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To some degree, most known AArch64 micro-architectures appear to be able to issue ALU instructions in parellel to SIMD instructions without affecting the SIMD throughput. This means we can use the ALU to process a fifth ChaCha block while the SIMD is processing four blocks in parallel. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>