First take on using AES-NI instructions

This first naive use of the new Intel AES-NI instructions boosts the
performance of AES on CPUs supporting this by 3 to 5 times.

Results from running
  ./benchmark --cipher-repetitions 10 --large-buffers  cipher aes
on a
  cpu family      : 6
  model           : 37
  model name      : Intel(R) Core(TM) i5 CPU         660  @ 3.33GHz
  stepping        : 2
  cpu MHz         : 3325.494
  cache size      : 4096 KB
  cpu cores       : 2

yields this:

    ECB/Stream         CBC             CFB             OFB             CTR
--------------- --------------- --------------- --------------- ---------------
  130ms   110ms   110ms   100ms   110ms   110ms   160ms   150ms   170ms   170ms
   40ms    40ms    20ms    30ms    30ms    20ms    70ms    70ms    80ms    80ms

The first line is with runtime switched off AES-NI instructions (don't
set use_aesni in do_setkey), the second with enabled AES-NI.  By
fixing the alignment, I hope to squeeze out a little more even with
this naive implementation.

1 files changed, 5 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 03461e46..f192d20a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-02-11  Werner Koch  <wk@g10code.com>
+
+	* configure.ac: Add option --disbale-aesni-support.
+	(ENABLE_AESNI_SUPPORT): New macro.
+
 2011-02-04  Werner Koch  <wk@g10code.com>
 
 	* autogen.sh: Install the git pre-commit if not yet done.