Statistics.Distribution.Binomial:$cvariance from math-functions-0.1.5.2

Percentage Accurate: 99.9% → 99.9%

Time: 6.9s

Alternatives: 7

Speedup: 1.0×

• 25.5% of points produce a very large (infinite) output. You may want to add a precondition.

Specification

Math

\[\begin{array}{l} \\ \left(x \cdot y\right) \cdot \left(1 - y\right) \end{array} \]

FPCore

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

C

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

Fortran

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

Java

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

Python

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

Julia

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

MATLAB

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

Wolfram

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

Initial Program: 99.9% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \left(x \cdot y\right) \cdot \left(1 - y\right) \end{array} \]

FPCore

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

C

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

Fortran

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

Java

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

Python

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

Julia

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

MATLAB

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

Wolfram

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

Alternative 1: 99.9% accurate, 0.5× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \left(-y\right) \cdot \left(x \cdot y\right)\\ \mathbf{if}\;y \leq -1 \cdot 10^{+154}:\\ \;\;\;\;t\_0\\ \mathbf{elif}\;y \leq 2.5 \cdot 10^{+80}:\\ \;\;\;\;\left(\left(1 - y\right) \cdot y\right) \cdot x\\ \mathbf{else}:\\ \;\;\;\;t\_0\\ \end{array} \end{array} \]

FPCore

(FPCore (x y)
 :precision binary64
 (let* ((t_0 (* (- y) (* x y))))
   (if (<= y -1e+154) t_0 (if (<= y 2.5e+80) (* (* (- 1.0 y) y) x) t_0))))

C

double code(double x, double y) {
	double t_0 = -y * (x * y);
	double tmp;
	if (y <= -1e+154) {
		tmp = t_0;
	} else if (y <= 2.5e+80) {
		tmp = ((1.0 - y) * y) * x;
	} else {
		tmp = t_0;
	}
	return tmp;
}

Fortran

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 = -y * (x * y)
    if (y <= (-1d+154)) then
        tmp = t_0
    else if (y <= 2.5d+80) then
        tmp = ((1.0d0 - y) * y) * x
    else
        tmp = t_0
    end if
    code = tmp
end function

Java

public static double code(double x, double y) {
	double t_0 = -y * (x * y);
	double tmp;
	if (y <= -1e+154) {
		tmp = t_0;
	} else if (y <= 2.5e+80) {
		tmp = ((1.0 - y) * y) * x;
	} else {
		tmp = t_0;
	}
	return tmp;
}

Python

def code(x, y):
	t_0 = -y * (x * y)
	tmp = 0
	if y <= -1e+154:
		tmp = t_0
	elif y <= 2.5e+80:
		tmp = ((1.0 - y) * y) * x
	else:
		tmp = t_0
	return tmp

Julia

function code(x, y)
	t_0 = Float64(Float64(-y) * Float64(x * y))
	tmp = 0.0
	if (y <= -1e+154)
		tmp = t_0;
	elseif (y <= 2.5e+80)
		tmp = Float64(Float64(Float64(1.0 - y) * y) * x);
	else
		tmp = t_0;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y)
	t_0 = -y * (x * y);
	tmp = 0.0;
	if (y <= -1e+154)
		tmp = t_0;
	elseif (y <= 2.5e+80)
		tmp = ((1.0 - y) * y) * x;
	else
		tmp = t_0;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_] := Block[{t$95$0 = N[((-y) * N[(x * y), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[y, -1e+154], t$95$0, If[LessEqual[y, 2.5e+80], N[(N[(N[(1.0 - y), $MachinePrecision] * y), $MachinePrecision] * x), $MachinePrecision], t$95$0]]]

Derivation

1. Split input into 2 regimes

2. if y < -1.00000000000000004e154 or 2.4999999999999998e80 < y

   1. Initial program 99.9%

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

   3. Taylor expanded in y around inf

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

      1. mul-1-neg N/A

         \[\leadsto \left(x \cdot y\right) \cdot \color{blue}{\left(\mathsf{neg}\left(y\right)\right)} \]

      2. lower-neg.f64 99.9

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

   5. Applied rewrites 99.9%

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

   if -1.00000000000000004e154 < y < 2.4999999999999998e80

   1. Initial program 99.9%

      \[\left(x \cdot y\right) \cdot \left(1 - y\right) \]
   2. Add Preprocessing
   3. Step-by-step derivation

      1. lift-*.f64 N/A

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

      2. lift--.f64 N/A

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

      3. sub-neg N/A

         \[\leadsto \left(x \cdot y\right) \cdot \color{blue}{\left(1 + \left(\mathsf{neg}\left(y\right)\right)\right)} \]

