Data.Colour.RGB:hslsv from colour-2.3.3, D

Average Error: 0.0 → 0.0

Time: 2.8s

Precision: binary64

Cost: 704

Math

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

↓

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

FPCore

(FPCore (x y) :precision binary64 (/ (- x y) (+ x y)))

↓

(FPCore (x y) :precision binary64 (- (/ x (+ x y)) (/ y (+ x y))))

C

double code(double x, double y) {
	return (x - y) / (x + y);
}

↓

double code(double x, double y) {
	return (x / (x + y)) - (y / (x + y));
}

Fortran

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 = (x / (x + y)) - (y / (x + y))
end function

Java

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

↓

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

Python

def code(x, y):
	return (x - y) / (x + y)

↓

def code(x, y):
	return (x / (x + y)) - (y / (x + y))

Julia

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

↓

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

MATLAB

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

↓

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

Wolfram

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

↓

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

Target

Original	0.0
Target	0.0
Herbie	0.0

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

Derivation

1. Initial program 0.0

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

2. Applied egg-rr 0.0

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

3. Final simplification 0.0

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

Alternatives

Alternative 1
Error	18.9
Cost	976

\[\begin{array}{l} t_0 := 2 \cdot \frac{x}{y} + -1\\ \mathbf{if}\;x \leq -1.6232220394304057 \cdot 10^{+111}:\\ \;\;\;\;1\\ \mathbf{elif}\;x \leq -4.394301526520648 \cdot 10^{-23}:\\ \;\;\;\;t_0\\ \mathbf{elif}\;x \leq -2.62599908884596 \cdot 10^{-137}:\\ \;\;\;\;1\\ \mathbf{elif}\;x \leq 7.767354888146388 \cdot 10^{-13}:\\ \;\;\;\;t_0\\ \mathbf{else}:\\ \;\;\;\;1\\ \end{array} \]

Alternative 2
Error	18.4
Cost	592

\[\begin{array}{l} \mathbf{if}\;x \leq -5.0923093039473 \cdot 10^{+72}:\\ \;\;\;\;1\\ \mathbf{elif}\;x \leq -4.394301526520648 \cdot 10^{-23}:\\ \;\;\;\;-1\\ \mathbf{elif}\;x \leq -1.3168784345700257 \cdot 10^{-111}:\\ \;\;\;\;1\\ \mathbf{elif}\;x \leq 4.779512336817855 \cdot 10^{-52}:\\ \;\;\;\;-1\\ \mathbf{else}:\\ \;\;\;\;1\\ \end{array} \]

Alternative 3
Error	0.0
Cost	448

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

Alternative 4
Error	32.5
Cost	64

\[-1 \]

Reproduce

herbie shell --seed 2022300 
(FPCore (x y)
  :name "Data.Colour.RGB:hslsv from colour-2.3.3, D"
  :precision binary64

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

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