Jensen–Shannon Entropy Gap Calculator

            from math import *

def jensen_shannon_entropy_gap_calculator(a, b) -> float:
    return (a - b)

assert abs(jensen_shannon_entropy_gap_calculator(2.4, 1.9) - 0.5) < 1e-6 * max(1.0, abs(0.5))
          

            #include <assert.h>
#include <math.h>

double jensen_shannon_entropy_gap_calculator(double a, double b) {
    return (a - b);
}

int main(void) {
    const double expected = 0.5;
    const double actual = jensen_shannon_entropy_gap_calculator(2.4, 1.9);
    assert(fabs(actual - expected) < 1e-6 * fmax(1.0, fabs(expected)));
}
          

            #include <cassert>
#include <cmath>
#include <numbers>

double jensen_shannon_entropy_gap_calculator(double a, double b) {
    return (a - b);
}

int main() {
    constexpr double expected = 0.5;
    const double actual = jensen_shannon_entropy_gap_calculator(2.4, 1.9);
    assert(std::fabs(actual - expected) < 1e-6 * std::fmax(1.0, std::fabs(expected)));
}
          

x86-64 NASM · System V ABI · Linux · SSE2 with libm where required

            ; double jensen_shannon_entropy_gap_calculator(double a, double b)
; Linux x86-64 NASM · System V ABI · first eight doubles in xmm0–xmm7
global jensen_shannon_entropy_gap_calculator
section .text

jensen_shannon_entropy_gap_calculator:
    push rbp
    mov rbp, rsp
    sub rsp, 32
    movsd [rbp-8], xmm0
    movsd [rbp-16], xmm1
    movsd xmm0, [rbp-8]
    subsd xmm0, [rbp-16]
    movsd [rbp-24], xmm0
    movsd xmm0, [rbp-24]
    leave
    ret
          

            function result = jensen_shannon_entropy_gap_calculator(a, b)
    result = (a - b);
end
          

            ClearAll[mwCalculate];
mwCalculate[a_, b_] := (a - b);