Graphics.Rendering.Chart.Backend.Diagrams:calcFontMetrics from Chart-diagrams-1.5.1, A

Percentage Accurate: 88.3% → 99.8%
Time: 7.3s
Alternatives: 13
Speedup: 0.3×

Specification

?
\[\begin{array}{l} \\ \frac{x + y}{1 - \frac{y}{z}} \end{array} \]
(FPCore (x y z) :precision binary64 (/ (+ x y) (- 1.0 (/ y z))))
double code(double x, double y, double z) {
	return (x + y) / (1.0 - (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 = (x + y) / (1.0d0 - (y / z))
end function
public static double code(double x, double y, double z) {
	return (x + y) / (1.0 - (y / z));
}
def code(x, y, z):
	return (x + y) / (1.0 - (y / z))
function code(x, y, z)
	return Float64(Float64(x + y) / Float64(1.0 - Float64(y / z)))
end
function tmp = code(x, y, z)
	tmp = (x + y) / (1.0 - (y / z));
end
code[x_, y_, z_] := N[(N[(x + y), $MachinePrecision] / N[(1.0 - N[(y / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
\frac{x + y}{1 - \frac{y}{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 13 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: 88.3% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \frac{x + y}{1 - \frac{y}{z}} \end{array} \]
(FPCore (x y z) :precision binary64 (/ (+ x y) (- 1.0 (/ y z))))
double code(double x, double y, double z) {
	return (x + y) / (1.0 - (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 = (x + y) / (1.0d0 - (y / z))
end function
public static double code(double x, double y, double z) {
	return (x + y) / (1.0 - (y / z));
}
def code(x, y, z):
	return (x + y) / (1.0 - (y / z))
function code(x, y, z)
	return Float64(Float64(x + y) / Float64(1.0 - Float64(y / z)))
end
function tmp = code(x, y, z)
	tmp = (x + y) / (1.0 - (y / z));
end
code[x_, y_, z_] := N[(N[(x + y), $MachinePrecision] / N[(1.0 - N[(y / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
\frac{x + y}{1 - \frac{y}{z}}
\end{array}

Alternative 1: 99.8% accurate, 0.3× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \frac{x + y}{1 - \frac{y}{z}}\\ \mathbf{if}\;t_0 \leq -4 \cdot 10^{-275} \lor \neg \left(t_0 \leq 0\right):\\ \;\;\;\;t_0\\ \mathbf{else}:\\ \;\;\;\;z \cdot \frac{\left(-x\right) - y}{y}\\ \end{array} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (let* ((t_0 (/ (+ x y) (- 1.0 (/ y z)))))
   (if (or (<= t_0 -4e-275) (not (<= t_0 0.0))) t_0 (* z (/ (- (- x) y) y)))))
double code(double x, double y, double z) {
	double t_0 = (x + y) / (1.0 - (y / z));
	double tmp;
	if ((t_0 <= -4e-275) || !(t_0 <= 0.0)) {
		tmp = t_0;
	} else {
		tmp = z * ((-x - y) / y);
	}
	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 = (x + y) / (1.0d0 - (y / z))
    if ((t_0 <= (-4d-275)) .or. (.not. (t_0 <= 0.0d0))) then
        tmp = t_0
    else
        tmp = z * ((-x - y) / y)
    end if
    code = tmp
end function
public static double code(double x, double y, double z) {
	double t_0 = (x + y) / (1.0 - (y / z));
	double tmp;
	if ((t_0 <= -4e-275) || !(t_0 <= 0.0)) {
		tmp = t_0;
	} else {
		tmp = z * ((-x - y) / y);
	}
	return tmp;
}
def code(x, y, z):
	t_0 = (x + y) / (1.0 - (y / z))
	tmp = 0
	if (t_0 <= -4e-275) or not (t_0 <= 0.0):
		tmp = t_0
	else:
		tmp = z * ((-x - y) / y)
	return tmp
function code(x, y, z)
	t_0 = Float64(Float64(x + y) / Float64(1.0 - Float64(y / z)))
	tmp = 0.0
	if ((t_0 <= -4e-275) || !(t_0 <= 0.0))
		tmp = t_0;
	else
		tmp = Float64(z * Float64(Float64(Float64(-x) - y) / y));
	end
	return tmp
end
function tmp_2 = code(x, y, z)
	t_0 = (x + y) / (1.0 - (y / z));
	tmp = 0.0;
	if ((t_0 <= -4e-275) || ~((t_0 <= 0.0)))
		tmp = t_0;
	else
		tmp = z * ((-x - y) / y);
	end
	tmp_2 = tmp;
end
code[x_, y_, z_] := Block[{t$95$0 = N[(N[(x + y), $MachinePrecision] / N[(1.0 - N[(y / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, If[Or[LessEqual[t$95$0, -4e-275], N[Not[LessEqual[t$95$0, 0.0]], $MachinePrecision]], t$95$0, N[(z * N[(N[((-x) - y), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}

\\
\begin{array}{l}
t_0 := \frac{x + y}{1 - \frac{y}{z}}\\
\mathbf{if}\;t_0 \leq -4 \cdot 10^{-275} \lor \neg \left(t_0 \leq 0\right):\\
\;\;\;\;t_0\\

\mathbf{else}:\\
\;\;\;\;z \cdot \frac{\left(-x\right) - y}{y}\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if (/.f64 (+.f64 x y) (-.f64 1 (/.f64 y z))) < -3.99999999999999974e-275 or -0.0 < (/.f64 (+.f64 x y) (-.f64 1 (/.f64 y z)))

    1. Initial program 99.9%

      \[\frac{x + y}{1 - \frac{y}{z}} \]

    if -3.99999999999999974e-275 < (/.f64 (+.f64 x y) (-.f64 1 (/.f64 y z))) < -0.0

    1. Initial program 6.0%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around inf 6.0%

      \[\leadsto \frac{x + y}{\color{blue}{-1 \cdot \frac{y}{z}}} \]
    3. Step-by-step derivation
      1. neg-mul-16.0%

        \[\leadsto \frac{x + y}{\color{blue}{-\frac{y}{z}}} \]
      2. distribute-neg-frac6.0%

        \[\leadsto \frac{x + y}{\color{blue}{\frac{-y}{z}}} \]
    4. Simplified6.0%

      \[\leadsto \frac{x + y}{\color{blue}{\frac{-y}{z}}} \]
    5. Step-by-step derivation
      1. frac-2neg6.0%

        \[\leadsto \frac{x + y}{\color{blue}{\frac{-\left(-y\right)}{-z}}} \]
      2. remove-double-neg6.0%

        \[\leadsto \frac{x + y}{\frac{\color{blue}{y}}{-z}} \]
      3. associate-/r/100.0%

        \[\leadsto \color{blue}{\frac{x + y}{y} \cdot \left(-z\right)} \]
      4. +-commutative100.0%

        \[\leadsto \frac{\color{blue}{y + x}}{y} \cdot \left(-z\right) \]
    6. Applied egg-rr100.0%

      \[\leadsto \color{blue}{\frac{y + x}{y} \cdot \left(-z\right)} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification99.9%

    \[\leadsto \begin{array}{l} \mathbf{if}\;\frac{x + y}{1 - \frac{y}{z}} \leq -4 \cdot 10^{-275} \lor \neg \left(\frac{x + y}{1 - \frac{y}{z}} \leq 0\right):\\ \;\;\;\;\frac{x + y}{1 - \frac{y}{z}}\\ \mathbf{else}:\\ \;\;\;\;z \cdot \frac{\left(-x\right) - y}{y}\\ \end{array} \]

