![]() |
![]() |
![]() |
Start of an if block.
if bool |
---|
Where:
Pixel shader versions | 1_1 | 1_2 | 1_3 | 1_4 | 2_0 | 2_x | 2_sw | 3_0 | 3_sw |
---|---|---|---|---|---|---|---|---|---|
if bool | x | x | x | x |
If the source Boolean register in the if statement is true, the code enclosed by the if statement and the matching endif or else is executed. Otherwise, the code enclosed by the else...endif statements is executed. This instruction consumes one instruction slot.
An if block can be nested.
An if block cannot straddle a loop block.
An if block can be followed by a statement block, and/or an else instruction, and/or an endif instruction.
This instruction provides conditional static flow control.
defb b3, true if b3 // Instructions to run if b3 is nonzero else // Instructions to run otherwise endif