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Update Embedded/MCU backend options in README #16164

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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -190,7 +190,7 @@ See [examples/models/llama](examples/models/llama/README.md) for complete workfl
| iOS | XNNPACK, MPS, CoreML (Neural Engine) |
| Linux / Windows | XNNPACK, OpenVINO, CUDA *(experimental)* |
| macOS | XNNPACK, MPS, Metal *(experimental)* |
| Embedded / MCU | XNNPACK, ARM Ethos-U, NXP, Cadence DSP |
| Embedded / MCU | ARM Ethos-U, CMSIS, NXP Neutron, Cadence DSP |
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Copilot AI Dec 9, 2025

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The backend name "CMSIS" may be ambiguous. Throughout the codebase, this backend is consistently referred to as "Cortex-M" (e.g., backends/cortex_m/, EXECUTORCH_BUILD_CORTEX_M, "ARM Cortex-M backend" in documentation). CMSIS-NN is the underlying library used by the Cortex-M backend, not the backend itself. Consider using "Cortex-M" or "ARM Cortex-M" for consistency with the rest of the codebase.

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| Embedded / MCU | ARM Ethos-U, CMSIS, NXP Neutron, Cadence DSP |
| Embedded / MCU | ARM Ethos-U, Cortex-M, NXP Neutron, Cadence DSP |

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See [Backend Documentation](https://docs.pytorch.org/executorch/main/backends-overview.html) for detailed hardware requirements and optimization guides.

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