Alternative 2: 69.5% accurate, 0.6× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \left(x + y\right) \cdot \frac{-z}{y}\\ \mathbf{if}\;y \leq -1.02 \cdot 10^{+138}:\\ \;\;\;\;-z\\ \mathbf{elif}\;y \leq -1.3 \cdot 10^{-45}:\\ \;\;\;\;t_0\\ \mathbf{elif}\;y \leq 5.5 \cdot 10^{+46}:\\ \;\;\;\;x + y\\ \mathbf{elif}\;y \leq 9 \cdot 10^{+156}:\\ \;\;\;\;t_0\\ \mathbf{else}:\\ \;\;\;\;-z\\ \end{array} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (let* ((t_0 (* (+ x y) (/ (- z) y))))
   (if (<= y -1.02e+138)
     (- z)
     (if (<= y -1.3e-45)
       t_0
       (if (<= y 5.5e+46) (+ x y) (if (<= y 9e+156) t_0 (- z)))))))
double code(double x, double y, double z) {
	double t_0 = (x + y) * (-z / y);
	double tmp;
	if (y <= -1.02e+138) {
		tmp = -z;
	} else if (y <= -1.3e-45) {
		tmp = t_0;
	} else if (y <= 5.5e+46) {
		tmp = x + y;
	} else if (y <= 9e+156) {
		tmp = t_0;
	} else {
		tmp = -z;
	}
	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 = (x + y) * (-z / y)
    if (y <= (-1.02d+138)) then
        tmp = -z
    else if (y <= (-1.3d-45)) then
        tmp = t_0
    else if (y <= 5.5d+46) then
        tmp = x + y
    else if (y <= 9d+156) then
        tmp = t_0
    else
        tmp = -z
    end if
    code = tmp
end function
public static double code(double x, double y, double z) {
	double t_0 = (x + y) * (-z / y);
	double tmp;
	if (y <= -1.02e+138) {
		tmp = -z;
	} else if (y <= -1.3e-45) {
		tmp = t_0;
	} else if (y <= 5.5e+46) {
		tmp = x + y;
	} else if (y <= 9e+156) {
		tmp = t_0;
	} else {
		tmp = -z;
	}
	return tmp;
}
def code(x, y, z):
	t_0 = (x + y) * (-z / y)
	tmp = 0
	if y <= -1.02e+138:
		tmp = -z
	elif y <= -1.3e-45:
		tmp = t_0
	elif y <= 5.5e+46:
		tmp = x + y
	elif y <= 9e+156:
		tmp = t_0
	else:
		tmp = -z
	return tmp
function code(x, y, z)
	t_0 = Float64(Float64(x + y) * Float64(Float64(-z) / y))
	tmp = 0.0
	if (y <= -1.02e+138)
		tmp = Float64(-z);
	elseif (y <= -1.3e-45)
		tmp = t_0;
	elseif (y <= 5.5e+46)
		tmp = Float64(x + y);
	elseif (y <= 9e+156)
		tmp = t_0;
	else
		tmp = Float64(-z);
	end
	return tmp
end
function tmp_2 = code(x, y, z)
	t_0 = (x + y) * (-z / y);
	tmp = 0.0;
	if (y <= -1.02e+138)
		tmp = -z;
	elseif (y <= -1.3e-45)
		tmp = t_0;
	elseif (y <= 5.5e+46)
		tmp = x + y;
	elseif (y <= 9e+156)
		tmp = t_0;
	else
		tmp = -z;
	end
	tmp_2 = tmp;
end
code[x_, y_, z_] := Block[{t$95$0 = N[(N[(x + y), $MachinePrecision] * N[((-z) / y), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[y, -1.02e+138], (-z), If[LessEqual[y, -1.3e-45], t$95$0, If[LessEqual[y, 5.5e+46], N[(x + y), $MachinePrecision], If[LessEqual[y, 9e+156], t$95$0, (-z)]]]]]
\begin{array}{l}

\\
\begin{array}{l}
t_0 := \left(x + y\right) \cdot \frac{-z}{y}\\
\mathbf{if}\;y \leq -1.02 \cdot 10^{+138}:\\
\;\;\;\;-z\\

\mathbf{elif}\;y \leq -1.3 \cdot 10^{-45}:\\
\;\;\;\;t_0\\

\mathbf{elif}\;y \leq 5.5 \cdot 10^{+46}:\\
\;\;\;\;x + y\\

\mathbf{elif}\;y \leq 9 \cdot 10^{+156}:\\
\;\;\;\;t_0\\

\mathbf{else}:\\
\;\;\;\;-z\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if y < -1.02e138 or 9.00000000000000061e156 < y

    1. Initial program 63.7%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around inf 84.8%

      \[\leadsto \color{blue}{-1 \cdot z} \]
    3. Step-by-step derivation
      1. mul-1-neg84.8%

        \[\leadsto \color{blue}{-z} \]
    4. Simplified84.8%

      \[\leadsto \color{blue}{-z} \]

    if -1.02e138 < y < -1.29999999999999993e-45 or 5.4999999999999998e46 < y < 9.00000000000000061e156

    1. Initial program 88.1%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in z around 0 75.7%

      \[\leadsto \color{blue}{-1 \cdot \frac{z \cdot \left(x + y\right)}{y}} \]
    3. Step-by-step derivation
      1. mul-1-neg75.7%

        \[\leadsto \color{blue}{-\frac{z \cdot \left(x + y\right)}{y}} \]
      2. associate-/l*74.1%

        \[\leadsto -\color{blue}{\frac{z}{\frac{y}{x + y}}} \]
      3. associate-/r/66.4%

        \[\leadsto -\color{blue}{\frac{z}{y} \cdot \left(x + y\right)} \]
      4. distribute-rgt-neg-in66.4%

        \[\leadsto \color{blue}{\frac{z}{y} \cdot \left(-\left(x + y\right)\right)} \]
      5. distribute-neg-in66.4%

        \[\leadsto \frac{z}{y} \cdot \color{blue}{\left(\left(-x\right) + \left(-y\right)\right)} \]
      6. unsub-neg66.4%

        \[\leadsto \frac{z}{y} \cdot \color{blue}{\left(\left(-x\right) - y\right)} \]
    4. Simplified66.4%

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

    if -1.29999999999999993e-45 < y < 5.4999999999999998e46

    1. Initial program 99.9%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in z around inf 77.4%

      \[\leadsto \color{blue}{x + y} \]
    3. Step-by-step derivation
      1. +-commutative77.4%

        \[\leadsto \color{blue}{y + x} \]
    4. Simplified77.4%

      \[\leadsto \color{blue}{y + x} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification76.5%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -1.02 \cdot 10^{+138}:\\ \;\;\;\;-z\\ \mathbf{elif}\;y \leq -1.3 \cdot 10^{-45}:\\ \;\;\;\;\left(x + y\right) \cdot \frac{-z}{y}\\ \mathbf{elif}\;y \leq 5.5 \cdot 10^{+46}:\\ \;\;\;\;x + y\\ \mathbf{elif}\;y \leq 9 \cdot 10^{+156}:\\ \;\;\;\;\left(x + y\right) \cdot \frac{-z}{y}\\ \mathbf{else}:\\ \;\;\;\;-z\\ \end{array} \]

Alternative 3: 69.8% accurate, 0.7× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_0 := 1 - \frac{y}{z}\\ \mathbf{if}\;y \leq -1.08 \cdot 10^{+139}:\\ \;\;\;\;-z\\ \mathbf{elif}\;y \leq -1.15 \cdot 10^{-14}:\\ \;\;\;\;\frac{y}{t_0}\\ \mathbf{elif}\;y \leq -1.65 \cdot 10^{-65}:\\ \;\;\;\;\frac{x}{t_0}\\ \mathbf{elif}\;y \leq 1.2 \cdot 10^{+104}:\\ \;\;\;\;x + y\\ \mathbf{else}:\\ \;\;\;\;-z\\ \end{array} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (let* ((t_0 (- 1.0 (/ y z))))
   (if (<= y -1.08e+139)
     (- z)
     (if (<= y -1.15e-14)
       (/ y t_0)
       (if (<= y -1.65e-65) (/ x t_0) (if (<= y 1.2e+104) (+ x y) (- z)))))))
double code(double x, double y, double z) {
	double t_0 = 1.0 - (y / z);
	double tmp;
	if (y <= -1.08e+139) {
		tmp = -z;
	} else if (y <= -1.15e-14) {
		tmp = y / t_0;
	} else if (y <= -1.65e-65) {
		tmp = x / t_0;
	} else if (y <= 1.2e+104) {
		tmp = x + y;
	} else {
		tmp = -z;
	}
	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 = 1.0d0 - (y / z)
    if (y <= (-1.08d+139)) then
        tmp = -z
    else if (y <= (-1.15d-14)) then
        tmp = y / t_0
    else if (y <= (-1.65d-65)) then
        tmp = x / t_0
    else if (y <= 1.2d+104) then
        tmp = x + y
    else
        tmp = -z
    end if
    code = tmp
end function
public static double code(double x, double y, double z) {
	double t_0 = 1.0 - (y / z);
	double tmp;
	if (y <= -1.08e+139) {
		tmp = -z;
	} else if (y <= -1.15e-14) {
		tmp = y / t_0;
	} else if (y <= -1.65e-65) {
		tmp = x / t_0;
	} else if (y <= 1.2e+104) {
		tmp = x + y;
	} else {
		tmp = -z;
	}
	return tmp;
}
def code(x, y, z):
	t_0 = 1.0 - (y / z)
	tmp = 0
	if y <= -1.08e+139:
		tmp = -z
	elif y <= -1.15e-14:
		tmp = y / t_0
	elif y <= -1.65e-65:
		tmp = x / t_0
	elif y <= 1.2e+104:
		tmp = x + y
	else:
		tmp = -z
	return tmp
function code(x, y, z)
	t_0 = Float64(1.0 - Float64(y / z))
	tmp = 0.0
	if (y <= -1.08e+139)
		tmp = Float64(-z);
	elseif (y <= -1.15e-14)
		tmp = Float64(y / t_0);
	elseif (y <= -1.65e-65)
		tmp = Float64(x / t_0);
	elseif (y <= 1.2e+104)
		tmp = Float64(x + y);
	else
		tmp = Float64(-z);
	end
	return tmp
end
function tmp_2 = code(x, y, z)
	t_0 = 1.0 - (y / z);
	tmp = 0.0;
	if (y <= -1.08e+139)
		tmp = -z;
	elseif (y <= -1.15e-14)
		tmp = y / t_0;
	elseif (y <= -1.65e-65)
		tmp = x / t_0;
	elseif (y <= 1.2e+104)
		tmp = x + y;
	else
		tmp = -z;
	end
	tmp_2 = tmp;
end
code[x_, y_, z_] := Block[{t$95$0 = N[(1.0 - N[(y / z), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[y, -1.08e+139], (-z), If[LessEqual[y, -1.15e-14], N[(y / t$95$0), $MachinePrecision], If[LessEqual[y, -1.65e-65], N[(x / t$95$0), $MachinePrecision], If[LessEqual[y, 1.2e+104], N[(x + y), $MachinePrecision], (-z)]]]]]
\begin{array}{l}

