Diagrams.Solve.Polynomial:cubForm from diagrams-solve-0.1, I

Percentage Accurate: 91.1% → 97.1%
Time: 11.8s
Alternatives: 9
Speedup: 0.7×

Specification

?
\[\begin{array}{l} \\ \frac{x \cdot y - \left(z \cdot 9\right) \cdot t}{a \cdot 2} \end{array} \]
(FPCore (x y z t a)
 :precision binary64
 (/ (- (* x y) (* (* z 9.0) t)) (* a 2.0)))
double code(double x, double y, double z, double t, double a) {
	return ((x * y) - ((z * 9.0) * t)) / (a * 2.0);
}
real(8) function code(x, y, z, t, a)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    code = ((x * y) - ((z * 9.0d0) * t)) / (a * 2.0d0)
end function
public static double code(double x, double y, double z, double t, double a) {
	return ((x * y) - ((z * 9.0) * t)) / (a * 2.0);
}
def code(x, y, z, t, a):
	return ((x * y) - ((z * 9.0) * t)) / (a * 2.0)
function code(x, y, z, t, a)
	return Float64(Float64(Float64(x * y) - Float64(Float64(z * 9.0) * t)) / Float64(a * 2.0))
end
function tmp = code(x, y, z, t, a)
	tmp = ((x * y) - ((z * 9.0) * t)) / (a * 2.0);
end
code[x_, y_, z_, t_, a_] := N[(N[(N[(x * y), $MachinePrecision] - N[(N[(z * 9.0), $MachinePrecision] * t), $MachinePrecision]), $MachinePrecision] / N[(a * 2.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
\frac{x \cdot y - \left(z \cdot 9\right) \cdot t}{a \cdot 2}
\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: 91.1% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \frac{x \cdot y - \left(z \cdot 9\right) \cdot t}{a \cdot 2} \end{array} \]
(FPCore (x y z t a)
 :precision binary64
 (/ (- (* x y) (* (* z 9.0) t)) (* a 2.0)))
double code(double x, double y, double z, double t, double a) {
	return ((x * y) - ((z * 9.0) * t)) / (a * 2.0);
}
real(8) function code(x, y, z, t, a)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    code = ((x * y) - ((z * 9.0d0) * t)) / (a * 2.0d0)
end function
public static double code(double x, double y, double z, double t, double a) {
	return ((x * y) - ((z * 9.0) * t)) / (a * 2.0);
}
def code(x, y, z, t, a):
	return ((x * y) - ((z * 9.0) * t)) / (a * 2.0)
function code(x, y, z, t, a)
	return Float64(Float64(Float64(x * y) - Float64(Float64(z * 9.0) * t)) / Float64(a * 2.0))
end
function tmp = code(x, y, z, t, a)
	tmp = ((x * y) - ((z * 9.0) * t)) / (a * 2.0);
end
code[x_, y_, z_, t_, a_] := N[(N[(N[(x * y), $MachinePrecision] - N[(N[(z * 9.0), $MachinePrecision] * t), $MachinePrecision]), $MachinePrecision] / N[(a * 2.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
\frac{x \cdot y - \left(z \cdot 9\right) \cdot t}{a \cdot 2}
\end{array}

Alternative 1: 97.1% accurate, 0.4× speedup?

