[Bug 1624485] Re: Nettle: Enable AES-NI instructions on amd64.

[Vladimír Čunát]

There's also SHA* acceleration in --enable-fat and some 32-bit ARM
assembler IIRC.  In pure crypto the speedup can be quite significant
(like 5x in one of my tests).

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Title:
  Nettle: Enable AES-NI instructions on amd64.

Status in nettle package in Ubuntu:
  New

Bug description:
  The current build of libnettle6 does not have AES-NI enabled. There's
  two configure options for enabling it:

  --enable-x86-aesni: Use AES-NI instructions instead of the standard implementation. This will break on systems that don't have AES-NI.
  --enable-fat: Build a "fat" library that has the standard implementation and the AES-NI implementation. This allows the library to continue working on older systems while providing faster performance on systems that have AES-NI.

  Note that Nettle's AES-NI implementation as of v3.2 is only supported
  on amd64, not i386, so this would only affect the 64-bit package.

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