The lanes in a quad are typically ordered as follows:
In modern graphics pipelines, GPUs process pixels in small 2x2 clusters known as . Within each quad, lanes (threads) are typically indexed from 0 to 3 in a Z-order scanline pattern: Lane 0 (Top-Left) swaps with Lane 1 (Top-Right). Lane 2 (Bottom-Left) swaps with Lane 3 (Bottom-Right). quadreadacrossx
| Top-Left (0) | Top-Right (1) | | :---: | :---: | | | Bottom-Right (3) | The lanes in a quad are typically ordered