2017年5月14日 · Note 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 ...

2020年4月28日 · If you want to count pulses while in deep sleep youuse the ULP. Code on the ULP continues to execute when the board wakes up and goes to normal power mode. So when it is awake, it will still run the counter on the ULP processor unless you stop the ULP periodic wake up timer, ULP will keep waking up and running while the main CPU is active.

2019年1月31日 · For a number x in the binary floating point number system, units in the last place is defined as ulp(x) = 2^{E(x)} * 2^{1 - p} = 2^{E(x)}*epsilon, where the exponent is the exponent of the base 2 used to represent x, p is the precision of the number format (53 for the double precision format), and epsilon = 2^{1-p} is the machine tolerance.

2021年3月15日 · 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 …

2012年2月28日 · phoog_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...

2014年7月9日 · /* * use a precalculated value for the ulp of Double.MAX_VALUE */ private static final double MAX_ULP = 1.9958403095347198E292; /** * Returns the size of an ulp (units in the last place) of the argument.

2020年6月29日 · 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 …

2021年3月12日 · My application should initialize the ULP coprocessor and the coprocessor should observe one GPIO. The ULP Timer should wake up the coprocessor in certain intervals and then the coprocessor should check the GPIO and turn on an LED, depending on the state of the GPIO. I use the following code: main.cpp

2018年5月14日 · Having 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

2012年12月19日 · Subtracting this from 1 (which is 0x10p-4) yields 0xe.8ba2e8p-4. Since an ULP of 1 is 0x1p-23, that is 0xe.8ba2e8p19 ULP = 0xe8ba2e.8/2 ULP (shifted 20 bits and divided by 2, netting 19 bits) = 0x745d17.4 ULP. That exceeds the specified tolerance of 0x745d17, so the correct answer would be 0.