Diagrams.Solve.Polynomial:quartForm from diagrams-solve-0.1, B

Percentage Accurate: 100.0% → 100.0%
Time: 7.2s
Alternatives: 8
Speedup: 1.2×

Specification

?
\[\begin{array}{l} \\ \left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \end{array} \]
(FPCore (x y z t)
 :precision binary64
 (+ (- (* (/ 1.0 8.0) x) (/ (* y z) 2.0)) t))
double code(double x, double y, double z, double t) {
	return (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t;
}
real(8) function code(x, y, z, t)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    code = (((1.0d0 / 8.0d0) * x) - ((y * z) / 2.0d0)) + t
end function
public static double code(double x, double y, double z, double t) {
	return (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t;
}
def code(x, y, z, t):
	return (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t
function code(x, y, z, t)
	return Float64(Float64(Float64(Float64(1.0 / 8.0) * x) - Float64(Float64(y * z) / 2.0)) + t)
end
function tmp = code(x, y, z, t)
	tmp = (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t;
end
code[x_, y_, z_, t_] := N[(N[(N[(N[(1.0 / 8.0), $MachinePrecision] * x), $MachinePrecision] - N[(N[(y * z), $MachinePrecision] / 2.0), $MachinePrecision]), $MachinePrecision] + t), $MachinePrecision]
\begin{array}{l}

\\
\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t
\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 8 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: 100.0% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \end{array} \]
(FPCore (x y z t)
 :precision binary64
 (+ (- (* (/ 1.0 8.0) x) (/ (* y z) 2.0)) t))
double code(double x, double y, double z, double t) {
	return (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t;
}
real(8) function code(x, y, z, t)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    code = (((1.0d0 / 8.0d0) * x) - ((y * z) / 2.0d0)) + t
end function
public static double code(double x, double y, double z, double t) {
	return (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t;
}
def code(x, y, z, t):
	return (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t
function code(x, y, z, t)
	return Float64(Float64(Float64(Float64(1.0 / 8.0) * x) - Float64(Float64(y * z) / 2.0)) + t)
end
function tmp = code(x, y, z, t)
	tmp = (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t;
end
code[x_, y_, z_, t_] := N[(N[(N[(N[(1.0 / 8.0), $MachinePrecision] * x), $MachinePrecision] - N[(N[(y * z), $MachinePrecision] / 2.0), $MachinePrecision]), $MachinePrecision] + t), $MachinePrecision]
\begin{array}{l}

\\
\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t
\end{array}

Alternative 1: 100.0% accurate, 0.1× speedup?

\[\begin{array}{l} \\ \mathsf{fma}\left(0.125, x, \mathsf{fma}\left(y, z \cdot -0.5, t\right)\right) \end{array} \]
(FPCore (x y z t) :precision binary64 (fma 0.125 x (fma y (* z -0.5) t)))
double code(double x, double y, double z, double t) {
	return fma(0.125, x, fma(y, (z * -0.5), t));
}
function code(x, y, z, t)
	return fma(0.125, x, fma(y, Float64(z * -0.5), t))
end
code[x_, y_, z_, t_] := N[(0.125 * x + N[(y * N[(z * -0.5), $MachinePrecision] + t), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
\mathsf{fma}\left(0.125, x, \mathsf{fma}\left(y, z \cdot -0.5, t\right)\right)
\end{array}
Derivation
  1. Initial program 100.0%

    \[\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \]
  2. Step-by-step derivation
    1. associate-+l-100.0%

      \[\leadsto \color{blue}{\frac{1}{8} \cdot x - \left(\frac{y \cdot z}{2} - t\right)} \]
    2. fma-neg100.0%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{1}{8}, x, -\left(\frac{y \cdot z}{2} - t\right)\right)} \]
    3. metadata-eval100.0%

      \[\leadsto \mathsf{fma}\left(\color{blue}{0.125}, x, -\left(\frac{y \cdot z}{2} - t\right)\right) \]
    4. sub-neg100.0%

      \[\leadsto \mathsf{fma}\left(0.125, x, -\color{blue}{\left(\frac{y \cdot z}{2} + \left(-t\right)\right)}\right) \]
    5. distribute-neg-in100.0%

      \[\leadsto \mathsf{fma}\left(0.125, x, \color{blue}{\left(-\frac{y \cdot z}{2}\right) + \left(-\left(-t\right)\right)}\right) \]
    6. distribute-frac-neg100.0%

      \[\leadsto \mathsf{fma}\left(0.125, x, \color{blue}{\frac{-y \cdot z}{2}} + \left(-\left(-t\right)\right)\right) \]
    7. distribute-rgt-neg-out100.0%

      \[\leadsto \mathsf{fma}\left(0.125, x, \frac{\color{blue}{y \cdot \left(-z\right)}}{2} + \left(-\left(-t\right)\right)\right) \]
    8. remove-double-neg100.0%

      \[\leadsto \mathsf{fma}\left(0.125, x, \frac{y \cdot \left(-z\right)}{2} + \color{blue}{t}\right) \]
    9. associate-/l*100.0%

      \[\leadsto \mathsf{fma}\left(0.125, x, \color{blue}{y \cdot \frac{-z}{2}} + t\right) \]
    10. fma-define100.0%

      \[\leadsto \mathsf{fma}\left(0.125, x, \color{blue}{\mathsf{fma}\left(y, \frac{-z}{2}, t\right)}\right) \]
    11. neg-mul-1100.0%

      \[\leadsto \mathsf{fma}\left(0.125, x, \mathsf{fma}\left(y, \frac{\color{blue}{-1 \cdot z}}{2}, t\right)\right) \]
    12. *-commutative100.0%

      \[\leadsto \mathsf{fma}\left(0.125, x, \mathsf{fma}\left(y, \frac{\color{blue}{z \cdot -1}}{2}, t\right)\right) \]
    13. associate-/l*100.0%

      \[\leadsto \mathsf{fma}\left(0.125, x, \mathsf{fma}\left(y, \color{blue}{z \cdot \frac{-1}{2}}, t\right)\right) \]
    14. metadata-eval100.0%

      \[\leadsto \mathsf{fma}\left(0.125, x, \mathsf{fma}\left(y, z \cdot \color{blue}{-0.5}, t\right)\right) \]
  3. Simplified100.0%

    \[\leadsto \color{blue}{\mathsf{fma}\left(0.125, x, \mathsf{fma}\left(y, z \cdot -0.5, t\right)\right)} \]
  4. Add Preprocessing
  5. Final simplification100.0%

    \[\leadsto \mathsf{fma}\left(0.125, x, \mathsf{fma}\left(y, z \cdot -0.5, t\right)\right) \]
  6. Add Preprocessing

