These have been fully implemented for some time.

Bug: b/124058197
Change-Id: I8146c0902aa0c4caa974e5af5b1a36104846934c
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/27268Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Tested-by: Chris Forbes <chrisforbes@google.com>
Presubmit-Ready: Chris Forbes <chrisforbes@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>