\[\begin{array}{l} [x, y, z, t, a] = \mathsf{sort}([x, y, z, t, a])\\\\ [x, y, z, t, a] = \mathsf{sort}([x, y, z, t, a])\\ \\ \begin{array}{l} t_1 := \mathsf{fma}\left(-t, \frac{z \cdot 4.5}{a}, x \cdot \frac{y}{a \cdot 2}\right)\\ t_2 := x \cdot y - \left(z \cdot 9\right) \cdot t\\ \mathbf{if}\;t\_2 \leq -5 \cdot 10^{+293}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;t\_2 \leq 2 \cdot 10^{+228}:\\ \;\;\;\;\frac{t\_2}{a \cdot 2}\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (fma (- t) (/ (* z 4.5) a) (* x (/ y (* a 2.0)))))
        (t_2 (- (* x y) (* (* z 9.0) t))))
   (if (<= t_2 -5e+293) t_1 (if (<= t_2 2e+228) (/ t_2 (* a 2.0)) t_1))))
assert(x < y && y < z && z < t && t < a);
assert(x < y && y < z && z < t && t < a);
double code(double x, double y, double z, double t, double a) {
	double t_1 = fma(-t, ((z * 4.5) / a), (x * (y / (a * 2.0))));
	double t_2 = (x * y) - ((z * 9.0) * t);
	double tmp;
	if (t_2 <= -5e+293) {
		tmp = t_1;
	} else if (t_2 <= 2e+228) {
		tmp = t_2 / (a * 2.0);
	} else {
		tmp = t_1;
	}
	return tmp;
}
x, y, z, t, a = sort([x, y, z, t, a])
x, y, z, t, a = sort([x, y, z, t, a])
function code(x, y, z, t, a)
	t_1 = fma(Float64(-t), Float64(Float64(z * 4.5) / a), Float64(x * Float64(y / Float64(a * 2.0))))
	t_2 = Float64(Float64(x * y) - Float64(Float64(z * 9.0) * t))
	tmp = 0.0
	if (t_2 <= -5e+293)
		tmp = t_1;
	elseif (t_2 <= 2e+228)
		tmp = Float64(t_2 / Float64(a * 2.0));
	else
		tmp = t_1;
	end
	return tmp
end
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[((-t) * N[(N[(z * 4.5), $MachinePrecision] / a), $MachinePrecision] + N[(x * N[(y / N[(a * 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$2 = N[(N[(x * y), $MachinePrecision] - N[(N[(z * 9.0), $MachinePrecision] * t), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[t$95$2, -5e+293], t$95$1, If[LessEqual[t$95$2, 2e+228], N[(t$95$2 / N[(a * 2.0), $MachinePrecision]), $MachinePrecision], t$95$1]]]]
\begin{array}{l}
[x, y, z, t, a] = \mathsf{sort}([x, y, z, t, a])\\\\
[x, y, z, t, a] = \mathsf{sort}([x, y, z, t, a])\\
\\
\begin{array}{l}
t_1 := \mathsf{fma}\left(-t, \frac{z \cdot 4.5}{a}, x \cdot \frac{y}{a \cdot 2}\right)\\
t_2 := x \cdot y - \left(z \cdot 9\right) \cdot t\\
\mathbf{if}\;t\_2 \leq -5 \cdot 10^{+293}:\\
\;\;\;\;t\_1\\

\mathbf{elif}\;t\_2 \leq 2 \cdot 10^{+228}:\\
\;\;\;\;\frac{t\_2}{a \cdot 2}\\

\mathbf{else}:\\
\;\;\;\;t\_1\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if (-.f64 (*.f64 x y) (*.f64 (*.f64 z #s(literal 9 binary64)) t)) < -5.00000000000000033e293 or 1.9999999999999998e228 < (-.f64 (*.f64 x y) (*.f64 (*.f64 z #s(literal 9 binary64)) t))

    1. Initial program 79.0%

      \[\frac{x \cdot y - \left(z \cdot 9\right) \cdot t}{a \cdot 2} \]
    2. Add Preprocessing
    3. Step-by-step derivation
      1. lift-/.f64N/A

        \[\leadsto \color{blue}{\frac{x \cdot y - \left(z \cdot 9\right) \cdot t}{a \cdot 2}} \]
      2. lift--.f64N/A

        \[\leadsto \frac{\color{blue}{x \cdot y - \left(z \cdot 9\right) \cdot t}}{a \cdot 2} \]
      3. div-subN/A

        \[\leadsto \color{blue}{\frac{x \cdot y}{a \cdot 2} - \frac{\left(z \cdot 9\right) \cdot t}{a \cdot 2}} \]
      4. sub-negN/A

        \[\leadsto \color{blue}{\frac{x \cdot y}{a \cdot 2} + \left(\mathsf{neg}\left(\frac{\left(z \cdot 9\right) \cdot t}{a \cdot 2}\right)\right)} \]
      5. +-commutativeN/A

        \[\leadsto \color{blue}{\left(\mathsf{neg}\left(\frac{\left(z \cdot 9\right) \cdot t}{a \cdot 2}\right)\right) + \frac{x \cdot y}{a \cdot 2}} \]
      6. lift-*.f64N/A

        \[\leadsto \left(\mathsf{neg}\left(\frac{\color{blue}{\left(z \cdot 9\right) \cdot t}}{a \cdot 2}\right)\right) + \frac{x \cdot y}{a \cdot 2} \]
      7. *-commutativeN/A