\\
\begin{array}{l}
t_0 := 1 - \frac{y}{z}\\
\mathbf{if}\;y \leq -1.08 \cdot 10^{+139}:\\
\;\;\;\;-z\\

\mathbf{elif}\;y \leq -1.15 \cdot 10^{-14}:\\
\;\;\;\;\frac{y}{t_0}\\

\mathbf{elif}\;y \leq -1.65 \cdot 10^{-65}:\\
\;\;\;\;\frac{x}{t_0}\\

\mathbf{elif}\;y \leq 1.2 \cdot 10^{+104}:\\
\;\;\;\;x + y\\

\mathbf{else}:\\
\;\;\;\;-z\\


\end{array}
\end{array}
Derivation
  1. Split input into 4 regimes
  2. if y < -1.08000000000000004e139 or 1.2e104 < y

    1. Initial program 67.3%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around inf 79.1%

      \[\leadsto \color{blue}{-1 \cdot z} \]
    3. Step-by-step derivation
      1. mul-1-neg79.1%

        \[\leadsto \color{blue}{-z} \]
    4. Simplified79.1%

      \[\leadsto \color{blue}{-z} \]

    if -1.08000000000000004e139 < y < -1.14999999999999999e-14

    1. Initial program 86.0%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in x around 0 61.0%

      \[\leadsto \color{blue}{\frac{y}{1 - \frac{y}{z}}} \]

    if -1.14999999999999999e-14 < y < -1.6500000000000001e-65

    1. Initial program 99.6%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in x around inf 77.1%

      \[\leadsto \color{blue}{\frac{x}{1 - \frac{y}{z}}} \]

    if -1.6500000000000001e-65 < y < 1.2e104

    1. Initial program 98.6%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in z around inf 74.2%

      \[\leadsto \color{blue}{x + y} \]
    3. Step-by-step derivation
      1. +-commutative74.2%

        \[\leadsto \color{blue}{y + x} \]
    4. Simplified74.2%

      \[\leadsto \color{blue}{y + x} \]
  3. Recombined 4 regimes into one program.
  4. Final simplification74.0%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -1.08 \cdot 10^{+139}:\\ \;\;\;\;-z\\ \mathbf{elif}\;y \leq -1.15 \cdot 10^{-14}:\\ \;\;\;\;\frac{y}{1 - \frac{y}{z}}\\ \mathbf{elif}\;y \leq -1.65 \cdot 10^{-65}:\\ \;\;\;\;\frac{x}{1 - \frac{y}{z}}\\ \mathbf{elif}\;y \leq 1.2 \cdot 10^{+104}:\\ \;\;\;\;x + y\\ \mathbf{else}:\\ \;\;\;\;-z\\ \end{array} \]

Alternative 4: 56.1% accurate, 0.7× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -6.5 \cdot 10^{-32}:\\ \;\;\;\;-z\\ \mathbf{elif}\;y \leq -8 \cdot 10^{-137}:\\ \;\;\;\;y\\ \mathbf{elif}\;y \leq 2.05 \cdot 10^{-103}:\\ \;\;\;\;x\\ \mathbf{elif}\;y \leq 4 \cdot 10^{-19}:\\ \;\;\;\;y\\ \mathbf{elif}\;y \leq 2.1 \cdot 10^{+44}:\\ \;\;\;\;x\\ \mathbf{else}:\\ \;\;\;\;-z\\ \end{array} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (if (<= y -6.5e-32)
   (- z)
   (if (<= y -8e-137)
     y
     (if (<= y 2.05e-103) x (if (<= y 4e-19) y (if (<= y 2.1e+44) x (- z)))))))
double code(double x, double y, double z) {
	double tmp;
	if (y <= -6.5e-32) {
		tmp = -z;
	} else if (y <= -8e-137) {
		tmp = y;
	} else if (y <= 2.05e-103) {
		tmp = x;
	} else if (y <= 4e-19) {
		tmp = y;
	} else if (y <= 2.1e+44) {
		tmp = x;
	} else {
		tmp = -z;
	}
	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) :: tmp
    if (y <= (-6.5d-32)) then
        tmp = -z
    else if (y <= (-8d-137)) then
        tmp = y
    else if (y <= 2.05d-103) then
        tmp = x
    else if (y <= 4d-19) then
        tmp = y
    else if (y <= 2.1d+44) then
        tmp = x
    else
        tmp = -z
    end if
    code = tmp
end function
public static double code(double x, double y, double z) {
	double tmp;
	if (y <= -6.5e-32) {
		tmp = -z;
	} else if (y <= -8e-137) {
		tmp = y;
	} else if (y <= 2.05e-103) {
		tmp = x;
	} else if (y <= 4e-19) {
		tmp = y;
	} else if (y <= 2.1e+44) {
		tmp = x;
	} else {
		tmp = -z;
	}
	return tmp;
}
def code(x, y, z):
	tmp = 0
	if y <= -6.5e-32:
		tmp = -z
	elif y <= -8e-137:
		tmp = y
	elif y <= 2.05e-103:
		tmp = x
	elif y <= 4e-19:
		tmp = y
	elif y <= 2.1e+44:
		tmp = x
	else:
		tmp = -z
	return tmp
function code(x, y, z)
	tmp = 0.0
	if (y <= -6.5e-32)
		tmp = Float64(-z);
	elseif (y <= -8e-137)
		tmp = y;
	elseif (y <= 2.05e-103)
		tmp = x;
	elseif (y <= 4e-19)
		tmp = y;
	elseif (y <= 2.1e+44)
		tmp = x;
	else
		tmp = Float64(-z);
	end
	return tmp
end
function tmp_2 = code(x, y, z)
	tmp = 0.0;
	if (y <= -6.5e-32)
		tmp = -z;
	elseif (y <= -8e-137)
		tmp = y;
	elseif (y <= 2.05e-103)
		tmp = x;
	elseif (y <= 4e-19)
		tmp = y;
	elseif (y <= 2.1e+44)
		tmp = x;
	else
		tmp = -z;
	end
	tmp_2 = tmp;
end
code[x_, y_, z_] := If[LessEqual[y, -6.5e-32], (-z), If[LessEqual[y, -8e-137], y, If[LessEqual[y, 2.05e-103], x, If[LessEqual[y, 4e-19], y, If[LessEqual[y, 2.1e+44], x, (-z)]]]]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -6.5 \cdot 10^{-32}:\\
\;\;\;\;-z\\

\mathbf{elif}\;y \leq -8 \cdot 10^{-137}:\\
\;\;\;\;y\\

\mathbf{elif}\;y \leq 2.05 \cdot 10^{-103}:\\
\;\;\;\;x\\

\mathbf{elif}\;y \leq 4 \cdot 10^{-19}:\\
\;\;\;\;y\\

\mathbf{elif}\;y \leq 2.1 \cdot 10^{+44}:\\
\;\;\;\;x\\

\mathbf{else}:\\
\;\;\;\;-z\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if y < -6.49999999999999988e-32 or 2.09999999999999987e44 < y

    1. Initial program 75.2%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around inf 63.9%

      \[\leadsto \color{blue}{-1 \cdot z} \]
    3. Step-by-step derivation
      1. mul-1-neg63.9%

        \[\leadsto \color{blue}{-z} \]
    4. Simplified63.9%

      \[\leadsto \color{blue}{-z} \]

    if -6.49999999999999988e-32 < y < -7.99999999999999982e-137 or 2.04999999999999998e-103 < y < 3.9999999999999999e-19

    1. Initial program 99.9%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in x around 0 60.5%

      \[\leadsto \color{blue}{\frac{y}{1 - \frac{y}{z}}} \]
    3. Taylor expanded in y around 0 45.3%

      \[\leadsto \color{blue}{y} \]

    if -7.99999999999999982e-137 < y < 2.04999999999999998e-103 or 3.9999999999999999e-19 < y < 2.09999999999999987e44

    1. Initial program 99.9%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around 0 63.9%

      \[\leadsto \color{blue}{x} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification61.3%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -6.5 \cdot 10^{-32}:\\ \;\;\;\;-z\\ \mathbf{elif}\;y \leq -8 \cdot 10^{-137}:\\ \;\;\;\;y\\ \mathbf{elif}\;y \leq 2.05 \cdot 10^{-103}:\\ \;\;\;\;x\\ \mathbf{elif}\;y \leq 4 \cdot 10^{-19}:\\ \;\;\;\;y\\ \mathbf{elif}\;y \leq 2.1 \cdot 10^{+44}:\\ \;\;\;\;x\\ \mathbf{else}:\\ \;\;\;\;-z\\ \end{array} \]

