packed_simd
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LLVM cttz.v8i8 intrinsic broken on AArch64
[ui]8x8::trailing_zeros will need a workaround until fixed.
Reported to LLVM: https://bugs.llvm.org/show_bug.cgi?id=39729
Fixed upstream, https://github.com/llvm/llvm-project/commit/a3be17ea1cf0414ffd9744491ba22a6dd6157369 in monorepo.
Just for my curiosity, why this and https://github.com/rust-lang/packed_simd/issues/193 are not closed?
Nobody has verified that the fix actually fixed the issue yet.