Numeric.SpecFunctions:incompleteGamma from math-functions-0.1.5.2, B

Percentage Accurate: 99.4% → 99.4%
Time: 11.0s
Alternatives: 9
Speedup: 1.0×

Specification

?
\[\begin{array}{l} \\ \left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \end{array} \]
(FPCore (x y)
 :precision binary64
 (* (* 3.0 (sqrt x)) (- (+ y (/ 1.0 (* x 9.0))) 1.0)))
double code(double x, double y) {
	return (3.0 * sqrt(x)) * ((y + (1.0 / (x * 9.0))) - 1.0);
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = (3.0d0 * sqrt(x)) * ((y + (1.0d0 / (x * 9.0d0))) - 1.0d0)
end function
public static double code(double x, double y) {
	return (3.0 * Math.sqrt(x)) * ((y + (1.0 / (x * 9.0))) - 1.0);
}
def code(x, y):
	return (3.0 * math.sqrt(x)) * ((y + (1.0 / (x * 9.0))) - 1.0)
function code(x, y)
	return Float64(Float64(3.0 * sqrt(x)) * Float64(Float64(y + Float64(1.0 / Float64(x * 9.0))) - 1.0))
end
function tmp = code(x, y)
	tmp = (3.0 * sqrt(x)) * ((y + (1.0 / (x * 9.0))) - 1.0);
end
code[x_, y_] := N[(N[(3.0 * N[Sqrt[x], $MachinePrecision]), $MachinePrecision] * N[(N[(y + N[(1.0 / N[(x * 9.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] - 1.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right)
\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 9 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: 99.4% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \end{array} \]
(FPCore (x y)
 :precision binary64
 (* (* 3.0 (sqrt x)) (- (+ y (/ 1.0 (* x 9.0))) 1.0)))
double code(double x, double y) {
	return (3.0 * sqrt(x)) * ((y + (1.0 / (x * 9.0))) - 1.0);
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = (3.0d0 * sqrt(x)) * ((y + (1.0d0 / (x * 9.0d0))) - 1.0d0)
end function
public static double code(double x, double y) {
	return (3.0 * Math.sqrt(x)) * ((y + (1.0 / (x * 9.0))) - 1.0);
}
def code(x, y):
	return (3.0 * math.sqrt(x)) * ((y + (1.0 / (x * 9.0))) - 1.0)
function code(x, y)
	return Float64(Float64(3.0 * sqrt(x)) * Float64(Float64(y + Float64(1.0 / Float64(x * 9.0))) - 1.0))
end
function tmp = code(x, y)
	tmp = (3.0 * sqrt(x)) * ((y + (1.0 / (x * 9.0))) - 1.0);
end
code[x_, y_] := N[(N[(3.0 * N[Sqrt[x], $MachinePrecision]), $MachinePrecision] * N[(N[(y + N[(1.0 / N[(x * 9.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] - 1.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right)
\end{array}

Alternative 1: 99.4% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \sqrt{x \cdot 9} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \end{array} \]
(FPCore (x y)
 :precision binary64
 (* (sqrt (* x 9.0)) (+ y (+ (/ 0.1111111111111111 x) -1.0))))
double code(double x, double y) {
	return sqrt((x * 9.0)) * (y + ((0.1111111111111111 / x) + -1.0));
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = sqrt((x * 9.0d0)) * (y + ((0.1111111111111111d0 / x) + (-1.0d0)))
end function
public static double code(double x, double y) {
	return Math.sqrt((x * 9.0)) * (y + ((0.1111111111111111 / x) + -1.0));
}
def code(x, y):
	return math.sqrt((x * 9.0)) * (y + ((0.1111111111111111 / x) + -1.0))
function code(x, y)
	return Float64(sqrt(Float64(x * 9.0)) * Float64(y + Float64(Float64(0.1111111111111111 / x) + -1.0)))
end
function tmp = code(x, y)
	tmp = sqrt((x * 9.0)) * (y + ((0.1111111111111111 / x) + -1.0));
end
code[x_, y_] := N[(N[Sqrt[N[(x * 9.0), $MachinePrecision]], $MachinePrecision] * N[(y + N[(N[(0.1111111111111111 / x), $MachinePrecision] + -1.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
\sqrt{x \cdot 9} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right)
\end{array}
Derivation
  1. Initial program 99.4%

    \[\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
  2. Step-by-step derivation
    1. associate--l+99.4%

      \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \color{blue}{\left(y + \left(\frac{1}{x \cdot 9} - 1\right)\right)} \]
    2. sub-neg99.4%

      \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \color{blue}{\left(\frac{1}{x \cdot 9} + \left(-1\right)\right)}\right) \]
    3. *-commutative99.4%

      \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{1}{\color{blue}{9 \cdot x}} + \left(-1\right)\right)\right) \]
    4. associate-/r*99.4%

      \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\color{blue}{\frac{\frac{1}{9}}{x}} + \left(-1\right)\right)\right) \]
    5. metadata-eval99.4%

      \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{\color{blue}{0.1111111111111111}}{x} + \left(-1\right)\right)\right) \]
    6. metadata-eval99.4%

      \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{0.1111111111111111}{x} + \color{blue}{-1}\right)\right) \]
  3. Simplified99.4%

    \[\leadsto \color{blue}{\left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right)} \]
  4. Step-by-step derivation
    1. *-commutative99.4%

      \[\leadsto \color{blue}{\left(\sqrt{x} \cdot 3\right)} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    2. metadata-eval99.4%

      \[\leadsto \left(\sqrt{x} \cdot \color{blue}{\sqrt{9}}\right) \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    3. sqrt-prod99.6%

      \[\leadsto \color{blue}{\sqrt{x \cdot 9}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    4. pow1/299.6%

      \[\leadsto \color{blue}{{\left(x \cdot 9\right)}^{0.5}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
  5. Applied egg-rr99.6%

    \[\leadsto \color{blue}{{\left(x \cdot 9\right)}^{0.5}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
  6. Step-by-step derivation
    1. unpow1/299.6%

      \[\leadsto \color{blue}{\sqrt{x \cdot 9}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
  7. Simplified99.6%

    \[\leadsto \color{blue}{\sqrt{x \cdot 9}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
  8. Final simplification99.6%

    \[\leadsto \sqrt{x \cdot 9} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]

Alternative 2: 86.5% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -9500 \lor \neg \left(y \leq 1200000000\right):\\ \;\;\;\;\sqrt{x \cdot 9} \cdot y\\ \mathbf{else}:\\ \;\;\;\;\sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + -3\right)\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (or (<= y -9500.0) (not (<= y 1200000000.0)))
   (* (sqrt (* x 9.0)) y)
   (* (sqrt x) (+ (/ 0.3333333333333333 x) -3.0))))
double code(double x, double y) {
	double tmp;
	if ((y <= -9500.0) || !(y <= 1200000000.0)) {
		tmp = sqrt((x * 9.0)) * y;
	} else {
		tmp = sqrt(x) * ((0.3333333333333333 / x) + -3.0);
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if ((y <= (-9500.0d0)) .or. (.not. (y <= 1200000000.0d0))) then
        tmp = sqrt((x * 9.0d0)) * y
    else
        tmp = sqrt(x) * ((0.3333333333333333d0 / x) + (-3.0d0))
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if ((y <= -9500.0) || !(y <= 1200000000.0)) {
		tmp = Math.sqrt((x * 9.0)) * y;
	} else {
		tmp = Math.sqrt(x) * ((0.3333333333333333 / x) + -3.0);
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if (y <= -9500.0) or not (y <= 1200000000.0):
		tmp = math.sqrt((x * 9.0)) * y
	else:
		tmp = math.sqrt(x) * ((0.3333333333333333 / x) + -3.0)
	return tmp
function code(x, y)
	tmp = 0.0
	if ((y <= -9500.0) || !(y <= 1200000000.0))
		tmp = Float64(sqrt(Float64(x * 9.0)) * y);
	else
		tmp = Float64(sqrt(x) * Float64(Float64(0.3333333333333333 / x) + -3.0));
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if ((y <= -9500.0) || ~((y <= 1200000000.0)))
		tmp = sqrt((x * 9.0)) * y;
	else
		tmp = sqrt(x) * ((0.3333333333333333 / x) + -3.0);
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[Or[LessEqual[y, -9500.0], N[Not[LessEqual[y, 1200000000.0]], $MachinePrecision]], N[(N[Sqrt[N[(x * 9.0), $MachinePrecision]], $MachinePrecision] * y), $MachinePrecision], N[(N[Sqrt[x], $MachinePrecision] * N[(N[(0.3333333333333333 / x), $MachinePrecision] + -3.0), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -9500 \lor \neg \left(y \leq 1200000000\right):\\
\;\;\;\;\sqrt{x \cdot 9} \cdot y\\

\mathbf{else}:\\
\;\;\;\;\sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + -3\right)\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -9500 or 1.2e9 < y