      4. +-commutative N/A

         \[\leadsto \left(x \cdot y\right) \cdot \color{blue}{\left(\left(\mathsf{neg}\left(y\right)\right) + 1\right)} \]

      5. distribute-rgt-in N/A

         \[\leadsto \color{blue}{\left(\mathsf{neg}\left(y\right)\right) \cdot \left(x \cdot y\right) + 1 \cdot \left(x \cdot y\right)} \]

      6. lift-*.f64 N/A

         \[\leadsto \left(\mathsf{neg}\left(y\right)\right) \cdot \color{blue}{\left(x \cdot y\right)} + 1 \cdot \left(x \cdot y\right) \]

      7. *-commutative N/A

         \[\leadsto \left(\mathsf{neg}\left(y\right)\right) \cdot \color{blue}{\left(y \cdot x\right)} + 1 \cdot \left(x \cdot y\right) \]

      8. associate-*r* N/A

         \[\leadsto \color{blue}{\left(\left(\mathsf{neg}\left(y\right)\right) \cdot y\right) \cdot x} + 1 \cdot \left(x \cdot y\right) \]

      9. distribute-lft-neg-in N/A

         \[\leadsto \color{blue}{\left(\mathsf{neg}\left(y \cdot y\right)\right)} \cdot x + 1 \cdot \left(x \cdot y\right) \]

      10. *-lft-identity N/A

          \[\leadsto \left(\mathsf{neg}\left(y \cdot y\right)\right) \cdot x + \color{blue}{x \cdot y} \]

      11. lower-fma.f64 N/A

          \[\leadsto \color{blue}{\mathsf{fma}\left(\mathsf{neg}\left(y \cdot y\right), x, x \cdot y\right)} \]

      12. distribute-lft-neg-in N/A

          \[\leadsto \mathsf{fma}\left(\color{blue}{\left(\mathsf{neg}\left(y\right)\right) \cdot y}, x, x \cdot y\right) \]

      13. lower-*.f64 N/A

          \[\leadsto \mathsf{fma}\left(\color{blue}{\left(\mathsf{neg}\left(y\right)\right) \cdot y}, x, x \cdot y\right) \]

      14. lower-neg.f64 98.7

          \[\leadsto \mathsf{fma}\left(\color{blue}{\left(-y\right)} \cdot y, x, x \cdot y\right) \]

      15. lift-*.f64 N/A

          \[\leadsto \mathsf{fma}\left(\left(\mathsf{neg}\left(y\right)\right) \cdot y, x, \color{blue}{x \cdot y}\right) \]

      16. *-commutative N/A

          \[\leadsto \mathsf{fma}\left(\left(\mathsf{neg}\left(y\right)\right) \cdot y, x, \color{blue}{y \cdot x}\right) \]

      17. lower-*.f64 98.7

          \[\leadsto \mathsf{fma}\left(\left(-y\right) \cdot y, x, \color{blue}{y \cdot x}\right) \]

   4. Applied rewrites 98.7%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\left(-y\right) \cdot y, x, y \cdot x\right)} \]

   5. Taylor expanded in y around 0

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

      1. mul-1-neg N/A

         \[\leadsto y \cdot \left(x + \color{blue}{\left(\mathsf{neg}\left(x \cdot y\right)\right)}\right) \]

      2. unsub-neg N/A

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

      3. distribute-rgt-out-- N/A

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

      4. associate-*r* N/A

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

      5. unpow2 N/A

         \[\leadsto x \cdot y - x \cdot \color{blue}{{y}^{2}} \]

      6. distribute-lft-out-- N/A

         \[\leadsto \color{blue}{x \cdot \left(y - {y}^{2}\right)} \]

      7. unsub-neg N/A

         \[\leadsto x \cdot \color{blue}{\left(y + \left(\mathsf{neg}\left({y}^{2}\right)\right)\right)} \]

      8. mul-1-neg N/A

         \[\leadsto x \cdot \left(y + \color{blue}{-1 \cdot {y}^{2}}\right) \]

      9. *-commutative N/A

         \[\leadsto \color{blue}{\left(y + -1 \cdot {y}^{2}\right) \cdot x} \]

      10. lower-*.f64 N/A

          \[\leadsto \color{blue}{\left(y + -1 \cdot {y}^{2}\right) \cdot x} \]

      11. mul-1-neg N/A

          \[\leadsto \left(y + \color{blue}{\left(\mathsf{neg}\left({y}^{2}\right)\right)}\right) \cdot x \]

