This is a first, rough, implementation of the OpenCL.Debug.100 extension instruction set. This is incomplete, and likely buggy. It does however implement enough to perform single line stepping through hand-crafted HLSL, with basic variable inspection. Many tests and fixes to come... Bug: b/145351270 Change-Id: Ia570f5b22a8b3ce39df0438ca3c6700d1a00d014 Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/40268Reviewed-by: Antonio Maiorano <amaiorano@google.com> Kokoro-Presubmit: kokoro <noreply+kokoro@google.com> Tested-by: Ben Clayton <bclayton@google.com>