    1. Initial program 99.4%

      \[\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
    2. Step-by-step derivation
      1. associate--l+99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \color{blue}{\left(y + \left(\frac{1}{x \cdot 9} - 1\right)\right)} \]
      2. sub-neg99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \color{blue}{\left(\frac{1}{x \cdot 9} + \left(-1\right)\right)}\right) \]
      3. *-commutative99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{1}{\color{blue}{9 \cdot x}} + \left(-1\right)\right)\right) \]
      4. associate-/r*99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\color{blue}{\frac{\frac{1}{9}}{x}} + \left(-1\right)\right)\right) \]
      5. metadata-eval99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{\color{blue}{0.1111111111111111}}{x} + \left(-1\right)\right)\right) \]
      6. metadata-eval99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{0.1111111111111111}{x} + \color{blue}{-1}\right)\right) \]
    3. Simplified99.4%

      \[\leadsto \color{blue}{\left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right)} \]
    4. Step-by-step derivation
      1. *-commutative99.4%

        \[\leadsto \color{blue}{\left(\sqrt{x} \cdot 3\right)} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
      2. metadata-eval99.4%

        \[\leadsto \left(\sqrt{x} \cdot \color{blue}{\sqrt{9}}\right) \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
      3. sqrt-prod99.6%

        \[\leadsto \color{blue}{\sqrt{x \cdot 9}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
      4. pow1/299.6%

        \[\leadsto \color{blue}{{\left(x \cdot 9\right)}^{0.5}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    5. Applied egg-rr99.6%

      \[\leadsto \color{blue}{{\left(x \cdot 9\right)}^{0.5}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    6. Step-by-step derivation
      1. unpow1/299.6%

        \[\leadsto \color{blue}{\sqrt{x \cdot 9}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    7. Simplified99.6%

      \[\leadsto \color{blue}{\sqrt{x \cdot 9}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    8. Taylor expanded in y around inf 81.0%

      \[\leadsto \sqrt{x \cdot 9} \cdot \color{blue}{y} \]

    if -9500 < y < 1.2e9

    1. Initial program 99.4%

      \[\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
    2. Step-by-step derivation
      1. *-commutative99.4%

        \[\leadsto \color{blue}{\left(\sqrt{x} \cdot 3\right)} \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
      2. associate-*l*99.4%

        \[\leadsto \color{blue}{\sqrt{x} \cdot \left(3 \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right)\right)} \]
      3. +-commutative99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \left(\color{blue}{\left(\frac{1}{x \cdot 9} + y\right)} - 1\right)\right) \]
      4. associate--l+99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \color{blue}{\left(\frac{1}{x \cdot 9} + \left(y - 1\right)\right)}\right) \]
      5. +-commutative99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \color{blue}{\left(\left(y - 1\right) + \frac{1}{x \cdot 9}\right)}\right) \]
      6. distribute-lft-in99.4%

        \[\leadsto \sqrt{x} \cdot \color{blue}{\left(3 \cdot \left(y - 1\right) + 3 \cdot \frac{1}{x \cdot 9}\right)} \]
      7. sub-neg99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \color{blue}{\left(y + \left(-1\right)\right)} + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      8. distribute-lft-in99.5%

        \[\leadsto \sqrt{x} \cdot \left(\color{blue}{\left(3 \cdot y + 3 \cdot \left(-1\right)\right)} + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      9. fma-def99.5%

        \[\leadsto \sqrt{x} \cdot \left(\color{blue}{\mathsf{fma}\left(3, y, 3 \cdot \left(-1\right)\right)} + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      10. metadata-eval99.5%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, 3 \cdot \color{blue}{-1}\right) + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      11. metadata-eval99.5%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, \color{blue}{-3}\right) + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      12. *-commutative99.5%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + 3 \cdot \frac{1}{\color{blue}{9 \cdot x}}\right) \]
      13. associate-/r*99.5%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + 3 \cdot \color{blue}{\frac{\frac{1}{9}}{x}}\right) \]
      14. associate-*r/99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \color{blue}{\frac{3 \cdot \frac{1}{9}}{x}}\right) \]
      15. metadata-eval99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \frac{3 \cdot \color{blue}{0.1111111111111111}}{x}\right) \]
      16. metadata-eval99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \frac{\color{blue}{0.3333333333333333}}{x}\right) \]
    3. Simplified99.4%

      \[\leadsto \color{blue}{\sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \frac{0.3333333333333333}{x}\right)} \]
    4. Taylor expanded in y around 0 96.5%

      \[\leadsto \color{blue}{\sqrt{x} \cdot \left(0.3333333333333333 \cdot \frac{1}{x} - 3\right)} \]
    5. Step-by-step derivation
      1. sub-neg96.5%

        \[\leadsto \sqrt{x} \cdot \color{blue}{\left(0.3333333333333333 \cdot \frac{1}{x} + \left(-3\right)\right)} \]
      2. associate-*r/96.5%

        \[\leadsto \sqrt{x} \cdot \left(\color{blue}{\frac{0.3333333333333333 \cdot 1}{x}} + \left(-3\right)\right) \]
      3. metadata-eval96.5%

        \[\leadsto \sqrt{x} \cdot \left(\frac{\color{blue}{0.3333333333333333}}{x} + \left(-3\right)\right) \]
      4. metadata-eval96.5%

        \[\leadsto \sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + \color{blue}{-3}\right) \]
    6. Simplified96.5%

      \[\leadsto \color{blue}{\sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + -3\right)} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification88.5%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -9500 \lor \neg \left(y \leq 1200000000\right):\\ \;\;\;\;\sqrt{x \cdot 9} \cdot y\\ \mathbf{else}:\\ \;\;\;\;\sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + -3\right)\\ \end{array} \]

Alternative 3: 86.4% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -2 \lor \neg \left(y \leq 2.25 \cdot 10^{-12}\right):\\ \;\;\;\;\sqrt{x} \cdot \left(y \cdot 3 - 3\right)\\ \mathbf{else}:\\ \;\;\;\;\sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + -3\right)\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (or (<= y -2.0) (not (<= y 2.25e-12)))
   (* (sqrt x) (- (* y 3.0) 3.0))
   (* (sqrt x) (+ (/ 0.3333333333333333 x) -3.0))))
double code(double x, double y) {
	double tmp;
	if ((y <= -2.0) || !(y <= 2.25e-12)) {
		tmp = sqrt(x) * ((y * 3.0) - 3.0);
	} else {
		tmp = sqrt(x) * ((0.3333333333333333 / x) + -3.0);
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if ((y <= (-2.0d0)) .or. (.not. (y <= 2.25d-12))) then
        tmp = sqrt(x) * ((y * 3.0d0) - 3.0d0)
    else
        tmp = sqrt(x) * ((0.3333333333333333d0 / x) + (-3.0d0))
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if ((y <= -2.0) || !(y <= 2.25e-12)) {
		tmp = Math.sqrt(x) * ((y * 3.0) - 3.0);
	} else {
		tmp = Math.sqrt(x) * ((0.3333333333333333 / x) + -3.0);
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if (y <= -2.0) or not (y <= 2.25e-12):
		tmp = math.sqrt(x) * ((y * 3.0) - 3.0)
	else:
		tmp = math.sqrt(x) * ((0.3333333333333333 / x) + -3.0)
	return tmp
function code(x, y)
	tmp = 0.0
	if ((y <= -2.0) || !(y <= 2.25e-12))
		tmp = Float64(sqrt(x) * Float64(Float64(y * 3.0) - 3.0));
	else
		tmp = Float64(sqrt(x) * Float64(Float64(0.3333333333333333 / x) + -3.0));
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if ((y <= -2.0) || ~((y <= 2.25e-12)))
		tmp = sqrt(x) * ((y * 3.0) - 3.0);
	else
		tmp = sqrt(x) * ((0.3333333333333333 / x) + -3.0);
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[Or[LessEqual[y, -2.0], N[Not[LessEqual[y, 2.25e-12]], $MachinePrecision]], N[(N[Sqrt[x], $MachinePrecision] * N[(N[(y * 3.0), $MachinePrecision] - 3.0), $MachinePrecision]), $MachinePrecision], N[(N[Sqrt[x], $MachinePrecision] * N[(N[(0.3333333333333333 / x), $MachinePrecision] + -3.0), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -2 \lor \neg \left(y \leq 2.25 \cdot 10^{-12}\right):\\
\;\;\;\;\sqrt{x} \cdot \left(y \cdot 3 - 3\right)\\

\mathbf{else}:\\
\;\;\;\;\sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + -3\right)\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -2 or 2.2499999999999999e-12 < y

