C Specification
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;
Members
The members of the VkPhysicalDeviceShaderCorePropertiesAMD
structure
describe the following implementationdependent limits:
Description

sType
is the type of this structure. 
pNext
isNULL
or a pointer to an extensionspecific 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 buffers). 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 VkPhysicalDeviceProperties2, it is filled
with the implementationdependent limits.
See Also
Document Notes
For more information, see the Vulkan Specification at URL
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.
Copyright
Copyright (c) 20142019 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.