Diagrams.TwoD.Apollonian:descartes from diagrams-contrib-1.3.0.5

Percentage Accurate: 71.0% → 95.0%
Time: 11.7s
Alternatives: 8
Speedup: 1.0×

Specification

?
\[\begin{array}{l} \\ 2 \cdot \sqrt{\left(x \cdot y + x \cdot z\right) + y \cdot z} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (* 2.0 (sqrt (+ (+ (* x y) (* x z)) (* y z)))))
double code(double x, double y, double z) {
	return 2.0 * sqrt((((x * y) + (x * z)) + (y * z)));
}
real(8) function code(x, y, z)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    code = 2.0d0 * sqrt((((x * y) + (x * z)) + (y * z)))
end function
public static double code(double x, double y, double z) {
	return 2.0 * Math.sqrt((((x * y) + (x * z)) + (y * z)));
}
def code(x, y, z):
	return 2.0 * math.sqrt((((x * y) + (x * z)) + (y * z)))
function code(x, y, z)
	return Float64(2.0 * sqrt(Float64(Float64(Float64(x * y) + Float64(x * z)) + Float64(y * z))))
end
function tmp = code(x, y, z)
	tmp = 2.0 * sqrt((((x * y) + (x * z)) + (y * z)));
end
code[x_, y_, z_] := N[(2.0 * N[Sqrt[N[(N[(N[(x * y), $MachinePrecision] + N[(x * z), $MachinePrecision]), $MachinePrecision] + N[(y * z), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
2 \cdot \sqrt{\left(x \cdot y + x \cdot z\right) + y \cdot z}
\end{array}

Sampling outcomes in binary64 precision:

Local Percentage Accuracy vs ?

The average percentage accuracy by input value. Horizontal axis shows value of an input variable; the variable is choosen in the title. Vertical axis is accuracy; higher is better. Red represent the original program, while blue represents Herbie's suggestion. These can be toggled with buttons below the plot. The line is an average while dots represent individual samples.

Accuracy vs Speed?

Herbie found 8 alternatives:

AlternativeAccuracySpeedup
The accuracy (vertical axis) and speed (horizontal axis) of each alternatives. Up and to the right is better. The red square shows the initial program, and each blue circle shows an alternative.The line shows the best available speed-accuracy tradeoffs.

Initial Program: 71.0% accurate, 1.0× speedup?

\[\begin{array}{l} \\ 2 \cdot \sqrt{\left(x \cdot y + x \cdot z\right) + y \cdot z} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (* 2.0 (sqrt (+ (+ (* x y) (* x z)) (* y z)))))
double code(double x, double y, double z) {
	return 2.0 * sqrt((((x * y) + (x * z)) + (y * z)));
}
real(8) function code(x, y, z)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    code = 2.0d0 * sqrt((((x * y) + (x * z)) + (y * z)))
end function
public static double code(double x, double y, double z) {
	return 2.0 * Math.sqrt((((x * y) + (x * z)) + (y * z)));
}
def code(x, y, z):
	return 2.0 * math.sqrt((((x * y) + (x * z)) + (y * z)))
function code(x, y, z)
	return Float64(2.0 * sqrt(Float64(Float64(Float64(x * y) + Float64(x * z)) + Float64(y * z))))
end
function tmp = code(x, y, z)
	tmp = 2.0 * sqrt((((x * y) + (x * z)) + (y * z)));
end
code[x_, y_, z_] := N[(2.0 * N[Sqrt[N[(N[(N[(x * y), $MachinePrecision] + N[(x * z), $MachinePrecision]), $MachinePrecision] + N[(y * z), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
2 \cdot \sqrt{\left(x \cdot y + x \cdot z\right) + y \cdot z}
\end{array}

Alternative 1: 95.0% accurate, 0.1× speedup?

