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


To: Maxwell who wrote (34820)7/19/1998 12:59:00 PM
From: Time Traveler  Respond to of 1572746
 
Maxwell,

>>"For addition and subtraction you want to use integer unit instead of FPU. Integer is much faster than FPU."<<

May I remind you that it is fruitless to do addition/subtraction operations on floating point numbers using integer unit?

>>"I [Maxwell] have seen a few published results with similar conclusion. It is the ability to make division and square root faster is what make the K6-2 outperform the PII in 3D geometry transformation."<<

You are probably right about why 3D extension is so much faster, because of faster division, but this square root function still bogs my mind. How do you achieve it in 10 cycles? Please show me a few publications you have reviewed.

>>"SIMD outperforms pipeline FPU"<<

Why is this the case? Could you elaborate, please?

Time Traveler