Dag Arne Osvik wrote:
Herbert Xu wrote:
On Wed, Mar 15, 2006 at 08:57:48AM +0100, Dag Arne Osvik wrote:
I've attached an implementation of AES optimized for 64-bit Pentium
4E. The round function achieves 3 ?ops per cycle, so even with
function call overhead its performance is quite good, with best
average time for 10000 consecutive encryptions at <233 cycles per
block. I'll make it ready for inclusion in the Linux kernel later.
In the meantime, comments are welcome.
Cool. How does this compare with the existing x86-64 AES implementation?
Using the best average encryption time per block from tcrypt's speed
tests gave these numbers:
ECB on Intel 288.5
ECB on AMD 286.1
CBC on Intel 510.4
CBC on AMD 334.2
Sorry. Those AMD numbers are for the C version, not asm.
Btw, those 510 cycles for CBC are rather surprising. Maybe ECB is using
the assembler version, while CBC uses C?
Dag Arne
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