\[\begin{array}{l} [x, y, z] = \mathsf{sort}([x, y, z])\\ \\ \begin{array}{l} \mathbf{if}\;y \leq -4 \cdot 10^{+38}:\\ \;\;\;\;2 \cdot e^{\left(\log \left(\left(-z\right) - y\right) + \log \left(-x\right)\right) \cdot 0.5}\\ \mathbf{elif}\;y \leq 380000:\\ \;\;\;\;2 \cdot \sqrt{\left(y \cdot x + z \cdot x\right) + y \cdot z}\\ \mathbf{else}:\\ \;\;\;\;z \cdot \mathsf{fma}\left(x, y \cdot \sqrt{\frac{1}{\left(z \cdot \left(z \cdot z\right)\right) \cdot \left(y + x\right)}}, 2 \cdot \sqrt{\frac{y + x}{z}}\right)\\ \end{array} \end{array} \]
NOTE: x, y, and z should be sorted in increasing order before calling this function.
(FPCore (x y z)
 :precision binary64
 (if (<= y -4e+38)
   (* 2.0 (exp (* (+ (log (- (- z) y)) (log (- x))) 0.5)))
   (if (<= y 380000.0)
     (* 2.0 (sqrt (+ (+ (* y x) (* z x)) (* y z))))
     (*
      z
      (fma
       x
       (* y (sqrt (/ 1.0 (* (* z (* z z)) (+ y x)))))
       (* 2.0 (sqrt (/ (+ y x) z))))))))
assert(x < y && y < z);
double code(double x, double y, double z) {
	double tmp;
	if (y <= -4e+38) {
		tmp = 2.0 * exp(((log((-z - y)) + log(-x)) * 0.5));
	} else if (y <= 380000.0) {
		tmp = 2.0 * sqrt((((y * x) + (z * x)) + (y * z)));
	} else {
		tmp = z * fma(x, (y * sqrt((1.0 / ((z * (z * z)) * (y + x))))), (2.0 * sqrt(((y + x) / z))));
	}
	return tmp;
}
x, y, z = sort([x, y, z])
function code(x, y, z)
	tmp = 0.0
	if (y <= -4e+38)
		tmp = Float64(2.0 * exp(Float64(Float64(log(Float64(Float64(-z) - y)) + log(Float64(-x))) * 0.5)));
	elseif (y <= 380000.0)
		tmp = Float64(2.0 * sqrt(Float64(Float64(Float64(y * x) + Float64(z * x)) + Float64(y * z))));
	else
		tmp = Float64(z * fma(x, Float64(y * sqrt(Float64(1.0 / Float64(Float64(z * Float64(z * z)) * Float64(y + x))))), Float64(2.0 * sqrt(Float64(Float64(y + x) / z)))));
	end
	return tmp
end
NOTE: x, y, and z should be sorted in increasing order before calling this function.
code[x_, y_, z_] := If[LessEqual[y, -4e+38], N[(2.0 * N[Exp[N[(N[(N[Log[N[((-z) - y), $MachinePrecision]], $MachinePrecision] + N[Log[(-x)], $MachinePrecision]), $MachinePrecision] * 0.5), $MachinePrecision]], $MachinePrecision]), $MachinePrecision], If[LessEqual[y, 380000.0], N[(2.0 * N[Sqrt[N[(N[(N[(y * x), $MachinePrecision] + N[(z * x), $MachinePrecision]), $MachinePrecision] + N[(y * z), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision], N[(z * N[(x * N[(y * N[Sqrt[N[(1.0 / N[(N[(z * N[(z * z), $MachinePrecision]), $MachinePrecision] * N[(y + x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] + N[(2.0 * N[Sqrt[N[(N[(y + x), $MachinePrecision] / z), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
[x, y, z] = \mathsf{sort}([x, y, z])\\
\\
\begin{array}{l}
\mathbf{if}\;y \leq -4 \cdot 10^{+38}:\\
\;\;\;\;2 \cdot e^{\left(\log \left(\left(-z\right) - y\right) + \log \left(-x\right)\right) \cdot 0.5}\\

\mathbf{elif}\;y \leq 380000:\\
\;\;\;\;2 \cdot \sqrt{\left(y \cdot x + z \cdot x\right) + y \cdot z}\\

\mathbf{else}:\\
\;\;\;\;z \cdot \mathsf{fma}\left(x, y \cdot \sqrt{\frac{1}{\left(z \cdot \left(z \cdot z\right)\right) \cdot \left(y + x\right)}}, 2 \cdot \sqrt{\frac{y + x}{z}}\right)\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if y < -3.99999999999999991e38