        \[\leadsto \left(\mathsf{neg}\left(\frac{\color{blue}{t \cdot \left(z \cdot 9\right)}}{a \cdot 2}\right)\right) + \frac{x \cdot y}{a \cdot 2} \]
      8. associate-/l*N/A

        \[\leadsto \left(\mathsf{neg}\left(\color{blue}{t \cdot \frac{z \cdot 9}{a \cdot 2}}\right)\right) + \frac{x \cdot y}{a \cdot 2} \]
      9. distribute-lft-neg-inN/A

        \[\leadsto \color{blue}{\left(\mathsf{neg}\left(t\right)\right) \cdot \frac{z \cdot 9}{a \cdot 2}} + \frac{x \cdot y}{a \cdot 2} \]
      10. lower-fma.f64N/A

        \[\leadsto \color{blue}{\mathsf{fma}\left(\mathsf{neg}\left(t\right), \frac{z \cdot 9}{a \cdot 2}, \frac{x \cdot y}{a \cdot 2}\right)} \]
      11. lower-neg.f64N/A

        \[\leadsto \mathsf{fma}\left(\color{blue}{\mathsf{neg}\left(t\right)}, \frac{z \cdot 9}{a \cdot 2}, \frac{x \cdot y}{a \cdot 2}\right) \]
      12. lift-*.f64N/A

        \[\leadsto \mathsf{fma}\left(\mathsf{neg}\left(t\right), \frac{z \cdot 9}{\color{blue}{a \cdot 2}}, \frac{x \cdot y}{a \cdot 2}\right) \]
      13. *-commutativeN/A

        \[\leadsto \mathsf{fma}\left(\mathsf{neg}\left(t\right), \frac{z \cdot 9}{\color{blue}{2 \cdot a}}, \frac{x \cdot y}{a \cdot 2}\right) \]
      14. associate-/r*N/A

        \[\leadsto \mathsf{fma}\left(\mathsf{neg}\left(t\right), \color{blue}{\frac{\frac{z \cdot 9}{2}}{a}}, \frac{x \cdot y}{a \cdot 2}\right) \]
      15. lower-/.f64N/A

        \[\leadsto \mathsf{fma}\left(\mathsf{neg}\left(t\right), \color{blue}{\frac{\frac{z \cdot 9}{2}}{a}}, \frac{x \cdot y}{a \cdot 2}\right) \]
      16. lift-*.f64N/A

        \[\leadsto \mathsf{fma}\left(\mathsf{neg}\left(t\right), \frac{\frac{\color{blue}{z \cdot 9}}{2}}{a}, \frac{x \cdot y}{a \cdot 2}\right) \]
      17. associate-/l*N/A

        \[\leadsto \mathsf{fma}\left(\mathsf{neg}\left(t\right), \frac{\color{blue}{z \cdot \frac{9}{2}}}{a}, \frac{x \cdot y}{a \cdot 2}\right) \]
      18. lower-*.f64N/A

        \[\leadsto \mathsf{fma}\left(\mathsf{neg}\left(t\right), \frac{\color{blue}{z \cdot \frac{9}{2}}}{a}, \frac{x \cdot y}{a \cdot 2}\right) \]
      19. metadata-evalN/A

        \[\leadsto \mathsf{fma}\left(\mathsf{neg}\left(t\right), \frac{z \cdot \color{blue}{\frac{9}{2}}}{a}, \frac{x \cdot y}{a \cdot 2}\right) \]
      20. lift-*.f64N/A

        \[\leadsto \mathsf{fma}\left(\mathsf{neg}\left(t\right), \frac{z \cdot \frac{9}{2}}{a}, \frac{\color{blue}{x \cdot y}}{a \cdot 2}\right) \]
      21. associate-/l*N/A

        \[\leadsto \mathsf{fma}\left(\mathsf{neg}\left(t\right), \frac{z \cdot \frac{9}{2}}{a}, \color{blue}{x \cdot \frac{y}{a \cdot 2}}\right) \]
      22. lower-*.f64N/A

        \[\leadsto \mathsf{fma}\left(\mathsf{neg}\left(t\right), \frac{z \cdot \frac{9}{2}}{a}, \color{blue}{x \cdot \frac{y}{a \cdot 2}}\right) \]
    4. Applied rewrites97.3%

      \[\leadsto \color{blue}{\mathsf{fma}\left(-t, \frac{z \cdot 4.5}{a}, x \cdot \frac{y}{a \cdot 2}\right)} \]

    if -5.00000000000000033e293 < (-.f64 (*.f64 x y) (*.f64 (*.f64 z #s(literal 9 binary64)) t)) < 1.9999999999999998e228