Alternative 5: 74.4% accurate, 0.7× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -1.2 \cdot 10^{-42} \lor \neg \left(y \leq 1.9 \cdot 10^{+49}\right):\\ \;\;\;\;z \cdot \frac{\left(-x\right) - y}{y}\\ \mathbf{else}:\\ \;\;\;\;x + y\\ \end{array} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (if (or (<= y -1.2e-42) (not (<= y 1.9e+49)))
   (* z (/ (- (- x) y) y))
   (+ x y)))
double code(double x, double y, double z) {
	double tmp;
	if ((y <= -1.2e-42) || !(y <= 1.9e+49)) {
		tmp = z * ((-x - y) / y);
	} else {
		tmp = x + y;
	}
	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) :: tmp
    if ((y <= (-1.2d-42)) .or. (.not. (y <= 1.9d+49))) then
        tmp = z * ((-x - y) / y)
    else
        tmp = x + y
    end if
    code = tmp
end function
public static double code(double x, double y, double z) {
	double tmp;
	if ((y <= -1.2e-42) || !(y <= 1.9e+49)) {
		tmp = z * ((-x - y) / y);
	} else {
		tmp = x + y;
	}
	return tmp;
}
def code(x, y, z):
	tmp = 0
	if (y <= -1.2e-42) or not (y <= 1.9e+49):
		tmp = z * ((-x - y) / y)
	else:
		tmp = x + y
	return tmp
function code(x, y, z)
	tmp = 0.0
	if ((y <= -1.2e-42) || !(y <= 1.9e+49))
		tmp = Float64(z * Float64(Float64(Float64(-x) - y) / y));
	else
		tmp = Float64(x + y);
	end
	return tmp
end
function tmp_2 = code(x, y, z)
	tmp = 0.0;
	if ((y <= -1.2e-42) || ~((y <= 1.9e+49)))
		tmp = z * ((-x - y) / y);
	else
		tmp = x + y;
	end
	tmp_2 = tmp;
end
code[x_, y_, z_] := If[Or[LessEqual[y, -1.2e-42], N[Not[LessEqual[y, 1.9e+49]], $MachinePrecision]], N[(z * N[(N[((-x) - y), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision], N[(x + y), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -1.2 \cdot 10^{-42} \lor \neg \left(y \leq 1.9 \cdot 10^{+49}\right):\\
\;\;\;\;z \cdot \frac{\left(-x\right) - y}{y}\\

\mathbf{else}:\\
\;\;\;\;x + y\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -1.20000000000000001e-42 or 1.8999999999999999e49 < y

    1. Initial program 75.6%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around inf 57.8%

      \[\leadsto \frac{x + y}{\color{blue}{-1 \cdot \frac{y}{z}}} \]
    3. Step-by-step derivation
      1. neg-mul-157.8%

        \[\leadsto \frac{x + y}{\color{blue}{-\frac{y}{z}}} \]
      2. distribute-neg-frac57.8%

        \[\leadsto \frac{x + y}{\color{blue}{\frac{-y}{z}}} \]
    4. Simplified57.8%

      \[\leadsto \frac{x + y}{\color{blue}{\frac{-y}{z}}} \]
    5. Step-by-step derivation
      1. frac-2neg57.8%

        \[\leadsto \frac{x + y}{\color{blue}{\frac{-\left(-y\right)}{-z}}} \]
      2. remove-double-neg57.8%

        \[\leadsto \frac{x + y}{\frac{\color{blue}{y}}{-z}} \]
      3. associate-/r/81.3%

        \[\leadsto \color{blue}{\frac{x + y}{y} \cdot \left(-z\right)} \]
      4. +-commutative81.3%

        \[\leadsto \frac{\color{blue}{y + x}}{y} \cdot \left(-z\right) \]
    6. Applied egg-rr81.3%

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

    if -1.20000000000000001e-42 < y < 1.8999999999999999e49

    1. Initial program 99.9%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in z around inf 76.8%

      \[\leadsto \color{blue}{x + y} \]
    3. Step-by-step derivation
      1. +-commutative76.8%

        \[\leadsto \color{blue}{y + x} \]
    4. Simplified76.8%

      \[\leadsto \color{blue}{y + x} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification79.0%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -1.2 \cdot 10^{-42} \lor \neg \left(y \leq 1.9 \cdot 10^{+49}\right):\\ \;\;\;\;z \cdot \frac{\left(-x\right) - y}{y}\\ \mathbf{else}:\\ \;\;\;\;x + y\\ \end{array} \]

Alternative 6: 73.4% accurate, 0.7× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -1.65 \cdot 10^{-39}:\\ \;\;\;\;z \cdot \frac{\left(-x\right) - y}{y}\\ \mathbf{elif}\;y \leq 1.9 \cdot 10^{+44}:\\ \;\;\;\;x + y\\ \mathbf{else}:\\ \;\;\;\;\left(-z\right) - \frac{x}{\frac{y}{z}}\\ \end{array} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (if (<= y -1.65e-39)
   (* z (/ (- (- x) y) y))
   (if (<= y 1.9e+44) (+ x y) (- (- z) (/ x (/ y z))))))
double code(double x, double y, double z) {
	double tmp;
	if (y <= -1.65e-39) {
		tmp = z * ((-x - y) / y);
	} else if (y <= 1.9e+44) {
		tmp = x + y;
	} else {
		tmp = -z - (x / (y / z));
	}
	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) :: tmp
    if (y <= (-1.65d-39)) then
        tmp = z * ((-x - y) / y)
    else if (y <= 1.9d+44) then
        tmp = x + y
    else
        tmp = -z - (x / (y / z))
    end if
    code = tmp
end function
public static double code(double x, double y, double z) {
	double tmp;
	if (y <= -1.65e-39) {
		tmp = z * ((-x - y) / y);
	} else if (y <= 1.9e+44) {
		tmp = x + y;
	} else {
		tmp = -z - (x / (y / z));
	}
	return tmp;
}
def code(x, y, z):
	tmp = 0
	if y <= -1.65e-39:
		tmp = z * ((-x - y) / y)
	elif y <= 1.9e+44:
		tmp = x + y
	else:
		tmp = -z - (x / (y / z))
	return tmp
function code(x, y, z)
	tmp = 0.0
	if (y <= -1.65e-39)
		tmp = Float64(z * Float64(Float64(Float64(-x) - y) / y));
	elseif (y <= 1.9e+44)
		tmp = Float64(x + y);
	else
		tmp = Float64(Float64(-z) - Float64(x / Float64(y / z)));
	end
	return tmp
end
function tmp_2 = code(x, y, z)
	tmp = 0.0;
	if (y <= -1.65e-39)
		tmp = z * ((-x - y) / y);
	elseif (y <= 1.9e+44)
		tmp = x + y;
	else
		tmp = -z - (x / (y / z));
	end
	tmp_2 = tmp;
end
code[x_, y_, z_] := If[LessEqual[y, -1.65e-39], N[(z * N[(N[((-x) - y), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision], If[LessEqual[y, 1.9e+44], N[(x + y), $MachinePrecision], N[((-z) - N[(x / N[(y / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -1.65 \cdot 10^{-39}:\\
\;\;\;\;z \cdot \frac{\left(-x\right) - y}{y}\\

\mathbf{elif}\;y \leq 1.9 \cdot 10^{+44}:\\
\;\;\;\;x + y\\

\mathbf{else}:\\
\;\;\;\;\left(-z\right) - \frac{x}{\frac{y}{z}}\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if y < -1.64999999999999992e-39

    1. Initial program 78.1%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around inf 63.1%

      \[\leadsto \frac{x + y}{\color{blue}{-1 \cdot \frac{y}{z}}} \]
    3. Step-by-step derivation
      1. neg-mul-163.1%

        \[\leadsto \frac{x + y}{\color{blue}{-\frac{y}{z}}} \]
      2. distribute-neg-frac63.1%

        \[\leadsto \frac{x + y}{\color{blue}{\frac{-y}{z}}} \]
    4. Simplified63.1%

      \[\leadsto \frac{x + y}{\color{blue}{\frac{-y}{z}}} \]
    5. Step-by-step derivation
      1. frac-2neg63.1%

        \[\leadsto \frac{x + y}{\color{blue}{\frac{-\left(-y\right)}{-z}}} \]
      2. remove-double-neg63.1%

        \[\leadsto \frac{x + y}{\frac{\color{blue}{y}}{-z}} \]
      3. associate-/r/83.8%

        \[\leadsto \color{blue}{\frac{x + y}{y} \cdot \left(-z\right)} \]
      4. +-commutative83.8%

        \[\leadsto \frac{\color{blue}{y + x}}{y} \cdot \left(-z\right) \]
    6. Applied egg-rr83.8%