Alternative 2: 48.6% accurate, 0.5× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_1 := z \cdot \left(y \cdot -0.5\right)\\ \mathbf{if}\;x \leq -1.62 \cdot 10^{+94}:\\ \;\;\;\;0.125 \cdot x\\ \mathbf{elif}\;x \leq -2.85 \cdot 10^{+48}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;x \leq -1.12 \cdot 10^{-49}:\\ \;\;\;\;0.125 \cdot x\\ \mathbf{elif}\;x \leq -5.6 \cdot 10^{-246}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;x \leq 4100:\\ \;\;\;\;t\\ \mathbf{else}:\\ \;\;\;\;0.125 \cdot x\\ \end{array} \end{array} \]
(FPCore (x y z t)
 :precision binary64
 (let* ((t_1 (* z (* y -0.5))))
   (if (<= x -1.62e+94)
     (* 0.125 x)
     (if (<= x -2.85e+48)
       t_1
       (if (<= x -1.12e-49)
         (* 0.125 x)
         (if (<= x -5.6e-246) t_1 (if (<= x 4100.0) t (* 0.125 x))))))))
double code(double x, double y, double z, double t) {
	double t_1 = z * (y * -0.5);
	double tmp;
	if (x <= -1.62e+94) {
		tmp = 0.125 * x;
	} else if (x <= -2.85e+48) {
		tmp = t_1;
	} else if (x <= -1.12e-49) {
		tmp = 0.125 * x;
	} else if (x <= -5.6e-246) {
		tmp = t_1;
	} else if (x <= 4100.0) {
		tmp = t;
	} else {
		tmp = 0.125 * x;
	}
	return tmp;
}
real(8) function code(x, y, z, t)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8) :: t_1
    real(8) :: tmp
    t_1 = z * (y * (-0.5d0))
    if (x <= (-1.62d+94)) then
        tmp = 0.125d0 * x
    else if (x <= (-2.85d+48)) then
        tmp = t_1
    else if (x <= (-1.12d-49)) then
        tmp = 0.125d0 * x
    else if (x <= (-5.6d-246)) then
        tmp = t_1
    else if (x <= 4100.0d0) then
        tmp = t
    else
        tmp = 0.125d0 * x
    end if
    code = tmp
end function
public static double code(double x, double y, double z, double t) {
	double t_1 = z * (y * -0.5);
	double tmp;
	if (x <= -1.62e+94) {
		tmp = 0.125 * x;
	} else if (x <= -2.85e+48) {
		tmp = t_1;
	} else if (x <= -1.12e-49) {
		tmp = 0.125 * x;
	} else if (x <= -5.6e-246) {
		tmp = t_1;
	} else if (x <= 4100.0) {
		tmp = t;
	} else {
		tmp = 0.125 * x;
	}
	return tmp;
}
def code(x, y, z, t):
	t_1 = z * (y * -0.5)
	tmp = 0
	if x <= -1.62e+94:
		tmp = 0.125 * x
	elif x <= -2.85e+48:
		tmp = t_1
	elif x <= -1.12e-49:
		tmp = 0.125 * x
	elif x <= -5.6e-246:
		tmp = t_1
	elif x <= 4100.0:
		tmp = t
	else:
		tmp = 0.125 * x
	return tmp
function code(x, y, z, t)
	t_1 = Float64(z * Float64(y * -0.5))
	tmp = 0.0
	if (x <= -1.62e+94)
		tmp = Float64(0.125 * x);
	elseif (x <= -2.85e+48)
		tmp = t_1;
	elseif (x <= -1.12e-49)
		tmp = Float64(0.125 * x);
	elseif (x <= -5.6e-246)
		tmp = t_1;
	elseif (x <= 4100.0)
		tmp = t;
	else
		tmp = Float64(0.125 * x);
	end
	return tmp
end
function tmp_2 = code(x, y, z, t)
	t_1 = z * (y * -0.5);
	tmp = 0.0;
	if (x <= -1.62e+94)
		tmp = 0.125 * x;
	elseif (x <= -2.85e+48)
		tmp = t_1;
	elseif (x <= -1.12e-49)
		tmp = 0.125 * x;
	elseif (x <= -5.6e-246)
		tmp = t_1;
	elseif (x <= 4100.0)
		tmp = t;
	else
		tmp = 0.125 * x;
	end
	tmp_2 = tmp;
end
code[x_, y_, z_, t_] := Block[{t$95$1 = N[(z * N[(y * -0.5), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[x, -1.62e+94], N[(0.125 * x), $MachinePrecision], If[LessEqual[x, -2.85e+48], t$95$1, If[LessEqual[x, -1.12e-49], N[(0.125 * x), $MachinePrecision], If[LessEqual[x, -5.6e-246], t$95$1, If[LessEqual[x, 4100.0], t, N[(0.125 * x), $MachinePrecision]]]]]]]
\begin{array}{l}

\\
\begin{array}{l}
t_1 := z \cdot \left(y \cdot -0.5\right)\\
\mathbf{if}\;x \leq -1.62 \cdot 10^{+94}:\\
\;\;\;\;0.125 \cdot x\\

\mathbf{elif}\;x \leq -2.85 \cdot 10^{+48}:\\
\;\;\;\;t\_1\\

\mathbf{elif}\;x \leq -1.12 \cdot 10^{-49}:\\
\;\;\;\;0.125 \cdot x\\

\mathbf{elif}\;x \leq -5.6 \cdot 10^{-246}:\\
\;\;\;\;t\_1\\

\mathbf{elif}\;x \leq 4100:\\
\;\;\;\;t\\

\mathbf{else}:\\
\;\;\;\;0.125 \cdot x\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if x < -1.61999999999999997e94 or -2.84999999999999984e48 < x < -1.1199999999999999e-49 or 4100 < x

