Diagrams.Trail:splitAtParam from diagrams-lib-1.3.0.3, D

Percentage Accurate: 65.2% → 99.9%
Time: 8.1s
Alternatives: 12
Speedup: 1.0×

Specification

?
\[\begin{array}{l} \\ 1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \end{array} \]
(FPCore (x y) :precision binary64 (- 1.0 (/ (* (- 1.0 x) y) (+ y 1.0))))
double code(double x, double y) {
	return 1.0 - (((1.0 - x) * y) / (y + 1.0));
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = 1.0d0 - (((1.0d0 - x) * y) / (y + 1.0d0))
end function
public static double code(double x, double y) {
	return 1.0 - (((1.0 - x) * y) / (y + 1.0));
}
def code(x, y):
	return 1.0 - (((1.0 - x) * y) / (y + 1.0))
function code(x, y)
	return Float64(1.0 - Float64(Float64(Float64(1.0 - x) * y) / Float64(y + 1.0)))
end
function tmp = code(x, y)
	tmp = 1.0 - (((1.0 - x) * y) / (y + 1.0));
end
code[x_, y_] := N[(1.0 - N[(N[(N[(1.0 - x), $MachinePrecision] * y), $MachinePrecision] / N[(y + 1.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
1 - \frac{\left(1 - x\right) \cdot y}{y + 1}
\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 12 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: 65.2% accurate, 1.0× speedup?

\[\begin{array}{l} \\ 1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \end{array} \]
(FPCore (x y) :precision binary64 (- 1.0 (/ (* (- 1.0 x) y) (+ y 1.0))))
double code(double x, double y) {
	return 1.0 - (((1.0 - x) * y) / (y + 1.0));
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = 1.0d0 - (((1.0d0 - x) * y) / (y + 1.0d0))
end function
public static double code(double x, double y) {
	return 1.0 - (((1.0 - x) * y) / (y + 1.0));
}
def code(x, y):
	return 1.0 - (((1.0 - x) * y) / (y + 1.0))
function code(x, y)
	return Float64(1.0 - Float64(Float64(Float64(1.0 - x) * y) / Float64(y + 1.0)))
end
function tmp = code(x, y)
	tmp = 1.0 - (((1.0 - x) * y) / (y + 1.0));
end
code[x_, y_] := N[(1.0 - N[(N[(N[(1.0 - x), $MachinePrecision] * y), $MachinePrecision] / N[(y + 1.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
1 - \frac{\left(1 - x\right) \cdot y}{y + 1}
\end{array}

Alternative 1: 99.9% accurate, 0.4× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \frac{\frac{x + -1}{y} + \left(1 - x\right)}{y}\\ \mathbf{if}\;y \leq -100000:\\ \;\;\;\;x + t\_0\\ \mathbf{elif}\;y \leq 18500:\\ \;\;\;\;1 - \frac{y \cdot \left(x + -1\right)}{-1 - y}\\ \mathbf{else}:\\ \;\;\;\;x + \frac{\left(1 - t\_0\right) - x}{y}\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (let* ((t_0 (/ (+ (/ (+ x -1.0) y) (- 1.0 x)) y)))
   (if (<= y -100000.0)
     (+ x t_0)
     (if (<= y 18500.0)
       (- 1.0 (/ (* y (+ x -1.0)) (- -1.0 y)))
       (+ x (/ (- (- 1.0 t_0) x) y))))))
double code(double x, double y) {
	double t_0 = (((x + -1.0) / y) + (1.0 - x)) / y;
	double tmp;
	if (y <= -100000.0) {
		tmp = x + t_0;
	} else if (y <= 18500.0) {
		tmp = 1.0 - ((y * (x + -1.0)) / (-1.0 - y));
	} else {
		tmp = x + (((1.0 - t_0) - x) / y);
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: t_0
    real(8) :: tmp
    t_0 = (((x + (-1.0d0)) / y) + (1.0d0 - x)) / y
    if (y <= (-100000.0d0)) then
        tmp = x + t_0
    else if (y <= 18500.0d0) then
        tmp = 1.0d0 - ((y * (x + (-1.0d0))) / ((-1.0d0) - y))
    else
        tmp = x + (((1.0d0 - t_0) - x) / y)
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double t_0 = (((x + -1.0) / y) + (1.0 - x)) / y;
	double tmp;
	if (y <= -100000.0) {
		tmp = x + t_0;
	} else if (y <= 18500.0) {
		tmp = 1.0 - ((y * (x + -1.0)) / (-1.0 - y));
	} else {
		tmp = x + (((1.0 - t_0) - x) / y);
	}
	return tmp;
}
def code(x, y):
	t_0 = (((x + -1.0) / y) + (1.0 - x)) / y
	tmp = 0
	if y <= -100000.0:
		tmp = x + t_0
	elif y <= 18500.0:
		tmp = 1.0 - ((y * (x + -1.0)) / (-1.0 - y))
	else:
		tmp = x + (((1.0 - t_0) - x) / y)
	return tmp
function code(x, y)
	t_0 = Float64(Float64(Float64(Float64(x + -1.0) / y) + Float64(1.0 - x)) / y)
	tmp = 0.0
	if (y <= -100000.0)
		tmp = Float64(x + t_0);
	elseif (y <= 18500.0)
		tmp = Float64(1.0 - Float64(Float64(y * Float64(x + -1.0)) / Float64(-1.0 - y)));
	else
		tmp = Float64(x + Float64(Float64(Float64(1.0 - t_0) - x) / y));
	end
	return tmp
end
function tmp_2 = code(x, y)
	t_0 = (((x + -1.0) / y) + (1.0 - x)) / y;
	tmp = 0.0;
	if (y <= -100000.0)
		tmp = x + t_0;
	elseif (y <= 18500.0)
		tmp = 1.0 - ((y * (x + -1.0)) / (-1.0 - y));
	else
		tmp = x + (((1.0 - t_0) - x) / y);
	end
	tmp_2 = tmp;
end
code[x_, y_] := Block[{t$95$0 = N[(N[(N[(N[(x + -1.0), $MachinePrecision] / y), $MachinePrecision] + N[(1.0 - x), $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]}, If[LessEqual[y, -100000.0], N[(x + t$95$0), $MachinePrecision], If[LessEqual[y, 18500.0], N[(1.0 - N[(N[(y * N[(x + -1.0), $MachinePrecision]), $MachinePrecision] / N[(-1.0 - y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(x + N[(N[(N[(1.0 - t$95$0), $MachinePrecision] - x), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision]]]]
\begin{array}{l}

\\
\begin{array}{l}
t_0 := \frac{\frac{x + -1}{y} + \left(1 - x\right)}{y}\\
\mathbf{if}\;y \leq -100000:\\
\;\;\;\;x + t\_0\\

\mathbf{elif}\;y \leq 18500:\\
\;\;\;\;1 - \frac{y \cdot \left(x + -1\right)}{-1 - y}\\

\mathbf{else}:\\
\;\;\;\;x + \frac{\left(1 - t\_0\right) - x}{y}\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if y < -1e5

