AArch64: NEON omatcopy CT/RT kernels (s/d)#5843
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artem-dmitriev wants to merge 1 commit into
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AArch64 has no vectorized transpose copy - all variants hit the scalar generic. Adds NEON ct/rt kernels for s/d (register transpose + stnp)
Passes the utest extension suite (1460/1460)
Bench on Neoverse-N1 (domatcopy, 1thread): the scalar path degrades with matrix size while the NEON kernel stays flat, giving roughly 1.2x at 2k up to ~4.5x at 18k. Single precision gap is larger.