    1. Initial program 100.0%

      \[\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \]
    2. Step-by-step derivation
      1. associate-+l-100.0%

        \[\leadsto \color{blue}{\frac{1}{8} \cdot x - \left(\frac{y \cdot z}{2} - t\right)} \]
      2. *-commutative100.0%

        \[\leadsto \frac{1}{8} \cdot x - \left(\frac{\color{blue}{z \cdot y}}{2} - t\right) \]
      3. associate-+l-100.0%

        \[\leadsto \color{blue}{\left(\frac{1}{8} \cdot x - \frac{z \cdot y}{2}\right) + t} \]
      4. metadata-eval100.0%

        \[\leadsto \left(\color{blue}{0.125} \cdot x - \frac{z \cdot y}{2}\right) + t \]
      5. *-commutative100.0%

        \[\leadsto \left(0.125 \cdot x - \frac{\color{blue}{y \cdot z}}{2}\right) + t \]
      6. associate-/l*100.0%

        \[\leadsto \left(0.125 \cdot x - \color{blue}{y \cdot \frac{z}{2}}\right) + t \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{\left(0.125 \cdot x - y \cdot \frac{z}{2}\right) + t} \]
    4. Add Preprocessing
    5. Taylor expanded in x around inf 65.4%

      \[\leadsto \color{blue}{0.125 \cdot x} \]

    if -1.61999999999999997e94 < x < -2.84999999999999984e48 or -1.1199999999999999e-49 < x < -5.5999999999999999e-246

    1. Initial program 99.9%

      \[\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \]
    2. Step-by-step derivation
      1. associate-+l-99.9%

        \[\leadsto \color{blue}{\frac{1}{8} \cdot x - \left(\frac{y \cdot z}{2} - t\right)} \]
      2. *-commutative99.9%

        \[\leadsto \frac{1}{8} \cdot x - \left(\frac{\color{blue}{z \cdot y}}{2} - t\right) \]
      3. associate-+l-99.9%

        \[\leadsto \color{blue}{\left(\frac{1}{8} \cdot x - \frac{z \cdot y}{2}\right) + t} \]
      4. metadata-eval99.9%

        \[\leadsto \left(\color{blue}{0.125} \cdot x - \frac{z \cdot y}{2}\right) + t \]
      5. *-commutative99.9%

        \[\leadsto \left(0.125 \cdot x - \frac{\color{blue}{y \cdot z}}{2}\right) + t \]
      6. associate-/l*99.9%

        \[\leadsto \left(0.125 \cdot x - \color{blue}{y \cdot \frac{z}{2}}\right) + t \]
    3. Simplified99.9%

      \[\leadsto \color{blue}{\left(0.125 \cdot x - y \cdot \frac{z}{2}\right) + t} \]
    4. Add Preprocessing
    5. Taylor expanded in y around inf 60.6%

      \[\leadsto \color{blue}{-0.5 \cdot \left(y \cdot z\right)} \]
    6. Step-by-step derivation
      1. *-commutative60.6%

        \[\leadsto \color{blue}{\left(y \cdot z\right) \cdot -0.5} \]
      2. *-commutative60.6%

        \[\leadsto \color{blue}{\left(z \cdot y\right)} \cdot -0.5 \]
      3. associate-*r*60.6%

        \[\leadsto \color{blue}{z \cdot \left(y \cdot -0.5\right)} \]
    7. Simplified60.6%

      \[\leadsto \color{blue}{z \cdot \left(y \cdot -0.5\right)} \]

    if -5.5999999999999999e-246 < x < 4100

    1. Initial program 100.0%

      \[\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \]
    2. Step-by-step derivation
      1. associate-+l-100.0%

        \[\leadsto \color{blue}{\frac{1}{8} \cdot x - \left(\frac{y \cdot z}{2} - t\right)} \]
      2. *-commutative100.0%

        \[\leadsto \frac{1}{8} \cdot x - \left(\frac{\color{blue}{z \cdot y}}{2} - t\right) \]
      3. associate-+l-100.0%

        \[\leadsto \color{blue}{\left(\frac{1}{8} \cdot x - \frac{z \cdot y}{2}\right) + t} \]
      4. metadata-eval100.0%

        \[\leadsto \left(\color{blue}{0.125} \cdot x - \frac{z \cdot y}{2}\right) + t \]
      5. *-commutative100.0%

        \[\leadsto \left(0.125 \cdot x - \frac{\color{blue}{y \cdot z}}{2}\right) + t \]
      6. associate-/l*100.0%

        \[\leadsto \left(0.125 \cdot x - \color{blue}{y \cdot \frac{z}{2}}\right) + t \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{\left(0.125 \cdot x - y \cdot \frac{z}{2}\right) + t} \]
    4. Add Preprocessing
    5. Taylor expanded in t around inf 52.9%

      \[\leadsto \color{blue}{t} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification60.7%

    \[\leadsto \begin{array}{l} \mathbf{if}\;x \leq -1.62 \cdot 10^{+94}:\\ \;\;\;\;0.125 \cdot x\\ \mathbf{elif}\;x \leq -2.85 \cdot 10^{+48}:\\ \;\;\;\;z \cdot \left(y \cdot -0.5\right)\\ \mathbf{elif}\;x \leq -1.12 \cdot 10^{-49}:\\ \;\;\;\;0.125 \cdot x\\ \mathbf{elif}\;x \leq -5.6 \cdot 10^{-246}:\\ \;\;\;\;z \cdot \left(y \cdot -0.5\right)\\ \mathbf{elif}\;x \leq 4100:\\ \;\;\;\;t\\ \mathbf{else}:\\ \;\;\;\;0.125 \cdot x\\ \end{array} \]
  5. Add Preprocessing