    1. Initial program 36.0%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*51.6%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative51.6%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified51.6%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around -inf 100.0%

      \[\leadsto \color{blue}{x + -1 \cdot \frac{-1 \cdot \frac{x - 1}{y} - -1 \cdot \left(x - 1\right)}{y}} \]
    6. Step-by-step derivation
      1. mul-1-neg100.0%

        \[\leadsto x + \color{blue}{\left(-\frac{-1 \cdot \frac{x - 1}{y} - -1 \cdot \left(x - 1\right)}{y}\right)} \]
      2. unsub-neg100.0%

        \[\leadsto \color{blue}{x - \frac{-1 \cdot \frac{x - 1}{y} - -1 \cdot \left(x - 1\right)}{y}} \]
    7. Simplified100.0%

      \[\leadsto \color{blue}{x - \frac{\left(x + -1\right) - \frac{x + -1}{y}}{y}} \]

    if -1e5 < y < 18500

    1. Initial program 100.0%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Add Preprocessing

    if 18500 < y

    1. Initial program 32.6%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*60.7%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative60.7%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified60.7%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around -inf 100.0%

      \[\leadsto \color{blue}{x + -1 \cdot \frac{-1 \cdot \frac{-1 \cdot \frac{x - 1}{y} - -1 \cdot \left(x - 1\right)}{y} - -1 \cdot \left(x - 1\right)}{y}} \]
    6. Simplified100.0%

      \[\leadsto \color{blue}{x - \frac{x - \left(1 + \frac{\left(x + -1\right) - \frac{x + -1}{y}}{y}\right)}{y}} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification100.0%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -100000:\\ \;\;\;\;x + \frac{\frac{x + -1}{y} + \left(1 - x\right)}{y}\\ \mathbf{elif}\;y \leq 18500:\\ \;\;\;\;1 - \frac{y \cdot \left(x + -1\right)}{-1 - y}\\ \mathbf{else}:\\ \;\;\;\;x + \frac{\left(1 - \frac{\frac{x + -1}{y} + \left(1 - x\right)}{y}\right) - x}{y}\\ \end{array} \]
  5. Add Preprocessing

Alternative 2: 99.9% accurate, 0.5× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -330000 \lor \neg \left(y \leq 380000\right):\\ \;\;\;\;x + \frac{\frac{x + -1}{y} + \left(1 - x\right)}{y}\\ \mathbf{else}:\\ \;\;\;\;1 - \frac{y \cdot \left(x + -1\right)}{-1 - y}\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (or (<= y -330000.0) (not (<= y 380000.0)))
   (+ x (/ (+ (/ (+ x -1.0) y) (- 1.0 x)) y))
   (- 1.0 (/ (* y (+ x -1.0)) (- -1.0 y)))))
double code(double x, double y) {
	double tmp;
	if ((y <= -330000.0) || !(y <= 380000.0)) {
		tmp = x + ((((x + -1.0) / y) + (1.0 - x)) / y);
	} else {
		tmp = 1.0 - ((y * (x + -1.0)) / (-1.0 - y));
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if ((y <= (-330000.0d0)) .or. (.not. (y <= 380000.0d0))) then
        tmp = x + ((((x + (-1.0d0)) / y) + (1.0d0 - x)) / y)
    else
        tmp = 1.0d0 - ((y * (x + (-1.0d0))) / ((-1.0d0) - y))
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if ((y <= -330000.0) || !(y <= 380000.0)) {
		tmp = x + ((((x + -1.0) / y) + (1.0 - x)) / y);
	} else {
		tmp = 1.0 - ((y * (x + -1.0)) / (-1.0 - y));
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if (y <= -330000.0) or not (y <= 380000.0):
		tmp = x + ((((x + -1.0) / y) + (1.0 - x)) / y)
	else:
		tmp = 1.0 - ((y * (x + -1.0)) / (-1.0 - y))
	return tmp
function code(x, y)
	tmp = 0.0
	if ((y <= -330000.0) || !(y <= 380000.0))
		tmp = Float64(x + Float64(Float64(Float64(Float64(x + -1.0) / y) + Float64(1.0 - x)) / y));
	else
		tmp = Float64(1.0 - Float64(Float64(y * Float64(x + -1.0)) / Float64(-1.0 - y)));
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if ((y <= -330000.0) || ~((y <= 380000.0)))
		tmp = x + ((((x + -1.0) / y) + (1.0 - x)) / y);
	else
		tmp = 1.0 - ((y * (x + -1.0)) / (-1.0 - y));
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[Or[LessEqual[y, -330000.0], N[Not[LessEqual[y, 380000.0]], $MachinePrecision]], N[(x + N[(N[(N[(N[(x + -1.0), $MachinePrecision] / y), $MachinePrecision] + N[(1.0 - x), $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision], N[(1.0 - N[(N[(y * N[(x + -1.0), $MachinePrecision]), $MachinePrecision] / N[(-1.0 - y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -330000 \lor \neg \left(y \leq 380000\right):\\
\;\;\;\;x + \frac{\frac{x + -1}{y} + \left(1 - x\right)}{y}\\

\mathbf{else}:\\
\;\;\;\;1 - \frac{y \cdot \left(x + -1\right)}{-1 - y}\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -3.3e5 or 3.8e5 < y

    1. Initial program 34.0%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*56.0%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative56.0%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified56.0%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around -inf 100.0%

      \[\leadsto \color{blue}{x + -1 \cdot \frac{-1 \cdot \frac{x - 1}{y} - -1 \cdot \left(x - 1\right)}{y}} \]
    6. Step-by-step derivation
      1. mul-1-neg100.0%

        \[\leadsto x + \color{blue}{\left(-\frac{-1 \cdot \frac{x - 1}{y} - -1 \cdot \left(x - 1\right)}{y}\right)} \]
      2. unsub-neg100.0%

        \[\leadsto \color{blue}{x - \frac{-1 \cdot \frac{x - 1}{y} - -1 \cdot \left(x - 1\right)}{y}} \]
    7. Simplified100.0%

      \[\leadsto \color{blue}{x - \frac{\left(x + -1\right) - \frac{x + -1}{y}}{y}} \]

    if -3.3e5 < y < 3.8e5

    1. Initial program 99.8%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Add Preprocessing
  3. Recombined 2 regimes into one program.
  4. Final simplification99.9%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -330000 \lor \neg \left(y \leq 380000\right):\\ \;\;\;\;x + \frac{\frac{x + -1}{y} + \left(1 - x\right)}{y}\\ \mathbf{else}:\\ \;\;\;\;1 - \frac{y \cdot \left(x + -1\right)}{-1 - y}\\ \end{array} \]
  5. Add Preprocessing

