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The component selector enables swizzling. For example, component selector 0x1B is equivalent to .xyzw, while 0x55 is equivalent to .yyyy.
The component selector enables swizzling. For example, component selector 0x1B is equivalent to .xyzw, while 0x55 is equivalent to .yyyy.
== Relative addressing ==
There are 3 global index registers : idx1, idx2 and idx3 = lcnt (loop counter). For format 1 instructions, when IDX != 0, the value of the corresponding index is added to SRC1's value.
For example, if IDX = 2, idx2 = 3 and SRC1 = c8, then instead SRC1+idx3 = c11 will be used for the instruction.
idx1 and idx2 can be set manually through the SETINDEX instruction. lcnt is set automatically by the LOOP instruction. Note that lcnt is still accessible and valid after exiting a LOOP block.
== Registers ==
== Registers ==