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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Elmer who wrote (42869)	12/6/1998 8:22:00 PM
From: Cirruslvr	Respond to of 1572899

Elmer - RE: "Assuming that these quotes are really from "Bob" at AMD, they are essentially admitting that if the Katmai processor has Double Precision SIMD then all claims of K7 FPU superiority go out the window. Now I don't know if the Katmai has this capability or not, and I certainly wouldn't say so here if I did, but it does put some perspective on the comments of others who have made big claims while not really knowing what the competition will be." This is all assuming that whatever application is running, it is optimized for KNI. It will take time for applications to come out optimized for KNI, just like with 3D NOW!. Granted, that since Intel has the power, more applications will be optimized for KNI when it comes out than 3D NOW! had when it came out. But, as you have said all along, we'll wait until the benchmarks come out.

To: Elmer who wrote (42869)	12/6/1998 9:11:00 PM
From: kash johal	Read Replies (2) \| Respond to of 1572899

Elmer, I think you know very well that Katmai does not have double precision SIMD. Stop spreading that PHUD around. And please take that monopole out of your posterior and post real information. PS Hows the short squeeze. You had better cover soon. Regards, Kash

To: Elmer who wrote (42869)	12/7/1998 8:31:00 PM
From: Petz	Respond to of 1572899

Elmer, re:<<[Bob at AMD] is essentially admitting that if the Katmai procesor has Double Precision SIMD then all claims of K7 FPU superiority go out the window.>> Nice try, but actually, at amdzone.com, "Bob at AMD" gives several convincing reasons why Katmai does not have double precision SIMD. Commenting on Anand's statement that KNI will have double precision SIMD, he says, No public disclosure of KNI has ever described such a thing. For example, KNI has not been reported to implementing a 2x64 bit SIMD mode. So I believe this is incorrect. Besides, if this were true it would probably be the most important improvement since it would totally obsolete the x87 FPU in all cases. I contend that this is not true. I might add that, personally, I DO expect Intel to improve double precision performance in the Katmai. They will probably include a fully pipelined (i.e., one result per clock cycle) double precision floating point multiplier. Currently, only the DP add is fully pipelined -- the multiplier requires two clock cycles per result. Its possible that the DP-add hardware will be made independent of the multiplier -- this would allow a multiply and an add to start every clock cycle, but not two adds or two multiplies. This is essentially what the K7 is capable of. I'm quite dubious of this however, since at 0.25µ the die size would have to be over 250mm^2. Petz