Alternative 3: 99.8% accurate, 0.5× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -125000000 \lor \neg \left(y \leq 160000000\right):\\ \;\;\;\;x - \frac{x + -1}{y}\\ \mathbf{else}:\\ \;\;\;\;1 - \frac{y \cdot \left(x + -1\right)}{-1 - y}\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (or (<= y -125000000.0) (not (<= y 160000000.0)))
   (- x (/ (+ x -1.0) y))
   (- 1.0 (/ (* y (+ x -1.0)) (- -1.0 y)))))
double code(double x, double y) {
	double tmp;
	if ((y <= -125000000.0) || !(y <= 160000000.0)) {
		tmp = x - ((x + -1.0) / y);
	} else {
		tmp = 1.0 - ((y * (x + -1.0)) / (-1.0 - y));
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if ((y <= (-125000000.0d0)) .or. (.not. (y <= 160000000.0d0))) then
        tmp = x - ((x + (-1.0d0)) / y)
    else
        tmp = 1.0d0 - ((y * (x + (-1.0d0))) / ((-1.0d0) - y))
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if ((y <= -125000000.0) || !(y <= 160000000.0)) {
		tmp = x - ((x + -1.0) / y);
	} else {
		tmp = 1.0 - ((y * (x + -1.0)) / (-1.0 - y));
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if (y <= -125000000.0) or not (y <= 160000000.0):
		tmp = x - ((x + -1.0) / y)
	else:
		tmp = 1.0 - ((y * (x + -1.0)) / (-1.0 - y))
	return tmp
function code(x, y)
	tmp = 0.0
	if ((y <= -125000000.0) || !(y <= 160000000.0))
		tmp = Float64(x - Float64(Float64(x + -1.0) / y));
	else
		tmp = Float64(1.0 - Float64(Float64(y * Float64(x + -1.0)) / Float64(-1.0 - y)));
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if ((y <= -125000000.0) || ~((y <= 160000000.0)))
		tmp = x - ((x + -1.0) / y);
	else
		tmp = 1.0 - ((y * (x + -1.0)) / (-1.0 - y));
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[Or[LessEqual[y, -125000000.0], N[Not[LessEqual[y, 160000000.0]], $MachinePrecision]], N[(x - N[(N[(x + -1.0), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision], N[(1.0 - N[(N[(y * N[(x + -1.0), $MachinePrecision]), $MachinePrecision] / N[(-1.0 - y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -125000000 \lor \neg \left(y \leq 160000000\right):\\
\;\;\;\;x - \frac{x + -1}{y}\\

\mathbf{else}:\\
\;\;\;\;1 - \frac{y \cdot \left(x + -1\right)}{-1 - y}\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -1.25e8 or 1.6e8 < y

    1. Initial program 33.7%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*56.0%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative56.0%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified56.0%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around inf 99.2%

      \[\leadsto \color{blue}{\left(x + \frac{1}{y}\right) - \frac{x}{y}} \]
    6. Step-by-step derivation
      1. associate--l+99.2%

        \[\leadsto \color{blue}{x + \left(\frac{1}{y} - \frac{x}{y}\right)} \]
      2. div-sub99.2%

        \[\leadsto x + \color{blue}{\frac{1 - x}{y}} \]
      3. sub-neg99.2%

        \[\leadsto x + \frac{\color{blue}{1 + \left(-x\right)}}{y} \]
      4. +-commutative99.2%

        \[\leadsto x + \frac{\color{blue}{\left(-x\right) + 1}}{y} \]
      5. neg-sub099.2%

        \[\leadsto x + \frac{\color{blue}{\left(0 - x\right)} + 1}{y} \]
      6. associate-+l-99.2%

        \[\leadsto x + \frac{\color{blue}{0 - \left(x - 1\right)}}{y} \]
      7. neg-sub099.2%

        \[\leadsto x + \frac{\color{blue}{-\left(x - 1\right)}}{y} \]
      8. mul-1-neg99.2%

        \[\leadsto x + \frac{\color{blue}{-1 \cdot \left(x - 1\right)}}{y} \]
      9. associate-*r/99.2%

        \[\leadsto x + \color{blue}{-1 \cdot \frac{x - 1}{y}} \]
      10. mul-1-neg99.2%

        \[\leadsto x + \color{blue}{\left(-\frac{x - 1}{y}\right)} \]
      11. unsub-neg99.2%

        \[\leadsto \color{blue}{x - \frac{x - 1}{y}} \]
      12. sub-neg99.2%

        \[\leadsto x - \frac{\color{blue}{x + \left(-1\right)}}{y} \]
      13. metadata-eval99.2%

        \[\leadsto x - \frac{x + \color{blue}{-1}}{y} \]
    7. Simplified99.2%

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

    if -1.25e8 < y < 1.6e8

    1. Initial program 99.5%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Add Preprocessing
  3. Recombined 2 regimes into one program.
  4. Final simplification99.4%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -125000000 \lor \neg \left(y \leq 160000000\right):\\ \;\;\;\;x - \frac{x + -1}{y}\\ \mathbf{else}:\\ \;\;\;\;1 - \frac{y \cdot \left(x + -1\right)}{-1 - y}\\ \end{array} \]
  5. Add Preprocessing

Alternative 4: 99.8% accurate, 0.5× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -140000000 \lor \neg \left(y \leq 160000000\right):\\ \;\;\;\;x - \frac{x + -1}{y}\\ \mathbf{else}:\\ \;\;\;\;1 + \left(x + -1\right) \cdot \frac{y}{y + 1}\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (or (<= y -140000000.0) (not (<= y 160000000.0)))
   (- x (/ (+ x -1.0) y))
   (+ 1.0 (* (+ x -1.0) (/ y (+ y 1.0))))))
double code(double x, double y) {
	double tmp;
	if ((y <= -140000000.0) || !(y <= 160000000.0)) {
		tmp = x - ((x + -1.0) / y);
	} else {
		tmp = 1.0 + ((x + -1.0) * (y / (y + 1.0)));
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if ((y <= (-140000000.0d0)) .or. (.not. (y <= 160000000.0d0))) then
        tmp = x - ((x + (-1.0d0)) / y)
    else
        tmp = 1.0d0 + ((x + (-1.0d0)) * (y / (y + 1.0d0)))
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if ((y <= -140000000.0) || !(y <= 160000000.0)) {
		tmp = x - ((x + -1.0) / y);
	} else {
		tmp = 1.0 + ((x + -1.0) * (y / (y + 1.0)));
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if (y <= -140000000.0) or not (y <= 160000000.0):
		tmp = x - ((x + -1.0) / y)
	else:
		tmp = 1.0 + ((x + -1.0) * (y / (y + 1.0)))
	return tmp
function code(x, y)
	tmp = 0.0
	if ((y <= -140000000.0) || !(y <= 160000000.0))
		tmp = Float64(x - Float64(Float64(x + -1.0) / y));
	else
		tmp = Float64(1.0 + Float64(Float64(x + -1.0) * Float64(y / Float64(y + 1.0))));
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if ((y <= -140000000.0) || ~((y <= 160000000.0)))
		tmp = x - ((x + -1.0) / y);
	else
		tmp = 1.0 + ((x + -1.0) * (y / (y + 1.0)));
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[Or[LessEqual[y, -140000000.0], N[Not[LessEqual[y, 160000000.0]], $MachinePrecision]], N[(x - N[(N[(x + -1.0), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision], N[(1.0 + N[(N[(x + -1.0), $MachinePrecision] * N[(y / N[(y + 1.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -140000000 \lor \neg \left(y \leq 160000000\right):\\
\;\;\;\;x - \frac{x + -1}{y}\\

\mathbf{else}:\\
\;\;\;\;1 + \left(x + -1\right) \cdot \frac{y}{y + 1}\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -1.4e8 or 1.6e8 < y

