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Message
From: Mikhail Matusov<misoma@r...>
Date: Wed Jul 14 19:43:25 CEST 2004
Subject: [oc] Why open processors are so much slower than commercial ones?
On Wed, 14 Jul 2004 09:51:48 -0700
"Michael Ayton" <mike_ayton@d...> wrote:
MA>
MA> Microblaze was talor made for Xinilx FPGA devices.... try targeting the
MA> Microblaze to say an Altera device (probably not all that trivial) and see
MA> if there is a difference :)
Unfortunately, I can't try your experiment since I don't believe the
MicroBlaze is available in source code.
I understand the sarcasm, but let's try to be more specific, what are
those architecture specific details used in MicroBlaze that make it run
at least 2 times faster than anything in the open domain (probably 3-5
times faster than most of the stuff )?
I could understand if let's say multiplication in a CPU not targeted to
a specific architecture was slower, since Xilinx has hardware
multipliers, but what are the other features? Any FPGA has plenty of
LUTs and FFs and I think these days we can count on having dual port
memories as well...
/Mikhail
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