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Technology Stocks : Advanced Micro Devices - Moderated (AMD)

AMD 231.80

+1.7%

Jan 16 3:59 PM EST

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To: Dan3 who wrote (53338)	8/31/2001 2:04:51 AM
From: wanna_bmw	Read Replies (1) of 275872

Dan, Re: "P4 has 6 execution units and Athlon has 9." Actually, the Pentium 4 has 7 execution units, and two of them are double pumped. But besides, listing the number of execution units is a poor way to measure performance, since they are used so terribly inefficiently in x86 design. You are lucky to get three of them functioning in a clock cycle, and that goes for both Pentium 4 and Athlon. The reason they build so many is to cover all the bases. Out of your typical max ILP of 3 instructions per clock cycle, are they going to be floating point? Integer? Memory accesses? A mixture? The same idea is behind EPIC, but then you have the compiler guessing for you, which is usually more accurate than your typical reorder queue. wanna_bmw

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