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Politics : Formerly About Advanced Micro Devices

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To: Steve Porter who wrote (40384)	10/29/1998 11:21:00 PM
From: Ed Sammons	Read Replies (1) of 1574268

Steve, Because Spec is a benchmark, I am assuming the a high performanance compiler can get around much of the limitations of the x86 architecture. For instance, inlining of subroutines to eliminate subroutine jumps and its register stores. Other "features" of the x86 arch are already hidden, such as dynamic register renaming to increase the number of registers. If Alpha has 2 fully indep FPU exec units vs K7 combined Mult & Accum type unit, I think 2/3 of Alhpa's performance at a slightly higher clock rate is reasonable. If the Alpha FPU is also a MAC type, the performance will be much closer. I do not know how many exec units are in the Alpha, or the degree of parallelism and pipelining vs. the K7. What are your assumptions for a 20-25 SpecFP?

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