    1. Initial program 99.1%

      \[\frac{x \cdot y - \left(z \cdot 9\right) \cdot t}{a \cdot 2} \]
    2. Add Preprocessing
  3. Recombined 2 regimes into one program.
  4. Add Preprocessing

Alternative 2: 74.7% accurate, 0.6× speedup?

\[\begin{array}{l} [x, y, z, t, a] = \mathsf{sort}([x, y, z, t, a])\\\\ [x, y, z, t, a] = \mathsf{sort}([x, y, z, t, a])\\ \\ \begin{array}{l} t_1 := \left(z \cdot 9\right) \cdot t\\ \mathbf{if}\;t\_1 \leq -1 \cdot 10^{+40}:\\ \;\;\;\;t \cdot \left(-4.5 \cdot \frac{z}{a}\right)\\ \mathbf{elif}\;t\_1 \leq 4 \cdot 10^{+20}:\\ \;\;\;\;\frac{x \cdot y}{a \cdot 2}\\ \mathbf{else}:\\ \;\;\;\;t \cdot \frac{z \cdot -4.5}{a}\\ \end{array} \end{array} \]
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (* (* z 9.0) t)))
   (if (<= t_1 -1e+40)
     (* t (* -4.5 (/ z a)))
     (if (<= t_1 4e+20) (/ (* x y) (* a 2.0)) (* t (/ (* z -4.5) a))))))
assert(x < y && y < z && z < t && t < a);
assert(x < y && y < z && z < t && t < a);
double code(double x, double y, double z, double t, double a) {
	double t_1 = (z * 9.0) * t;
	double tmp;
	if (t_1 <= -1e+40) {
		tmp = t * (-4.5 * (z / a));
	} else if (t_1 <= 4e+20) {
		tmp = (x * y) / (a * 2.0);
	} else {
		tmp = t * ((z * -4.5) / a);
	}
	return tmp;
}
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
real(8) function code(x, y, z, t, a)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: t_1
    real(8) :: tmp
    t_1 = (z * 9.0d0) * t
    if (t_1 <= (-1d+40)) then
        tmp = t * ((-4.5d0) * (z / a))
    else if (t_1 <= 4d+20) then
        tmp = (x * y) / (a * 2.0d0)
    else
        tmp = t * ((z * (-4.5d0)) / a)
    end if
    code = tmp
end function
assert x < y && y < z && z < t && t < a;
assert x < y && y < z && z < t && t < a;
public static double code(double x, double y, double z, double t, double a) {
	double t_1 = (z * 9.0) * t;
	double tmp;
	if (t_1 <= -1e+40) {
		tmp = t * (-4.5 * (z / a));
	} else if (t_1 <= 4e+20) {
		tmp = (x * y) / (a * 2.0);
	} else {
		tmp = t * ((z * -4.5) / a);
	}
	return tmp;
}
[x, y, z, t, a] = sort([x, y, z, t, a])
[x, y, z, t, a] = sort([x, y, z, t, a])
def code(x, y, z, t, a):
	t_1 = (z * 9.0) * t
	tmp = 0
	if t_1 <= -1e+40:
		tmp = t * (-4.5 * (z / a))
	elif t_1 <= 4e+20:
		tmp = (x * y) / (a * 2.0)
	else:
		tmp = t * ((z * -4.5) / a)
	return tmp
x, y, z, t, a = sort([x, y, z, t, a])
x, y, z, t, a = sort([x, y, z, t, a])
function code(x, y, z, t, a)
	t_1 = Float64(Float64(z * 9.0) * t)
	tmp = 0.0
	if (t_1 <= -1e+40)
		tmp = Float64(t * Float64(-4.5 * Float64(z / a)));
	elseif (t_1 <= 4e+20)
		tmp = Float64(Float64(x * y) / Float64(a * 2.0));
	else
		tmp = Float64(t * Float64(Float64(z * -4.5) / a));
	end
	return tmp
end
x, y, z, t, a = num2cell(sort([x, y, z, t, a])){:}
x, y, z, t, a = num2cell(sort([x, y, z, t, a])){:}
function tmp_2 = code(x, y, z, t, a)
	t_1 = (z * 9.0) * t;
	tmp = 0.0;
	if (t_1 <= -1e+40)
		tmp = t * (-4.5 * (z / a));
	elseif (t_1 <= 4e+20)
		tmp = (x * y) / (a * 2.0);
	else
		tmp = t * ((z * -4.5) / a);
	end
	tmp_2 = tmp;
end
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(N[(z * 9.0), $MachinePrecision] * t), $MachinePrecision]}, If[LessEqual[t$95$1, -1e+40], N[(t * N[(-4.5 * N[(z / a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], If[LessEqual[t$95$1, 4e+20], N[(N[(x * y), $MachinePrecision] / N[(a * 2.0), $MachinePrecision]), $MachinePrecision], N[(t * N[(N[(z * -4.5), $MachinePrecision] / a), $MachinePrecision]), $MachinePrecision]]]]
\begin{array}{l}
[x, y, z, t, a] = \mathsf{sort}([x, y, z, t, a])\\\\
[x, y, z, t, a] = \mathsf{sort}([x, y, z, t, a])\\
\\
\begin{array}{l}
t_1 := \left(z \cdot 9\right) \cdot t\\
\mathbf{if}\;t\_1 \leq -1 \cdot 10^{+40}:\\
\;\;\;\;t \cdot \left(-4.5 \cdot \frac{z}{a}\right)\\

