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To: Tenchusatsu who wrote (104449)	6/14/2000 4:19:00 PM
From: EricRR	Respond to of 186894

My points were twofold: 1)Chip makers should maintain backward compatibility the the greatest extent possible. (Willimette has broken this by requiring SSE for reasonable FP performance, scrapping the old FP prefetch, and by making a bitshift very slow) 2)Chip makers should not create chips that make software design harder. Imagine the consternation when EPIC software partners discover that their hard work compiling on the Merced <demo> platform must be repeated on Mckinley because the trace lengths have changed. Unlike current chips, EPIC's design does not kindly forgive running old binaries on new chip revisions. Sledgehammer tries to make the transition to 64 bits as painless as possible. No one is going to say that they shouldn't move to Sledgehammer because their current binaries will run slower. Also on Mckinley- If it is so great, why is HP still developing a new RISC chip? Such expensive risk management must have a foundation.

To: Tenchusatsu who wrote (104449)	6/17/2000 1:53:00 AM
From: pgerassi	Read Replies (1) \| Respond to of 186894

Dear Tench: Williamette will be slower clock for clock in high precision fp than Athlon. With one very broken pipeline against three high performance pipelines, it is acknowledged that Athlon has more fpu power but, possibly, ISSE2 may be able to even score. The Mustang fpu register flat file will improve the fp capabilities to RISC like levels leaving Willie in the dust. Sledgehammer, its 64 bit extensions, and dual core will probably exceed HP's PA-RISC at the time and since HP says even McKinley will not touch it's RISC, McKinley is toast. There is not even a ghost of a chance that Willie could beat Sledgehammer in fp and even integer may be out of reach. Intel's demos of high speed seem not to be able to be realized even after 18 months. It still has not gotten Merced out, Willie seems to be slow, and McKinley is nothing but rumors. There already is some K75s that have reached 1.1GHz (see Moldyn, QMC scores) and 1.4GHz (133 x 10.5) Tbirds are demoed awaiting, per rumour, only for 133MHz motherboards which, Ali says could arrive August or September this year. Pete