Linked by Thom Holwerda on Tue 24th Jan 2006 16:58 UTC
Hardware, Embedded Systems Yesterday, we reported on an article about the demise of the Alpha. That article was the first part in a series about the future of processor design. Today, part II has been published: "In terms of the architecture itself, AMD's Athlon 64 platform, at the stage it is at right now, does not offer that much of a performance advantage, and AMD should not be resting on its laurels. This is because on the desktop, interconnects as such play less of a role. It's on servers and multi-processing systems that you can take advantage of scaling, and that's where interconnects such as HyperTransport have a role. But when you talk about a single-chip desktop system, whether it's one, two or four cores, the efficiency of the chipset still plays a very important role."
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RE[4]: Arrogant Article
by nimble on Wed 25th Jan 2006 15:37 UTC in reply to "RE[3]: Arrogant Article"
nimble
Member since:
2005-07-06

Does SSE3 has a multiply-accumulate operation?

No, because x86 does not allow for three-operand instructions. There is a multiply-add instruction for two 16-bit integer vectors, but that's not the same.

Therefore multiply-accumulate requires separate multiply and add instructions. Whether that actually has a performance impact depends on what execution units there are and how the operations are scheduled. Anyone got experience with that?

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