Instruction Modifiers (Vertex Shader)

Instruction modifiers affect the result of the instruction before it is written into the destination register.

Sat

Saturates or clamps the instruction result to [0,1] range before writing to the destination register.

add_sat rDest, rSrc0, rSrc1

Where:

rDest = clamp_between_0_and_1(rSrc0 + rSrc1).

The saturate instruction modifier costs no additional instruction slots.

The _sat instruction modifier can be used with any arithmetic instruction (including macro-ops), except the frc and sincos instructions.

_sat cannot be used with texture addressing instructions texld* and texkill.

_sat cannot be used with instructions writing to output o# registers.