Average Error: 62.0 → 62.0
Time: 3.6s
Precision: 64
\[lo \lt -1 \cdot 10^{+308} \land hi \gt 10^{+308}\]
\[\frac{x - lo}{hi - lo}\]
↓
\[0\]
\frac{x - lo}{hi - lo}
↓
0
double f(double lo, double hi, double x) {
        double r83697 = x;
        double r83698 = lo;
        double r83699 = r83697 - r83698;
        double r83700 = hi;
        double r83701 = r83700 - r83698;
        double r83702 = r83699 / r83701;
        return r83702;
}
↓
double f(double __attribute__((unused)) lo, double __attribute__((unused)) hi, double __attribute__((unused)) x) {
        double r83703 = 0.0;
        return r83703;
}

Error

Bits error versus lo

Bits error versus hi

Bits error versus x

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 62.0

    \[\frac{x - lo}{hi - lo}\]

  2. Taylor expanded around -inf 62.0

    \[\leadsto \color{blue}{0}\]

  3. Final simplification62.0

    \[\leadsto 0\]

Reproduce

herbie shell --seed 2019104 +o rules:numerics
(FPCore (lo hi x)
  :name "(/ (- x lo) (- hi lo))"
  :pre (and (< lo -1e+308) (> hi 1e+308))
  (/ (- x lo) (- hi lo)))