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Rev: nettle/ChangeLog:1.130
7a2dc599 · Niels Möller · 49da2d43 · 7a2dc599
Commit 7a2dc599 authored Feb 06, 2011 by Niels Möller
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+2011-02-06  Niels Mller  <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 Mller  <nisse@lysator.liu.se>

 	* examples/nettle-benchmark.c (time_gmac): New function.