Optimized Stack Operations

[deetee]

(02-25-2019 03:19 PM)Thomas Klemm Wrote:  Viktor T. Toth has implemented the Gamma function for a lot of calculators.
So you might find some inspirations.

This helped me a lot - now I calculate GAMMA with a shorter and more "stack friendly" formula (with a precision of at least 3 digits):

Code:

      GAMMA (due to formula of Nemes)
        COMMANDS (35): 1 + ENTER ENTER ENTER 10 * INV CHS ROTup 12 * + INV +
                       1 EXP / ROTup PWR ROTup INV SQRT * 2.506628 *

        Converts    4 mem  -    to:    -
        stack[]     ---------         ---                                 x + 1/(12*x - 1/10/x)
        (incl.      3  t   -           -         (x-1)! = sqrt(2*PI/x)* (----------------------)^x
        mem)        2  z   -           -                                            e
        from:       1  y   -           -
                    0  x   x           x!

But I still think that some bytes are to save with optimized stack handling.

Thanks