    1. Initial program 33.7%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*56.0%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative56.0%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified56.0%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around inf 99.2%

      \[\leadsto \color{blue}{\left(x + \frac{1}{y}\right) - \frac{x}{y}} \]
    6. Step-by-step derivation
      1. associate--l+99.2%

        \[\leadsto \color{blue}{x + \left(\frac{1}{y} - \frac{x}{y}\right)} \]
      2. div-sub99.2%

        \[\leadsto x + \color{blue}{\frac{1 - x}{y}} \]
      3. sub-neg99.2%

        \[\leadsto x + \frac{\color{blue}{1 + \left(-x\right)}}{y} \]
      4. +-commutative99.2%

        \[\leadsto x + \frac{\color{blue}{\left(-x\right) + 1}}{y} \]
      5. neg-sub099.2%

        \[\leadsto x + \frac{\color{blue}{\left(0 - x\right)} + 1}{y} \]
      6. associate-+l-99.2%

        \[\leadsto x + \frac{\color{blue}{0 - \left(x - 1\right)}}{y} \]
      7. neg-sub099.2%

        \[\leadsto x + \frac{\color{blue}{-\left(x - 1\right)}}{y} \]
      8. mul-1-neg99.2%

        \[\leadsto x + \frac{\color{blue}{-1 \cdot \left(x - 1\right)}}{y} \]
      9. associate-*r/99.2%

        \[\leadsto x + \color{blue}{-1 \cdot \frac{x - 1}{y}} \]
      10. mul-1-neg99.2%

        \[\leadsto x + \color{blue}{\left(-\frac{x - 1}{y}\right)} \]
      11. unsub-neg99.2%

        \[\leadsto \color{blue}{x - \frac{x - 1}{y}} \]
      12. sub-neg99.2%

        \[\leadsto x - \frac{\color{blue}{x + \left(-1\right)}}{y} \]
      13. metadata-eval99.2%

        \[\leadsto x - \frac{x + \color{blue}{-1}}{y} \]
    7. Simplified99.2%

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

    if -1.4e8 < y < 1.6e8

    1. Initial program 99.5%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*99.5%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative99.5%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified99.5%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
  3. Recombined 2 regimes into one program.
  4. Final simplification99.3%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -140000000 \lor \neg \left(y \leq 160000000\right):\\ \;\;\;\;x - \frac{x + -1}{y}\\ \mathbf{else}:\\ \;\;\;\;1 + \left(x + -1\right) \cdot \frac{y}{y + 1}\\ \end{array} \]
  5. Add Preprocessing

Alternative 5: 99.0% accurate, 0.5× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 1\right):\\ \;\;\;\;x - \frac{x + -1}{y}\\ \mathbf{else}:\\ \;\;\;\;1 + \left(x + -1\right) \cdot \left(y \cdot \left(1 - y\right)\right)\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (or (<= y -1.0) (not (<= y 1.0)))
   (- x (/ (+ x -1.0) y))
   (+ 1.0 (* (+ x -1.0) (* y (- 1.0 y))))))
double code(double x, double y) {
	double tmp;
	if ((y <= -1.0) || !(y <= 1.0)) {
		tmp = x - ((x + -1.0) / y);
	} else {
		tmp = 1.0 + ((x + -1.0) * (y * (1.0 - y)));
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if ((y <= (-1.0d0)) .or. (.not. (y <= 1.0d0))) then
        tmp = x - ((x + (-1.0d0)) / y)
    else
        tmp = 1.0d0 + ((x + (-1.0d0)) * (y * (1.0d0 - y)))
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if ((y <= -1.0) || !(y <= 1.0)) {
		tmp = x - ((x + -1.0) / y);
	} else {
		tmp = 1.0 + ((x + -1.0) * (y * (1.0 - y)));
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if (y <= -1.0) or not (y <= 1.0):
		tmp = x - ((x + -1.0) / y)
	else:
		tmp = 1.0 + ((x + -1.0) * (y * (1.0 - y)))
	return tmp
function code(x, y)
	tmp = 0.0
	if ((y <= -1.0) || !(y <= 1.0))
		tmp = Float64(x - Float64(Float64(x + -1.0) / y));
	else
		tmp = Float64(1.0 + Float64(Float64(x + -1.0) * Float64(y * Float64(1.0 - y))));
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if ((y <= -1.0) || ~((y <= 1.0)))
		tmp = x - ((x + -1.0) / y);
	else
		tmp = 1.0 + ((x + -1.0) * (y * (1.0 - y)));
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[Or[LessEqual[y, -1.0], N[Not[LessEqual[y, 1.0]], $MachinePrecision]], N[(x - N[(N[(x + -1.0), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision], N[(1.0 + N[(N[(x + -1.0), $MachinePrecision] * N[(y * N[(1.0 - y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 1\right):\\
\;\;\;\;x - \frac{x + -1}{y}\\

\mathbf{else}:\\
\;\;\;\;1 + \left(x + -1\right) \cdot \left(y \cdot \left(1 - y\right)\right)\\


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

    1. Initial program 34.3%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*56.2%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative56.2%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified56.2%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around inf 98.5%

      \[\leadsto \color{blue}{\left(x + \frac{1}{y}\right) - \frac{x}{y}} \]
    6. Step-by-step derivation
      1. associate--l+98.5%

        \[\leadsto \color{blue}{x + \left(\frac{1}{y} - \frac{x}{y}\right)} \]
      2. div-sub98.5%

        \[\leadsto x + \color{blue}{\frac{1 - x}{y}} \]
      3. sub-neg98.5%

        \[\leadsto x + \frac{\color{blue}{1 + \left(-x\right)}}{y} \]
      4. +-commutative98.5%

        \[\leadsto x + \frac{\color{blue}{\left(-x\right) + 1}}{y} \]
      5. neg-sub098.5%

        \[\leadsto x + \frac{\color{blue}{\left(0 - x\right)} + 1}{y} \]
      6. associate-+l-98.5%

        \[\leadsto x + \frac{\color{blue}{0 - \left(x - 1\right)}}{y} \]
      7. neg-sub098.5%

        \[\leadsto x + \frac{\color{blue}{-\left(x - 1\right)}}{y} \]
      8. mul-1-neg98.5%

        \[\leadsto x + \frac{\color{blue}{-1 \cdot \left(x - 1\right)}}{y} \]
      9. associate-*r/98.5%

        \[\leadsto x + \color{blue}{-1 \cdot \frac{x - 1}{y}} \]
      10. mul-1-neg98.5%

        \[\leadsto x + \color{blue}{\left(-\frac{x - 1}{y}\right)} \]
      11. unsub-neg98.5%

        \[\leadsto \color{blue}{x - \frac{x - 1}{y}} \]
      12. sub-neg98.5%

        \[\leadsto x - \frac{\color{blue}{x + \left(-1\right)}}{y} \]
      13. metadata-eval98.5%

        \[\leadsto x - \frac{x + \color{blue}{-1}}{y} \]
    7. Simplified98.5%

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

    if -1 < y < 1

    1. Initial program 100.0%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*100.0%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative100.0%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around 0 98.7%

      \[\leadsto 1 - \left(1 - x\right) \cdot \color{blue}{\left(y \cdot \left(1 + -1 \cdot y\right)\right)} \]
    6. Step-by-step derivation
      1. neg-mul-198.7%

        \[\leadsto 1 - \left(1 - x\right) \cdot \left(y \cdot \left(1 + \color{blue}{\left(-y\right)}\right)\right) \]
      2. sub-neg98.7%

        \[\leadsto 1 - \left(1 - x\right) \cdot \left(y \cdot \color{blue}{\left(1 - y\right)}\right) \]
    7. Simplified98.7%

      \[\leadsto 1 - \left(1 - x\right) \cdot \color{blue}{\left(y \cdot \left(1 - y\right)\right)} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification98.6%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 1\right):\\ \;\;\;\;x - \frac{x + -1}{y}\\ \mathbf{else}:\\ \;\;\;\;1 + \left(x + -1\right) \cdot \left(y \cdot \left(1 - y\right)\right)\\ \end{array} \]
  5. Add Preprocessing

