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dcl_output_sgv (sm4 - asm)

  • Article

Declares an output register that contains a system-value parameter.

dcl_output_sgv oN[.mask], systemValueName
Item Description
oN
 [in] An output data register;
  • N is an integer that identifies the register number.
  • [.mask] is an optional component mask (.xyzw) that specifies which of the register components to use.
systemValueName
 [in] The system-value name which is a string (see system-value semantics) without the "SV_" prefix.

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.

Example

Here is an example.

dcl_output_sgv o4.x, primitiveID

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)