\mathbf{elif}\;t\_1 \leq 4 \cdot 10^{+20}:\\
\;\;\;\;\frac{x \cdot y}{a \cdot 2}\\

\mathbf{else}:\\
\;\;\;\;t \cdot \frac{z \cdot -4.5}{a}\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if (*.f64 (*.f64 z #s(literal 9 binary64)) t) < -1.00000000000000003e40

    1. Initial program 85.9%

      \[\frac{x \cdot y - \left(z \cdot 9\right) \cdot t}{a \cdot 2} \]
    2. Add Preprocessing
    3. Taylor expanded in x around 0

      \[\leadsto \color{blue}{\frac{-9}{2} \cdot \frac{t \cdot z}{a}} \]
    4. Step-by-step derivation
      1. lower-*.f64N/A

        \[\leadsto \color{blue}{\frac{-9}{2} \cdot \frac{t \cdot z}{a}} \]
      2. associate-/l*N/A

        \[\leadsto \frac{-9}{2} \cdot \color{blue}{\left(t \cdot \frac{z}{a}\right)} \]
      3. lower-*.f64N/A

        \[\leadsto \frac{-9}{2} \cdot \color{blue}{\left(t \cdot \frac{z}{a}\right)} \]
      4. lower-/.f6477.6

        \[\leadsto -4.5 \cdot \left(t \cdot \color{blue}{\frac{z}{a}}\right) \]
    5. Applied rewrites77.6%

      \[\leadsto \color{blue}{-4.5 \cdot \left(t \cdot \frac{z}{a}\right)} \]
    6. Step-by-step derivation
      1. Applied rewrites77.6%

        \[\leadsto t \cdot \color{blue}{\left(\frac{z}{a} \cdot -4.5\right)} \]

      if -1.00000000000000003e40 < (*.f64 (*.f64 z #s(literal 9 binary64)) t) < 4e20

      1. Initial program 94.6%

        \[\frac{x \cdot y - \left(z \cdot 9\right) \cdot t}{a \cdot 2} \]
      2. Add Preprocessing
      3. Taylor expanded in x around inf

        \[\leadsto \frac{\color{blue}{x \cdot y}}{a \cdot 2} \]
      4. Step-by-step derivation
        1. lower-*.f6472.9

          \[\leadsto \frac{\color{blue}{x \cdot y}}{a \cdot 2} \]
      5. Applied rewrites72.9%

        \[\leadsto \frac{\color{blue}{x \cdot y}}{a \cdot 2} \]

      if 4e20 < (*.f64 (*.f64 z #s(literal 9 binary64)) t)

