Average Error: 10.3 → 0.2
Time: 1.5s
Precision: binary64
\[\frac{x}{y \cdot y} \]
↓
\[\frac{\frac{-x}{y}}{-y} \]
(FPCore (x y) :precision binary64 (/ x (* y y)))
↓
(FPCore (x y) :precision binary64 (/ (/ (- x) y) (- y)))
double code(double x, double y) {
	return x / (y * y);
}
↓
double code(double x, double y) {
	return (-x / y) / -y;
}

real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = x / (y * y)
end function
↓
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = (-x / y) / -y
end function

public static double code(double x, double y) {
	return x / (y * y);
}
↓
public static double code(double x, double y) {
	return (-x / y) / -y;
}

def code(x, y):
	return x / (y * y)
↓
def code(x, y):
	return (-x / y) / -y

function code(x, y)
	return Float64(x / Float64(y * y))
end
↓
function code(x, y)
	return Float64(Float64(Float64(-x) / y) / Float64(-y))
end

function tmp = code(x, y)
	tmp = x / (y * y);
end
↓
function tmp = code(x, y)
	tmp = (-x / y) / -y;
end

code[x_, y_] := N[(x / N[(y * y), $MachinePrecision]), $MachinePrecision]
↓
code[x_, y_] := N[(N[((-x) / y), $MachinePrecision] / (-y)), $MachinePrecision]

\frac{x}{y \cdot y}
↓
\frac{\frac{-x}{y}}{-y}

Error

Bits error versus x

Bits error versus y

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original10.3
Target0.2
Herbie0.2
\[\frac{\frac{x}{y}}{y} \]

Derivation

  1. Initial program 10.3

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

  2. Applied egg-rr0.6

    \[\leadsto \color{blue}{{\left(\frac{y}{\frac{x}{y}}\right)}^{-1}} \]

  3. Applied egg-rr0.2

    \[\leadsto \color{blue}{\frac{\frac{-x}{y}}{-y}} \]

  4. Final simplification0.2

    \[\leadsto \frac{\frac{-x}{y}}{-y} \]

Reproduce

herbie shell --seed 2022162 
(FPCore (x y)
  :name "Physics.ForceLayout:coulombForce from force-layout-0.4.0.2"
  :precision binary64

  :herbie-target
  (/ (/ x y) y)

  (/ x (* y y)))