Formerly About Advanced Micro Devices Message Board

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Politics : Formerly About Advanced Micro Devices

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To: Scumbria who wrote (36449)	8/28/1998 11:02:00 PM
From: Maxwell	Read Replies (2) of 1583684

Scrumbia: <<I have to wonder at the usefulness of double-precision SIMD in 3-D apps and games. It depends on the quality of the image you are trying to render. High resolution images need double precision math. Doom doesn't.>> You are full of it. Even with single-precision SIMD you can do high resolution. Most users would be very happy to use 1024X780. Beyond that the human eye cannot resolve it. Double-precision doesn't add anything in this case such as 3D games. It doesn't even add to performance. As a matter of fact it slows it down due to 64bits calculation. Double precision may comes in when alignment are important such as high performance CAD where each coordinate is absolutely needed at very fine resolution (only can be seen by zooming in and out). KNI is not needed for the mass. Maxwell

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