Toniolo and Linder, Equation (3a)

Percentage Accurate: 98.2% → 98.2%
Time: 14.0s
Alternatives: 6
Speedup: 1.0×

Specification

?
\[\begin{array}{l} \\ \sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)} \end{array} \]
(FPCore (l Om kx ky)
 :precision binary64
 (sqrt
  (*
   (/ 1.0 2.0)
   (+
    1.0
    (/
     1.0
     (sqrt
      (+
       1.0
       (*
        (pow (/ (* 2.0 l) Om) 2.0)
        (+ (pow (sin kx) 2.0) (pow (sin ky) 2.0))))))))))
double code(double l, double Om, double kx, double ky) {
	return sqrt(((1.0 / 2.0) * (1.0 + (1.0 / sqrt((1.0 + (pow(((2.0 * l) / Om), 2.0) * (pow(sin(kx), 2.0) + pow(sin(ky), 2.0)))))))));
}
real(8) function code(l, om, kx, ky)
    real(8), intent (in) :: l
    real(8), intent (in) :: om
    real(8), intent (in) :: kx
    real(8), intent (in) :: ky
    code = sqrt(((1.0d0 / 2.0d0) * (1.0d0 + (1.0d0 / sqrt((1.0d0 + ((((2.0d0 * l) / om) ** 2.0d0) * ((sin(kx) ** 2.0d0) + (sin(ky) ** 2.0d0)))))))))
end function
public static double code(double l, double Om, double kx, double ky) {
	return Math.sqrt(((1.0 / 2.0) * (1.0 + (1.0 / Math.sqrt((1.0 + (Math.pow(((2.0 * l) / Om), 2.0) * (Math.pow(Math.sin(kx), 2.0) + Math.pow(Math.sin(ky), 2.0)))))))));
}
def code(l, Om, kx, ky):
	return math.sqrt(((1.0 / 2.0) * (1.0 + (1.0 / math.sqrt((1.0 + (math.pow(((2.0 * l) / Om), 2.0) * (math.pow(math.sin(kx), 2.0) + math.pow(math.sin(ky), 2.0)))))))))
function code(l, Om, kx, ky)
	return sqrt(Float64(Float64(1.0 / 2.0) * Float64(1.0 + Float64(1.0 / sqrt(Float64(1.0 + Float64((Float64(Float64(2.0 * l) / Om) ^ 2.0) * Float64((sin(kx) ^ 2.0) + (sin(ky) ^ 2.0)))))))))
end
function tmp = code(l, Om, kx, ky)
	tmp = sqrt(((1.0 / 2.0) * (1.0 + (1.0 / sqrt((1.0 + ((((2.0 * l) / Om) ^ 2.0) * ((sin(kx) ^ 2.0) + (sin(ky) ^ 2.0)))))))));
end
code[l_, Om_, kx_, ky_] := N[Sqrt[N[(N[(1.0 / 2.0), $MachinePrecision] * N[(1.0 + N[(1.0 / N[Sqrt[N[(1.0 + N[(N[Power[N[(N[(2.0 * l), $MachinePrecision] / Om), $MachinePrecision], 2.0], $MachinePrecision] * N[(N[Power[N[Sin[kx], $MachinePrecision], 2.0], $MachinePrecision] + N[Power[N[Sin[ky], $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]
\begin{array}{l}

