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rc4-x86_64.pl: commentary update.

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Andy Polyakov 2011-06-27 09:46:16 +00:00
parent 0a9a692e4e
commit 0772f3b4f6
1 changed files with 6 additions and 3 deletions
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crypto/rc4/asm/rc4-x86_64.pl
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@ -86,14 +86,17 @@
# is better) and improvement coefficients relative to previous
# version of this module are:
#
# Opteron 5.3/+0%
# Opteron 5.3/+0%(*)
# P4 6.5
# Core2 6.2/+15%(*)
# Core2 6.2/+15%(**)
# Westmere 4.2/+60%
# Sandy Bridge 4.2/+120%
# Atom 9.3/+80%
#
# (*) Note that Core2 result is ~15% lower than corresponding result
# (*) But corresponding loop has less instructions, which should have
# positive effect on upcoming Bulldozer, which has one less ALU.
# For reference, Intel code runs at 6.8 cpb rate on Opteron.
# (**) Note that Core2 result is ~15% lower than corresponding result
# for 32-bit code, meaning that it's possible to improve it,
# but more than likely at the cost of the others (see rc4-586.pl
# to get the idea)...