Q: Why do all Pascal programmers ask to live in Atlantis?
A: Because it is below C level.

Low-Level Thinking in High-Level Shading Languages
Wednesday, April 3, 2013 | Permalink

Persson_LowLevelThinking.pptx (1.0 MB)
Persson_LowLevelThinking.pdf (6.8 MB)
This is the slide deck from my GDC 2013 presentation titled "Low-Level Thinking in High-Level Shading Languages". This talk highlights how low-level thinking can help you write faster shader and shows examples of how high-level constructs map to GPU hardware instructions.