    1. Initial program 99.4%

      \[\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
    2. Step-by-step derivation
      1. *-commutative99.4%

        \[\leadsto \color{blue}{\left(\sqrt{x} \cdot 3\right)} \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
      2. associate-*l*99.4%

        \[\leadsto \color{blue}{\sqrt{x} \cdot \left(3 \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right)\right)} \]
      3. +-commutative99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \left(\color{blue}{\left(\frac{1}{x \cdot 9} + y\right)} - 1\right)\right) \]
      4. associate--l+99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \color{blue}{\left(\frac{1}{x \cdot 9} + \left(y - 1\right)\right)}\right) \]
      5. +-commutative99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \color{blue}{\left(\left(y - 1\right) + \frac{1}{x \cdot 9}\right)}\right) \]
      6. distribute-lft-in99.3%

        \[\leadsto \sqrt{x} \cdot \color{blue}{\left(3 \cdot \left(y - 1\right) + 3 \cdot \frac{1}{x \cdot 9}\right)} \]
      7. sub-neg99.3%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \color{blue}{\left(y + \left(-1\right)\right)} + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      8. distribute-lft-in99.4%

        \[\leadsto \sqrt{x} \cdot \left(\color{blue}{\left(3 \cdot y + 3 \cdot \left(-1\right)\right)} + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      9. fma-def99.4%

        \[\leadsto \sqrt{x} \cdot \left(\color{blue}{\mathsf{fma}\left(3, y, 3 \cdot \left(-1\right)\right)} + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      10. metadata-eval99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, 3 \cdot \color{blue}{-1}\right) + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      11. metadata-eval99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, \color{blue}{-3}\right) + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      12. *-commutative99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + 3 \cdot \frac{1}{\color{blue}{9 \cdot x}}\right) \]
      13. associate-/r*99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + 3 \cdot \color{blue}{\frac{\frac{1}{9}}{x}}\right) \]
      14. associate-*r/99.5%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \color{blue}{\frac{3 \cdot \frac{1}{9}}{x}}\right) \]
      15. metadata-eval99.5%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \frac{3 \cdot \color{blue}{0.1111111111111111}}{x}\right) \]
      16. metadata-eval99.5%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \frac{\color{blue}{0.3333333333333333}}{x}\right) \]
    3. Simplified99.5%

      \[\leadsto \color{blue}{\sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \frac{0.3333333333333333}{x}\right)} \]
    4. Taylor expanded in x around inf 81.0%

      \[\leadsto \sqrt{x} \cdot \color{blue}{\left(3 \cdot y - 3\right)} \]

    if -2 < y < 2.2499999999999999e-12

    1. Initial program 99.4%

      \[\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
    2. Step-by-step derivation
      1. *-commutative99.4%

        \[\leadsto \color{blue}{\left(\sqrt{x} \cdot 3\right)} \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
      2. associate-*l*99.4%

        \[\leadsto \color{blue}{\sqrt{x} \cdot \left(3 \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right)\right)} \]
      3. +-commutative99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \left(\color{blue}{\left(\frac{1}{x \cdot 9} + y\right)} - 1\right)\right) \]
      4. associate--l+99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \color{blue}{\left(\frac{1}{x \cdot 9} + \left(y - 1\right)\right)}\right) \]
      5. +-commutative99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \color{blue}{\left(\left(y - 1\right) + \frac{1}{x \cdot 9}\right)}\right) \]
      6. distribute-lft-in99.4%

        \[\leadsto \sqrt{x} \cdot \color{blue}{\left(3 \cdot \left(y - 1\right) + 3 \cdot \frac{1}{x \cdot 9}\right)} \]
      7. sub-neg99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \color{blue}{\left(y + \left(-1\right)\right)} + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      8. distribute-lft-in99.5%

        \[\leadsto \sqrt{x} \cdot \left(\color{blue}{\left(3 \cdot y + 3 \cdot \left(-1\right)\right)} + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      9. fma-def99.5%

        \[\leadsto \sqrt{x} \cdot \left(\color{blue}{\mathsf{fma}\left(3, y, 3 \cdot \left(-1\right)\right)} + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      10. metadata-eval99.5%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, 3 \cdot \color{blue}{-1}\right) + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      11. metadata-eval99.5%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, \color{blue}{-3}\right) + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      12. *-commutative99.5%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + 3 \cdot \frac{1}{\color{blue}{9 \cdot x}}\right) \]
      13. associate-/r*99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + 3 \cdot \color{blue}{\frac{\frac{1}{9}}{x}}\right) \]
      14. associate-*r/99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \color{blue}{\frac{3 \cdot \frac{1}{9}}{x}}\right) \]
      15. metadata-eval99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \frac{3 \cdot \color{blue}{0.1111111111111111}}{x}\right) \]
      16. metadata-eval99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \frac{\color{blue}{0.3333333333333333}}{x}\right) \]
    3. Simplified99.4%

      \[\leadsto \color{blue}{\sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \frac{0.3333333333333333}{x}\right)} \]
    4. Taylor expanded in y around 0 98.4%

      \[\leadsto \color{blue}{\sqrt{x} \cdot \left(0.3333333333333333 \cdot \frac{1}{x} - 3\right)} \]
    5. Step-by-step derivation
      1. sub-neg98.4%

        \[\leadsto \sqrt{x} \cdot \color{blue}{\left(0.3333333333333333 \cdot \frac{1}{x} + \left(-3\right)\right)} \]
      2. associate-*r/98.4%

        \[\leadsto \sqrt{x} \cdot \left(\color{blue}{\frac{0.3333333333333333 \cdot 1}{x}} + \left(-3\right)\right) \]
      3. metadata-eval98.4%

        \[\leadsto \sqrt{x} \cdot \left(\frac{\color{blue}{0.3333333333333333}}{x} + \left(-3\right)\right) \]
      4. metadata-eval98.4%

        \[\leadsto \sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + \color{blue}{-3}\right) \]
    6. Simplified98.4%

      \[\leadsto \color{blue}{\sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + -3\right)} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification89.0%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -2 \lor \neg \left(y \leq 2.25 \cdot 10^{-12}\right):\\ \;\;\;\;\sqrt{x} \cdot \left(y \cdot 3 - 3\right)\\ \mathbf{else}:\\ \;\;\;\;\sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + -3\right)\\ \end{array} \]

Alternative 4: 86.4% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -210 \lor \neg \left(y \leq 2.25 \cdot 10^{-12}\right):\\ \;\;\;\;\sqrt{x \cdot 9} \cdot \left(y + -1\right)\\ \mathbf{else}:\\ \;\;\;\;\sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + -3\right)\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (or (<= y -210.0) (not (<= y 2.25e-12)))
   (* (sqrt (* x 9.0)) (+ y -1.0))
   (* (sqrt x) (+ (/ 0.3333333333333333 x) -3.0))))
double code(double x, double y) {
	double tmp;
	if ((y <= -210.0) || !(y <= 2.25e-12)) {
		tmp = sqrt((x * 9.0)) * (y + -1.0);
	} else {
		tmp = sqrt(x) * ((0.3333333333333333 / x) + -3.0);
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if ((y <= (-210.0d0)) .or. (.not. (y <= 2.25d-12))) then
        tmp = sqrt((x * 9.0d0)) * (y + (-1.0d0))
    else
        tmp = sqrt(x) * ((0.3333333333333333d0 / x) + (-3.0d0))
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if ((y <= -210.0) || !(y <= 2.25e-12)) {
		tmp = Math.sqrt((x * 9.0)) * (y + -1.0);
	} else {
		tmp = Math.sqrt(x) * ((0.3333333333333333 / x) + -3.0);
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if (y <= -210.0) or not (y <= 2.25e-12):
		tmp = math.sqrt((x * 9.0)) * (y + -1.0)
	else:
		tmp = math.sqrt(x) * ((0.3333333333333333 / x) + -3.0)
	return tmp
function code(x, y)
	tmp = 0.0
	if ((y <= -210.0) || !(y <= 2.25e-12))
		tmp = Float64(sqrt(Float64(x * 9.0)) * Float64(y + -1.0));
	else
		tmp = Float64(sqrt(x) * Float64(Float64(0.3333333333333333 / x) + -3.0));
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if ((y <= -210.0) || ~((y <= 2.25e-12)))
		tmp = sqrt((x * 9.0)) * (y + -1.0);
	else
		tmp = sqrt(x) * ((0.3333333333333333 / x) + -3.0);
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[Or[LessEqual[y, -210.0], N[Not[LessEqual[y, 2.25e-12]], $MachinePrecision]], N[(N[Sqrt[N[(x * 9.0), $MachinePrecision]], $MachinePrecision] * N[(y + -1.0), $MachinePrecision]), $MachinePrecision], N[(N[Sqrt[x], $MachinePrecision] * N[(N[(0.3333333333333333 / x), $MachinePrecision] + -3.0), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -210 \lor \neg \left(y \leq 2.25 \cdot 10^{-12}\right):\\
\;\;\;\;\sqrt{x \cdot 9} \cdot \left(y + -1\right)\\

\mathbf{else}:\\
\;\;\;\;\sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + -3\right)\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -210 or 2.2499999999999999e-12 < y

