Average Error: 0.0 → 0.0
Time: 15.7s
Precision: 64
\[re \cdot re - im \cdot im\]
↓
\[\left(re - im\right) \cdot \left(re + im\right)\]
re \cdot re - im \cdot im
↓
\left(re - im\right) \cdot \left(re + im\right)
double f(double re, double im) {
        double r8142 = re;
        double r8143 = r8142 * r8142;
        double r8144 = im;
        double r8145 = r8144 * r8144;
        double r8146 = r8143 - r8145;
        return r8146;
}
↓
double f(double re, double im) {
        double r8147 = re;
        double r8148 = im;
        double r8149 = r8147 - r8148;
        double r8150 = r8147 + r8148;
        double r8151 = r8149 * r8150;
        return r8151;
}

Error

Bits error versus re

Bits error versus im

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.0

    \[re \cdot re - im \cdot im\]

  2. Simplified0.0

    \[\leadsto \color{blue}{\left(re - im\right) \cdot \left(re + im\right)}\]

  3. Final simplification0.0

    \[\leadsto \left(re - im\right) \cdot \left(re + im\right)\]

Reproduce

herbie shell --seed 2019315 
(FPCore (re im)
  :name "math.square on complex, real part"
  :precision binary64
  (- (* re re) (* im im)))