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 implementation-dependent limits:
Description
-
sTypeis the type of this structure. -
pNextisNULLor a pointer to an extension-specific structure. -
shaderEngineCountis an unsigned integer value indicating the number of shader engines found inside the shader core of the physical device. -
shaderArraysPerEngineCountis 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. -
computeUnitsPerShaderArrayis 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. -
simdPerComputeUnitis an unsigned integer value indicating the number of SIMDs inside a compute unit. Each SIMD processes a single instruction at a time. -
wavefrontSizeis an unsigned integer value indicating the maximum size of a subgroup. -
sgprsPerSimdis an unsigned integer value indicating the number of physical Scalar General Purpose Registers (SGPRs) per SIMD. -
minSgprAllocationis an unsigned integer value indicating the minimum number of SGPRs allocated for a wave. -
maxSgprAllocationis an unsigned integer value indicating the maximum number of SGPRs allocated for a wave. -
sgprAllocationGranularityis an unsigned integer value indicating the granularity of SGPR allocation for a wave. -
vgprsPerSimdis an unsigned integer value indicating the number of physical Vector General Purpose Registers (VGPRs) per SIMD. -
minVgprAllocationis an unsigned integer value indicating the minimum number of VGPRs allocated for a wave. -
maxVgprAllocationis an unsigned integer value indicating the maximum number of VGPRs allocated for a wave. -
vgprAllocationGranularityis 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 implementation-dependent limits.
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) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.