    1. Initial program 99.4%

      \[\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
    2. Step-by-step derivation
      1. associate--l+99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \color{blue}{\left(y + \left(\frac{1}{x \cdot 9} - 1\right)\right)} \]
      2. sub-neg99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \color{blue}{\left(\frac{1}{x \cdot 9} + \left(-1\right)\right)}\right) \]
      3. *-commutative99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{1}{\color{blue}{9 \cdot x}} + \left(-1\right)\right)\right) \]
      4. associate-/r*99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\color{blue}{\frac{\frac{1}{9}}{x}} + \left(-1\right)\right)\right) \]
      5. metadata-eval99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{\color{blue}{0.1111111111111111}}{x} + \left(-1\right)\right)\right) \]
      6. metadata-eval99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{0.1111111111111111}{x} + \color{blue}{-1}\right)\right) \]
    3. Simplified99.4%

      \[\leadsto \color{blue}{\left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right)} \]
    4. Step-by-step derivation
      1. *-commutative99.4%

        \[\leadsto \color{blue}{\left(\sqrt{x} \cdot 3\right)} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
      2. metadata-eval99.4%

        \[\leadsto \left(\sqrt{x} \cdot \color{blue}{\sqrt{9}}\right) \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
      3. sqrt-prod99.6%

        \[\leadsto \color{blue}{\sqrt{x \cdot 9}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
      4. pow1/299.6%

        \[\leadsto \color{blue}{{\left(x \cdot 9\right)}^{0.5}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    5. Applied egg-rr99.6%

      \[\leadsto \color{blue}{{\left(x \cdot 9\right)}^{0.5}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    6. Step-by-step derivation
      1. unpow1/299.6%

        \[\leadsto \color{blue}{\sqrt{x \cdot 9}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    7. Simplified99.6%

      \[\leadsto \color{blue}{\sqrt{x \cdot 9}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    8. Taylor expanded in x around inf 81.2%

      \[\leadsto \sqrt{x \cdot 9} \cdot \color{blue}{\left(y - 1\right)} \]

    if -210 < y < 2.2499999999999999e-12

    1. Initial program 99.4%

      \[\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
    2. Step-by-step derivation
      1. *-commutative99.4%

        \[\leadsto \color{blue}{\left(\sqrt{x} \cdot 3\right)} \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
      2. associate-*l*99.4%

        \[\leadsto \color{blue}{\sqrt{x} \cdot \left(3 \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right)\right)} \]
      3. +-commutative99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \left(\color{blue}{\left(\frac{1}{x \cdot 9} + y\right)} - 1\right)\right) \]
      4. associate--l+99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \color{blue}{\left(\frac{1}{x \cdot 9} + \left(y - 1\right)\right)}\right) \]
      5. +-commutative99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \color{blue}{\left(\left(y - 1\right) + \frac{1}{x \cdot 9}\right)}\right) \]
      6. distribute-lft-in99.4%

        \[\leadsto \sqrt{x} \cdot \color{blue}{\left(3 \cdot \left(y - 1\right) + 3 \cdot \frac{1}{x \cdot 9}\right)} \]
      7. sub-neg99.4%

        \[\leadsto \sqrt{x} \cdot \left(3 \cdot \color{blue}{\left(y + \left(-1\right)\right)} + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      8. distribute-lft-in99.5%

        \[\leadsto \sqrt{x} \cdot \left(\color{blue}{\left(3 \cdot y + 3 \cdot \left(-1\right)\right)} + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      9. fma-def99.5%

        \[\leadsto \sqrt{x} \cdot \left(\color{blue}{\mathsf{fma}\left(3, y, 3 \cdot \left(-1\right)\right)} + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      10. metadata-eval99.5%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, 3 \cdot \color{blue}{-1}\right) + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      11. metadata-eval99.5%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, \color{blue}{-3}\right) + 3 \cdot \frac{1}{x \cdot 9}\right) \]
      12. *-commutative99.5%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + 3 \cdot \frac{1}{\color{blue}{9 \cdot x}}\right) \]
      13. associate-/r*99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + 3 \cdot \color{blue}{\frac{\frac{1}{9}}{x}}\right) \]
      14. associate-*r/99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \color{blue}{\frac{3 \cdot \frac{1}{9}}{x}}\right) \]
      15. metadata-eval99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \frac{3 \cdot \color{blue}{0.1111111111111111}}{x}\right) \]
      16. metadata-eval99.4%

        \[\leadsto \sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \frac{\color{blue}{0.3333333333333333}}{x}\right) \]
    3. Simplified99.4%

      \[\leadsto \color{blue}{\sqrt{x} \cdot \left(\mathsf{fma}\left(3, y, -3\right) + \frac{0.3333333333333333}{x}\right)} \]
    4. Taylor expanded in y around 0 98.4%

      \[\leadsto \color{blue}{\sqrt{x} \cdot \left(0.3333333333333333 \cdot \frac{1}{x} - 3\right)} \]
    5. Step-by-step derivation
      1. sub-neg98.4%

        \[\leadsto \sqrt{x} \cdot \color{blue}{\left(0.3333333333333333 \cdot \frac{1}{x} + \left(-3\right)\right)} \]
      2. associate-*r/98.4%

        \[\leadsto \sqrt{x} \cdot \left(\color{blue}{\frac{0.3333333333333333 \cdot 1}{x}} + \left(-3\right)\right) \]
      3. metadata-eval98.4%

        \[\leadsto \sqrt{x} \cdot \left(\frac{\color{blue}{0.3333333333333333}}{x} + \left(-3\right)\right) \]
      4. metadata-eval98.4%

        \[\leadsto \sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + \color{blue}{-3}\right) \]
    6. Simplified98.4%

      \[\leadsto \color{blue}{\sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + -3\right)} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification89.1%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -210 \lor \neg \left(y \leq 2.25 \cdot 10^{-12}\right):\\ \;\;\;\;\sqrt{x \cdot 9} \cdot \left(y + -1\right)\\ \mathbf{else}:\\ \;\;\;\;\sqrt{x} \cdot \left(\frac{0.3333333333333333}{x} + -3\right)\\ \end{array} \]

Alternative 5: 99.4% accurate, 1.0× speedup?

\[\begin{array}{l} \\ 3 \cdot \left(\left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \cdot \sqrt{x}\right) \end{array} \]
(FPCore (x y)
 :precision binary64
 (* 3.0 (* (+ y (+ (/ 0.1111111111111111 x) -1.0)) (sqrt x))))
double code(double x, double y) {
	return 3.0 * ((y + ((0.1111111111111111 / x) + -1.0)) * sqrt(x));
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = 3.0d0 * ((y + ((0.1111111111111111d0 / x) + (-1.0d0))) * sqrt(x))
end function
public static double code(double x, double y) {
	return 3.0 * ((y + ((0.1111111111111111 / x) + -1.0)) * Math.sqrt(x));
}
def code(x, y):
	return 3.0 * ((y + ((0.1111111111111111 / x) + -1.0)) * math.sqrt(x))
function code(x, y)
	return Float64(3.0 * Float64(Float64(y + Float64(Float64(0.1111111111111111 / x) + -1.0)) * sqrt(x)))
end
function tmp = code(x, y)
	tmp = 3.0 * ((y + ((0.1111111111111111 / x) + -1.0)) * sqrt(x));
end
code[x_, y_] := N[(3.0 * N[(N[(y + N[(N[(0.1111111111111111 / x), $MachinePrecision] + -1.0), $MachinePrecision]), $MachinePrecision] * N[Sqrt[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
3 \cdot \left(\left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \cdot \sqrt{x}\right)
\end{array}
Derivation
  1. Initial program 99.4%

    \[\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
  2. Step-by-step derivation
    1. associate-*l*99.4%

      \[\leadsto \color{blue}{3 \cdot \left(\sqrt{x} \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right)\right)} \]
    2. associate--l+99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \color{blue}{\left(y + \left(\frac{1}{x \cdot 9} - 1\right)\right)}\right) \]
    3. sub-neg99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \color{blue}{\left(\frac{1}{x \cdot 9} + \left(-1\right)\right)}\right)\right) \]
    4. *-commutative99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{1}{\color{blue}{9 \cdot x}} + \left(-1\right)\right)\right)\right) \]
    5. associate-/r*99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\color{blue}{\frac{\frac{1}{9}}{x}} + \left(-1\right)\right)\right)\right) \]
    6. metadata-eval99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{\color{blue}{0.1111111111111111}}{x} + \left(-1\right)\right)\right)\right) \]
    7. metadata-eval99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + \color{blue}{-1}\right)\right)\right) \]
  3. Simplified99.4%

    \[\leadsto \color{blue}{3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right)\right)} \]
  4. Final simplification99.4%

    \[\leadsto 3 \cdot \left(\left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \cdot \sqrt{x}\right) \]

