Graphics.Rendering.Chart.Drawing:drawTextsR from Chart-1.5.3

Average Accuracy: 78.8% → 78.8%

Time: 6.8s

Precision: binary64

Cost: 448

Math

\[x \cdot y + \left(x - 1\right) \cdot z \]

↓

\[x \cdot \left(y + z\right) - z \]

FPCore

(FPCore (x y z) :precision binary64 (+ (* x y) (* (- x 1.0) z)))

↓

(FPCore (x y z) :precision binary64 (- (* x (+ y z)) z))

C

double code(double x, double y, double z) {
	return (x * y) + ((x - 1.0) * z);
}

↓

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

Fortran

real(8) function code(x, y, z)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    code = (x * y) + ((x - 1.0d0) * z)
end function

↓

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

Java

public static double code(double x, double y, double z) {
	return (x * y) + ((x - 1.0) * z);
}

↓

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

Python

def code(x, y, z):
	return (x * y) + ((x - 1.0) * z)

↓

def code(x, y, z):
	return (x * (y + z)) - z

Julia

function code(x, y, z)
	return Float64(Float64(x * y) + Float64(Float64(x - 1.0) * z))
end

↓

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

MATLAB

function tmp = code(x, y, z)
	tmp = (x * y) + ((x - 1.0) * z);
end

↓

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

Wolfram

code[x_, y_, z_] := N[(N[(x * y), $MachinePrecision] + N[(N[(x - 1.0), $MachinePrecision] * z), $MachinePrecision]), $MachinePrecision]

↓

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

Derivation

1. Initial program 78.8%

   \[x \cdot y + \left(x - 1\right) \cdot z \]

2. Simplified 78.8%

   \[\leadsto \color{blue}{x \cdot \left(y + z\right) - z} \]
   Proof

   [Start] 78.8	\[ x \cdot y + \left(x - 1\right) \cdot z \]
   *-commutative [=>] 78.8	\[ x \cdot y + \color{blue}{z \cdot \left(x - 1\right)} \]
   sub-neg [=>] 78.8	\[ x \cdot y + z \cdot \color{blue}{\left(x + \left(-1\right)\right)} \]
   distribute-rgt-in [=>] 78.8	\[ x \cdot y + \color{blue}{\left(x \cdot z + \left(-1\right) \cdot z\right)} \]
   associate-+r+ [=>] 78.8	\[ \color{blue}{\left(x \cdot y + x \cdot z\right) + \left(-1\right) \cdot z} \]
   metadata-eval [=>] 78.8	\[ \left(x \cdot y + x \cdot z\right) + \color{blue}{-1} \cdot z \]
   mul-1-neg [=>] 78.8	\[ \left(x \cdot y + x \cdot z\right) + \color{blue}{\left(-z\right)} \]
   unsub-neg [=>] 78.8	\[ \color{blue}{\left(x \cdot y + x \cdot z\right) - z} \]
   distribute-lft-out [=>] 78.8	\[ \color{blue}{x \cdot \left(y + z\right)} - z \]

3. Final simplification 78.8%

   \[\leadsto x \cdot \left(y + z\right) - z \]

Alternatives

Alternative 1
Accuracy	63.3%
Cost	848

\[\begin{array}{l} t_0 := x \cdot \left(y + z\right)\\ \mathbf{if}\;x \leq -1.95 \cdot 10^{-50}:\\ \;\;\;\;t_0\\ \mathbf{elif}\;x \leq 3.1 \cdot 10^{-106}:\\ \;\;\;\;-z\\ \mathbf{elif}\;x \leq 2.4 \cdot 10^{-77}:\\ \;\;\;\;x \cdot y\\ \mathbf{elif}\;x \leq 1.3 \cdot 10^{-6}:\\ \;\;\;\;-z\\ \mathbf{else}:\\ \;\;\;\;t_0\\ \end{array} \]

Alternative 2
Accuracy	47.7%
Cost	720

\[\begin{array}{l} \mathbf{if}\;z \leq -7.2 \cdot 10^{-62}:\\ \;\;\;\;-z\\ \mathbf{elif}\;z \leq 9.5 \cdot 10^{-91}:\\ \;\;\;\;x \cdot y\\ \mathbf{elif}\;z \leq 2.35 \cdot 10^{+73}:\\ \;\;\;\;-z\\ \mathbf{elif}\;z \leq 4.7 \cdot 10^{+123}:\\ \;\;\;\;x \cdot z\\ \mathbf{else}:\\ \;\;\;\;-z\\ \end{array} \]

Alternative 3
Accuracy	63.1%
Cost	585

\[\begin{array}{l} \mathbf{if}\;z \leq -2.25 \cdot 10^{-60} \lor \neg \left(z \leq 4.2 \cdot 10^{-60}\right):\\ \;\;\;\;z \cdot \left(x + -1\right)\\ \mathbf{else}:\\ \;\;\;\;x \cdot \left(y + z\right)\\ \end{array} \]

Alternative 4
Accuracy	63.2%
Cost	584

\[\begin{array}{l} \mathbf{if}\;z \leq -2.95 \cdot 10^{-59}:\\ \;\;\;\;x \cdot z - z\\ \mathbf{elif}\;z \leq 9.5 \cdot 10^{-58}:\\ \;\;\;\;x \cdot \left(y + z\right)\\ \mathbf{else}:\\ \;\;\;\;z \cdot \left(x + -1\right)\\ \end{array} \]

Alternative 5
Accuracy	48.5%
Cost	456

\[\begin{array}{l} \mathbf{if}\;z \leq -7 \cdot 10^{-62}:\\ \;\;\;\;-z\\ \mathbf{elif}\;z \leq 4.7 \cdot 10^{-91}:\\ \;\;\;\;x \cdot y\\ \mathbf{else}:\\ \;\;\;\;-z\\ \end{array} \]

Alternative 6
Accuracy	36.1%
Cost	128

\[-z \]

Reproduce

herbie shell --seed 2023153 
(FPCore (x y z)
  :name "Graphics.Rendering.Chart.Drawing:drawTextsR from Chart-1.5.3"
  :precision binary64
  (+ (* x y) (* (- x 1.0) z)))