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General Purpose Decimal Arithmetic (speleotrove.com)
3 points by ChuckMcM 992 days ago | past | web | 1 comment

This came up in the Z80 and calculator threads, basically some folks care really really deeply about precision. I met Mike Cowlishaw at a conference and used his Java code in building a toy CAD system which could very accurately represent room sized things with a precision of 1 nanometer. (18 digits, 9 ahead and 9 behind the decimal point). Surprisingly it is not too bad carrying around theses 36 digit fixed point numbers.


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