Average Error: 6.5 → 0.1
Time: 2.2s
Precision: binary64
\[x + \frac{y \cdot y}{z}\]
↓
\[x + y \cdot \frac{y}{z}\]
x + \frac{y \cdot y}{z}
↓
x + y \cdot \frac{y}{z}
(FPCore (x y z) :precision binary64 (+ x (/ (* y y) z)))
↓
(FPCore (x y z) :precision binary64 (+ x (* y (/ y z))))
double code(double x, double y, double z) {
	return ((double) (x + (((double) (y * y)) / z)));
}
↓
double code(double x, double y, double z) {
	return ((double) (x + ((double) (y * (y / z)))));
}

Error

Bits error versus x

Bits error versus y

Bits error versus z

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original6.5
Target0.1
Herbie0.1
\[x + y \cdot \frac{y}{z}\]

Derivation

  1. Initial program Error: 6.5 bits

    \[x + \frac{y \cdot y}{z}\]

  2. SimplifiedError: 0.1 bits

    \[\leadsto \color{blue}{x + y \cdot \frac{y}{z}}\]

  3. Final simplificationError: 0.1 bits

    \[\leadsto x + y \cdot \frac{y}{z}\]

Reproduce

herbie shell --seed 2020204 
(FPCore (x y z)
  :name "Crypto.Random.Test:calculate from crypto-random-0.0.9"
  :precision binary64

  :herbie-target
  (+ x (* y (/ y z)))

  (+ x (/ (* y y) z)))