Alternative 6: 62.2% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -9500 \lor \neg \left(y \leq 1550000000\right):\\ \;\;\;\;3 \cdot \left(y \cdot \sqrt{x}\right)\\ \mathbf{else}:\\ \;\;\;\;\sqrt{\frac{0.1111111111111111}{x}}\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (or (<= y -9500.0) (not (<= y 1550000000.0)))
   (* 3.0 (* y (sqrt x)))
   (sqrt (/ 0.1111111111111111 x))))
double code(double x, double y) {
	double tmp;
	if ((y <= -9500.0) || !(y <= 1550000000.0)) {
		tmp = 3.0 * (y * sqrt(x));
	} else {
		tmp = sqrt((0.1111111111111111 / x));
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if ((y <= (-9500.0d0)) .or. (.not. (y <= 1550000000.0d0))) then
        tmp = 3.0d0 * (y * sqrt(x))
    else
        tmp = sqrt((0.1111111111111111d0 / x))
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if ((y <= -9500.0) || !(y <= 1550000000.0)) {
		tmp = 3.0 * (y * Math.sqrt(x));
	} else {
		tmp = Math.sqrt((0.1111111111111111 / x));
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if (y <= -9500.0) or not (y <= 1550000000.0):
		tmp = 3.0 * (y * math.sqrt(x))
	else:
		tmp = math.sqrt((0.1111111111111111 / x))
	return tmp
function code(x, y)
	tmp = 0.0
	if ((y <= -9500.0) || !(y <= 1550000000.0))
		tmp = Float64(3.0 * Float64(y * sqrt(x)));
	else
		tmp = sqrt(Float64(0.1111111111111111 / x));
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if ((y <= -9500.0) || ~((y <= 1550000000.0)))
		tmp = 3.0 * (y * sqrt(x));
	else
		tmp = sqrt((0.1111111111111111 / x));
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[Or[LessEqual[y, -9500.0], N[Not[LessEqual[y, 1550000000.0]], $MachinePrecision]], N[(3.0 * N[(y * N[Sqrt[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[Sqrt[N[(0.1111111111111111 / x), $MachinePrecision]], $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -9500 \lor \neg \left(y \leq 1550000000\right):\\
\;\;\;\;3 \cdot \left(y \cdot \sqrt{x}\right)\\

\mathbf{else}:\\
\;\;\;\;\sqrt{\frac{0.1111111111111111}{x}}\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -9500 or 1.55e9 < y

    1. Initial program 99.4%

      \[\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
    2. Step-by-step derivation
      1. associate--l+99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \color{blue}{\left(y + \left(\frac{1}{x \cdot 9} - 1\right)\right)} \]
      2. sub-neg99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \color{blue}{\left(\frac{1}{x \cdot 9} + \left(-1\right)\right)}\right) \]
      3. *-commutative99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{1}{\color{blue}{9 \cdot x}} + \left(-1\right)\right)\right) \]
      4. associate-/r*99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\color{blue}{\frac{\frac{1}{9}}{x}} + \left(-1\right)\right)\right) \]
      5. metadata-eval99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{\color{blue}{0.1111111111111111}}{x} + \left(-1\right)\right)\right) \]
      6. metadata-eval99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{0.1111111111111111}{x} + \color{blue}{-1}\right)\right) \]
    3. Simplified99.4%

      \[\leadsto \color{blue}{\left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right)} \]
    4. Taylor expanded in y around inf 80.8%

      \[\leadsto \color{blue}{3 \cdot \left(\sqrt{x} \cdot y\right)} \]

    if -9500 < y < 1.55e9

    1. Initial program 99.4%

      \[\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
    2. Step-by-step derivation
      1. associate-*l*99.3%

        \[\leadsto \color{blue}{3 \cdot \left(\sqrt{x} \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right)\right)} \]
      2. associate--l+99.3%

        \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \color{blue}{\left(y + \left(\frac{1}{x \cdot 9} - 1\right)\right)}\right) \]
      3. sub-neg99.3%

        \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \color{blue}{\left(\frac{1}{x \cdot 9} + \left(-1\right)\right)}\right)\right) \]
      4. *-commutative99.3%

        \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{1}{\color{blue}{9 \cdot x}} + \left(-1\right)\right)\right)\right) \]
      5. associate-/r*99.3%

        \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\color{blue}{\frac{\frac{1}{9}}{x}} + \left(-1\right)\right)\right)\right) \]
      6. metadata-eval99.3%

        \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{\color{blue}{0.1111111111111111}}{x} + \left(-1\right)\right)\right)\right) \]
      7. metadata-eval99.3%

        \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + \color{blue}{-1}\right)\right)\right) \]
    3. Simplified99.3%

      \[\leadsto \color{blue}{3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right)\right)} \]
    4. Taylor expanded in x around 0 49.7%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \color{blue}{\frac{0.1111111111111111}{x}}\right) \]
    5. Step-by-step derivation
      1. associate-*r*49.9%

        \[\leadsto \color{blue}{\left(3 \cdot \sqrt{x}\right) \cdot \frac{0.1111111111111111}{x}} \]
      2. expm1-log1p-u46.6%

        \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(\left(3 \cdot \sqrt{x}\right) \cdot \frac{0.1111111111111111}{x}\right)\right)} \]
      3. expm1-udef47.0%

        \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(\left(3 \cdot \sqrt{x}\right) \cdot \frac{0.1111111111111111}{x}\right)} - 1} \]
      4. associate-*r/47.0%

        \[\leadsto e^{\mathsf{log1p}\left(\color{blue}{\frac{\left(3 \cdot \sqrt{x}\right) \cdot 0.1111111111111111}{x}}\right)} - 1 \]
      5. *-commutative47.0%

        \[\leadsto e^{\mathsf{log1p}\left(\frac{\color{blue}{\left(\sqrt{x} \cdot 3\right)} \cdot 0.1111111111111111}{x}\right)} - 1 \]
      6. associate-*l*47.0%

        \[\leadsto e^{\mathsf{log1p}\left(\frac{\color{blue}{\sqrt{x} \cdot \left(3 \cdot 0.1111111111111111\right)}}{x}\right)} - 1 \]
      7. metadata-eval47.0%

        \[\leadsto e^{\mathsf{log1p}\left(\frac{\sqrt{x} \cdot \color{blue}{0.3333333333333333}}{x}\right)} - 1 \]
    6. Applied egg-rr47.0%

      \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(\frac{\sqrt{x} \cdot 0.3333333333333333}{x}\right)} - 1} \]
    7. Step-by-step derivation
      1. expm1-def46.6%

        \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(\frac{\sqrt{x} \cdot 0.3333333333333333}{x}\right)\right)} \]
      2. expm1-log1p49.7%

        \[\leadsto \color{blue}{\frac{\sqrt{x} \cdot 0.3333333333333333}{x}} \]
      3. rem-square-sqrt49.7%

        \[\leadsto \frac{\sqrt{x} \cdot 0.3333333333333333}{\color{blue}{\sqrt{x} \cdot \sqrt{x}}} \]
      4. associate-/l/49.8%

        \[\leadsto \color{blue}{\frac{\frac{\sqrt{x} \cdot 0.3333333333333333}{\sqrt{x}}}{\sqrt{x}}} \]
      5. *-commutative49.8%

        \[\leadsto \frac{\frac{\color{blue}{0.3333333333333333 \cdot \sqrt{x}}}{\sqrt{x}}}{\sqrt{x}} \]
      6. associate-/l*49.9%

        \[\leadsto \frac{\color{blue}{\frac{0.3333333333333333}{\frac{\sqrt{x}}{\sqrt{x}}}}}{\sqrt{x}} \]
      7. *-inverses49.9%

        \[\leadsto \frac{\frac{0.3333333333333333}{\color{blue}{1}}}{\sqrt{x}} \]
      8. metadata-eval49.9%

        \[\leadsto \frac{\color{blue}{0.3333333333333333}}{\sqrt{x}} \]
    8. Simplified49.9%

      \[\leadsto \color{blue}{\frac{0.3333333333333333}{\sqrt{x}}} \]
    9. Step-by-step derivation
      1. metadata-eval49.9%

        \[\leadsto \frac{\color{blue}{\sqrt{0.1111111111111111}}}{\sqrt{x}} \]
      2. sqrt-div50.1%

        \[\leadsto \color{blue}{\sqrt{\frac{0.1111111111111111}{x}}} \]
    10. Applied egg-rr50.1%

      \[\leadsto \color{blue}{\sqrt{\frac{0.1111111111111111}{x}}} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification65.9%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -9500 \lor \neg \left(y \leq 1550000000\right):\\ \;\;\;\;3 \cdot \left(y \cdot \sqrt{x}\right)\\ \mathbf{else}:\\ \;\;\;\;\sqrt{\frac{0.1111111111111111}{x}}\\ \end{array} \]

