callnz pred - vs

  • Article

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

callnz l#, [!]p0.{x|y|z|w}

 

where:

  • l# is a label - vs marking the beginning of the subroutine to be called.
  • [!] is an optional negate modifier.
  • p0 is the Predicate Register.
  • {x|y|z|w} is the required replicate swizzle on p0.

Remarks

Vertex shader versions 1_1 2_0 2_x 2_sw 3_0 3_sw
callnz pred 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.

Vertex Shader Instructions