Intel Advanced Matrix extensions (AMX)

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I guess you can never take the Intel out of the boy even if the boy is long out of Intel. A few months back, I had lots of fun making sure MLIR's code generation maps to efficient AVX512 instructions. This week, I thoroughly enjoyed designing and implementing a MLIR dialect for Intel Advanced Matrix extensions (AMX) with integration tests that run correctly on a Sapphire Rapids emulator. Staring at some x86 assembly instructions, it does not get much better than that....


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