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Rev: nettle/ChangeLog:1.130

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+2011-02-06  Niels Möller  <nisse@lysator.liu.se>
+
+       * gcm.c (gcm_rightshift): Complete rewrite, to use word rather
+       than byte operations. Improves gmac performance from 830 cycles /
+       byte to (still poor) 268 cycles per byte on intel x86_64.
+       (gcm_gf_mul): Rewrote. Still uses the bitwise algorithm from the
+       specification, but with separate byte and bit loops. Improves gmac
+       performance a bit further, to 227 cycles/byte.
+
 2011-02-05  Niels Möller  <nisse@lysator.liu.se>
 
        * examples/nettle-benchmark.c (time_gmac): New function.