Alternative 6: 98.8% accurate, 0.6× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 1\right):\\ \;\;\;\;x - \frac{x + -1}{y}\\ \mathbf{else}:\\ \;\;\;\;1 + y \cdot \left(x + -1\right)\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (or (<= y -1.0) (not (<= y 1.0)))
   (- x (/ (+ x -1.0) y))
   (+ 1.0 (* y (+ x -1.0)))))
double code(double x, double y) {
	double tmp;
	if ((y <= -1.0) || !(y <= 1.0)) {
		tmp = x - ((x + -1.0) / y);
	} else {
		tmp = 1.0 + (y * (x + -1.0));
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if ((y <= (-1.0d0)) .or. (.not. (y <= 1.0d0))) then
        tmp = x - ((x + (-1.0d0)) / y)
    else
        tmp = 1.0d0 + (y * (x + (-1.0d0)))
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if ((y <= -1.0) || !(y <= 1.0)) {
		tmp = x - ((x + -1.0) / y);
	} else {
		tmp = 1.0 + (y * (x + -1.0));
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if (y <= -1.0) or not (y <= 1.0):
		tmp = x - ((x + -1.0) / y)
	else:
		tmp = 1.0 + (y * (x + -1.0))
	return tmp
function code(x, y)
	tmp = 0.0
	if ((y <= -1.0) || !(y <= 1.0))
		tmp = Float64(x - Float64(Float64(x + -1.0) / y));
	else
		tmp = Float64(1.0 + Float64(y * Float64(x + -1.0)));
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if ((y <= -1.0) || ~((y <= 1.0)))
		tmp = x - ((x + -1.0) / y);
	else
		tmp = 1.0 + (y * (x + -1.0));
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[Or[LessEqual[y, -1.0], N[Not[LessEqual[y, 1.0]], $MachinePrecision]], N[(x - N[(N[(x + -1.0), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision], N[(1.0 + N[(y * N[(x + -1.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 1\right):\\
\;\;\;\;x - \frac{x + -1}{y}\\

\mathbf{else}:\\
\;\;\;\;1 + y \cdot \left(x + -1\right)\\


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

    1. Initial program 34.3%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*56.2%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative56.2%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified56.2%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around inf 98.5%

      \[\leadsto \color{blue}{\left(x + \frac{1}{y}\right) - \frac{x}{y}} \]
    6. Step-by-step derivation
      1. associate--l+98.5%

        \[\leadsto \color{blue}{x + \left(\frac{1}{y} - \frac{x}{y}\right)} \]
      2. div-sub98.5%

        \[\leadsto x + \color{blue}{\frac{1 - x}{y}} \]
      3. sub-neg98.5%

        \[\leadsto x + \frac{\color{blue}{1 + \left(-x\right)}}{y} \]
      4. +-commutative98.5%

        \[\leadsto x + \frac{\color{blue}{\left(-x\right) + 1}}{y} \]
      5. neg-sub098.5%

        \[\leadsto x + \frac{\color{blue}{\left(0 - x\right)} + 1}{y} \]
      6. associate-+l-98.5%

        \[\leadsto x + \frac{\color{blue}{0 - \left(x - 1\right)}}{y} \]
      7. neg-sub098.5%

        \[\leadsto x + \frac{\color{blue}{-\left(x - 1\right)}}{y} \]
      8. mul-1-neg98.5%

        \[\leadsto x + \frac{\color{blue}{-1 \cdot \left(x - 1\right)}}{y} \]
      9. associate-*r/98.5%

        \[\leadsto x + \color{blue}{-1 \cdot \frac{x - 1}{y}} \]
      10. mul-1-neg98.5%

        \[\leadsto x + \color{blue}{\left(-\frac{x - 1}{y}\right)} \]
      11. unsub-neg98.5%

        \[\leadsto \color{blue}{x - \frac{x - 1}{y}} \]
      12. sub-neg98.5%

        \[\leadsto x - \frac{\color{blue}{x + \left(-1\right)}}{y} \]
      13. metadata-eval98.5%

        \[\leadsto x - \frac{x + \color{blue}{-1}}{y} \]
    7. Simplified98.5%

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

    if -1 < y < 1

    1. Initial program 100.0%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*100.0%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative100.0%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around 0 97.3%

      \[\leadsto 1 - \left(1 - x\right) \cdot \color{blue}{y} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification97.9%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 1\right):\\ \;\;\;\;x - \frac{x + -1}{y}\\ \mathbf{else}:\\ \;\;\;\;1 + y \cdot \left(x + -1\right)\\ \end{array} \]
  5. Add Preprocessing

Alternative 7: 98.5% accurate, 0.6× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 0.79\right):\\ \;\;\;\;x - \frac{-1}{y}\\ \mathbf{else}:\\ \;\;\;\;1 + y \cdot \left(x + -1\right)\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (or (<= y -1.0) (not (<= y 0.79)))
   (- x (/ -1.0 y))
   (+ 1.0 (* y (+ x -1.0)))))
double code(double x, double y) {
	double tmp;
	if ((y <= -1.0) || !(y <= 0.79)) {
		tmp = x - (-1.0 / y);
	} else {
		tmp = 1.0 + (y * (x + -1.0));
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if ((y <= (-1.0d0)) .or. (.not. (y <= 0.79d0))) then
        tmp = x - ((-1.0d0) / y)
    else
        tmp = 1.0d0 + (y * (x + (-1.0d0)))
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if ((y <= -1.0) || !(y <= 0.79)) {
		tmp = x - (-1.0 / y);
	} else {
		tmp = 1.0 + (y * (x + -1.0));
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if (y <= -1.0) or not (y <= 0.79):
		tmp = x - (-1.0 / y)
	else:
		tmp = 1.0 + (y * (x + -1.0))
	return tmp
function code(x, y)
	tmp = 0.0
	if ((y <= -1.0) || !(y <= 0.79))
		tmp = Float64(x - Float64(-1.0 / y));
	else
		tmp = Float64(1.0 + Float64(y * Float64(x + -1.0)));
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if ((y <= -1.0) || ~((y <= 0.79)))
		tmp = x - (-1.0 / y);
	else
		tmp = 1.0 + (y * (x + -1.0));
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[Or[LessEqual[y, -1.0], N[Not[LessEqual[y, 0.79]], $MachinePrecision]], N[(x - N[(-1.0 / y), $MachinePrecision]), $MachinePrecision], N[(1.0 + N[(y * N[(x + -1.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 0.79\right):\\
\;\;\;\;x - \frac{-1}{y}\\

