frc (sm4 - asm)

Component-wise, extract fractional component.

frc[_sat] dest[.mask], [-] src0[_abs][.swizzle]
Item Description
[in] The address of the result of the operation.
dest = src0 - round_ni(src0)
[in] The component in the operation.


The following table shows the results obtained when executing the instruction with various classes of numbers.

src -inf -F -denorm -0 +0 +denorm +F +inf NaN
dest NaN [+0 to 1) +0 +0 +0 +0 [+0 to 1) NaN NaN

F means finite-real number.

This instruction applies to the following shader stages:

Vertex Shader Geometry Shader Pixel Shader
x x x

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)