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zeekay
d7edc9d715
CORRECTION 2 (AMM GPU rip): the constant-product xy=k AMM runs on-chain in
the EVM/consensus — GPU-accelerating it was a hallucination. Remove the GPU
AMM surface: pkg/lx/amm_gpu{,_cuda,_metal,_stub}.go + amm_nogpu.go (the
BatchEvalConstantProduct dispatcher) + amm_gpu_test.go; strip the AMM bridge
(AMMSwap, fnAMMSwap, call_amm_xyk_batch, LuxAmmReservePair) from pkg/lxgpu so
it bridges only the order-book path; drop the obsolete GPU_Batch sub-bench.
PRESERVED: pkg/lx/amm.go (ConstantProductOut/ReservePair/BatchEvalConstantProductCPU,
the 128-bit-exact CPU math) — it is the deterministic pricing used by the DEX
router's AMM source (pkg/dex/source_amm.go), untouched.
CORRECTION 1 (clob→dex): rename Go identifiers clobGPUMatch→dexGPUMatch,
clobShadowInput→dexShadowInput, runCLOBShadow→runDEXShadow,
captureCLOBShadowLocked→captureDEXShadowLocked, clobBackendLabel→dexBackendLabel,
clobScenario→dexScenario, TestCLOB*→TestDEX*, MatchDivergence.Kind "clob"→"dex".
CORRECTION 3 (host drivers): add orderbook_gpu_hip.go (cgo && linux && hip &&
!vulkan) and orderbook_gpu_vulkan.go (cgo && linux && vulkan), mirroring the
CUDA binding; narrow orderbook_gpu_cuda.go to (cgo && linux && !hip && !vulkan)
so exactly one backend compiles per linux tag combo (verified via go list).
Verified: CGO_ENABLED=0 go build ./... GREEN; go test ./pkg/lx ./pkg/dex
./pkg/dchain GREEN; gofmt clean; cgo bridge compiles; build-tag exclusivity
confirmed for ''/hip/vulkan.