Tim Peters <tim.one@comcast.net>: > under FixedPoint's unusual "unbounded > before the decimal point, fixed # of digits after, and when mixing precision > the result gets the larger of the input precisions" rules, all of the > following are always exact operations: > > + - * This is true for + and -, but not * -- you need the sum of the input precisions to avoid losing information in that case. Greg Ewing, Computer Science Dept, +--------------------------------------+ University of Canterbury, | A citizen of NewZealandCorp, a | Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. | greg@cosc.canterbury.ac.nz +--------------------------------------+
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