CUDA code now runs on Apple Silicon with zero source code changes
petewoodbridge · x · 2026-08-26
Someone has enabled CUDA code to run on Apple Silicon without any source code modifications.
Technical Implementation:
Built a translator chain using GPT-5.6 Sol that rewrites CUDA to Metal step-by-step through existing compilers.
Performance:
- Workload: Heavy 3D fluid simulation (particle sorting, neighbor list building, atomics), not a toy demo.
- Apple GPU: 6 seconds.
- Same code on CPU: 60 seconds.
- Overhead: Zero performance loss. Unlike typical cross-compilation that eats 30–50% throughput, this solution wastes none, with the GPU fully saturated.
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