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Rev: nettle/ChangeLog:1.131

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 2011-02-06  Niels Möller  <nisse@lysator.liu.se>
 
+       * gcm.c (gcm_rightshift): Moved the reduction of the shifted out
+       bit here.
+       (gcm_gf_mul): Updated for gcm_rightshift change. Improves gmac
+       performance to 181 cycles/byte.
+
+       * gcm.c (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.
+
        * 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>