    1. Initial program 36.5%

      \[2 \cdot \sqrt{\left(x \cdot y + x \cdot z\right) + y \cdot z} \]
    2. Add Preprocessing
    3. Taylor expanded in z around inf

      \[\leadsto 2 \cdot \sqrt{\color{blue}{z \cdot \left(x + \frac{x \cdot y}{z}\right)} + y \cdot z} \]
    4. Step-by-step derivation
      1. distribute-rgt-inN/A

        \[\leadsto 2 \cdot \sqrt{\color{blue}{\left(x \cdot z + \frac{x \cdot y}{z} \cdot z\right)} + y \cdot z} \]
      2. +-commutativeN/A

        \[\leadsto 2 \cdot \sqrt{\color{blue}{\left(\frac{x \cdot y}{z} \cdot z + x \cdot z\right)} + y \cdot z} \]
      3. associate-/l*N/A

        \[\leadsto 2 \cdot \sqrt{\left(\color{blue}{\left(x \cdot \frac{y}{z}\right)} \cdot z + x \cdot z\right) + y \cdot z} \]
      4. associate-*l*N/A

        \[\leadsto 2 \cdot \sqrt{\left(\color{blue}{x \cdot \left(\frac{y}{z} \cdot z\right)} + x \cdot z\right) + y \cdot z} \]
      5. distribute-lft-outN/A

        \[\leadsto 2 \cdot \sqrt{\color{blue}{x \cdot \left(\frac{y}{z} \cdot z + z\right)} + y \cdot z} \]
      6. lower-*.f64N/A

        \[\leadsto 2 \cdot \sqrt{\color{blue}{x \cdot \left(\frac{y}{z} \cdot z + z\right)} + y \cdot z} \]
      7. lower-fma.f64N/A

        \[\leadsto 2 \cdot \sqrt{x \cdot \color{blue}{\mathsf{fma}\left(\frac{y}{z}, z, z\right)} + y \cdot z} \]
      8. lower-/.f6431.7

        \[\leadsto 2 \cdot \sqrt{x \cdot \mathsf{fma}\left(\color{blue}{\frac{y}{z}}, z, z\right) + y \cdot z} \]
    5. Applied rewrites31.7%

      \[\leadsto 2 \cdot \sqrt{\color{blue}{x \cdot \mathsf{fma}\left(\frac{y}{z}, z, z\right)} + y \cdot z} \]
    6. Step-by-step derivation
      1. lift-sqrt.f64N/A

        \[\leadsto 2 \cdot \color{blue}{\sqrt{x \cdot \mathsf{fma}\left(\frac{y}{z}, z, z\right) + y \cdot z}} \]
      2. pow1/2N/A

        \[\leadsto 2 \cdot \color{blue}{{\left(x \cdot \mathsf{fma}\left(\frac{y}{z}, z, z\right) + y \cdot z\right)}^{\frac{1}{2}}} \]
      3. pow-to-expN/A

        \[\leadsto 2 \cdot \color{blue}{e^{\log \left(x \cdot \mathsf{fma}\left(\frac{y}{z}, z, z\right) + y \cdot z\right) \cdot \frac{1}{2}}} \]
      4. lower-exp.f64N/A

        \[\leadsto 2 \cdot \color{blue}{e^{\log \left(x \cdot \mathsf{fma}\left(\frac{y}{z}, z, z\right) + y \cdot z\right) \cdot \frac{1}{2}}} \]
      5. lower-*.f64N/A

        \[\leadsto 2 \cdot e^{\color{blue}{\log \left(x \cdot \mathsf{fma}\left(\frac{y}{z}, z, z\right) + y \cdot z\right) \cdot \frac{1}{2}}} \]
    7. Applied rewrites34.3%

      \[\leadsto 2 \cdot \color{blue}{e^{\log \left(\mathsf{fma}\left(y, z, x \cdot \left(y + z\right)\right)\right) \cdot 0.5}} \]
    8. Taylor expanded in x around -inf

      \[\leadsto 2 \cdot e^{\color{blue}{\left(\log \left(-1 \cdot y + -1 \cdot z\right) + -1 \cdot \log \left(\frac{-1}{x}\right)\right)} \cdot \frac{1}{2}} \]
    9. Step-by-step derivation
      1. mul-1-negN/A