Alternative 7: 62.2% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -9500 \lor \neg \left(y \leq 1650000000000\right):\\ \;\;\;\;\sqrt{x \cdot 9} \cdot y\\ \mathbf{else}:\\ \;\;\;\;\sqrt{\frac{0.1111111111111111}{x}}\\ \end{array} \end{array} \]
(FPCore (x y)
 :precision binary64
 (if (or (<= y -9500.0) (not (<= y 1650000000000.0)))
   (* (sqrt (* x 9.0)) y)
   (sqrt (/ 0.1111111111111111 x))))
double code(double x, double y) {
	double tmp;
	if ((y <= -9500.0) || !(y <= 1650000000000.0)) {
		tmp = sqrt((x * 9.0)) * y;
	} else {
		tmp = sqrt((0.1111111111111111 / x));
	}
	return tmp;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8) :: tmp
    if ((y <= (-9500.0d0)) .or. (.not. (y <= 1650000000000.0d0))) then
        tmp = sqrt((x * 9.0d0)) * y
    else
        tmp = sqrt((0.1111111111111111d0 / x))
    end if
    code = tmp
end function
public static double code(double x, double y) {
	double tmp;
	if ((y <= -9500.0) || !(y <= 1650000000000.0)) {
		tmp = Math.sqrt((x * 9.0)) * y;
	} else {
		tmp = Math.sqrt((0.1111111111111111 / x));
	}
	return tmp;
}
def code(x, y):
	tmp = 0
	if (y <= -9500.0) or not (y <= 1650000000000.0):
		tmp = math.sqrt((x * 9.0)) * y
	else:
		tmp = math.sqrt((0.1111111111111111 / x))
	return tmp
function code(x, y)
	tmp = 0.0
	if ((y <= -9500.0) || !(y <= 1650000000000.0))
		tmp = Float64(sqrt(Float64(x * 9.0)) * y);
	else
		tmp = sqrt(Float64(0.1111111111111111 / x));
	end
	return tmp
end
function tmp_2 = code(x, y)
	tmp = 0.0;
	if ((y <= -9500.0) || ~((y <= 1650000000000.0)))
		tmp = sqrt((x * 9.0)) * y;
	else
		tmp = sqrt((0.1111111111111111 / x));
	end
	tmp_2 = tmp;
end
code[x_, y_] := If[Or[LessEqual[y, -9500.0], N[Not[LessEqual[y, 1650000000000.0]], $MachinePrecision]], N[(N[Sqrt[N[(x * 9.0), $MachinePrecision]], $MachinePrecision] * y), $MachinePrecision], N[Sqrt[N[(0.1111111111111111 / x), $MachinePrecision]], $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -9500 \lor \neg \left(y \leq 1650000000000\right):\\
\;\;\;\;\sqrt{x \cdot 9} \cdot y\\

\mathbf{else}:\\
\;\;\;\;\sqrt{\frac{0.1111111111111111}{x}}\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -9500 or 1.65e12 < y

    1. Initial program 99.4%

      \[\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
    2. Step-by-step derivation
      1. associate--l+99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \color{blue}{\left(y + \left(\frac{1}{x \cdot 9} - 1\right)\right)} \]
      2. sub-neg99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \color{blue}{\left(\frac{1}{x \cdot 9} + \left(-1\right)\right)}\right) \]
      3. *-commutative99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{1}{\color{blue}{9 \cdot x}} + \left(-1\right)\right)\right) \]
      4. associate-/r*99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\color{blue}{\frac{\frac{1}{9}}{x}} + \left(-1\right)\right)\right) \]
      5. metadata-eval99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{\color{blue}{0.1111111111111111}}{x} + \left(-1\right)\right)\right) \]
      6. metadata-eval99.4%

        \[\leadsto \left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{0.1111111111111111}{x} + \color{blue}{-1}\right)\right) \]
    3. Simplified99.4%

      \[\leadsto \color{blue}{\left(3 \cdot \sqrt{x}\right) \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right)} \]
    4. Step-by-step derivation
      1. *-commutative99.4%

        \[\leadsto \color{blue}{\left(\sqrt{x} \cdot 3\right)} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
      2. metadata-eval99.4%

        \[\leadsto \left(\sqrt{x} \cdot \color{blue}{\sqrt{9}}\right) \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
      3. sqrt-prod99.6%

        \[\leadsto \color{blue}{\sqrt{x \cdot 9}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
      4. pow1/299.6%

        \[\leadsto \color{blue}{{\left(x \cdot 9\right)}^{0.5}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    5. Applied egg-rr99.6%

      \[\leadsto \color{blue}{{\left(x \cdot 9\right)}^{0.5}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    6. Step-by-step derivation
      1. unpow1/299.6%

        \[\leadsto \color{blue}{\sqrt{x \cdot 9}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    7. Simplified99.6%

      \[\leadsto \color{blue}{\sqrt{x \cdot 9}} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right) \]
    8. Taylor expanded in y around inf 81.0%

      \[\leadsto \sqrt{x \cdot 9} \cdot \color{blue}{y} \]

    if -9500 < y < 1.65e12

    1. Initial program 99.4%

      \[\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
    2. Step-by-step derivation
      1. associate-*l*99.3%

        \[\leadsto \color{blue}{3 \cdot \left(\sqrt{x} \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right)\right)} \]
      2. associate--l+99.3%

        \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \color{blue}{\left(y + \left(\frac{1}{x \cdot 9} - 1\right)\right)}\right) \]
      3. sub-neg99.3%

        \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \color{blue}{\left(\frac{1}{x \cdot 9} + \left(-1\right)\right)}\right)\right) \]
      4. *-commutative99.3%

        \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{1}{\color{blue}{9 \cdot x}} + \left(-1\right)\right)\right)\right) \]
      5. associate-/r*99.3%

        \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\color{blue}{\frac{\frac{1}{9}}{x}} + \left(-1\right)\right)\right)\right) \]
      6. metadata-eval99.3%

        \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{\color{blue}{0.1111111111111111}}{x} + \left(-1\right)\right)\right)\right) \]
      7. metadata-eval99.3%

        \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + \color{blue}{-1}\right)\right)\right) \]
    3. Simplified99.3%

      \[\leadsto \color{blue}{3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right)\right)} \]
    4. Taylor expanded in x around 0 49.7%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \color{blue}{\frac{0.1111111111111111}{x}}\right) \]
    5. Step-by-step derivation
      1. associate-*r*49.9%

        \[\leadsto \color{blue}{\left(3 \cdot \sqrt{x}\right) \cdot \frac{0.1111111111111111}{x}} \]
      2. expm1-log1p-u46.6%

        \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(\left(3 \cdot \sqrt{x}\right) \cdot \frac{0.1111111111111111}{x}\right)\right)} \]
      3. expm1-udef47.0%

        \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(\left(3 \cdot \sqrt{x}\right) \cdot \frac{0.1111111111111111}{x}\right)} - 1} \]
      4. associate-*r/47.0%

        \[\leadsto e^{\mathsf{log1p}\left(\color{blue}{\frac{\left(3 \cdot \sqrt{x}\right) \cdot 0.1111111111111111}{x}}\right)} - 1 \]
      5. *-commutative47.0%

        \[\leadsto e^{\mathsf{log1p}\left(\frac{\color{blue}{\left(\sqrt{x} \cdot 3\right)} \cdot 0.1111111111111111}{x}\right)} - 1 \]
      6. associate-*l*47.0%

        \[\leadsto e^{\mathsf{log1p}\left(\frac{\color{blue}{\sqrt{x} \cdot \left(3 \cdot 0.1111111111111111\right)}}{x}\right)} - 1 \]
      7. metadata-eval47.0%

        \[\leadsto e^{\mathsf{log1p}\left(\frac{\sqrt{x} \cdot \color{blue}{0.3333333333333333}}{x}\right)} - 1 \]
    6. Applied egg-rr47.0%

      \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(\frac{\sqrt{x} \cdot 0.3333333333333333}{x}\right)} - 1} \]
    7. Step-by-step derivation
      1. expm1-def46.6%

        \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(\frac{\sqrt{x} \cdot 0.3333333333333333}{x}\right)\right)} \]
      2. expm1-log1p49.7%

        \[\leadsto \color{blue}{\frac{\sqrt{x} \cdot 0.3333333333333333}{x}} \]
      3. rem-square-sqrt49.7%

        \[\leadsto \frac{\sqrt{x} \cdot 0.3333333333333333}{\color{blue}{\sqrt{x} \cdot \sqrt{x}}} \]
      4. associate-/l/49.8%

        \[\leadsto \color{blue}{\frac{\frac{\sqrt{x} \cdot 0.3333333333333333}{\sqrt{x}}}{\sqrt{x}}} \]
      5. *-commutative49.8%

        \[\leadsto \frac{\frac{\color{blue}{0.3333333333333333 \cdot \sqrt{x}}}{\sqrt{x}}}{\sqrt{x}} \]
      6. associate-/l*49.9%

        \[\leadsto \frac{\color{blue}{\frac{0.3333333333333333}{\frac{\sqrt{x}}{\sqrt{x}}}}}{\sqrt{x}} \]
      7. *-inverses49.9%

        \[\leadsto \frac{\frac{0.3333333333333333}{\color{blue}{1}}}{\sqrt{x}} \]
      8. metadata-eval49.9%

        \[\leadsto \frac{\color{blue}{0.3333333333333333}}{\sqrt{x}} \]
    8. Simplified49.9%

      \[\leadsto \color{blue}{\frac{0.3333333333333333}{\sqrt{x}}} \]
    9. Step-by-step derivation
      1. metadata-eval49.9%

        \[\leadsto \frac{\color{blue}{\sqrt{0.1111111111111111}}}{\sqrt{x}} \]
      2. sqrt-div50.1%

        \[\leadsto \color{blue}{\sqrt{\frac{0.1111111111111111}{x}}} \]
    10. Applied egg-rr50.1%

      \[\leadsto \color{blue}{\sqrt{\frac{0.1111111111111111}{x}}} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification66.0%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -9500 \lor \neg \left(y \leq 1650000000000\right):\\ \;\;\;\;\sqrt{x \cdot 9} \cdot y\\ \mathbf{else}:\\ \;\;\;\;\sqrt{\frac{0.1111111111111111}{x}}\\ \end{array} \]

