- OpAtomicIAdd
- OpAtomicSMin
- OpAtomicSMax
- OpAtomicUMin
- OpAtomicUMax
- OpAtomicAnd
- OpAtomicOr
- OpAtomicXor
- OpAtomicExchange

Includes required plumbing down through Reactor. Subzero support is just
stubbed for now.

Bug: b/130768731
Bug: b/127472316
Test: dEQP-VK.image.*
Change-Id: Iecf9e9ed602c4fde674f54491658048c96fd02c6
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/29453Tested-by: Chris Forbes <chrisforbes@google.com>
Presubmit-Ready: Chris Forbes <chrisforbes@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>