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

    if -1.64999999999999992e-39 < y < 1.9000000000000001e44

    1. Initial program 99.9%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in z around inf 76.8%

      \[\leadsto \color{blue}{x + y} \]
    3. Step-by-step derivation
      1. +-commutative76.8%

        \[\leadsto \color{blue}{y + x} \]
    4. Simplified76.8%

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

    if 1.9000000000000001e44 < y

    1. Initial program 71.8%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around inf 49.4%

      \[\leadsto \frac{x + y}{\color{blue}{-1 \cdot \frac{y}{z}}} \]
    3. Step-by-step derivation
      1. neg-mul-149.4%

        \[\leadsto \frac{x + y}{\color{blue}{-\frac{y}{z}}} \]
      2. distribute-neg-frac49.4%

        \[\leadsto \frac{x + y}{\color{blue}{\frac{-y}{z}}} \]
    4. Simplified49.4%

      \[\leadsto \frac{x + y}{\color{blue}{\frac{-y}{z}}} \]
    5. Taylor expanded in x around 0 77.0%

      \[\leadsto \color{blue}{-1 \cdot z + -1 \cdot \frac{x \cdot z}{y}} \]
    6. Step-by-step derivation
      1. mul-1-neg77.0%

        \[\leadsto -1 \cdot z + \color{blue}{\left(-\frac{x \cdot z}{y}\right)} \]
      2. unsub-neg77.0%

        \[\leadsto \color{blue}{-1 \cdot z - \frac{x \cdot z}{y}} \]
      3. neg-mul-177.0%

        \[\leadsto \color{blue}{\left(-z\right)} - \frac{x \cdot z}{y} \]
      4. associate-/l*77.5%

        \[\leadsto \left(-z\right) - \color{blue}{\frac{x}{\frac{y}{z}}} \]
    7. Simplified77.5%

      \[\leadsto \color{blue}{\left(-z\right) - \frac{x}{\frac{y}{z}}} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification79.1%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -1.65 \cdot 10^{-39}:\\ \;\;\;\;z \cdot \frac{\left(-x\right) - y}{y}\\ \mathbf{elif}\;y \leq 1.9 \cdot 10^{+44}:\\ \;\;\;\;x + y\\ \mathbf{else}:\\ \;\;\;\;\left(-z\right) - \frac{x}{\frac{y}{z}}\\ \end{array} \]

Alternative 7: 73.4% accurate, 0.7× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -3.7 \cdot 10^{-41}:\\ \;\;\;\;\frac{-z}{\frac{y}{x + y}}\\ \mathbf{elif}\;y \leq 2.5 \cdot 10^{+44}:\\ \;\;\;\;x + y\\ \mathbf{else}:\\ \;\;\;\;\left(-z\right) - \frac{x}{\frac{y}{z}}\\ \end{array} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (if (<= y -3.7e-41)
   (/ (- z) (/ y (+ x y)))
   (if (<= y 2.5e+44) (+ x y) (- (- z) (/ x (/ y z))))))
double code(double x, double y, double z) {
	double tmp;
	if (y <= -3.7e-41) {
		tmp = -z / (y / (x + y));
	} else if (y <= 2.5e+44) {
		tmp = x + y;
	} else {
		tmp = -z - (x / (y / z));
	}
	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) :: tmp
    if (y <= (-3.7d-41)) then
        tmp = -z / (y / (x + y))
    else if (y <= 2.5d+44) then
        tmp = x + y
    else
        tmp = -z - (x / (y / z))
    end if
    code = tmp
end function
public static double code(double x, double y, double z) {
	double tmp;
	if (y <= -3.7e-41) {
		tmp = -z / (y / (x + y));
	} else if (y <= 2.5e+44) {
		tmp = x + y;
	} else {
		tmp = -z - (x / (y / z));
	}
	return tmp;
}
def code(x, y, z):
	tmp = 0
	if y <= -3.7e-41:
		tmp = -z / (y / (x + y))
	elif y <= 2.5e+44:
		tmp = x + y
	else:
		tmp = -z - (x / (y / z))
	return tmp
function code(x, y, z)
	tmp = 0.0
	if (y <= -3.7e-41)
		tmp = Float64(Float64(-z) / Float64(y / Float64(x + y)));
	elseif (y <= 2.5e+44)
		tmp = Float64(x + y);
	else
		tmp = Float64(Float64(-z) - Float64(x / Float64(y / z)));
	end
	return tmp
end
function tmp_2 = code(x, y, z)
	tmp = 0.0;
	if (y <= -3.7e-41)
		tmp = -z / (y / (x + y));
	elseif (y <= 2.5e+44)
		tmp = x + y;
	else
		tmp = -z - (x / (y / z));
	end
	tmp_2 = tmp;
end
code[x_, y_, z_] := If[LessEqual[y, -3.7e-41], N[((-z) / N[(y / N[(x + y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], If[LessEqual[y, 2.5e+44], N[(x + y), $MachinePrecision], N[((-z) - N[(x / N[(y / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -3.7 \cdot 10^{-41}:\\
\;\;\;\;\frac{-z}{\frac{y}{x + y}}\\

\mathbf{elif}\;y \leq 2.5 \cdot 10^{+44}:\\
\;\;\;\;x + y\\

\mathbf{else}:\\
\;\;\;\;\left(-z\right) - \frac{x}{\frac{y}{z}}\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if y < -3.7000000000000002e-41

    1. Initial program 78.1%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in z around 0 76.5%

      \[\leadsto \color{blue}{-1 \cdot \frac{z \cdot \left(x + y\right)}{y}} \]
    3. Step-by-step derivation
      1. mul-1-neg76.5%

        \[\leadsto \color{blue}{-\frac{z \cdot \left(x + y\right)}{y}} \]
      2. associate-/l*84.8%

        \[\leadsto -\color{blue}{\frac{z}{\frac{y}{x + y}}} \]
      3. distribute-neg-frac84.8%

        \[\leadsto \color{blue}{\frac{-z}{\frac{y}{x + y}}} \]
      4. +-commutative84.8%

        \[\leadsto \frac{-z}{\frac{y}{\color{blue}{y + x}}} \]
    4. Simplified84.8%

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

    if -3.7000000000000002e-41 < y < 2.4999999999999998e44

    1. Initial program 99.9%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in z around inf 76.8%

      \[\leadsto \color{blue}{x + y} \]
    3. Step-by-step derivation
      1. +-commutative76.8%

        \[\leadsto \color{blue}{y + x} \]
    4. Simplified76.8%

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

    if 2.4999999999999998e44 < y

    1. Initial program 71.8%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around inf 49.4%

      \[\leadsto \frac{x + y}{\color{blue}{-1 \cdot \frac{y}{z}}} \]
    3. Step-by-step derivation
      1. neg-mul-149.4%

        \[\leadsto \frac{x + y}{\color{blue}{-\frac{y}{z}}} \]
      2. distribute-neg-frac49.4%

        \[\leadsto \frac{x + y}{\color{blue}{\frac{-y}{z}}} \]
    4. Simplified49.4%

      \[\leadsto \frac{x + y}{\color{blue}{\frac{-y}{z}}} \]
    5. Taylor expanded in x around 0 77.0%

      \[\leadsto \color{blue}{-1 \cdot z + -1 \cdot \frac{x \cdot z}{y}} \]
    6. Step-by-step derivation
      1. mul-1-neg77.0%

        \[\leadsto -1 \cdot z + \color{blue}{\left(-\frac{x \cdot z}{y}\right)} \]
      2. unsub-neg77.0%

        \[\leadsto \color{blue}{-1 \cdot z - \frac{x \cdot z}{y}} \]
      3. neg-mul-177.0%

        \[\leadsto \color{blue}{\left(-z\right)} - \frac{x \cdot z}{y} \]
      4. associate-/l*77.5%

        \[\leadsto \left(-z\right) - \color{blue}{\frac{x}{\frac{y}{z}}} \]
    7. Simplified77.5%

      \[\leadsto \color{blue}{\left(-z\right) - \frac{x}{\frac{y}{z}}} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification79.3%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -3.7 \cdot 10^{-41}:\\ \;\;\;\;\frac{-z}{\frac{y}{x + y}}\\ \mathbf{elif}\;y \leq 2.5 \cdot 10^{+44}:\\ \;\;\;\;x + y\\ \mathbf{else}:\\ \;\;\;\;\left(-z\right) - \frac{x}{\frac{y}{z}}\\ \end{array} \]