Alternative 3: 88.2% accurate, 0.6× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \cdot z \leq -5 \cdot 10^{+70} \lor \neg \left(y \cdot z \leq 10^{+78}\right):\\ \;\;\;\;t - 0.5 \cdot \left(y \cdot z\right)\\ \mathbf{else}:\\ \;\;\;\;t + 0.125 \cdot x\\ \end{array} \end{array} \]
(FPCore (x y z t)
 :precision binary64
 (if (or (<= (* y z) -5e+70) (not (<= (* y z) 1e+78)))
   (- t (* 0.5 (* y z)))
   (+ t (* 0.125 x))))
double code(double x, double y, double z, double t) {
	double tmp;
	if (((y * z) <= -5e+70) || !((y * z) <= 1e+78)) {
		tmp = t - (0.5 * (y * z));
	} else {
		tmp = t + (0.125 * x);
	}
	return tmp;
}
real(8) function code(x, y, z, t)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8) :: tmp
    if (((y * z) <= (-5d+70)) .or. (.not. ((y * z) <= 1d+78))) then
        tmp = t - (0.5d0 * (y * z))
    else
        tmp = t + (0.125d0 * x)
    end if
    code = tmp
end function
public static double code(double x, double y, double z, double t) {
	double tmp;
	if (((y * z) <= -5e+70) || !((y * z) <= 1e+78)) {
		tmp = t - (0.5 * (y * z));
	} else {
		tmp = t + (0.125 * x);
	}
	return tmp;
}
def code(x, y, z, t):
	tmp = 0
	if ((y * z) <= -5e+70) or not ((y * z) <= 1e+78):
		tmp = t - (0.5 * (y * z))
	else:
		tmp = t + (0.125 * x)
	return tmp
function code(x, y, z, t)
	tmp = 0.0
	if ((Float64(y * z) <= -5e+70) || !(Float64(y * z) <= 1e+78))
		tmp = Float64(t - Float64(0.5 * Float64(y * z)));
	else
		tmp = Float64(t + Float64(0.125 * x));
	end
	return tmp
end
function tmp_2 = code(x, y, z, t)
	tmp = 0.0;
	if (((y * z) <= -5e+70) || ~(((y * z) <= 1e+78)))
		tmp = t - (0.5 * (y * z));
	else
		tmp = t + (0.125 * x);
	end
	tmp_2 = tmp;
end
code[x_, y_, z_, t_] := If[Or[LessEqual[N[(y * z), $MachinePrecision], -5e+70], N[Not[LessEqual[N[(y * z), $MachinePrecision], 1e+78]], $MachinePrecision]], N[(t - N[(0.5 * N[(y * z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(t + N[(0.125 * x), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \cdot z \leq -5 \cdot 10^{+70} \lor \neg \left(y \cdot z \leq 10^{+78}\right):\\
\;\;\;\;t - 0.5 \cdot \left(y \cdot z\right)\\

\mathbf{else}:\\
\;\;\;\;t + 0.125 \cdot x\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if (*.f64 y z) < -5.0000000000000002e70 or 1.00000000000000001e78 < (*.f64 y z)

    1. Initial program 100.0%

      \[\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \]
    2. Step-by-step derivation
      1. associate-+l-100.0%

        \[\leadsto \color{blue}{\frac{1}{8} \cdot x - \left(\frac{y \cdot z}{2} - t\right)} \]
      2. *-commutative100.0%

        \[\leadsto \frac{1}{8} \cdot x - \left(\frac{\color{blue}{z \cdot y}}{2} - t\right) \]
      3. associate-+l-100.0%

        \[\leadsto \color{blue}{\left(\frac{1}{8} \cdot x - \frac{z \cdot y}{2}\right) + t} \]
      4. metadata-eval100.0%

        \[\leadsto \left(\color{blue}{0.125} \cdot x - \frac{z \cdot y}{2}\right) + t \]
      5. *-commutative100.0%

        \[\leadsto \left(0.125 \cdot x - \frac{\color{blue}{y \cdot z}}{2}\right) + t \]
      6. associate-/l*100.0%

        \[\leadsto \left(0.125 \cdot x - \color{blue}{y \cdot \frac{z}{2}}\right) + t \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{\left(0.125 \cdot x - y \cdot \frac{z}{2}\right) + t} \]
    4. Add Preprocessing
    5. Taylor expanded in x around 0 89.4%

      \[\leadsto \color{blue}{t - 0.5 \cdot \left(y \cdot z\right)} \]

    if -5.0000000000000002e70 < (*.f64 y z) < 1.00000000000000001e78

    1. Initial program 100.0%

      \[\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \]
    2. Step-by-step derivation
      1. associate-+l-100.0%

        \[\leadsto \color{blue}{\frac{1}{8} \cdot x - \left(\frac{y \cdot z}{2} - t\right)} \]
      2. *-commutative100.0%

        \[\leadsto \frac{1}{8} \cdot x - \left(\frac{\color{blue}{z \cdot y}}{2} - t\right) \]
      3. associate-+l-100.0%

        \[\leadsto \color{blue}{\left(\frac{1}{8} \cdot x - \frac{z \cdot y}{2}\right) + t} \]
      4. metadata-eval100.0%

        \[\leadsto \left(\color{blue}{0.125} \cdot x - \frac{z \cdot y}{2}\right) + t \]
      5. *-commutative100.0%

        \[\leadsto \left(0.125 \cdot x - \frac{\color{blue}{y \cdot z}}{2}\right) + t \]
      6. associate-/l*100.0%

        \[\leadsto \left(0.125 \cdot x - \color{blue}{y \cdot \frac{z}{2}}\right) + t \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{\left(0.125 \cdot x - y \cdot \frac{z}{2}\right) + t} \]
    4. Add Preprocessing
    5. Taylor expanded in y around 0 89.6%

      \[\leadsto \color{blue}{t + 0.125 \cdot x} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification89.5%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \cdot z \leq -5 \cdot 10^{+70} \lor \neg \left(y \cdot z \leq 10^{+78}\right):\\ \;\;\;\;t - 0.5 \cdot \left(y \cdot z\right)\\ \mathbf{else}:\\ \;\;\;\;t + 0.125 \cdot x\\ \end{array} \]
  5. Add Preprocessing

Alternative 4: 85.7% accurate, 0.7× speedup?

