPerSimd is an unsigned integer value indicating the number of physical Vector General-Purpose Registers (VGPRs) per SIMD.
• minVgprAllocation is an unsigned integer value indicating the minimum number of VGPRs allocated for a wave.
• maxVgprAllocation is an unsigned integer value indicating the maximum number of VGPRs allocated for a wave.
• vgprAllocationGranularity is an unsigned integer value indicating the granularity of VGPR allocation for a wave.

If the VkPhysicalDeviceShaderCorePropertiesAMD structure is included in the pNext chain of the VkPhysicalDeviceProperties2 structure passed to vkGetPhysicalDeviceProperties2, it is filled in with each corresponding implementation-dependent property.