lt (sm4 - asm)

Component-wise vector floating point less-than comparison.

lt dest[.mask], [-]src0[_abs][.swizzle], [-]src1[_abs][.swizzle]

 

ItemDescription

dest

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

src0

[in] The value to compare to src1.

src1

[in] The value to compare to src0.

 

Remarks

This instruction performs the float comparison (src0 < src1) for each component, and writes the result to dest.

If the comparison is true, then 0xFFFFFFFF is returned for that component. Otherwise 0x0000000 is returned

Denorms are flushed before comparison; original source registers are untouched.

+0 equals -0.

Comparison with NaN returns false.

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

 

 

 

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