Average Error: 0.0 → 0.0
Time: 14.6s
Precision: 64
\[\Re(\left(\frac{\left(\left(e^{\left(xre + xim i\right)}\right) + \left(e^{\left(-\left(xre + xim i\right)\right)}\right)\right)}{\left(2 + 0.0 i\right)}\right))\]
↓
\[\Re(\left(\frac{\left(\left(e^{\left(-\left(xre + xim i\right)\right)}\right) + \left(e^{\left(xre + xim i\right)}\right)\right)}{\left(2 + 0.0 i\right)}\right))\]
\Re(\left(\frac{\left(\left(e^{\left(xre + xim i\right)}\right) + \left(e^{\left(-\left(xre + xim i\right)\right)}\right)\right)}{\left(2 + 0.0 i\right)}\right))
↓
\Re(\left(\frac{\left(\left(e^{\left(-\left(xre + xim i\right)\right)}\right) + \left(e^{\left(xre + xim i\right)}\right)\right)}{\left(2 + 0.0 i\right)}\right))
double f(double xre, double xim) {
        double r8999 = xre;
        double r9000 = xim;
        double r9001 = /* ERROR: no complex support in C */;
        double r9002 = exp(r9001);
        double r9003 = -r9001;
        double r9004 = exp(r9003);
        double r9005 = r9002 + r9004;
        double r9006 = 2.0;
        double r9007 = 0.0;
        double r9008 = /* ERROR: no complex support in C */;
        double r9009 = r9005 / r9008;
        double r9010 = /* ERROR: no complex support in C */;
        return r9010;
}
↓
double f(double xre, double xim) {
        double r9011 = xre;
        double r9012 = xim;
        double r9013 = /* ERROR: no complex support in C */;
        double r9014 = -r9013;
        double r9015 = exp(r9014);
        double r9016 = exp(r9013);
        double r9017 = r9015 + r9016;
        double r9018 = 2.0;
        double r9019 = 0.0;
        double r9020 = /* ERROR: no complex support in C */;
        double r9021 = r9017 / r9020;
        double r9022 = /* ERROR: no complex support in C */;
        return r9022;
}

Error

Bits error versus xre

Bits error versus xim

Derivation

  1. Initial program 0.0

    \[\Re(\left(\frac{\left(\left(e^{\left(xre + xim i\right)}\right) + \left(e^{\left(-\left(xre + xim i\right)\right)}\right)\right)}{\left(2 + 0.0 i\right)}\right))\]

  2. Final simplification0.0

    \[\leadsto \Re(\left(\frac{\left(\left(e^{\left(-\left(xre + xim i\right)\right)}\right) + \left(e^{\left(xre + xim i\right)}\right)\right)}{\left(2 + 0.0 i\right)}\right))\]

Reproduce

herbie shell --seed 2019196 
(FPCore (xre xim)
  :name "exp with complex power real part (p55)"
  (re (/ (+ (exp (complex xre xim)) (exp (- (complex xre xim)))) (complex 2.0 0.0))))