frc (Vertex Shader)

Returns the fractional portion of each input component.

Syntax

where

• dst is the destination register.
• src is a source register.

Remarks

The following code fragment shows conceptually how the instruction operates.

dest.x = src.x - (float)floor(src.x);
dest.y = src.y - (float)floor(src.y);
dest.z = src.z - (float)floor(src.z);
dest.w = src.w - (float)floor(src.w);

Each component of the result is in the range from 0.0 through 1.0.

For version 1_1, the allowable write masks are .y and .xy (.x is not allowed).

Instruction Information