Average Error: 0.0 → 0.0
Time: 35.2s
Precision: 64
\[\frac{-\left(f + n\right)}{f - n}\]
↓
\[\frac{-1}{\frac{f - n}{f + n}}\]
\frac{-\left(f + n\right)}{f - n}
↓
\frac{-1}{\frac{f - n}{f + n}}
double f(double f, double n) {
        double r1245028 = f;
        double r1245029 = n;
        double r1245030 = r1245028 + r1245029;
        double r1245031 = -r1245030;
        double r1245032 = r1245028 - r1245029;
        double r1245033 = r1245031 / r1245032;
        return r1245033;
}
↓
double f(double f, double n) {
        double r1245034 = -1.0;
        double r1245035 = f;
        double r1245036 = n;
        double r1245037 = r1245035 - r1245036;
        double r1245038 = r1245035 + r1245036;
        double r1245039 = r1245037 / r1245038;
        double r1245040 = r1245034 / r1245039;
        return r1245040;
}

Error

Bits error versus f

Bits error versus n

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.0

    \[\frac{-\left(f + n\right)}{f - n}\]
  2. Using strategy rm

  3. Applied neg-mul-10.0

    \[\leadsto \frac{\color{blue}{-1 \cdot \left(f + n\right)}}{f - n}\]

  4. Applied associate-/l*0.0

    \[\leadsto \color{blue}{\frac{-1}{\frac{f - n}{f + n}}}\]

  5. Final simplification0.0

    \[\leadsto \frac{-1}{\frac{f - n}{f + n}}\]

Reproduce

herbie shell --seed 2019168 
(FPCore (f n)
  :name "subtraction fraction"
  (/ (- (+ f n)) (- f n)))