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feat/cuda: I2 - tensor layer (device alloc, host<->device copies, file streaming)
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feat/cuda: I2 - tensor layer (device alloc, host<->device copies, file streaming)
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Commits on Aug 12, 2026
feat/cuda: I1 scaffold - CUDA backend skeleton (probe+create/free real, 100 op stubs)
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feat/cuda: build CLI objects as .cuda.o with -D_GNU_SOURCE (Linux CLOCK_MONOTONIC/strdup)
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feat/cuda: fix nvcc strictness - seterr takes const h3_gpu*, stub returns cast to exact type
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feat/cuda: probe uses cudaDeviceGetAttribute(UnifiedMemory) (CUDA 13 removed prop.unifiedMemory)
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feat/cuda: unified_memory=1 (GB10 unified; CUDA13 removed unifiedMemory attr)
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feat/cuda: extern "C" guards in h3_gpu.h/h3_cuda.h + include h3_cuda.h in h3_cuda.cu
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feat/cuda: I2 tensor layer - real device alloc/copies/file streaming, command-buffer no-ops, stats
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