rep (Pixel Shader)

Start a rep...endrep block.

Syntax

where integerReg is an integer register that specifies the repeat count in the x component. See Constant Integer Register.

Remarks

• rep uses integer registers (i#).
• endrep must follow the last instruction of a repeat block.
• The endrep offset must be greater than the rep instruction offset.
• Repeat loops cannot be nested for ps_2_sw or ps_2_x.
• Repeat loops can be nested between 0 and 4 levels for ps_3_0 and ps_3_sw.
• Repeat loops are allowed to be either completely inside an if block or completely surrounding it; no straddling is allowed.
• rep consumes one vertex shader instruction slot but must be used with endrep, which consumes another.
• The maximum loop iteration count is 255.

Here is how the instruction works.

StartLoopOffset = next instruction offset
    LoopIterationCount   = IntegerRegister.x
    if (LoopIterationCount <= 0)
        Continue execution after the next EndRep instruction