\[\begin{array}{l} \\ \begin{array}{l} t_1 := 0.5 \cdot \left(y \cdot z\right)\\ \mathbf{if}\;t \leq -2 \cdot 10^{+17} \lor \neg \left(t \leq 1.18 \cdot 10^{+98}\right):\\ \;\;\;\;t - t\_1\\ \mathbf{else}:\\ \;\;\;\;0.125 \cdot x - t\_1\\ \end{array} \end{array} \]
(FPCore (x y z t)
 :precision binary64
 (let* ((t_1 (* 0.5 (* y z))))
   (if (or (<= t -2e+17) (not (<= t 1.18e+98)))
     (- t t_1)
     (- (* 0.125 x) t_1))))
double code(double x, double y, double z, double t) {
	double t_1 = 0.5 * (y * z);
	double tmp;
	if ((t <= -2e+17) || !(t <= 1.18e+98)) {
		tmp = t - t_1;
	} else {
		tmp = (0.125 * x) - t_1;
	}
	return tmp;
}
real(8) function code(x, y, z, t)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8) :: t_1
    real(8) :: tmp
    t_1 = 0.5d0 * (y * z)
    if ((t <= (-2d+17)) .or. (.not. (t <= 1.18d+98))) then
        tmp = t - t_1
    else
        tmp = (0.125d0 * x) - t_1
    end if
    code = tmp
end function
public static double code(double x, double y, double z, double t) {
	double t_1 = 0.5 * (y * z);
	double tmp;
	if ((t <= -2e+17) || !(t <= 1.18e+98)) {
		tmp = t - t_1;
	} else {
		tmp = (0.125 * x) - t_1;
	}
	return tmp;
}
def code(x, y, z, t):
	t_1 = 0.5 * (y * z)
	tmp = 0
	if (t <= -2e+17) or not (t <= 1.18e+98):
		tmp = t - t_1
	else:
		tmp = (0.125 * x) - t_1
	return tmp
function code(x, y, z, t)
	t_1 = Float64(0.5 * Float64(y * z))
	tmp = 0.0
	if ((t <= -2e+17) || !(t <= 1.18e+98))
		tmp = Float64(t - t_1);
	else
		tmp = Float64(Float64(0.125 * x) - t_1);
	end
	return tmp
end
function tmp_2 = code(x, y, z, t)
	t_1 = 0.5 * (y * z);
	tmp = 0.0;
	if ((t <= -2e+17) || ~((t <= 1.18e+98)))
		tmp = t - t_1;
	else
		tmp = (0.125 * x) - t_1;
	end
	tmp_2 = tmp;
end
code[x_, y_, z_, t_] := Block[{t$95$1 = N[(0.5 * N[(y * z), $MachinePrecision]), $MachinePrecision]}, If[Or[LessEqual[t, -2e+17], N[Not[LessEqual[t, 1.18e+98]], $MachinePrecision]], N[(t - t$95$1), $MachinePrecision], N[(N[(0.125 * x), $MachinePrecision] - t$95$1), $MachinePrecision]]]
\begin{array}{l}

\\
\begin{array}{l}
t_1 := 0.5 \cdot \left(y \cdot z\right)\\
\mathbf{if}\;t \leq -2 \cdot 10^{+17} \lor \neg \left(t \leq 1.18 \cdot 10^{+98}\right):\\
\;\;\;\;t - t\_1\\

\mathbf{else}:\\
\;\;\;\;0.125 \cdot x - t\_1\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if t < -2e17 or 1.18000000000000002e98 < t

    1. Initial program 100.0%

      \[\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \]
    2. Step-by-step derivation
      1. associate-+l-100.0%

        \[\leadsto \color{blue}{\frac{1}{8} \cdot x - \left(\frac{y \cdot z}{2} - t\right)} \]
      2. *-commutative100.0%

        \[\leadsto \frac{1}{8} \cdot x - \left(\frac{\color{blue}{z \cdot y}}{2} - t\right) \]
      3. associate-+l-100.0%

        \[\leadsto \color{blue}{\left(\frac{1}{8} \cdot x - \frac{z \cdot y}{2}\right) + t} \]
      4. metadata-eval100.0%

        \[\leadsto \left(\color{blue}{0.125} \cdot x - \frac{z \cdot y}{2}\right) + t \]
      5. *-commutative100.0%

        \[\leadsto \left(0.125 \cdot x - \frac{\color{blue}{y \cdot z}}{2}\right) + t \]
      6. associate-/l*100.0%

        \[\leadsto \left(0.125 \cdot x - \color{blue}{y \cdot \frac{z}{2}}\right) + t \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{\left(0.125 \cdot x - y \cdot \frac{z}{2}\right) + t} \]
    4. Add Preprocessing
    5. Taylor expanded in x around 0 87.6%

      \[\leadsto \color{blue}{t - 0.5 \cdot \left(y \cdot z\right)} \]

    if -2e17 < t < 1.18000000000000002e98

    1. Initial program 100.0%

      \[\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \]
    2. Step-by-step derivation
      1. associate-+l-100.0%

        \[\leadsto \color{blue}{\frac{1}{8} \cdot x - \left(\frac{y \cdot z}{2} - t\right)} \]
      2. *-commutative100.0%

        \[\leadsto \frac{1}{8} \cdot x - \left(\frac{\color{blue}{z \cdot y}}{2} - t\right) \]
      3. associate-+l-100.0%

        \[\leadsto \color{blue}{\left(\frac{1}{8} \cdot x - \frac{z \cdot y}{2}\right) + t} \]
      4. metadata-eval100.0%

        \[\leadsto \left(\color{blue}{0.125} \cdot x - \frac{z \cdot y}{2}\right) + t \]
      5. *-commutative100.0%

        \[\leadsto \left(0.125 \cdot x - \frac{\color{blue}{y \cdot z}}{2}\right) + t \]
      6. associate-/l*100.0%

        \[\leadsto \left(0.125 \cdot x - \color{blue}{y \cdot \frac{z}{2}}\right) + t \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{\left(0.125 \cdot x - y \cdot \frac{z}{2}\right) + t} \]
    4. Add Preprocessing
    5. Taylor expanded in t around 0 91.4%

      \[\leadsto \color{blue}{0.125 \cdot x - 0.5 \cdot \left(y \cdot z\right)} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification89.9%

    \[\leadsto \begin{array}{l} \mathbf{if}\;t \leq -2 \cdot 10^{+17} \lor \neg \left(t \leq 1.18 \cdot 10^{+98}\right):\\ \;\;\;\;t - 0.5 \cdot \left(y \cdot z\right)\\ \mathbf{else}:\\ \;\;\;\;0.125 \cdot x - 0.5 \cdot \left(y \cdot z\right)\\ \end{array} \]
  5. Add Preprocessing

