Will be fleshed out in another set of changes.

Bug: b/130343040
Change-Id: I3df91cbeb60aba555020e21ffdf6feaa12865389
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/29031
Presubmit-Ready: Ben Clayton <bclayton@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>