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dcl_input vPrim (sm4 - asm)

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Declares that a geometry shader uses its scalar input-register vPrim.

dcl_input vPrim
Item Description
vPrim
 [in] A 32-bit scalar, which can be applied to each interior primitive in a geometry shader.

The scalar cannot be applied to any adjacent primitives.

This instruction applies to the following shader stages:

Vertex Shader Geometry Shader Pixel Shader
x

This instruction is included to aid in debugging a shader in assembly; you cannot author a shader in assembly language using Shader Model 4.

Minimum Shader Model

This function is supported in the following shader models.

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

Shader Model 4 Assembly (DirectX HLSL)