Alternative 8: 38.1% accurate, 1.1× speedup?

\[\begin{array}{l} \\ {\left(x \cdot 9\right)}^{-0.5} \end{array} \]
(FPCore (x y) :precision binary64 (pow (* x 9.0) -0.5))
double code(double x, double y) {
	return pow((x * 9.0), -0.5);
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = (x * 9.0d0) ** (-0.5d0)
end function
public static double code(double x, double y) {
	return Math.pow((x * 9.0), -0.5);
}
def code(x, y):
	return math.pow((x * 9.0), -0.5)
function code(x, y)
	return Float64(x * 9.0) ^ -0.5
end
function tmp = code(x, y)
	tmp = (x * 9.0) ^ -0.5;
end
code[x_, y_] := N[Power[N[(x * 9.0), $MachinePrecision], -0.5], $MachinePrecision]
\begin{array}{l}

\\
{\left(x \cdot 9\right)}^{-0.5}
\end{array}
Derivation
  1. Initial program 99.4%

    \[\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
  2. Step-by-step derivation
    1. associate-*l*99.4%

      \[\leadsto \color{blue}{3 \cdot \left(\sqrt{x} \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right)\right)} \]
    2. associate--l+99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \color{blue}{\left(y + \left(\frac{1}{x \cdot 9} - 1\right)\right)}\right) \]
    3. sub-neg99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \color{blue}{\left(\frac{1}{x \cdot 9} + \left(-1\right)\right)}\right)\right) \]
    4. *-commutative99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{1}{\color{blue}{9 \cdot x}} + \left(-1\right)\right)\right)\right) \]
    5. associate-/r*99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\color{blue}{\frac{\frac{1}{9}}{x}} + \left(-1\right)\right)\right)\right) \]
    6. metadata-eval99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{\color{blue}{0.1111111111111111}}{x} + \left(-1\right)\right)\right)\right) \]
    7. metadata-eval99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + \color{blue}{-1}\right)\right)\right) \]
  3. Simplified99.4%

    \[\leadsto \color{blue}{3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right)\right)} \]
  4. Taylor expanded in x around 0 33.8%

    \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \color{blue}{\frac{0.1111111111111111}{x}}\right) \]
  5. Step-by-step derivation
    1. associate-*r*33.9%

      \[\leadsto \color{blue}{\left(3 \cdot \sqrt{x}\right) \cdot \frac{0.1111111111111111}{x}} \]
    2. expm1-log1p-u31.7%

      \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(\left(3 \cdot \sqrt{x}\right) \cdot \frac{0.1111111111111111}{x}\right)\right)} \]
    3. expm1-udef31.9%

      \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(\left(3 \cdot \sqrt{x}\right) \cdot \frac{0.1111111111111111}{x}\right)} - 1} \]
    4. associate-*r/31.9%

      \[\leadsto e^{\mathsf{log1p}\left(\color{blue}{\frac{\left(3 \cdot \sqrt{x}\right) \cdot 0.1111111111111111}{x}}\right)} - 1 \]
    5. *-commutative31.9%

      \[\leadsto e^{\mathsf{log1p}\left(\frac{\color{blue}{\left(\sqrt{x} \cdot 3\right)} \cdot 0.1111111111111111}{x}\right)} - 1 \]
    6. associate-*l*31.9%

      \[\leadsto e^{\mathsf{log1p}\left(\frac{\color{blue}{\sqrt{x} \cdot \left(3 \cdot 0.1111111111111111\right)}}{x}\right)} - 1 \]
    7. metadata-eval31.9%

      \[\leadsto e^{\mathsf{log1p}\left(\frac{\sqrt{x} \cdot \color{blue}{0.3333333333333333}}{x}\right)} - 1 \]
  6. Applied egg-rr31.9%

    \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(\frac{\sqrt{x} \cdot 0.3333333333333333}{x}\right)} - 1} \]
  7. Step-by-step derivation
    1. expm1-def31.7%

      \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(\frac{\sqrt{x} \cdot 0.3333333333333333}{x}\right)\right)} \]
    2. expm1-log1p33.8%

      \[\leadsto \color{blue}{\frac{\sqrt{x} \cdot 0.3333333333333333}{x}} \]
    3. rem-square-sqrt33.8%

      \[\leadsto \frac{\sqrt{x} \cdot 0.3333333333333333}{\color{blue}{\sqrt{x} \cdot \sqrt{x}}} \]
    4. associate-/l/33.9%

      \[\leadsto \color{blue}{\frac{\frac{\sqrt{x} \cdot 0.3333333333333333}{\sqrt{x}}}{\sqrt{x}}} \]
    5. *-commutative33.9%

      \[\leadsto \frac{\frac{\color{blue}{0.3333333333333333 \cdot \sqrt{x}}}{\sqrt{x}}}{\sqrt{x}} \]
    6. associate-/l*33.9%

      \[\leadsto \frac{\color{blue}{\frac{0.3333333333333333}{\frac{\sqrt{x}}{\sqrt{x}}}}}{\sqrt{x}} \]
    7. *-inverses33.9%

      \[\leadsto \frac{\frac{0.3333333333333333}{\color{blue}{1}}}{\sqrt{x}} \]
    8. metadata-eval33.9%

      \[\leadsto \frac{\color{blue}{0.3333333333333333}}{\sqrt{x}} \]
  8. Simplified33.9%

    \[\leadsto \color{blue}{\frac{0.3333333333333333}{\sqrt{x}}} \]
  9. Step-by-step derivation
    1. clear-num33.9%

      \[\leadsto \color{blue}{\frac{1}{\frac{\sqrt{x}}{0.3333333333333333}}} \]
    2. div-inv33.9%

      \[\leadsto \frac{1}{\color{blue}{\sqrt{x} \cdot \frac{1}{0.3333333333333333}}} \]
    3. metadata-eval33.9%

      \[\leadsto \frac{1}{\sqrt{x} \cdot \color{blue}{3}} \]
    4. metadata-eval33.9%

      \[\leadsto \frac{1}{\sqrt{x} \cdot \color{blue}{\sqrt{9}}} \]
    5. sqrt-prod33.9%

      \[\leadsto \frac{1}{\color{blue}{\sqrt{x \cdot 9}}} \]
    6. pow1/233.9%

      \[\leadsto \frac{1}{\color{blue}{{\left(x \cdot 9\right)}^{0.5}}} \]
    7. metadata-eval33.9%

      \[\leadsto \frac{1}{{\left(x \cdot 9\right)}^{\color{blue}{\left(1 - 0.5\right)}}} \]
    8. pow-div33.9%

      \[\leadsto \frac{1}{\color{blue}{\frac{{\left(x \cdot 9\right)}^{1}}{{\left(x \cdot 9\right)}^{0.5}}}} \]
    9. pow133.9%

      \[\leadsto \frac{1}{\frac{\color{blue}{x \cdot 9}}{{\left(x \cdot 9\right)}^{0.5}}} \]
    10. pow1/233.9%

      \[\leadsto \frac{1}{\frac{x \cdot 9}{\color{blue}{\sqrt{x \cdot 9}}}} \]
    11. sqrt-prod33.8%

      \[\leadsto \frac{1}{\frac{x \cdot 9}{\color{blue}{\sqrt{x} \cdot \sqrt{9}}}} \]
    12. metadata-eval33.8%

      \[\leadsto \frac{1}{\frac{x \cdot 9}{\sqrt{x} \cdot \color{blue}{3}}} \]
    13. *-commutative33.8%

      \[\leadsto \frac{1}{\frac{x \cdot 9}{\color{blue}{3 \cdot \sqrt{x}}}} \]
    14. clear-num33.9%

      \[\leadsto \color{blue}{\frac{3 \cdot \sqrt{x}}{x \cdot 9}} \]
    15. *-commutative33.9%

      \[\leadsto \frac{\color{blue}{\sqrt{x} \cdot 3}}{x \cdot 9} \]
    16. metadata-eval33.9%

      \[\leadsto \frac{\sqrt{x} \cdot \color{blue}{\sqrt{9}}}{x \cdot 9} \]
    17. sqrt-prod34.0%

      \[\leadsto \frac{\color{blue}{\sqrt{x \cdot 9}}}{x \cdot 9} \]
    18. pow1/234.0%

      \[\leadsto \frac{\color{blue}{{\left(x \cdot 9\right)}^{0.5}}}{x \cdot 9} \]
    19. pow134.0%

      \[\leadsto \frac{{\left(x \cdot 9\right)}^{0.5}}{\color{blue}{{\left(x \cdot 9\right)}^{1}}} \]
    20. pow-div34.0%

      \[\leadsto \color{blue}{{\left(x \cdot 9\right)}^{\left(0.5 - 1\right)}} \]
    21. metadata-eval34.0%

      \[\leadsto {\left(x \cdot 9\right)}^{\color{blue}{-0.5}} \]
  10. Applied egg-rr34.0%

    \[\leadsto \color{blue}{{\left(x \cdot 9\right)}^{-0.5}} \]
  11. Final simplification34.0%

    \[\leadsto {\left(x \cdot 9\right)}^{-0.5} \]