\mathbf{else}:\\
\;\;\;\;1 + y \cdot \left(x + -1\right)\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -1 or 0.79000000000000004 < y

    1. Initial program 34.3%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*56.2%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative56.2%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified56.2%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around inf 98.5%

      \[\leadsto \color{blue}{\left(x + \frac{1}{y}\right) - \frac{x}{y}} \]
    6. Step-by-step derivation
      1. associate--l+98.5%

        \[\leadsto \color{blue}{x + \left(\frac{1}{y} - \frac{x}{y}\right)} \]
      2. div-sub98.5%

        \[\leadsto x + \color{blue}{\frac{1 - x}{y}} \]
      3. sub-neg98.5%

        \[\leadsto x + \frac{\color{blue}{1 + \left(-x\right)}}{y} \]
      4. +-commutative98.5%

        \[\leadsto x + \frac{\color{blue}{\left(-x\right) + 1}}{y} \]
      5. neg-sub098.5%

        \[\leadsto x + \frac{\color{blue}{\left(0 - x\right)} + 1}{y} \]
      6. associate-+l-98.5%

        \[\leadsto x + \frac{\color{blue}{0 - \left(x - 1\right)}}{y} \]
      7. neg-sub098.5%

        \[\leadsto x + \frac{\color{blue}{-\left(x - 1\right)}}{y} \]
      8. mul-1-neg98.5%

        \[\leadsto x + \frac{\color{blue}{-1 \cdot \left(x - 1\right)}}{y} \]
      9. associate-*r/98.5%

        \[\leadsto x + \color{blue}{-1 \cdot \frac{x - 1}{y}} \]
      10. mul-1-neg98.5%

        \[\leadsto x + \color{blue}{\left(-\frac{x - 1}{y}\right)} \]
      11. unsub-neg98.5%

        \[\leadsto \color{blue}{x - \frac{x - 1}{y}} \]
      12. sub-neg98.5%

        \[\leadsto x - \frac{\color{blue}{x + \left(-1\right)}}{y} \]
      13. metadata-eval98.5%

        \[\leadsto x - \frac{x + \color{blue}{-1}}{y} \]
    7. Simplified98.5%

      \[\leadsto \color{blue}{x - \frac{x + -1}{y}} \]
    8. Taylor expanded in x around 0 97.8%

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

    if -1 < y < 0.79000000000000004

    1. Initial program 100.0%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*100.0%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative100.0%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around 0 97.3%

      \[\leadsto 1 - \left(1 - x\right) \cdot \color{blue}{y} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification97.6%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 0.79\right):\\ \;\;\;\;x - \frac{-1}{y}\\ \mathbf{else}:\\ \;\;\;\;1 + y \cdot \left(x + -1\right)\\ \end{array} \]
  5. Add Preprocessing

Alternative 8: 98.3% accurate, 0.7× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 1\right):\\ \;\;\;\;x - \frac{-1}{y}\\ \mathbf{else}:\\ \;\;\;\;1 + y \cdot x\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (or (<= y -1.0) (not (<= y 1.0))) (- x (/ -1.0 y)) (+ 1.0 (* y x))))
double code(double x, double y) {
	double tmp;
	if ((y <= -1.0) || !(y <= 1.0)) {
		tmp = x - (-1.0 / y);
	} else {
		tmp = 1.0 + (y * x);
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if ((y <= (-1.0d0)) .or. (.not. (y <= 1.0d0))) then
        tmp = x - ((-1.0d0) / y)
    else
        tmp = 1.0d0 + (y * x)
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if ((y <= -1.0) || !(y <= 1.0)) {
		tmp = x - (-1.0 / y);
	} else {
		tmp = 1.0 + (y * x);
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if (y <= -1.0) or not (y <= 1.0):
		tmp = x - (-1.0 / y)
	else:
		tmp = 1.0 + (y * x)
	return tmp
function code(x, y)
	tmp = 0.0
	if ((y <= -1.0) || !(y <= 1.0))
		tmp = Float64(x - Float64(-1.0 / y));
	else
		tmp = Float64(1.0 + Float64(y * x));
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if ((y <= -1.0) || ~((y <= 1.0)))
		tmp = x - (-1.0 / y);
	else
		tmp = 1.0 + (y * x);
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[Or[LessEqual[y, -1.0], N[Not[LessEqual[y, 1.0]], $MachinePrecision]], N[(x - N[(-1.0 / y), $MachinePrecision]), $MachinePrecision], N[(1.0 + N[(y * x), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 1\right):\\
\;\;\;\;x - \frac{-1}{y}\\

\mathbf{else}:\\
\;\;\;\;1 + y \cdot x\\


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

    1. Initial program 34.3%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*56.2%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative56.2%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified56.2%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around inf 98.5%

      \[\leadsto \color{blue}{\left(x + \frac{1}{y}\right) - \frac{x}{y}} \]
    6. Step-by-step derivation
      1. associate--l+98.5%

        \[\leadsto \color{blue}{x + \left(\frac{1}{y} - \frac{x}{y}\right)} \]
      2. div-sub98.5%

        \[\leadsto x + \color{blue}{\frac{1 - x}{y}} \]
      3. sub-neg98.5%

        \[\leadsto x + \frac{\color{blue}{1 + \left(-x\right)}}{y} \]
      4. +-commutative98.5%

        \[\leadsto x + \frac{\color{blue}{\left(-x\right) + 1}}{y} \]
      5. neg-sub098.5%

        \[\leadsto x + \frac{\color{blue}{\left(0 - x\right)} + 1}{y} \]
      6. associate-+l-98.5%

        \[\leadsto x + \frac{\color{blue}{0 - \left(x - 1\right)}}{y} \]
      7. neg-sub098.5%

        \[\leadsto x + \frac{\color{blue}{-\left(x - 1\right)}}{y} \]
      8. mul-1-neg98.5%

        \[\leadsto x + \frac{\color{blue}{-1 \cdot \left(x - 1\right)}}{y} \]
      9. associate-*r/98.5%

        \[\leadsto x + \color{blue}{-1 \cdot \frac{x - 1}{y}} \]
      10. mul-1-neg98.5%

        \[\leadsto x + \color{blue}{\left(-\frac{x - 1}{y}\right)} \]
      11. unsub-neg98.5%

        \[\leadsto \color{blue}{x - \frac{x - 1}{y}} \]
      12. sub-neg98.5%

        \[\leadsto x - \frac{\color{blue}{x + \left(-1\right)}}{y} \]
      13. metadata-eval98.5%

        \[\leadsto x - \frac{x + \color{blue}{-1}}{y} \]
    7. Simplified98.5%

      \[\leadsto \color{blue}{x - \frac{x + -1}{y}} \]
    8. Taylor expanded in x around 0 97.8%

