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About Tuna-Fish

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    Curious George
  1. In my experience, a ghetto double double (11 bit exponent, 106 bit mantissa, implemented as a sum of two doubles, the smaller of which always has an exponent 53 less than the bigger) is nowhere near order of magnitude slower than x87 80bit, and can in some situations be faster, depending on the compiler, as the x87 stack is not always handled gracefully. Something like representing location as a double double and velocity as a double would give you much greater precision than plain doubles while still not being that much slower. X = Xa + Xb X' = X + Vx X'a = Xa + Vx X'b = Xb + (Vx - (X'a -Xa))
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