Alternative 9: 38.1% accurate, 1.1× speedup?

\[\begin{array}{l} \\ \sqrt{\frac{0.1111111111111111}{x}} \end{array} \]
(FPCore (x y) :precision binary64 (sqrt (/ 0.1111111111111111 x)))
double code(double x, double y) {
	return sqrt((0.1111111111111111 / x));
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = sqrt((0.1111111111111111d0 / x))
end function
public static double code(double x, double y) {
	return Math.sqrt((0.1111111111111111 / x));
}
def code(x, y):
	return math.sqrt((0.1111111111111111 / x))
function code(x, y)
	return sqrt(Float64(0.1111111111111111 / x))
end
function tmp = code(x, y)
	tmp = sqrt((0.1111111111111111 / x));
end
code[x_, y_] := N[Sqrt[N[(0.1111111111111111 / x), $MachinePrecision]], $MachinePrecision]
\begin{array}{l}

\\
\sqrt{\frac{0.1111111111111111}{x}}
\end{array}
Derivation
  1. Initial program 99.4%

    \[\left(3 \cdot \sqrt{x}\right) \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right) \]
  2. Step-by-step derivation
    1. associate-*l*99.4%

      \[\leadsto \color{blue}{3 \cdot \left(\sqrt{x} \cdot \left(\left(y + \frac{1}{x \cdot 9}\right) - 1\right)\right)} \]
    2. associate--l+99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \color{blue}{\left(y + \left(\frac{1}{x \cdot 9} - 1\right)\right)}\right) \]
    3. sub-neg99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \color{blue}{\left(\frac{1}{x \cdot 9} + \left(-1\right)\right)}\right)\right) \]
    4. *-commutative99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{1}{\color{blue}{9 \cdot x}} + \left(-1\right)\right)\right)\right) \]
    5. associate-/r*99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\color{blue}{\frac{\frac{1}{9}}{x}} + \left(-1\right)\right)\right)\right) \]
    6. metadata-eval99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{\color{blue}{0.1111111111111111}}{x} + \left(-1\right)\right)\right)\right) \]
    7. metadata-eval99.4%

      \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + \color{blue}{-1}\right)\right)\right) \]
  3. Simplified99.4%

    \[\leadsto \color{blue}{3 \cdot \left(\sqrt{x} \cdot \left(y + \left(\frac{0.1111111111111111}{x} + -1\right)\right)\right)} \]
  4. Taylor expanded in x around 0 33.8%

    \[\leadsto 3 \cdot \left(\sqrt{x} \cdot \color{blue}{\frac{0.1111111111111111}{x}}\right) \]
  5. Step-by-step derivation
    1. associate-*r*33.9%

      \[\leadsto \color{blue}{\left(3 \cdot \sqrt{x}\right) \cdot \frac{0.1111111111111111}{x}} \]
    2. expm1-log1p-u31.7%

      \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(\left(3 \cdot \sqrt{x}\right) \cdot \frac{0.1111111111111111}{x}\right)\right)} \]
    3. expm1-udef31.9%

      \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(\left(3 \cdot \sqrt{x}\right) \cdot \frac{0.1111111111111111}{x}\right)} - 1} \]
    4. associate-*r/31.9%

      \[\leadsto e^{\mathsf{log1p}\left(\color{blue}{\frac{\left(3 \cdot \sqrt{x}\right) \cdot 0.1111111111111111}{x}}\right)} - 1 \]
    5. *-commutative31.9%

      \[\leadsto e^{\mathsf{log1p}\left(\frac{\color{blue}{\left(\sqrt{x} \cdot 3\right)} \cdot 0.1111111111111111}{x}\right)} - 1 \]
    6. associate-*l*31.9%

      \[\leadsto e^{\mathsf{log1p}\left(\frac{\color{blue}{\sqrt{x} \cdot \left(3 \cdot 0.1111111111111111\right)}}{x}\right)} - 1 \]
    7. metadata-eval31.9%

      \[\leadsto e^{\mathsf{log1p}\left(\frac{\sqrt{x} \cdot \color{blue}{0.3333333333333333}}{x}\right)} - 1 \]
  6. Applied egg-rr31.9%

    \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(\frac{\sqrt{x} \cdot 0.3333333333333333}{x}\right)} - 1} \]
  7. Step-by-step derivation
    1. expm1-def31.7%

      \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(\frac{\sqrt{x} \cdot 0.3333333333333333}{x}\right)\right)} \]
    2. expm1-log1p33.8%

      \[\leadsto \color{blue}{\frac{\sqrt{x} \cdot 0.3333333333333333}{x}} \]
    3. rem-square-sqrt33.8%

      \[\leadsto \frac{\sqrt{x} \cdot 0.3333333333333333}{\color{blue}{\sqrt{x} \cdot \sqrt{x}}} \]
    4. associate-/l/33.9%

      \[\leadsto \color{blue}{\frac{\frac{\sqrt{x} \cdot 0.3333333333333333}{\sqrt{x}}}{\sqrt{x}}} \]
    5. *-commutative33.9%

      \[\leadsto \frac{\frac{\color{blue}{0.3333333333333333 \cdot \sqrt{x}}}{\sqrt{x}}}{\sqrt{x}} \]
    6. associate-/l*33.9%

      \[\leadsto \frac{\color{blue}{\frac{0.3333333333333333}{\frac{\sqrt{x}}{\sqrt{x}}}}}{\sqrt{x}} \]
    7. *-inverses33.9%

      \[\leadsto \frac{\frac{0.3333333333333333}{\color{blue}{1}}}{\sqrt{x}} \]
    8. metadata-eval33.9%

      \[\leadsto \frac{\color{blue}{0.3333333333333333}}{\sqrt{x}} \]
  8. Simplified33.9%

    \[\leadsto \color{blue}{\frac{0.3333333333333333}{\sqrt{x}}} \]
  9. Step-by-step derivation
    1. metadata-eval33.9%

      \[\leadsto \frac{\color{blue}{\sqrt{0.1111111111111111}}}{\sqrt{x}} \]
    2. sqrt-div34.0%

      \[\leadsto \color{blue}{\sqrt{\frac{0.1111111111111111}{x}}} \]
  10. Applied egg-rr34.0%

    \[\leadsto \color{blue}{\sqrt{\frac{0.1111111111111111}{x}}} \]
  11. Final simplification34.0%

    \[\leadsto \sqrt{\frac{0.1111111111111111}{x}} \]

Developer target: 99.4% accurate, 0.5× speedup?

\[\begin{array}{l} \\ 3 \cdot \left(y \cdot \sqrt{x} + \left(\frac{1}{x \cdot 9} - 1\right) \cdot \sqrt{x}\right) \end{array} \]
(FPCore (x y)
 :precision binary64
 (* 3.0 (+ (* y (sqrt x)) (* (- (/ 1.0 (* x 9.0)) 1.0) (sqrt x)))))
double code(double x, double y) {
	return 3.0 * ((y * sqrt(x)) + (((1.0 / (x * 9.0)) - 1.0) * sqrt(x)));
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = 3.0d0 * ((y * sqrt(x)) + (((1.0d0 / (x * 9.0d0)) - 1.0d0) * sqrt(x)))
end function
public static double code(double x, double y) {
	return 3.0 * ((y * Math.sqrt(x)) + (((1.0 / (x * 9.0)) - 1.0) * Math.sqrt(x)));
}
def code(x, y):
	return 3.0 * ((y * math.sqrt(x)) + (((1.0 / (x * 9.0)) - 1.0) * math.sqrt(x)))
function code(x, y)
	return Float64(3.0 * Float64(Float64(y * sqrt(x)) + Float64(Float64(Float64(1.0 / Float64(x * 9.0)) - 1.0) * sqrt(x))))
end
function tmp = code(x, y)
	tmp = 3.0 * ((y * sqrt(x)) + (((1.0 / (x * 9.0)) - 1.0) * sqrt(x)));
end
code[x_, y_] := N[(3.0 * N[(N[(y * N[Sqrt[x], $MachinePrecision]), $MachinePrecision] + N[(N[(N[(1.0 / N[(x * 9.0), $MachinePrecision]), $MachinePrecision] - 1.0), $MachinePrecision] * N[Sqrt[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
3 \cdot \left(y \cdot \sqrt{x} + \left(\frac{1}{x \cdot 9} - 1\right) \cdot \sqrt{x}\right)
\end{array}

Reproduce

?
herbie shell --seed 2023279 
(FPCore (x y)
  :name "Numeric.SpecFunctions:incompleteGamma from math-functions-0.1.5.2, B"
  :precision binary64

  :herbie-target
  (* 3.0 (+ (* y (sqrt x)) (* (- (/ 1.0 (* x 9.0)) 1.0) (sqrt x))))

  (* (* 3.0 (sqrt x)) (- (+ y (/ 1.0 (* x 9.0))) 1.0)))