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

    if -1 < y < 1

    1. Initial program 100.0%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*100.0%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative100.0%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around 0 97.3%

      \[\leadsto 1 - \left(1 - x\right) \cdot \color{blue}{y} \]
    6. Taylor expanded in x around inf 96.8%

      \[\leadsto 1 - \color{blue}{\left(-1 \cdot x\right)} \cdot y \]
    7. Step-by-step derivation
      1. neg-mul-196.8%

        \[\leadsto 1 - \color{blue}{\left(-x\right)} \cdot y \]
    8. Simplified96.8%

      \[\leadsto 1 - \color{blue}{\left(-x\right)} \cdot y \]
    9. Step-by-step derivation
      1. cancel-sign-sub96.8%

        \[\leadsto \color{blue}{1 + x \cdot y} \]
      2. +-commutative96.8%

        \[\leadsto \color{blue}{x \cdot y + 1} \]
    10. Applied egg-rr96.8%

      \[\leadsto \color{blue}{x \cdot y + 1} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification97.3%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 1\right):\\ \;\;\;\;x - \frac{-1}{y}\\ \mathbf{else}:\\ \;\;\;\;1 + y \cdot x\\ \end{array} \]
  5. Add Preprocessing

Alternative 9: 86.1% accurate, 0.7× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -1:\\ \;\;\;\;x\\ \mathbf{elif}\;y \leq 120000000:\\ \;\;\;\;1 + y \cdot x\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (<= y -1.0) x (if (<= y 120000000.0) (+ 1.0 (* y x)) x)))
double code(double x, double y) {
	double tmp;
	if (y <= -1.0) {
		tmp = x;
	} else if (y <= 120000000.0) {
		tmp = 1.0 + (y * x);
	} else {
		tmp = x;
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if (y <= (-1.0d0)) then
        tmp = x
    else if (y <= 120000000.0d0) then
        tmp = 1.0d0 + (y * x)
    else
        tmp = x
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if (y <= -1.0) {
		tmp = x;
	} else if (y <= 120000000.0) {
		tmp = 1.0 + (y * x);
	} else {
		tmp = x;
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if y <= -1.0:
		tmp = x
	elif y <= 120000000.0:
		tmp = 1.0 + (y * x)
	else:
		tmp = x
	return tmp
function code(x, y)
	tmp = 0.0
	if (y <= -1.0)
		tmp = x;
	elseif (y <= 120000000.0)
		tmp = Float64(1.0 + Float64(y * x));
	else
		tmp = x;
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if (y <= -1.0)
		tmp = x;
	elseif (y <= 120000000.0)
		tmp = 1.0 + (y * x);
	else
		tmp = x;
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[LessEqual[y, -1.0], x, If[LessEqual[y, 120000000.0], N[(1.0 + N[(y * x), $MachinePrecision]), $MachinePrecision], x]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -1:\\
\;\;\;\;x\\

\mathbf{elif}\;y \leq 120000000:\\
\;\;\;\;1 + y \cdot x\\

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


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -1 or 1.2e8 < y

    1. Initial program 33.7%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*56.0%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative56.0%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified56.0%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around inf 79.0%

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

    if -1 < y < 1.2e8

    1. Initial program 99.5%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*99.5%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative99.5%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified99.5%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around 0 95.8%

      \[\leadsto 1 - \left(1 - x\right) \cdot \color{blue}{y} \]
    6. Taylor expanded in x around inf 95.4%

      \[\leadsto 1 - \color{blue}{\left(-1 \cdot x\right)} \cdot y \]
    7. Step-by-step derivation
      1. neg-mul-195.4%

        \[\leadsto 1 - \color{blue}{\left(-x\right)} \cdot y \]
    8. Simplified95.4%

      \[\leadsto 1 - \color{blue}{\left(-x\right)} \cdot y \]
    9. Step-by-step derivation
      1. cancel-sign-sub95.4%

        \[\leadsto \color{blue}{1 + x \cdot y} \]
      2. +-commutative95.4%

        \[\leadsto \color{blue}{x \cdot y + 1} \]
    10. Applied egg-rr95.4%

      \[\leadsto \color{blue}{x \cdot y + 1} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification87.0%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -1:\\ \;\;\;\;x\\ \mathbf{elif}\;y \leq 120000000:\\ \;\;\;\;1 + y \cdot x\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \]
  5. Add Preprocessing

Alternative 10: 74.8% accurate, 0.8× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -1:\\ \;\;\;\;x\\ \mathbf{elif}\;y \leq 0.96:\\ \;\;\;\;1 - y\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (<= y -1.0) x (if (<= y 0.96) (- 1.0 y) x)))
double code(double x, double y) {
	double tmp;
	if (y <= -1.0) {
		tmp = x;
	} else if (y <= 0.96) {
		tmp = 1.0 - y;
	} else {
		tmp = x;
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if (y <= (-1.0d0)) then
        tmp = x
    else if (y <= 0.96d0) then
        tmp = 1.0d0 - y
    else
        tmp = x
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if (y <= -1.0) {
		tmp = x;
	} else if (y <= 0.96) {
		tmp = 1.0 - y;
	} else {
		tmp = x;
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if y <= -1.0:
		tmp = x
	elif y <= 0.96:
		tmp = 1.0 - y
	else:
		tmp = x
	return tmp
function code(x, y)
	tmp = 0.0
	if (y <= -1.0)
		tmp = x;
	elseif (y <= 0.96)
		tmp = Float64(1.0 - y);
	else
		tmp = x;
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if (y <= -1.0)
		tmp = x;
	elseif (y <= 0.96)
		tmp = 1.0 - y;
	else
		tmp = x;
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[LessEqual[y, -1.0], x, If[LessEqual[y, 0.96], N[(1.0 - y), $MachinePrecision], x]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -1:\\
\;\;\;\;x\\

\mathbf{elif}\;y \leq 0.96:\\
\;\;\;\;1 - y\\

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


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -1 or 0.95999999999999996 < y

    1. Initial program 34.3%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*56.2%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative56.2%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified56.2%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around inf 77.9%

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

    if -1 < y < 0.95999999999999996

    1. Initial program 100.0%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*100.0%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative100.0%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in x around 0 78.8%

      \[\leadsto \color{blue}{1 - \frac{y}{1 + y}} \]
    6. Taylor expanded in y around 0 77.5%

      \[\leadsto \color{blue}{1 + -1 \cdot y} \]
    7. Step-by-step derivation
      1. neg-mul-177.5%

        \[\leadsto 1 + \color{blue}{\left(-y\right)} \]
      2. sub-neg77.5%

        \[\leadsto \color{blue}{1 - y} \]
    8. Simplified77.5%

      \[\leadsto \color{blue}{1 - y} \]
  3. Recombined 2 regimes into one program.
  4. Add Preprocessing

