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[SYCL] Add BF16 support to GET_ROWS operation (#21391)
Add GGML_TYPE_BF16 to the SYCL backend's GET_ROWS operation, both in
supports_op and in the kernel dispatch. This fixes a performance
regression where models using BF16 embedding tensors (e.g., Gemma4's
per_layer_token_embd.weight) fall back to CPU for the GET_ROWS op,
causing a full GPU-to-CPU tensor transfer every token.
The fix reuses the existing get_rows_sycl_float template with
sycl::ext::oneapi::bfloat16, matching the pattern already used for
sycl::half (F16) and float (F32).
macOS/iOS:
- macOS Apple Silicon (arm64)
- macOS Apple Silicon (arm64, KleidiAI enabled)
- macOS Intel (x64)
- iOS XCFramework
Linux:
- Ubuntu x64 (CPU)
- Ubuntu arm64 (CPU)
- Ubuntu s390x (CPU)
- Ubuntu x64 (Vulkan)
- Ubuntu arm64 (Vulkan)
- Ubuntu x64 (ROCm 7.2)
- Ubuntu x64 (OpenVINO)
- Ubuntu x64 (SYCL FP32)
- Ubuntu x64 (SYCL FP16)
Android:
Windows:
- Windows x64 (CPU)
- Windows arm64 (CPU)
- Windows x64 (CUDA 12) - CUDA 12.4 DLLs
- Windows x64 (CUDA 13) - CUDA 13.1 DLLs
- Windows x64 (Vulkan)
- Windows x64 (SYCL)
- Windows x64 (HIP)
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