Building the `gpu` (OpenCL) backend on Windows no longer needs a vendor OpenCL
SDK. `cl-sys` links `OpenCL` (#[link(name = "OpenCL")]); instead of requiring an
SDK-provided OpenCL.lib, build.rs now generates a vendor-neutral import library
at build time from windows/OpenCL.def (all 118 cl-sys exports) — lib.exe for
MSVC (located via the cc crate), dlltool for MinGW — and puts it on the link
search path. The real OpenCL.dll is supplied at runtime by the GPU driver.
build.rs no-ops on non-Windows targets and when the gpu feature is off, and
warns rather than panics if the toolchain tool is absent so `cargo check` still
works. Combined with the runtime-loaded (dlopen) CUDA/NVML, a Windows build now
needs zero external GPU libraries.
Add BUILD-windows.md (toolchain, build, crt-static packaging, runtime deps, CI)
and link it from the README. Verified the whole crate compiles for
x86_64-pc-windows-gnu (default features and gpu,cuda); Linux is unaffected.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
AMD GPU backend:
- Add the GCN-tuned equihash192_7.cl kernel (clearCounter/blake/round1..7/
combine pipeline) and its host driver src/gpu_amd.rs. GpuSolver now dispatches
AMD-vendor OpenCL devices to it and other devices to the existing kernel
(force with ZCL_OPENCL_KERNEL=amd|legacy). Validated on an RX 9060 XT: GPU
solutions match the CPU reference 1/1.
- Expose BatchHasher::midstate() for the kernel's ulong8 hashState arg.
Runtime-loaded GPU drivers (minimum host deps):
- dlopen libcuda / libnvidia-ml via libloading instead of linking them
(src/dylib.rs macro; cuda.rs, nvml.rs, gpu_probe.rs). The binary now builds
and starts on hosts without an NVIDIA driver and reports no CUDA devices
gracefully; remove build.rs (its only job was linking those libs).
- Add Dockerfile.portable + build-portable.sh: build against Debian bullseye's
glibc 2.31 for a binary that runs on older distros and drives both AMD
(OpenCL) and NVIDIA (CUDA) cards. Document the build matrix in the README.
Mixed backend (default):
- Add --backend mixed (now the default): each card on its native backend
(NVIDIA->CUDA, AMD/Intel->OpenCL), deduped so no card is mined twice.
--devices indexes the unified list shown by --list-devices.
Misc:
- Stale-work timeout (--job-timeout) default 300s -> 600s (10 minutes).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Drop the non-Equihash algorithms and their integration points:
- delete src/ethash.rs + src/ethash/ and src/pearl.rs + src/pearl/
- remove the ethash/pearl/pearl-cuda features and pearl-only deps
(blake3, primitive-types, rand, bincode, base64) from Cargo.toml
- drop the --algo flag and the pearl/ethash dispatch branches in main.rs
- remove the pearl-cuda NVRTC linking from build.rs
- drop the stale /pearl-dump/ .gitignore entry
Builds check cleanly with default features and --no-default-features.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
GPU-accelerated Equihash 192,7 miner in Rust with three solver backends:
- CPU: Wagner's algorithm, AVX2 packed slots (xenoncat-style)
- OpenCL: full on-GPU solve (kernels/equihash.cl); runs on NVIDIA and AMD
- CUDA: driver-API replay of miniZ's extracted fatbin (src/miniz/)
Also includes a default-off pearlhash backend (src/pearl/, native CPU core +
NVRTC int8-GEMM GPU kernels) and a WIP Ethash CUDA backend (src/ethash/).
Reverse-engineering scratch (alpha-miner, pearl-dump/) and the active runtime
config (mine.toml) are gitignored; mine.example.toml is the template.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jackpotincorporated