Alternative 8: 67.6% accurate, 0.8× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -1.6 \cdot 10^{-15}:\\ \;\;\;\;-z\\ \mathbf{elif}\;y \leq -1 \cdot 10^{-68}:\\ \;\;\;\;\frac{x}{1 - \frac{y}{z}}\\ \mathbf{elif}\;y \leq 1.2 \cdot 10^{+104}:\\ \;\;\;\;x + y\\ \mathbf{else}:\\ \;\;\;\;-z\\ \end{array} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (if (<= y -1.6e-15)
   (- z)
   (if (<= y -1e-68)
     (/ x (- 1.0 (/ y z)))
     (if (<= y 1.2e+104) (+ x y) (- z)))))
double code(double x, double y, double z) {
	double tmp;
	if (y <= -1.6e-15) {
		tmp = -z;
	} else if (y <= -1e-68) {
		tmp = x / (1.0 - (y / z));
	} else if (y <= 1.2e+104) {
		tmp = x + y;
	} else {
		tmp = -z;
	}
	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) :: tmp
    if (y <= (-1.6d-15)) then
        tmp = -z
    else if (y <= (-1d-68)) then
        tmp = x / (1.0d0 - (y / z))
    else if (y <= 1.2d+104) then
        tmp = x + y
    else
        tmp = -z
    end if
    code = tmp
end function
public static double code(double x, double y, double z) {
	double tmp;
	if (y <= -1.6e-15) {
		tmp = -z;
	} else if (y <= -1e-68) {
		tmp = x / (1.0 - (y / z));
	} else if (y <= 1.2e+104) {
		tmp = x + y;
	} else {
		tmp = -z;
	}
	return tmp;
}
def code(x, y, z):
	tmp = 0
	if y <= -1.6e-15:
		tmp = -z
	elif y <= -1e-68:
		tmp = x / (1.0 - (y / z))
	elif y <= 1.2e+104:
		tmp = x + y
	else:
		tmp = -z
	return tmp
function code(x, y, z)
	tmp = 0.0
	if (y <= -1.6e-15)
		tmp = Float64(-z);
	elseif (y <= -1e-68)
		tmp = Float64(x / Float64(1.0 - Float64(y / z)));
	elseif (y <= 1.2e+104)
		tmp = Float64(x + y);
	else
		tmp = Float64(-z);
	end
	return tmp
end
function tmp_2 = code(x, y, z)
	tmp = 0.0;
	if (y <= -1.6e-15)
		tmp = -z;
	elseif (y <= -1e-68)
		tmp = x / (1.0 - (y / z));
	elseif (y <= 1.2e+104)
		tmp = x + y;
	else
		tmp = -z;
	end
	tmp_2 = tmp;
end
code[x_, y_, z_] := If[LessEqual[y, -1.6e-15], (-z), If[LessEqual[y, -1e-68], N[(x / N[(1.0 - N[(y / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], If[LessEqual[y, 1.2e+104], N[(x + y), $MachinePrecision], (-z)]]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -1.6 \cdot 10^{-15}:\\
\;\;\;\;-z\\

\mathbf{elif}\;y \leq -1 \cdot 10^{-68}:\\
\;\;\;\;\frac{x}{1 - \frac{y}{z}}\\

\mathbf{elif}\;y \leq 1.2 \cdot 10^{+104}:\\
\;\;\;\;x + y\\

\mathbf{else}:\\
\;\;\;\;-z\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if y < -1.6e-15 or 1.2e104 < y

    1. Initial program 73.1%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around inf 69.7%

      \[\leadsto \color{blue}{-1 \cdot z} \]
    3. Step-by-step derivation
      1. mul-1-neg69.7%

        \[\leadsto \color{blue}{-z} \]
    4. Simplified69.7%

      \[\leadsto \color{blue}{-z} \]

    if -1.6e-15 < y < -1.00000000000000007e-68

    1. Initial program 99.6%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in x around inf 77.1%

      \[\leadsto \color{blue}{\frac{x}{1 - \frac{y}{z}}} \]

    if -1.00000000000000007e-68 < y < 1.2e104

    1. Initial program 98.6%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in z around inf 74.2%

      \[\leadsto \color{blue}{x + y} \]
    3. Step-by-step derivation
      1. +-commutative74.2%

        \[\leadsto \color{blue}{y + x} \]
    4. Simplified74.2%

      \[\leadsto \color{blue}{y + x} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification72.4%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -1.6 \cdot 10^{-15}:\\ \;\;\;\;-z\\ \mathbf{elif}\;y \leq -1 \cdot 10^{-68}:\\ \;\;\;\;\frac{x}{1 - \frac{y}{z}}\\ \mathbf{elif}\;y \leq 1.2 \cdot 10^{+104}:\\ \;\;\;\;x + y\\ \mathbf{else}:\\ \;\;\;\;-z\\ \end{array} \]

Alternative 9: 66.7% accurate, 0.9× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -4.5 \cdot 10^{-16}:\\ \;\;\;\;-z\\ \mathbf{elif}\;y \leq -1.15 \cdot 10^{-44}:\\ \;\;\;\;\frac{-x}{\frac{y}{z}}\\ \mathbf{elif}\;y \leq 3 \cdot 10^{+104}:\\ \;\;\;\;x + y\\ \mathbf{else}:\\ \;\;\;\;-z\\ \end{array} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (if (<= y -4.5e-16)
   (- z)
   (if (<= y -1.15e-44) (/ (- x) (/ y z)) (if (<= y 3e+104) (+ x y) (- z)))))
double code(double x, double y, double z) {
	double tmp;
	if (y <= -4.5e-16) {
		tmp = -z;
	} else if (y <= -1.15e-44) {
		tmp = -x / (y / z);
	} else if (y <= 3e+104) {
		tmp = x + y;
	} else {
		tmp = -z;
	}
	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) :: tmp
    if (y <= (-4.5d-16)) then
        tmp = -z
    else if (y <= (-1.15d-44)) then
        tmp = -x / (y / z)
    else if (y <= 3d+104) then
        tmp = x + y
    else
        tmp = -z
    end if
    code = tmp
end function
public static double code(double x, double y, double z) {
	double tmp;
	if (y <= -4.5e-16) {
		tmp = -z;
	} else if (y <= -1.15e-44) {
		tmp = -x / (y / z);
	} else if (y <= 3e+104) {
		tmp = x + y;
	} else {
		tmp = -z;
	}
	return tmp;
}
def code(x, y, z):
	tmp = 0
	if y <= -4.5e-16:
		tmp = -z
	elif y <= -1.15e-44:
		tmp = -x / (y / z)
	elif y <= 3e+104:
		tmp = x + y
	else:
		tmp = -z
	return tmp
function code(x, y, z)
	tmp = 0.0
	if (y <= -4.5e-16)
		tmp = Float64(-z);
	elseif (y <= -1.15e-44)
		tmp = Float64(Float64(-x) / Float64(y / z));
	elseif (y <= 3e+104)
		tmp = Float64(x + y);
	else
		tmp = Float64(-z);
	end
	return tmp
end
function tmp_2 = code(x, y, z)
	tmp = 0.0;
	if (y <= -4.5e-16)
		tmp = -z;
	elseif (y <= -1.15e-44)
		tmp = -x / (y / z);
	elseif (y <= 3e+104)
		tmp = x + y;
	else
		tmp = -z;
	end
	tmp_2 = tmp;
end
code[x_, y_, z_] := If[LessEqual[y, -4.5e-16], (-z), If[LessEqual[y, -1.15e-44], N[((-x) / N[(y / z), $MachinePrecision]), $MachinePrecision], If[LessEqual[y, 3e+104], N[(x + y), $MachinePrecision], (-z)]]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -4.5 \cdot 10^{-16}:\\
\;\;\;\;-z\\

\mathbf{elif}\;y \leq -1.15 \cdot 10^{-44}:\\
\;\;\;\;\frac{-x}{\frac{y}{z}}\\

\mathbf{elif}\;y \leq 3 \cdot 10^{+104}:\\
\;\;\;\;x + y\\

\mathbf{else}:\\
\;\;\;\;-z\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if y < -4.5000000000000002e-16 or 2.99999999999999969e104 < y

    1. Initial program 73.1%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around inf 69.7%

      \[\leadsto \color{blue}{-1 \cdot z} \]
    3. Step-by-step derivation
      1. mul-1-neg69.7%

        \[\leadsto \color{blue}{-z} \]
    4. Simplified69.7%

      \[\leadsto \color{blue}{-z} \]

    if -4.5000000000000002e-16 < y < -1.14999999999999999e-44

    1. Initial program 99.5%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around inf 89.0%

      \[\leadsto \frac{x + y}{\color{blue}{-1 \cdot \frac{y}{z}}} \]
    3. Step-by-step derivation
      1. neg-mul-189.0%

        \[\leadsto \frac{x + y}{\color{blue}{-\frac{y}{z}}} \]
      2. distribute-neg-frac89.0%

        \[\leadsto \frac{x + y}{\color{blue}{\frac{-y}{z}}} \]
    4. Simplified89.0%

      \[\leadsto \frac{x + y}{\color{blue}{\frac{-y}{z}}} \]
    5. Taylor expanded in x around inf 72.2%

      \[\leadsto \color{blue}{-1 \cdot \frac{x \cdot z}{y}} \]
    6. Step-by-step derivation
      1. mul-1-neg72.2%

        \[\leadsto \color{blue}{-\frac{x \cdot z}{y}} \]
      2. associate-/l*72.1%

        \[\leadsto -\color{blue}{\frac{x}{\frac{y}{z}}} \]
      3. distribute-neg-frac72.1%

        \[\leadsto \color{blue}{\frac{-x}{\frac{y}{z}}} \]
    7. Simplified72.1%

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

    if -1.14999999999999999e-44 < y < 2.99999999999999969e104

    1. Initial program 98.6%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in z around inf 73.9%

      \[\leadsto \color{blue}{x + y} \]
    3. Step-by-step derivation
      1. +-commutative73.9%

        \[\leadsto \color{blue}{y + x} \]
    4. Simplified73.9%

      \[\leadsto \color{blue}{y + x} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification72.1%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -4.5 \cdot 10^{-16}:\\ \;\;\;\;-z\\ \mathbf{elif}\;y \leq -1.15 \cdot 10^{-44}:\\ \;\;\;\;\frac{-x}{\frac{y}{z}}\\ \mathbf{elif}\;y \leq 3 \cdot 10^{+104}:\\ \;\;\;\;x + y\\ \mathbf{else}:\\ \;\;\;\;-z\\ \end{array} \]