        \[\leadsto 2 \cdot e^{\left(\log \left(-1 \cdot y + -1 \cdot z\right) + \color{blue}{\left(\mathsf{neg}\left(\log \left(\frac{-1}{x}\right)\right)\right)}\right) \cdot \frac{1}{2}} \]
      2. unsub-negN/A

        \[\leadsto 2 \cdot e^{\color{blue}{\left(\log \left(-1 \cdot y + -1 \cdot z\right) - \log \left(\frac{-1}{x}\right)\right)} \cdot \frac{1}{2}} \]
      3. lower--.f64N/A

        \[\leadsto 2 \cdot e^{\color{blue}{\left(\log \left(-1 \cdot y + -1 \cdot z\right) - \log \left(\frac{-1}{x}\right)\right)} \cdot \frac{1}{2}} \]
      4. lower-log.f64N/A

        \[\leadsto 2 \cdot e^{\left(\color{blue}{\log \left(-1 \cdot y + -1 \cdot z\right)} - \log \left(\frac{-1}{x}\right)\right) \cdot \frac{1}{2}} \]
      5. +-commutativeN/A

        \[\leadsto 2 \cdot e^{\left(\log \color{blue}{\left(-1 \cdot z + -1 \cdot y\right)} - \log \left(\frac{-1}{x}\right)\right) \cdot \frac{1}{2}} \]
      6. mul-1-negN/A

        \[\leadsto 2 \cdot e^{\left(\log \left(-1 \cdot z + \color{blue}{\left(\mathsf{neg}\left(y\right)\right)}\right) - \log \left(\frac{-1}{x}\right)\right) \cdot \frac{1}{2}} \]
      7. unsub-negN/A

        \[\leadsto 2 \cdot e^{\left(\log \color{blue}{\left(-1 \cdot z - y\right)} - \log \left(\frac{-1}{x}\right)\right) \cdot \frac{1}{2}} \]
      8. lower--.f64N/A

        \[\leadsto 2 \cdot e^{\left(\log \color{blue}{\left(-1 \cdot z - y\right)} - \log \left(\frac{-1}{x}\right)\right) \cdot \frac{1}{2}} \]
      9. mul-1-negN/A

        \[\leadsto 2 \cdot e^{\left(\log \left(\color{blue}{\left(\mathsf{neg}\left(z\right)\right)} - y\right) - \log \left(\frac{-1}{x}\right)\right) \cdot \frac{1}{2}} \]
      10. lower-neg.f64N/A

        \[\leadsto 2 \cdot e^{\left(\log \left(\color{blue}{\left(\mathsf{neg}\left(z\right)\right)} - y\right) - \log \left(\frac{-1}{x}\right)\right) \cdot \frac{1}{2}} \]
      11. lower-log.f64N/A

        \[\leadsto 2 \cdot e^{\left(\log \left(\left(\mathsf{neg}\left(z\right)\right) - y\right) - \color{blue}{\log \left(\frac{-1}{x}\right)}\right) \cdot \frac{1}{2}} \]
      12. lower-/.f6489.7

        \[\leadsto 2 \cdot e^{\left(\log \left(\left(-z\right) - y\right) - \log \color{blue}{\left(\frac{-1}{x}\right)}\right) \cdot 0.5} \]
    10. Applied rewrites89.7%

      \[\leadsto 2 \cdot e^{\color{blue}{\left(\log \left(\left(-z\right) - y\right) - \log \left(\frac{-1}{x}\right)\right)} \cdot 0.5} \]
    11. Step-by-step derivation
      1. Applied rewrites89.7%

        \[\leadsto 2 \cdot e^{\left(\log \left(\left(-z\right) - y\right) + \color{blue}{\log \left(-x\right)}\right) \cdot 0.5} \]

      if -3.99999999999999991e38 < y < 3.8e5

      1. Initial program 94.9%

        \[2 \cdot \sqrt{\left(x \cdot y + x \cdot z\right) + y \cdot z} \]
      2. Add Preprocessing

      if 3.8e5 < y

      1. Initial program 39.1%

        \[2 \cdot \sqrt{\left(x \cdot y + x \cdot z\right) + y \cdot z} \]
      2. Add Preprocessing
      3. Taylor expanded in x around 0