      1. Initial program 87.6%

        \[\frac{x \cdot y - \left(z \cdot 9\right) \cdot t}{a \cdot 2} \]
      2. Add Preprocessing
      3. Taylor expanded in x around 0

        \[\leadsto \color{blue}{\frac{-9}{2} \cdot \frac{t \cdot z}{a}} \]
      4. Step-by-step derivation
        1. lower-*.f64N/A

          \[\leadsto \color{blue}{\frac{-9}{2} \cdot \frac{t \cdot z}{a}} \]
        2. associate-/l*N/A

          \[\leadsto \frac{-9}{2} \cdot \color{blue}{\left(t \cdot \frac{z}{a}\right)} \]
        3. lower-*.f64N/A

          \[\leadsto \frac{-9}{2} \cdot \color{blue}{\left(t \cdot \frac{z}{a}\right)} \]
        4. lower-/.f6476.4

          \[\leadsto -4.5 \cdot \left(t \cdot \color{blue}{\frac{z}{a}}\right) \]
      5. Applied rewrites76.4%

        \[\leadsto \color{blue}{-4.5 \cdot \left(t \cdot \frac{z}{a}\right)} \]
      6. Step-by-step derivation
        1. Applied rewrites76.3%

          \[\leadsto \frac{z \cdot -4.5}{a} \cdot \color{blue}{t} \]
      7. Recombined 3 regimes into one program.
      8. Final simplification74.7%

        \[\leadsto \begin{array}{l} \mathbf{if}\;\left(z \cdot 9\right) \cdot t \leq -1 \cdot 10^{+40}:\\ \;\;\;\;t \cdot \left(-4.5 \cdot \frac{z}{a}\right)\\ \mathbf{elif}\;\left(z \cdot 9\right) \cdot t \leq 4 \cdot 10^{+20}:\\ \;\;\;\;\frac{x \cdot y}{a \cdot 2}\\ \mathbf{else}:\\ \;\;\;\;t \cdot \frac{z \cdot -4.5}{a}\\ \end{array} \]
      9. Add Preprocessing

      Developer Target 1: 93.7% accurate, 0.6× speedup?

      \[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;a < -2.090464557976709 \cdot 10^{+86}:\\ \;\;\;\;0.5 \cdot \frac{y \cdot x}{a} - 4.5 \cdot \frac{t}{\frac{a}{z}}\\ \mathbf{elif}\;a < 2.144030707833976 \cdot 10^{+99}:\\ \;\;\;\;\frac{x \cdot y - z \cdot \left(9 \cdot t\right)}{a \cdot 2}\\ \mathbf{else}:\\ \;\;\;\;\frac{y}{a} \cdot \left(x \cdot 0.5\right) - \frac{t}{a} \cdot \left(z \cdot 4.5\right)\\ \end{array} \end{array} \]
      (FPCore (x y z t a)
       :precision binary64
       (if (< a -2.090464557976709e+86)
         (- (* 0.5 (/ (* y x) a)) (* 4.5 (/ t (/ a z))))
         (if (< a 2.144030707833976e+99)
           (/ (- (* x y) (* z (* 9.0 t))) (* a 2.0))
           (- (* (/ y a) (* x 0.5)) (* (/ t a) (* z 4.5))))))
      double code(double x, double y, double z, double t, double a) {
      	double tmp;
      	if (a < -2.090464557976709e+86) {
      		tmp = (0.5 * ((y * x) / a)) - (4.5 * (t / (a / z)));
      	} else if (a < 2.144030707833976e+99) {
      		tmp = ((x * y) - (z * (9.0 * t))) / (a * 2.0);
      	} else {
      		tmp = ((y / a) * (x * 0.5)) - ((t / a) * (z * 4.5));
      	}
      	return tmp;
      }
      
      real(8) function code(x, y, z, t, a)
          real(8), intent (in) :: x
          real(8), intent (in) :: y
          real(8), intent (in) :: z
          real(8), intent (in) :: t
          real(8), intent (in) :: a
          real(8) :: tmp
          if (a < (-2.090464557976709d+86)) then
              tmp = (0.5d0 * ((y * x) / a)) - (4.5d0 * (t / (a / z)))
          else if (a < 2.144030707833976d+99) then
              tmp = ((x * y) - (z * (9.0d0 * t))) / (a * 2.0d0)
          else
              tmp = ((y / a) * (x * 0.5d0)) - ((t / a) * (z * 4.5d0))
          end if
          code = tmp
      end function
      
