Allow parallelism scaling of layernorm below N/SIMD = 12.#1534
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…newly supported cases.
STFleming
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Mar 20, 2026
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STFleming
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Looks great. I removed the assertions from the compiler catching this and added some additional test coverage for the new capabilities, all tests are passing on my end.
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The
layernormimplementation was not able to scale to a SIMD parallelism so large that it would push the N/SIMD ratio below 12 due to a corresponding II limitation in thersqrtimplementation. This PR removes this constraint with a significant overhaul of thesqrtimplementation introducing compute interleaving and DSP unrolling, which are leveraged as needed to meet the requested II requirement.