dcl-output-sgv.md

title	description	ms.assetid	ms.topic	ms.date	topic_type	api_name	api_type	api_location
dcl_output_sgv (sm4 - asm)	dcl\_output\_sgv (sm4 - asm)	0723541e-a97d-4b31-aaba-e7d1172137a6	reference	05/31/2018	apiref

dcl_output_sgv (sm4 - asm)

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

Related topics

Shader Model 4 Assembly (DirectX HLSL)