      12. unsub-neg N/A

          \[\leadsto \color{blue}{\left(y - {y}^{2}\right)} \cdot x \]

      13. unpow2 N/A

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

      14. *-rgt-identity N/A

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

      15. distribute-lft-out-- N/A

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

      16. *-commutative N/A

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

      17. lower-*.f64 N/A

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

      18. lower--.f64 100.0

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

   7. Applied rewrites 100.0%

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

4. Final simplification 99.9%

   \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -1 \cdot 10^{+154}:\\ \;\;\;\;\left(-y\right) \cdot \left(x \cdot y\right)\\ \mathbf{elif}\;y \leq 2.5 \cdot 10^{+80}:\\ \;\;\;\;\left(\left(1 - y\right) \cdot y\right) \cdot x\\ \mathbf{else}:\\ \;\;\;\;\left(-y\right) \cdot \left(x \cdot y\right)\\ \end{array} \]
5. Add Preprocessing

Alternative 2: 98.0% accurate, 0.6× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \left(-y\right) \cdot \left(x \cdot y\right)\\ \mathbf{if}\;y \leq -1:\\ \;\;\;\;t\_0\\ \mathbf{elif}\;y \leq 1:\\ \;\;\;\;x \cdot y\\ \mathbf{else}:\\ \;\;\;\;t\_0\\ \end{array} \end{array} \]

FPCore

(FPCore (x y)
 :precision binary64
 (let* ((t_0 (* (- y) (* x y))))
   (if (<= y -1.0) t_0 (if (<= y 1.0) (* x y) t_0))))

C

double code(double x, double y) {
	double t_0 = -y * (x * y);
	double tmp;
	if (y <= -1.0) {
		tmp = t_0;
	} else if (y <= 1.0) {
		tmp = x * y;
	} else {
		tmp = t_0;
	}
	return tmp;
}

Fortran

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 = -y * (x * y)
    if (y <= (-1.0d0)) then
        tmp = t_0
    else if (y <= 1.0d0) then
        tmp = x * y
    else
        tmp = t_0
    end if
    code = tmp
end function

Java

public static double code(double x, double y) {
	double t_0 = -y * (x * y);
	double tmp;
	if (y <= -1.0) {
		tmp = t_0;
	} else if (y <= 1.0) {
		tmp = x * y;
	} else {
		tmp = t_0;
	}
	return tmp;
}

Python

def code(x, y):
	t_0 = -y * (x * y)
	tmp = 0
	if y <= -1.0:
		tmp = t_0
	elif y <= 1.0:
		tmp = x * y
	else:
		tmp = t_0
	return tmp

Julia

function code(x, y)
	t_0 = Float64(Float64(-y) * Float64(x * y))
	tmp = 0.0
	if (y <= -1.0)
		tmp = t_0;
	elseif (y <= 1.0)
		tmp = Float64(x * y);
	else
		tmp = t_0;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y)
	t_0 = -y * (x * y);
	tmp = 0.0;
	if (y <= -1.0)
		tmp = t_0;
	elseif (y <= 1.0)
		tmp = x * y;
	else
		tmp = t_0;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_] := Block[{t$95$0 = N[((-y) * N[(x * y), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[y, -1.0], t$95$0, If[LessEqual[y, 1.0], N[(x * y), $MachinePrecision], t$95$0]]]

Derivation

1. Split input into 2 regimes

2. if y < -1 or 1 < y

   1. Initial program 99.8%

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

   3. Taylor expanded in y around inf

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

      1. mul-1-neg N/A

         \[\leadsto \left(x \cdot y\right) \cdot \color{blue}{\left(\mathsf{neg}\left(y\right)\right)} \]

      2. lower-neg.f64 98.3

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

   5. Applied rewrites 98.3%

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

   if -1 < y < 1

   1. Initial program 100.0%

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

   3. Taylor expanded in y around 0

      \[\leadsto \color{blue}{x \cdot y} \]
   4. Step-by-step derivation

      1. *-commutative N/A

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

      2. lower-*.f64 97.8

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

   5. Applied rewrites 97.8%

      \[\leadsto \color{blue}{y \cdot x} \]
3. Recombined 2 regimes into one program.

4. Final simplification 98.0%

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

Reproduce

herbie shell --seed 2024230 
(FPCore (x y)
  :name "Statistics.Distribution.Binomial:$cvariance from math-functions-0.1.5.2"
  :precision binary64
  (* (* x y) (- 1.0 y)))