dp2 (sm4 - asm)

2-dimensional vector dot-product of components rg, POS-swizzle.

dp2[_sat] dest[.mask], [-]src0[_abs][.swizzle], [-]src1[_abs][.swizzle]

 

ItemDescription

dest

[in] The address of the result of the operation.

dest = src0.r * src1.r + src0.g * src1.g

src0

[in] The components in the operation.

src1

[in] The components in the operation.

 

Remarks

Scalar result replicated to components in write mask.

This instruction applies to the following shader stages:

Vertex ShaderGeometry ShaderPixel Shader
xxx

 

Minimum Shader Model

This function is supported in the following shader models.

Shader ModelSupported
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)

 

 

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