        \[\leadsto 2 \cdot \sqrt{\color{blue}{y \cdot z}} \]
      4. Step-by-step derivation
        1. lower-*.f6439.6

          \[\leadsto 2 \cdot \sqrt{\color{blue}{y \cdot z}} \]
      5. Applied rewrites39.6%

        \[\leadsto 2 \cdot \sqrt{\color{blue}{y \cdot z}} \]
      6. Taylor expanded in z around inf

        \[\leadsto \color{blue}{z \cdot \left(2 \cdot \sqrt{\frac{x + y}{z}} + \left(x \cdot y\right) \cdot \sqrt{\frac{1}{{z}^{3} \cdot \left(x + y\right)}}\right)} \]
      7. Step-by-step derivation
        1. lower-*.f64N/A

          \[\leadsto \color{blue}{z \cdot \left(2 \cdot \sqrt{\frac{x + y}{z}} + \left(x \cdot y\right) \cdot \sqrt{\frac{1}{{z}^{3} \cdot \left(x + y\right)}}\right)} \]
        2. +-commutativeN/A

          \[\leadsto z \cdot \color{blue}{\left(\left(x \cdot y\right) \cdot \sqrt{\frac{1}{{z}^{3} \cdot \left(x + y\right)}} + 2 \cdot \sqrt{\frac{x + y}{z}}\right)} \]
        3. associate-*l*N/A

          \[\leadsto z \cdot \left(\color{blue}{x \cdot \left(y \cdot \sqrt{\frac{1}{{z}^{3} \cdot \left(x + y\right)}}\right)} + 2 \cdot \sqrt{\frac{x + y}{z}}\right) \]
        4. lower-fma.f64N/A

          \[\leadsto z \cdot \color{blue}{\mathsf{fma}\left(x, y \cdot \sqrt{\frac{1}{{z}^{3} \cdot \left(x + y\right)}}, 2 \cdot \sqrt{\frac{x + y}{z}}\right)} \]
      8. Applied rewrites99.5%

        \[\leadsto \color{blue}{z \cdot \mathsf{fma}\left(x, y \cdot \sqrt{\frac{1}{\left(z \cdot \left(z \cdot z\right)\right) \cdot \left(x + y\right)}}, 2 \cdot \sqrt{\frac{x + y}{z}}\right)} \]
    12. Recombined 3 regimes into one program.
    13. Final simplification94.9%

      \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -4 \cdot 10^{+38}:\\ \;\;\;\;2 \cdot e^{\left(\log \left(\left(-z\right) - y\right) + \log \left(-x\right)\right) \cdot 0.5}\\ \mathbf{elif}\;y \leq 380000:\\ \;\;\;\;2 \cdot \sqrt{\left(y \cdot x + z \cdot x\right) + y \cdot z}\\ \mathbf{else}:\\ \;\;\;\;z \cdot \mathsf{fma}\left(x, y \cdot \sqrt{\frac{1}{\left(z \cdot \left(z \cdot z\right)\right) \cdot \left(y + x\right)}}, 2 \cdot \sqrt{\frac{y + x}{z}}\right)\\ \end{array} \]
    14. Add Preprocessing

    Alternative 2: 84.1% accurate, 0.4× speedup?

    \[\begin{array}{l} [x, y, z] = \mathsf{sort}([x, y, z])\\ \\ \begin{array}{l} \mathbf{if}\;y \leq 380000:\\ \;\;\;\;2 \cdot \sqrt{\left(y \cdot x + z \cdot x\right) + y \cdot z}\\ \mathbf{else}:\\ \;\;\;\;z \cdot \mathsf{fma}\left(x, y \cdot \sqrt{\frac{1}{\left(z \cdot \left(z \cdot z\right)\right) \cdot \left(y + x\right)}}, 2 \cdot \sqrt{\frac{y + x}{z}}\right)\\ \end{array} \end{array} \]
    NOTE: x, y, and z should be sorted in increasing order before calling this function.
    (FPCore (x y z)
     :precision binary64
     (if (<= y 380000.0)
       (* 2.0 (sqrt (+ (+ (* y x) (* z x)) (* y z))))
       (*
        z
        (fma
         x
         (* y (sqrt (/ 1.0 (* (* z (* z z)) (+ y x)))))
         (* 2.0 (sqrt (/ (+ y x) z)))))))
    assert(x < y && y < z);
    double code(double x, double y, double z) {
    	double tmp;
    	if (y <= 380000.0) {
    		tmp = 2.0 * sqrt((((y * x) + (z * x)) + (y * z)));
    	} else {
    		tmp = z * fma(x, (y * sqrt((1.0 / ((z * (z * z)) * (y + x))))), (2.0 * sqrt(((y + x) / z))));
    	}
    	return tmp;
    }
    