Alternative 11: 74.6% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -1:\\ \;\;\;\;x\\ \mathbf{elif}\;y \leq 120000000:\\ \;\;\;\;1\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (<= y -1.0) x (if (<= y 120000000.0) 1.0 x)))
double code(double x, double y) {
	double tmp;
	if (y <= -1.0) {
		tmp = x;
	} else if (y <= 120000000.0) {
		tmp = 1.0;
	} else {
		tmp = x;
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if (y <= (-1.0d0)) then
        tmp = x
    else if (y <= 120000000.0d0) then
        tmp = 1.0d0
    else
        tmp = x
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if (y <= -1.0) {
		tmp = x;
	} else if (y <= 120000000.0) {
		tmp = 1.0;
	} else {
		tmp = x;
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if y <= -1.0:
		tmp = x
	elif y <= 120000000.0:
		tmp = 1.0
	else:
		tmp = x
	return tmp
function code(x, y)
	tmp = 0.0
	if (y <= -1.0)
		tmp = x;
	elseif (y <= 120000000.0)
		tmp = 1.0;
	else
		tmp = x;
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if (y <= -1.0)
		tmp = x;
	elseif (y <= 120000000.0)
		tmp = 1.0;
	else
		tmp = x;
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[LessEqual[y, -1.0], x, If[LessEqual[y, 120000000.0], 1.0, x]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -1:\\
\;\;\;\;x\\

\mathbf{elif}\;y \leq 120000000:\\
\;\;\;\;1\\

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


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -1 or 1.2e8 < y

    1. Initial program 33.7%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*56.0%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative56.0%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified56.0%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around inf 79.0%

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

    if -1 < y < 1.2e8

    1. Initial program 99.5%

      \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
    2. Step-by-step derivation
      1. associate-/l*99.5%

        \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
      2. +-commutative99.5%

        \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
    3. Simplified99.5%

      \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
    4. Add Preprocessing
    5. Taylor expanded in y around 0 75.9%

      \[\leadsto \color{blue}{1} \]
  3. Recombined 2 regimes into one program.
  4. Add Preprocessing

Alternative 12: 39.0% accurate, 11.0× speedup?

\[\begin{array}{l} \\ 1 \end{array} \]
(FPCore (x y) :precision binary64 1.0)
double code(double x, double y) {
	return 1.0;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = 1.0d0
end function
public static double code(double x, double y) {
	return 1.0;
}
def code(x, y):
	return 1.0
function code(x, y)
	return 1.0
end
function tmp = code(x, y)
	tmp = 1.0;
end
code[x_, y_] := 1.0
\begin{array}{l}

\\
1
\end{array}
Derivation
  1. Initial program 65.9%

    \[1 - \frac{\left(1 - x\right) \cdot y}{y + 1} \]
  2. Step-by-step derivation
    1. associate-/l*77.2%

      \[\leadsto 1 - \color{blue}{\left(1 - x\right) \cdot \frac{y}{y + 1}} \]
    2. +-commutative77.2%

      \[\leadsto 1 - \left(1 - x\right) \cdot \frac{y}{\color{blue}{1 + y}} \]
  3. Simplified77.2%

    \[\leadsto \color{blue}{1 - \left(1 - x\right) \cdot \frac{y}{1 + y}} \]
  4. Add Preprocessing
  5. Taylor expanded in y around 0 39.0%

    \[\leadsto \color{blue}{1} \]
  6. Add Preprocessing

Developer Target 1: 99.7% accurate, 0.5× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \frac{1}{y} - \left(\frac{x}{y} - x\right)\\ \mathbf{if}\;y < -3693.8482788297247:\\ \;\;\;\;t\_0\\ \mathbf{elif}\;y < 6799310503.41891:\\ \;\;\;\;1 - \frac{\left(1 - x\right) \cdot y}{y + 1}\\ \mathbf{else}:\\ \;\;\;\;t\_0\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (let* ((t_0 (- (/ 1.0 y) (- (/ x y) x))))
   (if (< y -3693.8482788297247)
     t_0
     (if (< y 6799310503.41891) (- 1.0 (/ (* (- 1.0 x) y) (+ y 1.0))) t_0))))
double code(double x, double y) {
	double t_0 = (1.0 / y) - ((x / y) - x);
	double tmp;
	if (y < -3693.8482788297247) {
		tmp = t_0;
	} else if (y < 6799310503.41891) {
		tmp = 1.0 - (((1.0 - x) * y) / (y + 1.0));
	} else {
		tmp = t_0;
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: t_0
    real(8) :: tmp
    t_0 = (1.0d0 / y) - ((x / y) - x)
    if (y < (-3693.8482788297247d0)) then
        tmp = t_0
    else if (y < 6799310503.41891d0) then
        tmp = 1.0d0 - (((1.0d0 - x) * y) / (y + 1.0d0))
    else
        tmp = t_0
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double t_0 = (1.0 / y) - ((x / y) - x);
	double tmp;
	if (y < -3693.8482788297247) {
		tmp = t_0;
	} else if (y < 6799310503.41891) {
		tmp = 1.0 - (((1.0 - x) * y) / (y + 1.0));
	} else {
		tmp = t_0;
	}
	return tmp;
}
def code(x, y):
	t_0 = (1.0 / y) - ((x / y) - x)
	tmp = 0
	if y < -3693.8482788297247:
		tmp = t_0
	elif y < 6799310503.41891:
		tmp = 1.0 - (((1.0 - x) * y) / (y + 1.0))
	else:
		tmp = t_0
	return tmp
function code(x, y)
	t_0 = Float64(Float64(1.0 / y) - Float64(Float64(x / y) - x))
	tmp = 0.0
	if (y < -3693.8482788297247)
		tmp = t_0;
	elseif (y < 6799310503.41891)
		tmp = Float64(1.0 - Float64(Float64(Float64(1.0 - x) * y) / Float64(y + 1.0)));
	else
		tmp = t_0;
	end
	return tmp
end
function tmp_2 = code(x, y)
	t_0 = (1.0 / y) - ((x / y) - x);
	tmp = 0.0;
	if (y < -3693.8482788297247)
		tmp = t_0;
	elseif (y < 6799310503.41891)
		tmp = 1.0 - (((1.0 - x) * y) / (y + 1.0));
	else
		tmp = t_0;
	end
	tmp_2 = tmp;
end
code[x_, y_] := Block[{t$95$0 = N[(N[(1.0 / y), $MachinePrecision] - N[(N[(x / y), $MachinePrecision] - x), $MachinePrecision]), $MachinePrecision]}, If[Less[y, -3693.8482788297247], t$95$0, If[Less[y, 6799310503.41891], N[(1.0 - N[(N[(N[(1.0 - x), $MachinePrecision] * y), $MachinePrecision] / N[(y + 1.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], t$95$0]]]
\begin{array}{l}

\\
\begin{array}{l}
t_0 := \frac{1}{y} - \left(\frac{x}{y} - x\right)\\
\mathbf{if}\;y < -3693.8482788297247:\\
\;\;\;\;t\_0\\

\mathbf{elif}\;y < 6799310503.41891:\\
\;\;\;\;1 - \frac{\left(1 - x\right) \cdot y}{y + 1}\\

\mathbf{else}:\\
\;\;\;\;t\_0\\


\end{array}
\end{array}

Reproduce

?
herbie shell --seed 2024123 
(FPCore (x y)
  :name "Diagrams.Trail:splitAtParam  from diagrams-lib-1.3.0.3, D"
  :precision binary64

  :alt
  (! :herbie-platform default (if (< y -36938482788297247/10000000000000) (- (/ 1 y) (- (/ x y) x)) (if (< y 679931050341891/100000) (- 1 (/ (* (- 1 x) y) (+ y 1))) (- (/ 1 y) (- (/ x y) x)))))

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