callnz bool - vs

Call if not zero. Performs a conditional call to the instruction marked by the label index.

Syntax

callnz l#, [!]b#

where:

where l# is a label - vs marking the beginning of the subroutine to be called.
[!] is the optional boolean NOT modifier.
b# identifies a Constant Boolean Register.

Remarks

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

This instruction does the following:

if (specified boolean register 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.