    x, y, z = sort([x, y, z])
    function code(x, y, z)
    	tmp = 0.0
    	if (y <= 380000.0)
    		tmp = Float64(2.0 * sqrt(Float64(Float64(Float64(y * x) + Float64(z * x)) + Float64(y * z))));
    	else
    		tmp = Float64(z * fma(x, Float64(y * sqrt(Float64(1.0 / Float64(Float64(z * Float64(z * z)) * Float64(y + x))))), Float64(2.0 * sqrt(Float64(Float64(y + x) / z)))));
    	end
    	return tmp
    end
    
    NOTE: x, y, and z should be sorted in increasing order before calling this function.
    code[x_, y_, z_] := If[LessEqual[y, 380000.0], N[(2.0 * N[Sqrt[N[(N[(N[(y * x), $MachinePrecision] + N[(z * x), $MachinePrecision]), $MachinePrecision] + N[(y * z), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision], N[(z * N[(x * N[(y * N[Sqrt[N[(1.0 / N[(N[(z * N[(z * z), $MachinePrecision]), $MachinePrecision] * N[(y + x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] + N[(2.0 * N[Sqrt[N[(N[(y + x), $MachinePrecision] / z), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
    
    \begin{array}{l}
    [x, y, z] = \mathsf{sort}([x, y, z])\\
    \\
    \begin{array}{l}
    \mathbf{if}\;y \leq 380000:\\
    \;\;\;\;2 \cdot \sqrt{\left(y \cdot x + z \cdot x\right) + y \cdot z}\\
    
    \mathbf{else}:\\
    \;\;\;\;z \cdot \mathsf{fma}\left(x, y \cdot \sqrt{\frac{1}{\left(z \cdot \left(z \cdot z\right)\right) \cdot \left(y + x\right)}}, 2 \cdot \sqrt{\frac{y + x}{z}}\right)\\
    
    
    \end{array}
    \end{array}
    
    Derivation
    1. Split input into 2 regimes
    2. if y < 3.8e5

      1. Initial program 79.0%

        \[2 \cdot \sqrt{\left(x \cdot y + x \cdot z\right) + y \cdot z} \]
      2. Add Preprocessing

      if 3.8e5 < y

      1. Initial program 46.7%

        \[2 \cdot \sqrt{\left(x \cdot y + x \cdot z\right) + y \cdot z} \]
      2. Add Preprocessing
      3. Taylor expanded in x around 0

        \[\leadsto 2 \cdot \sqrt{\color{blue}{y \cdot z}} \]
      4. Step-by-step derivation
        1. lower-*.f6446.6

          \[\leadsto 2 \cdot \sqrt{\color{blue}{y \cdot z}} \]
      5. Applied rewrites46.6%

        \[\leadsto 2 \cdot \sqrt{\color{blue}{y \cdot z}} \]
      6. Taylor expanded in z around inf

        \[\leadsto \color{blue}{z \cdot \left(2 \cdot \sqrt{\frac{x + y}{z}} + \left(x \cdot y\right) \cdot \sqrt{\frac{1}{{z}^{3} \cdot \left(x + y\right)}}\right)} \]
      7. Step-by-step derivation
        1. lower-*.f64N/A

          \[\leadsto \color{blue}{z \cdot \left(2 \cdot \sqrt{\frac{x + y}{z}} + \left(x \cdot y\right) \cdot \sqrt{\frac{1}{{z}^{3} \cdot \left(x + y\right)}}\right)} \]
        2. +-commutativeN/A