Alternative 5: 71.8% accurate, 0.9× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -1.4 \cdot 10^{+170} \lor \neg \left(y \leq 20.5\right):\\ \;\;\;\;z \cdot \left(y \cdot -0.5\right)\\ \mathbf{else}:\\ \;\;\;\;t + 0.125 \cdot x\\ \end{array} \end{array} \]
(FPCore (x y z t)
 :precision binary64
 (if (or (<= y -1.4e+170) (not (<= y 20.5)))
   (* z (* y -0.5))
   (+ t (* 0.125 x))))
double code(double x, double y, double z, double t) {
	double tmp;
	if ((y <= -1.4e+170) || !(y <= 20.5)) {
		tmp = z * (y * -0.5);
	} else {
		tmp = t + (0.125 * x);
	}
	return tmp;
}
real(8) function code(x, y, z, t)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8) :: tmp
    if ((y <= (-1.4d+170)) .or. (.not. (y <= 20.5d0))) then
        tmp = z * (y * (-0.5d0))
    else
        tmp = t + (0.125d0 * x)
    end if
    code = tmp
end function
public static double code(double x, double y, double z, double t) {
	double tmp;
	if ((y <= -1.4e+170) || !(y <= 20.5)) {
		tmp = z * (y * -0.5);
	} else {
		tmp = t + (0.125 * x);
	}
	return tmp;
}
def code(x, y, z, t):
	tmp = 0
	if (y <= -1.4e+170) or not (y <= 20.5):
		tmp = z * (y * -0.5)
	else:
		tmp = t + (0.125 * x)
	return tmp
function code(x, y, z, t)
	tmp = 0.0
	if ((y <= -1.4e+170) || !(y <= 20.5))
		tmp = Float64(z * Float64(y * -0.5));
	else
		tmp = Float64(t + Float64(0.125 * x));
	end
	return tmp
end
function tmp_2 = code(x, y, z, t)
	tmp = 0.0;
	if ((y <= -1.4e+170) || ~((y <= 20.5)))
		tmp = z * (y * -0.5);
	else
		tmp = t + (0.125 * x);
	end
	tmp_2 = tmp;
end
code[x_, y_, z_, t_] := If[Or[LessEqual[y, -1.4e+170], N[Not[LessEqual[y, 20.5]], $MachinePrecision]], N[(z * N[(y * -0.5), $MachinePrecision]), $MachinePrecision], N[(t + N[(0.125 * x), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y \leq -1.4 \cdot 10^{+170} \lor \neg \left(y \leq 20.5\right):\\
\;\;\;\;z \cdot \left(y \cdot -0.5\right)\\

\mathbf{else}:\\
\;\;\;\;t + 0.125 \cdot x\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if y < -1.40000000000000008e170 or 20.5 < y

    1. Initial program 100.0%

      \[\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \]
    2. Step-by-step derivation
      1. associate-+l-100.0%

        \[\leadsto \color{blue}{\frac{1}{8} \cdot x - \left(\frac{y \cdot z}{2} - t\right)} \]
      2. *-commutative100.0%

        \[\leadsto \frac{1}{8} \cdot x - \left(\frac{\color{blue}{z \cdot y}}{2} - t\right) \]
      3. associate-+l-100.0%

        \[\leadsto \color{blue}{\left(\frac{1}{8} \cdot x - \frac{z \cdot y}{2}\right) + t} \]
      4. metadata-eval100.0%

        \[\leadsto \left(\color{blue}{0.125} \cdot x - \frac{z \cdot y}{2}\right) + t \]
      5. *-commutative100.0%

        \[\leadsto \left(0.125 \cdot x - \frac{\color{blue}{y \cdot z}}{2}\right) + t \]
      6. associate-/l*100.0%

        \[\leadsto \left(0.125 \cdot x - \color{blue}{y \cdot \frac{z}{2}}\right) + t \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{\left(0.125 \cdot x - y \cdot \frac{z}{2}\right) + t} \]
    4. Add Preprocessing
    5. Taylor expanded in y around inf 57.7%

      \[\leadsto \color{blue}{-0.5 \cdot \left(y \cdot z\right)} \]
    6. Step-by-step derivation
      1. *-commutative57.7%

        \[\leadsto \color{blue}{\left(y \cdot z\right) \cdot -0.5} \]
      2. *-commutative57.7%

        \[\leadsto \color{blue}{\left(z \cdot y\right)} \cdot -0.5 \]
      3. associate-*r*57.7%

        \[\leadsto \color{blue}{z \cdot \left(y \cdot -0.5\right)} \]
    7. Simplified57.7%

      \[\leadsto \color{blue}{z \cdot \left(y \cdot -0.5\right)} \]

    if -1.40000000000000008e170 < y < 20.5

    1. Initial program 100.0%

      \[\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \]
    2. Step-by-step derivation
      1. associate-+l-100.0%

        \[\leadsto \color{blue}{\frac{1}{8} \cdot x - \left(\frac{y \cdot z}{2} - t\right)} \]
      2. *-commutative100.0%

        \[\leadsto \frac{1}{8} \cdot x - \left(\frac{\color{blue}{z \cdot y}}{2} - t\right) \]
      3. associate-+l-100.0%

        \[\leadsto \color{blue}{\left(\frac{1}{8} \cdot x - \frac{z \cdot y}{2}\right) + t} \]
      4. metadata-eval100.0%

        \[\leadsto \left(\color{blue}{0.125} \cdot x - \frac{z \cdot y}{2}\right) + t \]
      5. *-commutative100.0%

        \[\leadsto \left(0.125 \cdot x - \frac{\color{blue}{y \cdot z}}{2}\right) + t \]
      6. associate-/l*100.0%

        \[\leadsto \left(0.125 \cdot x - \color{blue}{y \cdot \frac{z}{2}}\right) + t \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{\left(0.125 \cdot x - y \cdot \frac{z}{2}\right) + t} \]
    4. Add Preprocessing
    5. Taylor expanded in y around 0 80.0%

      \[\leadsto \color{blue}{t + 0.125 \cdot x} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification71.9%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -1.4 \cdot 10^{+170} \lor \neg \left(y \leq 20.5\right):\\ \;\;\;\;z \cdot \left(y \cdot -0.5\right)\\ \mathbf{else}:\\ \;\;\;\;t + 0.125 \cdot x\\ \end{array} \]
  5. Add Preprocessing

