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To: Scumbria who wrote (107903)8/21/2000 4:05:35 PM
From: Tenchusatsu  Read Replies (3) | Respond to of 186894
 
Scumbria, <When and how does it remove bubbles from the pipeline?>

I already answered that. The double-speed ALU has no impact on pipeline bubbles. Its use is to speed up the sections in-between the pipeline bubbles where the real work needs to be done.

<There is also the unanswered issue of how it impacts clock speed. Until proven otherwise, I'm inclined to think that the double speed ALU may have been a very bad idea.>

Let's see. Pentium 4 can already reach speeds of 1.4 GHz and above on a 0.18u process. I doubt the CPU can run any faster had Intel decided on a single-speed ALU.

But hey, maybe questions like this will be answered during this year's Microprocessor Forum. Are you going again?

Tenchusatsu



To: Scumbria who wrote (107903)8/22/2000 12:44:07 AM
From: Paul Engel  Read Replies (3) | Respond to of 186894
 
SCUMbria - Re: "Until proven otherwise, I'm inclined to think that the double speed ALU may have been a very bad idea."

I'm sure you have a thousand good reasons why a half-speed ALU would have been a better idea.

Paul