          \[\leadsto z \cdot \color{blue}{\left(\left(x \cdot y\right) \cdot \sqrt{\frac{1}{{z}^{3} \cdot \left(x + y\right)}} + 2 \cdot \sqrt{\frac{x + y}{z}}\right)} \]
        3. associate-*l*N/A

          \[\leadsto z \cdot \left(\color{blue}{x \cdot \left(y \cdot \sqrt{\frac{1}{{z}^{3} \cdot \left(x + y\right)}}\right)} + 2 \cdot \sqrt{\frac{x + y}{z}}\right) \]
        4. lower-fma.f64N/A

          \[\leadsto z \cdot \color{blue}{\mathsf{fma}\left(x, y \cdot \sqrt{\frac{1}{{z}^{3} \cdot \left(x + y\right)}}, 2 \cdot \sqrt{\frac{x + y}{z}}\right)} \]
      8. Applied rewrites99.6%

        \[\leadsto \color{blue}{z \cdot \mathsf{fma}\left(x, y \cdot \sqrt{\frac{1}{\left(z \cdot \left(z \cdot z\right)\right) \cdot \left(x + y\right)}}, 2 \cdot \sqrt{\frac{x + y}{z}}\right)} \]
    3. Recombined 2 regimes into one program.
    4. Final simplification84.1%

      \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq 380000:\\ \;\;\;\;2 \cdot \sqrt{\left(y \cdot x + z \cdot x\right) + y \cdot z}\\ \mathbf{else}:\\ \;\;\;\;z \cdot \mathsf{fma}\left(x, y \cdot \sqrt{\frac{1}{\left(z \cdot \left(z \cdot z\right)\right) \cdot \left(y + x\right)}}, 2 \cdot \sqrt{\frac{y + x}{z}}\right)\\ \end{array} \]
    5. Add Preprocessing

    Developer Target 1: 83.3% accurate, 0.0× speedup?

    \[\begin{array}{l} \\ \begin{array}{l} t_0 := 0.25 \cdot \left(\left({y}^{-0.75} \cdot \left({z}^{-0.75} \cdot x\right)\right) \cdot \left(y + z\right)\right) + {z}^{0.25} \cdot {y}^{0.25}\\ \mathbf{if}\;z < 7.636950090573675 \cdot 10^{+176}:\\ \;\;\;\;2 \cdot \sqrt{\left(x + y\right) \cdot z + x \cdot y}\\ \mathbf{else}:\\ \;\;\;\;\left(t\_0 \cdot t\_0\right) \cdot 2\\ \end{array} \end{array} \]
    (FPCore (x y z)
     :precision binary64
     (let* ((t_0
             (+
              (* 0.25 (* (* (pow y -0.75) (* (pow z -0.75) x)) (+ y z)))
              (* (pow z 0.25) (pow y 0.25)))))
       (if (< z 7.636950090573675e+176)
         (* 2.0 (sqrt (+ (* (+ x y) z) (* x y))))
         (* (* t_0 t_0) 2.0))))
    double code(double x, double y, double z) {
    	double t_0 = (0.25 * ((pow(y, -0.75) * (pow(z, -0.75) * x)) * (y + z))) + (pow(z, 0.25) * pow(y, 0.25));
    	double tmp;
    	if (z < 7.636950090573675e+176) {
    		tmp = 2.0 * sqrt((((x + y) * z) + (x * y)));
    	} else {
    		tmp = (t_0 * t_0) * 2.0;
    	}
    	return tmp;
    }
    
    real(8) function code(x, y, z)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        real(8), intent (in) :: z
        real(8) :: t_0
        real(8) :: tmp
        t_0 = (0.25d0 * (((y ** (-0.75d0)) * ((z ** (-0.75d0)) * x)) * (y + z))) + ((z ** 0.25d0) * (y ** 0.25d0))
        if (z < 7.636950090573675d+176) then
            tmp = 2.0d0 * sqrt((((x + y) * z) + (x * y)))
        else
            tmp = (t_0 * t_0) * 2.0d0
        end if
        code = tmp
    end function
    