Alternative 6: 49.9% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;t \leq -330000:\\ \;\;\;\;t\\ \mathbf{elif}\;t \leq 1.8 \cdot 10^{+61}:\\ \;\;\;\;0.125 \cdot x\\ \mathbf{else}:\\ \;\;\;\;t\\ \end{array} \end{array} \]
(FPCore (x y z t)
 :precision binary64
 (if (<= t -330000.0) t (if (<= t 1.8e+61) (* 0.125 x) t)))
double code(double x, double y, double z, double t) {
	double tmp;
	if (t <= -330000.0) {
		tmp = t;
	} else if (t <= 1.8e+61) {
		tmp = 0.125 * x;
	} else {
		tmp = t;
	}
	return tmp;
}
real(8) function code(x, y, z, t)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8) :: tmp
    if (t <= (-330000.0d0)) then
        tmp = t
    else if (t <= 1.8d+61) then
        tmp = 0.125d0 * x
    else
        tmp = t
    end if
    code = tmp
end function
public static double code(double x, double y, double z, double t) {
	double tmp;
	if (t <= -330000.0) {
		tmp = t;
	} else if (t <= 1.8e+61) {
		tmp = 0.125 * x;
	} else {
		tmp = t;
	}
	return tmp;
}
def code(x, y, z, t):
	tmp = 0
	if t <= -330000.0:
		tmp = t
	elif t <= 1.8e+61:
		tmp = 0.125 * x
	else:
		tmp = t
	return tmp
function code(x, y, z, t)
	tmp = 0.0
	if (t <= -330000.0)
		tmp = t;
	elseif (t <= 1.8e+61)
		tmp = Float64(0.125 * x);
	else
		tmp = t;
	end
	return tmp
end
function tmp_2 = code(x, y, z, t)
	tmp = 0.0;
	if (t <= -330000.0)
		tmp = t;
	elseif (t <= 1.8e+61)
		tmp = 0.125 * x;
	else
		tmp = t;
	end
	tmp_2 = tmp;
end
code[x_, y_, z_, t_] := If[LessEqual[t, -330000.0], t, If[LessEqual[t, 1.8e+61], N[(0.125 * x), $MachinePrecision], t]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;t \leq -330000:\\
\;\;\;\;t\\

\mathbf{elif}\;t \leq 1.8 \cdot 10^{+61}:\\
\;\;\;\;0.125 \cdot x\\

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


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if t < -3.3e5 or 1.80000000000000005e61 < t

    1. Initial program 100.0%

      \[\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \]
    2. Step-by-step derivation
      1. associate-+l-100.0%

        \[\leadsto \color{blue}{\frac{1}{8} \cdot x - \left(\frac{y \cdot z}{2} - t\right)} \]
      2. *-commutative100.0%

        \[\leadsto \frac{1}{8} \cdot x - \left(\frac{\color{blue}{z \cdot y}}{2} - t\right) \]
      3. associate-+l-100.0%

        \[\leadsto \color{blue}{\left(\frac{1}{8} \cdot x - \frac{z \cdot y}{2}\right) + t} \]
      4. metadata-eval100.0%

        \[\leadsto \left(\color{blue}{0.125} \cdot x - \frac{z \cdot y}{2}\right) + t \]
      5. *-commutative100.0%

        \[\leadsto \left(0.125 \cdot x - \frac{\color{blue}{y \cdot z}}{2}\right) + t \]
      6. associate-/l*100.0%

        \[\leadsto \left(0.125 \cdot x - \color{blue}{y \cdot \frac{z}{2}}\right) + t \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{\left(0.125 \cdot x - y \cdot \frac{z}{2}\right) + t} \]
    4. Add Preprocessing
    5. Taylor expanded in t around inf 61.6%

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

    if -3.3e5 < t < 1.80000000000000005e61

    1. Initial program 100.0%

      \[\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \]
    2. Step-by-step derivation
      1. associate-+l-100.0%

        \[\leadsto \color{blue}{\frac{1}{8} \cdot x - \left(\frac{y \cdot z}{2} - t\right)} \]
      2. *-commutative100.0%

        \[\leadsto \frac{1}{8} \cdot x - \left(\frac{\color{blue}{z \cdot y}}{2} - t\right) \]
      3. associate-+l-100.0%

        \[\leadsto \color{blue}{\left(\frac{1}{8} \cdot x - \frac{z \cdot y}{2}\right) + t} \]
      4. metadata-eval100.0%

        \[\leadsto \left(\color{blue}{0.125} \cdot x - \frac{z \cdot y}{2}\right) + t \]
      5. *-commutative100.0%

        \[\leadsto \left(0.125 \cdot x - \frac{\color{blue}{y \cdot z}}{2}\right) + t \]
      6. associate-/l*100.0%

        \[\leadsto \left(0.125 \cdot x - \color{blue}{y \cdot \frac{z}{2}}\right) + t \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{\left(0.125 \cdot x - y \cdot \frac{z}{2}\right) + t} \]
    4. Add Preprocessing
    5. Taylor expanded in x around inf 52.5%

      \[\leadsto \color{blue}{0.125 \cdot x} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification56.5%

    \[\leadsto \begin{array}{l} \mathbf{if}\;t \leq -330000:\\ \;\;\;\;t\\ \mathbf{elif}\;t \leq 1.8 \cdot 10^{+61}:\\ \;\;\;\;0.125 \cdot x\\ \mathbf{else}:\\ \;\;\;\;t\\ \end{array} \]
  5. Add Preprocessing

