diff --git a/ChangeLog b/ChangeLog index 30911172578332727f42b5a91804ef9c2c6e2111..de8fe88edb504f7456d066f458210eb705535bdd 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,11 +1,17 @@ 2011-02-06 Niels M�ller <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 M�ller <nisse@lysator.liu.se>