dcl_input vThread (sm5 - asm)

  • Article

Declare compute shader input IDs.

dcl_input vThread
Item Description
vThread
 [in] The 3-component unsigned 32-bit integer ID value. One of:
  • vThreadID.xyz
  • vThreadGroupID.xyz
  • vThreadIDInGroup.xyz
  • vThreadIDInGroupFlattened

dcl_input is an existing declaration in other shader stages. It is used in the compute shader to declare the various 3-component unsigned 32-bit integer ID values unique to the compute shader. They are:

  • vThreadID.xyz
  • vGroupID.xyz
  • vThreadIDInGroup.xyz
  • vThreadIDInGroupFlattened (single component)

This instruction applies to the following shader stages:

Vertex Hull Domain Geometry Pixel Compute
X

Minimum Shader Model

This instruction is supported in the following shader models:

Shader Model Supported
Shader Model 5 yes
Shader Model 4.1 no
Shader Model 4 no
Shader Model 3 (DirectX HLSL) no
Shader Model 2 (DirectX HLSL) no
Shader Model 1 (DirectX HLSL) no

Shader Model 5 Assembly (DirectX HLSL)