Average Error: 0.0 → 0.0
Time: 1.7s
Precision: binary64
\[\frac{x + y}{x - y} \]
↓
\[\log \left(e^{\frac{x + y}{x - y}}\right) \]
(FPCore (x y) :precision binary64 (/ (+ x y) (- x y)))
↓
(FPCore (x y) :precision binary64 (log (exp (/ (+ x y) (- x y)))))
double code(double x, double y) {
	return (x + y) / (x - y);
}
↓
double code(double x, double y) {
	return log(exp(((x + y) / (x - y))));
}

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

public static double code(double x, double y) {
	return (x + y) / (x - y);
}
↓
public static double code(double x, double y) {
	return Math.log(Math.exp(((x + y) / (x - y))));
}

def code(x, y):
	return (x + y) / (x - y)
↓
def code(x, y):
	return math.log(math.exp(((x + y) / (x - y))))

function code(x, y)
	return Float64(Float64(x + y) / Float64(x - y))
end
↓
function code(x, y)
	return log(exp(Float64(Float64(x + y) / Float64(x - y))))
end

function tmp = code(x, y)
	tmp = (x + y) / (x - y);
end
↓
function tmp = code(x, y)
	tmp = log(exp(((x + y) / (x - y))));
end

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

\frac{x + y}{x - y}
↓
\log \left(e^{\frac{x + y}{x - y}}\right)

Error

Bits error versus x

Bits error versus y

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original0.0
Target0.0
Herbie0.0
\[\frac{1}{\frac{x}{x + y} - \frac{y}{x + y}} \]

Derivation

  1. Initial program 0.0

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

  2. Applied egg-rr0.0

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

  3. Final simplification0.0

    \[\leadsto \log \left(e^{\frac{x + y}{x - y}}\right) \]

Reproduce

herbie shell --seed 2022148 
(FPCore (x y)
  :name "Linear.Projection:perspective from linear-1.19.1.3, A"
  :precision binary64

  :herbie-target
  (/ 1.0 (- (/ x (+ x y)) (/ y (+ x y))))

  (/ (+ x y) (- x y)))