Alternative 7: 100.0% accurate, 1.2× speedup?

\[\begin{array}{l} \\ t + \left(0.125 \cdot x - y \cdot \frac{z}{2}\right) \end{array} \]
(FPCore (x y z t) :precision binary64 (+ t (- (* 0.125 x) (* y (/ z 2.0)))))
double code(double x, double y, double z, double t) {
	return t + ((0.125 * x) - (y * (z / 2.0)));
}
real(8) function code(x, y, z, t)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    code = t + ((0.125d0 * x) - (y * (z / 2.0d0)))
end function
public static double code(double x, double y, double z, double t) {
	return t + ((0.125 * x) - (y * (z / 2.0)));
}
def code(x, y, z, t):
	return t + ((0.125 * x) - (y * (z / 2.0)))
function code(x, y, z, t)
	return Float64(t + Float64(Float64(0.125 * x) - Float64(y * Float64(z / 2.0))))
end
function tmp = code(x, y, z, t)
	tmp = t + ((0.125 * x) - (y * (z / 2.0)));
end
code[x_, y_, z_, t_] := N[(t + N[(N[(0.125 * x), $MachinePrecision] - N[(y * N[(z / 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
t + \left(0.125 \cdot x - y \cdot \frac{z}{2}\right)
\end{array}
Derivation
  1. Initial program 100.0%

    \[\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \]
  2. Step-by-step derivation
    1. associate-+l-100.0%

      \[\leadsto \color{blue}{\frac{1}{8} \cdot x - \left(\frac{y \cdot z}{2} - t\right)} \]
    2. *-commutative100.0%

      \[\leadsto \frac{1}{8} \cdot x - \left(\frac{\color{blue}{z \cdot y}}{2} - t\right) \]
    3. associate-+l-100.0%

      \[\leadsto \color{blue}{\left(\frac{1}{8} \cdot x - \frac{z \cdot y}{2}\right) + t} \]
    4. metadata-eval100.0%

      \[\leadsto \left(\color{blue}{0.125} \cdot x - \frac{z \cdot y}{2}\right) + t \]
    5. *-commutative100.0%

      \[\leadsto \left(0.125 \cdot x - \frac{\color{blue}{y \cdot z}}{2}\right) + t \]
    6. associate-/l*100.0%

      \[\leadsto \left(0.125 \cdot x - \color{blue}{y \cdot \frac{z}{2}}\right) + t \]
  3. Simplified100.0%

    \[\leadsto \color{blue}{\left(0.125 \cdot x - y \cdot \frac{z}{2}\right) + t} \]
  4. Add Preprocessing
  5. Final simplification100.0%

    \[\leadsto t + \left(0.125 \cdot x - y \cdot \frac{z}{2}\right) \]
  6. Add Preprocessing

Alternative 8: 32.5% accurate, 13.0× speedup?

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

\\
t
\end{array}
Derivation
  1. Initial program 100.0%

    \[\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t \]
  2. Step-by-step derivation
    1. associate-+l-100.0%

      \[\leadsto \color{blue}{\frac{1}{8} \cdot x - \left(\frac{y \cdot z}{2} - t\right)} \]
    2. *-commutative100.0%

      \[\leadsto \frac{1}{8} \cdot x - \left(\frac{\color{blue}{z \cdot y}}{2} - t\right) \]
    3. associate-+l-100.0%

      \[\leadsto \color{blue}{\left(\frac{1}{8} \cdot x - \frac{z \cdot y}{2}\right) + t} \]
    4. metadata-eval100.0%

      \[\leadsto \left(\color{blue}{0.125} \cdot x - \frac{z \cdot y}{2}\right) + t \]
    5. *-commutative100.0%

      \[\leadsto \left(0.125 \cdot x - \frac{\color{blue}{y \cdot z}}{2}\right) + t \]
    6. associate-/l*100.0%

      \[\leadsto \left(0.125 \cdot x - \color{blue}{y \cdot \frac{z}{2}}\right) + t \]
  3. Simplified100.0%

    \[\leadsto \color{blue}{\left(0.125 \cdot x - y \cdot \frac{z}{2}\right) + t} \]
  4. Add Preprocessing
  5. Taylor expanded in t around inf 32.2%

    \[\leadsto \color{blue}{t} \]
  6. Final simplification32.2%

    \[\leadsto t \]
  7. Add Preprocessing

Developer target: 100.0% accurate, 1.2× speedup?

\[\begin{array}{l} \\ \left(\frac{x}{8} + t\right) - \frac{z}{2} \cdot y \end{array} \]
(FPCore (x y z t) :precision binary64 (- (+ (/ x 8.0) t) (* (/ z 2.0) y)))
double code(double x, double y, double z, double t) {
	return ((x / 8.0) + t) - ((z / 2.0) * y);
}
real(8) function code(x, y, z, t)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    code = ((x / 8.0d0) + t) - ((z / 2.0d0) * y)
end function
public static double code(double x, double y, double z, double t) {
	return ((x / 8.0) + t) - ((z / 2.0) * y);
}
def code(x, y, z, t):
	return ((x / 8.0) + t) - ((z / 2.0) * y)
function code(x, y, z, t)
	return Float64(Float64(Float64(x / 8.0) + t) - Float64(Float64(z / 2.0) * y))
end
function tmp = code(x, y, z, t)
	tmp = ((x / 8.0) + t) - ((z / 2.0) * y);
end
code[x_, y_, z_, t_] := N[(N[(N[(x / 8.0), $MachinePrecision] + t), $MachinePrecision] - N[(N[(z / 2.0), $MachinePrecision] * y), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
\left(\frac{x}{8} + t\right) - \frac{z}{2} \cdot y
\end{array}

Reproduce

?
herbie shell --seed 2024077 
(FPCore (x y z t)
  :name "Diagrams.Solve.Polynomial:quartForm  from diagrams-solve-0.1, B"
  :precision binary64

  :alt
  (- (+ (/ x 8.0) t) (* (/ z 2.0) y))

  (+ (- (* (/ 1.0 8.0) x) (/ (* y z) 2.0)) t))