callnz pred (Vertex Shader)

Call if not zero, with a predicate. Performs a conditional call to the instruction marked by the label index. Predication uses a boolean value to determine whether of not to perform the instruction.

Syntax

where:

• label specifies a label number.
• [!] is an optional boolean NOT.
• p0 is the predicate register. See Predicate.
• replicateSwizzle specifies the component that contains the predicate value. Valid components are: x, y, z, w or r, g, b, a. The predicate value can be modified with the negate modifier.

Remarks

Vertex shader versions	1_1	2_0	2_x	2_sw	3_0	3_sw
callnz			x	x	x	x

This instruction does the following:

if (specified register component is not zero)
{
    Push address of the next instruction to the return address stack.
    Continue execution from the instruction marked by the label.
}

This instruction consumes one vertex shader instruction slot.