Alternative 10: 66.6% accurate, 0.9× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -1.1 \cdot 10^{-14}:\\ \;\;\;\;-z\\ \mathbf{elif}\;y \leq -1.1 \cdot 10^{-46}:\\ \;\;\;\;\frac{x \cdot \left(-z\right)}{y}\\ \mathbf{elif}\;y \leq 8 \cdot 10^{+104}:\\ \;\;\;\;x + y\\ \mathbf{else}:\\ \;\;\;\;-z\\ \end{array} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (if (<= y -1.1e-14)
   (- z)
   (if (<= y -1.1e-46) (/ (* x (- z)) y) (if (<= y 8e+104) (+ x y) (- z)))))
double code(double x, double y, double z) {
	double tmp;
	if (y <= -1.1e-14) {
		tmp = -z;
	} else if (y <= -1.1e-46) {
		tmp = (x * -z) / y;
	} else if (y <= 8e+104) {
		tmp = x + y;
	} else {
		tmp = -z;
	}
	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) :: tmp
    if (y <= (-1.1d-14)) then
        tmp = -z
    else if (y <= (-1.1d-46)) then
        tmp = (x * -z) / y
    else if (y <= 8d+104) then
        tmp = x + y
    else
        tmp = -z
    end if
    code = tmp
end function
public static double code(double x, double y, double z) {
	double tmp;
	if (y <= -1.1e-14) {
		tmp = -z;
	} else if (y <= -1.1e-46) {
		tmp = (x * -z) / y;
	} else if (y <= 8e+104) {
		tmp = x + y;
	} else {
		tmp = -z;
	}
	return tmp;
}
def code(x, y, z):
	tmp = 0
	if y <= -1.1e-14:
		tmp = -z
	elif y <= -1.1e-46:
		tmp = (x * -z) / y
	elif y <= 8e+104:
		tmp = x + y
	else:
		tmp = -z
	return tmp
function code(x, y, z)
	tmp = 0.0
	if (y <= -1.1e-14)
		tmp = Float64(-z);
	elseif (y <= -1.1e-46)
		tmp = Float64(Float64(x * Float64(-z)) / y);
	elseif (y <= 8e+104)
		tmp = Float64(x + y);
	else
		tmp = Float64(-z);
	end
	return tmp
end
function tmp_2 = code(x, y, z)
	tmp = 0.0;
	if (y <= -1.1e-14)
		tmp = -z;
	elseif (y <= -1.1e-46)
		tmp = (x * -z) / y;
	elseif (y <= 8e+104)
		tmp = x + y;
	else
		tmp = -z;
	end
	tmp_2 = tmp;
end
code[x_, y_, z_] := If[LessEqual[y, -1.1e-14], (-z), If[LessEqual[y, -1.1e-46], N[(N[(x * (-z)), $MachinePrecision] / y), $MachinePrecision], If[LessEqual[y, 8e+104], N[(x + y), $MachinePrecision], (-z)]]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -1.1 \cdot 10^{-14}:\\
\;\;\;\;-z\\

\mathbf{elif}\;y \leq -1.1 \cdot 10^{-46}:\\
\;\;\;\;\frac{x \cdot \left(-z\right)}{y}\\

\mathbf{elif}\;y \leq 8 \cdot 10^{+104}:\\
\;\;\;\;x + y\\

\mathbf{else}:\\
\;\;\;\;-z\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if y < -1.1e-14 or 8e104 < y

    1. Initial program 73.1%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around inf 69.7%

      \[\leadsto \color{blue}{-1 \cdot z} \]
    3. Step-by-step derivation
      1. mul-1-neg69.7%

        \[\leadsto \color{blue}{-z} \]
    4. Simplified69.7%

      \[\leadsto \color{blue}{-z} \]

    if -1.1e-14 < y < -1.1e-46

    1. Initial program 99.5%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around inf 89.0%

      \[\leadsto \frac{x + y}{\color{blue}{-1 \cdot \frac{y}{z}}} \]
    3. Step-by-step derivation
      1. neg-mul-189.0%

        \[\leadsto \frac{x + y}{\color{blue}{-\frac{y}{z}}} \]
      2. distribute-neg-frac89.0%

        \[\leadsto \frac{x + y}{\color{blue}{\frac{-y}{z}}} \]
    4. Simplified89.0%

      \[\leadsto \frac{x + y}{\color{blue}{\frac{-y}{z}}} \]
    5. Taylor expanded in x around inf 72.2%

      \[\leadsto \color{blue}{-1 \cdot \frac{x \cdot z}{y}} \]
    6. Step-by-step derivation
      1. associate-*r/72.2%

        \[\leadsto \color{blue}{\frac{-1 \cdot \left(x \cdot z\right)}{y}} \]
      2. associate-*r*72.2%

        \[\leadsto \frac{\color{blue}{\left(-1 \cdot x\right) \cdot z}}{y} \]
      3. neg-mul-172.2%

        \[\leadsto \frac{\color{blue}{\left(-x\right)} \cdot z}{y} \]
    7. Simplified72.2%

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

    if -1.1e-46 < y < 8e104

    1. Initial program 98.6%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in z around inf 73.9%

      \[\leadsto \color{blue}{x + y} \]
    3. Step-by-step derivation
      1. +-commutative73.9%

        \[\leadsto \color{blue}{y + x} \]
    4. Simplified73.9%

      \[\leadsto \color{blue}{y + x} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification72.1%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -1.1 \cdot 10^{-14}:\\ \;\;\;\;-z\\ \mathbf{elif}\;y \leq -1.1 \cdot 10^{-46}:\\ \;\;\;\;\frac{x \cdot \left(-z\right)}{y}\\ \mathbf{elif}\;y \leq 8 \cdot 10^{+104}:\\ \;\;\;\;x + y\\ \mathbf{else}:\\ \;\;\;\;-z\\ \end{array} \]

Alternative 11: 67.2% accurate, 1.3× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -3.6 \cdot 10^{-25} \lor \neg \left(y \leq 1.3 \cdot 10^{+104}\right):\\ \;\;\;\;-z\\ \mathbf{else}:\\ \;\;\;\;x + y\\ \end{array} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (if (or (<= y -3.6e-25) (not (<= y 1.3e+104))) (- z) (+ x y)))
double code(double x, double y, double z) {
	double tmp;
	if ((y <= -3.6e-25) || !(y <= 1.3e+104)) {
		tmp = -z;
	} else {
		tmp = x + y;
	}
	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) :: tmp
    if ((y <= (-3.6d-25)) .or. (.not. (y <= 1.3d+104))) then
        tmp = -z
    else
        tmp = x + y
    end if
    code = tmp
end function
public static double code(double x, double y, double z) {
	double tmp;
	if ((y <= -3.6e-25) || !(y <= 1.3e+104)) {
		tmp = -z;
	} else {
		tmp = x + y;
	}
	return tmp;
}
def code(x, y, z):
	tmp = 0
	if (y <= -3.6e-25) or not (y <= 1.3e+104):
		tmp = -z
	else:
		tmp = x + y
	return tmp
function code(x, y, z)
	tmp = 0.0
	if ((y <= -3.6e-25) || !(y <= 1.3e+104))
		tmp = Float64(-z);
	else
		tmp = Float64(x + y);
	end
	return tmp
end
function tmp_2 = code(x, y, z)
	tmp = 0.0;
	if ((y <= -3.6e-25) || ~((y <= 1.3e+104)))
		tmp = -z;
	else
		tmp = x + y;
	end
	tmp_2 = tmp;
end
code[x_, y_, z_] := If[Or[LessEqual[y, -3.6e-25], N[Not[LessEqual[y, 1.3e+104]], $MachinePrecision]], (-z), N[(x + y), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -3.6 \cdot 10^{-25} \lor \neg \left(y \leq 1.3 \cdot 10^{+104}\right):\\
\;\;\;\;-z\\

\mathbf{else}:\\
\;\;\;\;x + y\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -3.5999999999999999e-25 or 1.3e104 < y