      public static double code(double x, double y, double z, double t, double a) {
      	double tmp;
      	if (a < -2.090464557976709e+86) {
      		tmp = (0.5 * ((y * x) / a)) - (4.5 * (t / (a / z)));
      	} else if (a < 2.144030707833976e+99) {
      		tmp = ((x * y) - (z * (9.0 * t))) / (a * 2.0);
      	} else {
      		tmp = ((y / a) * (x * 0.5)) - ((t / a) * (z * 4.5));
      	}
      	return tmp;
      }
      
      def code(x, y, z, t, a):
      	tmp = 0
      	if a < -2.090464557976709e+86:
      		tmp = (0.5 * ((y * x) / a)) - (4.5 * (t / (a / z)))
      	elif a < 2.144030707833976e+99:
      		tmp = ((x * y) - (z * (9.0 * t))) / (a * 2.0)
      	else:
      		tmp = ((y / a) * (x * 0.5)) - ((t / a) * (z * 4.5))
      	return tmp
      
      function code(x, y, z, t, a)
      	tmp = 0.0
      	if (a < -2.090464557976709e+86)
      		tmp = Float64(Float64(0.5 * Float64(Float64(y * x) / a)) - Float64(4.5 * Float64(t / Float64(a / z))));
      	elseif (a < 2.144030707833976e+99)
      		tmp = Float64(Float64(Float64(x * y) - Float64(z * Float64(9.0 * t))) / Float64(a * 2.0));
      	else
      		tmp = Float64(Float64(Float64(y / a) * Float64(x * 0.5)) - Float64(Float64(t / a) * Float64(z * 4.5)));
      	end
      	return tmp
      end
      
      function tmp_2 = code(x, y, z, t, a)
      	tmp = 0.0;
      	if (a < -2.090464557976709e+86)
      		tmp = (0.5 * ((y * x) / a)) - (4.5 * (t / (a / z)));
      	elseif (a < 2.144030707833976e+99)
      		tmp = ((x * y) - (z * (9.0 * t))) / (a * 2.0);
      	else
      		tmp = ((y / a) * (x * 0.5)) - ((t / a) * (z * 4.5));
      	end
      	tmp_2 = tmp;
      end
      
      code[x_, y_, z_, t_, a_] := If[Less[a, -2.090464557976709e+86], N[(N[(0.5 * N[(N[(y * x), $MachinePrecision] / a), $MachinePrecision]), $MachinePrecision] - N[(4.5 * N[(t / N[(a / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], If[Less[a, 2.144030707833976e+99], N[(N[(N[(x * y), $MachinePrecision] - N[(z * N[(9.0 * t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / N[(a * 2.0), $MachinePrecision]), $MachinePrecision], N[(N[(N[(y / a), $MachinePrecision] * N[(x * 0.5), $MachinePrecision]), $MachinePrecision] - N[(N[(t / a), $MachinePrecision] * N[(z * 4.5), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]
      
      \begin{array}{l}
      
      \\
      \begin{array}{l}
      \mathbf{if}\;a < -2.090464557976709 \cdot 10^{+86}:\\
      \;\;\;\;0.5 \cdot \frac{y \cdot x}{a} - 4.5 \cdot \frac{t}{\frac{a}{z}}\\
      
      \mathbf{elif}\;a < 2.144030707833976 \cdot 10^{+99}:\\
      \;\;\;\;\frac{x \cdot y - z \cdot \left(9 \cdot t\right)}{a \cdot 2}\\
      
      \mathbf{else}:\\
      \;\;\;\;\frac{y}{a} \cdot \left(x \cdot 0.5\right) - \frac{t}{a} \cdot \left(z \cdot 4.5\right)\\
      
      
      \end{array}
      \end{array}
      

      Reproduce

      ?
      herbie shell --seed 2024223 
      (FPCore (x y z t a)
        :name "Diagrams.Solve.Polynomial:cubForm  from diagrams-solve-0.1, I"
        :precision binary64
      
        :alt
        (! :herbie-platform default (if (< a -209046455797670900000000000000000000000000000000000000000000000000000000000000000000000) (- (* 1/2 (/ (* y x) a)) (* 9/2 (/ t (/ a z)))) (if (< a 2144030707833976000000000000000000000000000000000000000000000000000000000000000000000000000000000000) (/ (- (* x y) (* z (* 9 t))) (* a 2)) (- (* (/ y a) (* x 1/2)) (* (/ t a) (* z 9/2))))))
      
        (/ (- (* x y) (* (* z 9.0) t)) (* a 2.0)))