    public static double code(double x, double y, double z) {
    	double t_0 = (0.25 * ((Math.pow(y, -0.75) * (Math.pow(z, -0.75) * x)) * (y + z))) + (Math.pow(z, 0.25) * Math.pow(y, 0.25));
    	double tmp;
    	if (z < 7.636950090573675e+176) {
    		tmp = 2.0 * Math.sqrt((((x + y) * z) + (x * y)));
    	} else {
    		tmp = (t_0 * t_0) * 2.0;
    	}
    	return tmp;
    }
    
    def code(x, y, z):
    	t_0 = (0.25 * ((math.pow(y, -0.75) * (math.pow(z, -0.75) * x)) * (y + z))) + (math.pow(z, 0.25) * math.pow(y, 0.25))
    	tmp = 0
    	if z < 7.636950090573675e+176:
    		tmp = 2.0 * math.sqrt((((x + y) * z) + (x * y)))
    	else:
    		tmp = (t_0 * t_0) * 2.0
    	return tmp
    
    function code(x, y, z)
    	t_0 = Float64(Float64(0.25 * Float64(Float64((y ^ -0.75) * Float64((z ^ -0.75) * x)) * Float64(y + z))) + Float64((z ^ 0.25) * (y ^ 0.25)))
    	tmp = 0.0
    	if (z < 7.636950090573675e+176)
    		tmp = Float64(2.0 * sqrt(Float64(Float64(Float64(x + y) * z) + Float64(x * y))));
    	else
    		tmp = Float64(Float64(t_0 * t_0) * 2.0);
    	end
    	return tmp
    end
    
    function tmp_2 = code(x, y, z)
    	t_0 = (0.25 * (((y ^ -0.75) * ((z ^ -0.75) * x)) * (y + z))) + ((z ^ 0.25) * (y ^ 0.25));
    	tmp = 0.0;
    	if (z < 7.636950090573675e+176)
    		tmp = 2.0 * sqrt((((x + y) * z) + (x * y)));
    	else
    		tmp = (t_0 * t_0) * 2.0;
    	end
    	tmp_2 = tmp;
    end
    
    code[x_, y_, z_] := Block[{t$95$0 = N[(N[(0.25 * N[(N[(N[Power[y, -0.75], $MachinePrecision] * N[(N[Power[z, -0.75], $MachinePrecision] * x), $MachinePrecision]), $MachinePrecision] * N[(y + z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + N[(N[Power[z, 0.25], $MachinePrecision] * N[Power[y, 0.25], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, If[Less[z, 7.636950090573675e+176], N[(2.0 * N[Sqrt[N[(N[(N[(x + y), $MachinePrecision] * z), $MachinePrecision] + N[(x * y), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision], N[(N[(t$95$0 * t$95$0), $MachinePrecision] * 2.0), $MachinePrecision]]]
    
    \begin{array}{l}
    
    \\
    \begin{array}{l}
    t_0 := 0.25 \cdot \left(\left({y}^{-0.75} \cdot \left({z}^{-0.75} \cdot x\right)\right) \cdot \left(y + z\right)\right) + {z}^{0.25} \cdot {y}^{0.25}\\
    \mathbf{if}\;z < 7.636950090573675 \cdot 10^{+176}:\\
    \;\;\;\;2 \cdot \sqrt{\left(x + y\right) \cdot z + x \cdot y}\\
    
    \mathbf{else}:\\
    \;\;\;\;\left(t\_0 \cdot t\_0\right) \cdot 2\\
    
    
    \end{array}
    \end{array}
    

    Reproduce

    ?
    herbie shell --seed 2024227 
    (FPCore (x y z)
      :name "Diagrams.TwoD.Apollonian:descartes from diagrams-contrib-1.3.0.5"
      :precision binary64
    
      :alt
      (! :herbie-platform default (if (< z 763695009057367500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000) (* 2 (sqrt (+ (* (+ x y) z) (* x y)))) (* (* (+ (* 1/4 (* (* (pow y -3/4) (* (pow z -3/4) x)) (+ y z))) (* (pow z 1/4) (pow y 1/4))) (+ (* 1/4 (* (* (pow y -3/4) (* (pow z -3/4) x)) (+ y z))) (* (pow z 1/4) (pow y 1/4)))) 2)))
    
      (* 2.0 (sqrt (+ (+ (* x y) (* x z)) (* y z)))))