Ulp | search
Click here to view Ulp news from 60+ newspapers.
Bookmark or Share- testing - ULP unit of least precision - Stack OverflowNote that the ULP varies depending on the exponent. The exceptions I mentioned occur at the very largest representable finite value (where the number can only be increased by producing infinity), the very smallest (most negative) representable finite value, at zero and subnormal numbers (where special things happen with the fraction and the ...
- Calculate the unit in the last place (ULP) for doublesphoog_ULP(positive x)--> a positive number. Good. phoog_ULP(negative x)--> a negative number. I would expect positive number. To fix this I recommend instead: long bits = BitConverter.DoubleToInt64Bits(value) & 0x7FFFFFFFFFFFFFFFL; Below are fringe cases that need resolution should you care...
- On the definition of ulp (x) (unit in the last place)I have encountered the following definition of the Ulp (from this article 1, Definition 5.):. Despite something left unclear (does the word linearly in the definition mean that between two FP (floating point) numbers this function is linear -- not a constant) as I understand the ulp distance between two real numbers is proportional to the number of FPs between these numbers.
- floating point - Difference between ULP (unit in the last place) and ...From ULP Wikipedia's page:. Another definition, suggested by John Harrison, is slightly different: ULP(x) is the distance between the two closest straddling floating-point numbers a and b (i.e., those with a ≤ x ≤ b and a ≠ b), assuming that the exponent range is not upper-bounded.
- floating point - Units in the last place definition - Stack OverflowHaving 2 digits doesn't mean that 1 ulp is 0.01. The whole point of the unit is that it's relative to the precision of a particular number. 0.02 is 2.00 * 10 -2 ; 0.017 is 1.70 * 10 -2 ; there are 30 steps between 1.70 and 2.00 as
More
