Linear Equation Solver

            from math import *

def linear_equation(a, b, c) -> float:
    return ((c - b) / a)

assert abs(linear_equation(3, 6, 18) - 4) < 1e-6 * max(1.0, abs(4))
          

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

double linear_equation(double a, double b, double c) {
    return ((c - b) / a);
}

int main(void) {
    const double expected = 4;
    const double actual = linear_equation(3, 6, 18);
    assert(fabs(actual - expected) < 1e-6 * fmax(1.0, fabs(expected)));
}
          

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

double linear_equation(double a, double b, double c) {
    return ((c - b) / a);
}

int main() {
    constexpr double expected = 4;
    const double actual = linear_equation(3, 6, 18);
    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 linear_equation(double a, double b, double c)
; Linux x86-64 NASM · System V ABI · first eight doubles in xmm0–xmm7
global linear_equation
section .text

linear_equation:
    push rbp
    mov rbp, rsp
    sub rsp, 48
    movsd [rbp-8], xmm0
    movsd [rbp-16], xmm1
    movsd [rbp-24], xmm2
    movsd xmm0, [rbp-24]
    subsd xmm0, [rbp-16]
    movsd [rbp-40], xmm0
    movsd xmm0, [rbp-40]
    divsd xmm0, [rbp-8]
    movsd [rbp-32], xmm0
    movsd xmm0, [rbp-32]
    leave
    ret
          

            function result = linear_equation(a, b, c)
    result = ((c - b) / a);
end
          

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