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This article provides a detailed analysis about
the new Advanced Encryption Standard (AES) built-in functions provided by IBM XL compilers. It explores the code that
the compilers generate to demonstrate the performance gained by using the built-in
functions. This is critical for high-performance AES applications, especially when many
of them cannot be parallelized due to the nature of operation modes, such as chaining
mode [for example, cipher block chaining (CBC) and propagating cipher block chaining
(PCBC)] or feedback mode [cipher feedback (CFB) and output feedback (OFB)]. If you are
a software engineer who is interested in achieving high performance for applications on
IBM POWER8 processors, this article is for you.
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