    1. Initial program 74.3%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around inf 67.7%

      \[\leadsto \color{blue}{-1 \cdot z} \]
    3. Step-by-step derivation
      1. mul-1-neg67.7%

        \[\leadsto \color{blue}{-z} \]
    4. Simplified67.7%

      \[\leadsto \color{blue}{-z} \]

    if -3.5999999999999999e-25 < y < 1.3e104

    1. Initial program 98.6%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in z around inf 72.6%

      \[\leadsto \color{blue}{x + y} \]
    3. Step-by-step derivation
      1. +-commutative72.6%

        \[\leadsto \color{blue}{y + x} \]
    4. Simplified72.6%

      \[\leadsto \color{blue}{y + x} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification70.4%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -3.6 \cdot 10^{-25} \lor \neg \left(y \leq 1.3 \cdot 10^{+104}\right):\\ \;\;\;\;-z\\ \mathbf{else}:\\ \;\;\;\;x + y\\ \end{array} \]

Alternative 12: 41.5% accurate, 1.8× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;x \leq -2.05 \cdot 10^{-162}:\\ \;\;\;\;x\\ \mathbf{elif}\;x \leq 4.3 \cdot 10^{-117}:\\ \;\;\;\;y\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (if (<= x -2.05e-162) x (if (<= x 4.3e-117) y x)))
double code(double x, double y, double z) {
	double tmp;
	if (x <= -2.05e-162) {
		tmp = x;
	} else if (x <= 4.3e-117) {
		tmp = y;
	} else {
		tmp = x;
	}
	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) :: tmp
    if (x <= (-2.05d-162)) then
        tmp = x
    else if (x <= 4.3d-117) then
        tmp = y
    else
        tmp = x
    end if
    code = tmp
end function
public static double code(double x, double y, double z) {
	double tmp;
	if (x <= -2.05e-162) {
		tmp = x;
	} else if (x <= 4.3e-117) {
		tmp = y;
	} else {
		tmp = x;
	}
	return tmp;
}
def code(x, y, z):
	tmp = 0
	if x <= -2.05e-162:
		tmp = x
	elif x <= 4.3e-117:
		tmp = y
	else:
		tmp = x
	return tmp
function code(x, y, z)
	tmp = 0.0
	if (x <= -2.05e-162)
		tmp = x;
	elseif (x <= 4.3e-117)
		tmp = y;
	else
		tmp = x;
	end
	return tmp
end
function tmp_2 = code(x, y, z)
	tmp = 0.0;
	if (x <= -2.05e-162)
		tmp = x;
	elseif (x <= 4.3e-117)
		tmp = y;
	else
		tmp = x;
	end
	tmp_2 = tmp;
end
code[x_, y_, z_] := If[LessEqual[x, -2.05e-162], x, If[LessEqual[x, 4.3e-117], y, x]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;x \leq -2.05 \cdot 10^{-162}:\\
\;\;\;\;x\\

\mathbf{elif}\;x \leq 4.3 \cdot 10^{-117}:\\
\;\;\;\;y\\

\mathbf{else}:\\
\;\;\;\;x\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if x < -2.0500000000000001e-162 or 4.3e-117 < x

    1. Initial program 86.4%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in y around 0 36.7%

      \[\leadsto \color{blue}{x} \]

    if -2.0500000000000001e-162 < x < 4.3e-117

    1. Initial program 91.1%

      \[\frac{x + y}{1 - \frac{y}{z}} \]
    2. Taylor expanded in x around 0 80.5%

      \[\leadsto \color{blue}{\frac{y}{1 - \frac{y}{z}}} \]
    3. Taylor expanded in y around 0 47.7%

      \[\leadsto \color{blue}{y} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification39.9%

    \[\leadsto \begin{array}{l} \mathbf{if}\;x \leq -2.05 \cdot 10^{-162}:\\ \;\;\;\;x\\ \mathbf{elif}\;x \leq 4.3 \cdot 10^{-117}:\\ \;\;\;\;y\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \]

Alternative 13: 35.0% accurate, 9.0× speedup?

\[\begin{array}{l} \\ x \end{array} \]
(FPCore (x y z) :precision binary64 x)
double code(double x, double y, double z) {
	return x;
}
real(8) function code(x, y, z)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    code = x
end function
public static double code(double x, double y, double z) {
	return x;
}
def code(x, y, z):
	return x
function code(x, y, z)
	return x
end
function tmp = code(x, y, z)
	tmp = x;
end
code[x_, y_, z_] := x
\begin{array}{l}

\\
x
\end{array}
Derivation
  1. Initial program 87.8%

    \[\frac{x + y}{1 - \frac{y}{z}} \]
  2. Taylor expanded in y around 0 29.1%

    \[\leadsto \color{blue}{x} \]
  3. Final simplification29.1%

    \[\leadsto x \]

Developer target: 94.0% accurate, 0.7× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \frac{y + x}{-y} \cdot z\\ \mathbf{if}\;y < -3.7429310762689856 \cdot 10^{+171}:\\ \;\;\;\;t_0\\ \mathbf{elif}\;y < 3.5534662456086734 \cdot 10^{+168}:\\ \;\;\;\;\frac{x + y}{1 - \frac{y}{z}}\\ \mathbf{else}:\\ \;\;\;\;t_0\\ \end{array} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (let* ((t_0 (* (/ (+ y x) (- y)) z)))
   (if (< y -3.7429310762689856e+171)
     t_0
     (if (< y 3.5534662456086734e+168) (/ (+ x y) (- 1.0 (/ y z))) t_0))))
double code(double x, double y, double z) {
	double t_0 = ((y + x) / -y) * z;
	double tmp;
	if (y < -3.7429310762689856e+171) {
		tmp = t_0;
	} else if (y < 3.5534662456086734e+168) {
		tmp = (x + y) / (1.0 - (y / z));
	} else {
		tmp = t_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 = ((y + x) / -y) * z
    if (y < (-3.7429310762689856d+171)) then
        tmp = t_0
    else if (y < 3.5534662456086734d+168) then
        tmp = (x + y) / (1.0d0 - (y / z))
    else
        tmp = t_0
    end if
    code = tmp
end function
public static double code(double x, double y, double z) {
	double t_0 = ((y + x) / -y) * z;
	double tmp;
	if (y < -3.7429310762689856e+171) {
		tmp = t_0;
	} else if (y < 3.5534662456086734e+168) {
		tmp = (x + y) / (1.0 - (y / z));
	} else {
		tmp = t_0;
	}
	return tmp;
}
def code(x, y, z):
	t_0 = ((y + x) / -y) * z
	tmp = 0
	if y < -3.7429310762689856e+171:
		tmp = t_0
	elif y < 3.5534662456086734e+168:
		tmp = (x + y) / (1.0 - (y / z))
	else:
		tmp = t_0
	return tmp
function code(x, y, z)
	t_0 = Float64(Float64(Float64(y + x) / Float64(-y)) * z)
	tmp = 0.0
	if (y < -3.7429310762689856e+171)
		tmp = t_0;
	elseif (y < 3.5534662456086734e+168)
		tmp = Float64(Float64(x + y) / Float64(1.0 - Float64(y / z)));
	else
		tmp = t_0;
	end
	return tmp
end
function tmp_2 = code(x, y, z)
	t_0 = ((y + x) / -y) * z;
	tmp = 0.0;
	if (y < -3.7429310762689856e+171)
		tmp = t_0;
	elseif (y < 3.5534662456086734e+168)
		tmp = (x + y) / (1.0 - (y / z));
	else
		tmp = t_0;
	end
	tmp_2 = tmp;
end
code[x_, y_, z_] := Block[{t$95$0 = N[(N[(N[(y + x), $MachinePrecision] / (-y)), $MachinePrecision] * z), $MachinePrecision]}, If[Less[y, -3.7429310762689856e+171], t$95$0, If[Less[y, 3.5534662456086734e+168], N[(N[(x + y), $MachinePrecision] / N[(1.0 - N[(y / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], t$95$0]]]
\begin{array}{l}

\\
\begin{array}{l}
t_0 := \frac{y + x}{-y} \cdot z\\
\mathbf{if}\;y < -3.7429310762689856 \cdot 10^{+171}:\\
\;\;\;\;t_0\\

\mathbf{elif}\;y < 3.5534662456086734 \cdot 10^{+168}:\\
\;\;\;\;\frac{x + y}{1 - \frac{y}{z}}\\

\mathbf{else}:\\
\;\;\;\;t_0\\


\end{array}
\end{array}

Reproduce

?
herbie shell --seed 2023308 
(FPCore (x y z)
  :name "Graphics.Rendering.Chart.Backend.Diagrams:calcFontMetrics from Chart-diagrams-1.5.1, A"
  :precision binary64

  :herbie-target
  (if (< y -3.7429310762689856e+171) (* (/ (+ y x) (- y)) z) (if (< y 3.5534662456086734e+168) (/ (+ x y) (- 1.0 (/ y z))) (* (/ (+ y x) (- y)) z)))

  (/ (+ x y) (- 1.0 (/ y z))))