\\
\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\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 6 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: 98.2% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)} \end{array} \]
(FPCore (l Om kx ky)
 :precision binary64
 (sqrt
  (*
   (/ 1.0 2.0)
   (+
    1.0
    (/
     1.0
     (sqrt
      (+
       1.0
       (*
        (pow (/ (* 2.0 l) Om) 2.0)
        (+ (pow (sin kx) 2.0) (pow (sin ky) 2.0))))))))))
double code(double l, double Om, double kx, double ky) {
	return sqrt(((1.0 / 2.0) * (1.0 + (1.0 / sqrt((1.0 + (pow(((2.0 * l) / Om), 2.0) * (pow(sin(kx), 2.0) + pow(sin(ky), 2.0)))))))));
}
real(8) function code(l, om, kx, ky)
    real(8), intent (in) :: l
    real(8), intent (in) :: om
    real(8), intent (in) :: kx
    real(8), intent (in) :: ky
    code = sqrt(((1.0d0 / 2.0d0) * (1.0d0 + (1.0d0 / sqrt((1.0d0 + ((((2.0d0 * l) / om) ** 2.0d0) * ((sin(kx) ** 2.0d0) + (sin(ky) ** 2.0d0)))))))))
end function
public static double code(double l, double Om, double kx, double ky) {
	return Math.sqrt(((1.0 / 2.0) * (1.0 + (1.0 / Math.sqrt((1.0 + (Math.pow(((2.0 * l) / Om), 2.0) * (Math.pow(Math.sin(kx), 2.0) + Math.pow(Math.sin(ky), 2.0)))))))));
}
def code(l, Om, kx, ky):
	return math.sqrt(((1.0 / 2.0) * (1.0 + (1.0 / math.sqrt((1.0 + (math.pow(((2.0 * l) / Om), 2.0) * (math.pow(math.sin(kx), 2.0) + math.pow(math.sin(ky), 2.0)))))))))
function code(l, Om, kx, ky)
	return sqrt(Float64(Float64(1.0 / 2.0) * Float64(1.0 + Float64(1.0 / sqrt(Float64(1.0 + Float64((Float64(Float64(2.0 * l) / Om) ^ 2.0) * Float64((sin(kx) ^ 2.0) + (sin(ky) ^ 2.0)))))))))
end
function tmp = code(l, Om, kx, ky)
	tmp = sqrt(((1.0 / 2.0) * (1.0 + (1.0 / sqrt((1.0 + ((((2.0 * l) / Om) ^ 2.0) * ((sin(kx) ^ 2.0) + (sin(ky) ^ 2.0)))))))));
end
code[l_, Om_, kx_, ky_] := N[Sqrt[N[(N[(1.0 / 2.0), $MachinePrecision] * N[(1.0 + N[(1.0 / N[Sqrt[N[(1.0 + N[(N[Power[N[(N[(2.0 * l), $MachinePrecision] / Om), $MachinePrecision], 2.0], $MachinePrecision] * N[(N[Power[N[Sin[kx], $MachinePrecision], 2.0], $MachinePrecision] + N[Power[N[Sin[ky], $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]
\begin{array}{l}

\\
\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)}
\end{array}

Alternative 1: 98.2% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)} \end{array} \]
(FPCore (l Om kx ky)
 :precision binary64
 (sqrt
  (*
   (/ 1.0 2.0)
   (+
    1.0
    (/
     1.0
     (sqrt
      (+
       1.0
       (*
        (pow (/ (* 2.0 l) Om) 2.0)
        (+ (pow (sin kx) 2.0) (pow (sin ky) 2.0))))))))))
double code(double l, double Om, double kx, double ky) {
	return sqrt(((1.0 / 2.0) * (1.0 + (1.0 / sqrt((1.0 + (pow(((2.0 * l) / Om), 2.0) * (pow(sin(kx), 2.0) + pow(sin(ky), 2.0)))))))));
}
real(8) function code(l, om, kx, ky)
    real(8), intent (in) :: l
    real(8), intent (in) :: om
    real(8), intent (in) :: kx
    real(8), intent (in) :: ky
    code = sqrt(((1.0d0 / 2.0d0) * (1.0d0 + (1.0d0 / sqrt((1.0d0 + ((((2.0d0 * l) / om) ** 2.0d0) * ((sin(kx) ** 2.0d0) + (sin(ky) ** 2.0d0)))))))))
end function
public static double code(double l, double Om, double kx, double ky) {
	return Math.sqrt(((1.0 / 2.0) * (1.0 + (1.0 / Math.sqrt((1.0 + (Math.pow(((2.0 * l) / Om), 2.0) * (Math.pow(Math.sin(kx), 2.0) + Math.pow(Math.sin(ky), 2.0)))))))));
}
def code(l, Om, kx, ky):
	return math.sqrt(((1.0 / 2.0) * (1.0 + (1.0 / math.sqrt((1.0 + (math.pow(((2.0 * l) / Om), 2.0) * (math.pow(math.sin(kx), 2.0) + math.pow(math.sin(ky), 2.0)))))))))
function code(l, Om, kx, ky)
	return sqrt(Float64(Float64(1.0 / 2.0) * Float64(1.0 + Float64(1.0 / sqrt(Float64(1.0 + Float64((Float64(Float64(2.0 * l) / Om) ^ 2.0) * Float64((sin(kx) ^ 2.0) + (sin(ky) ^ 2.0)))))))))
end
function tmp = code(l, Om, kx, ky)
	tmp = sqrt(((1.0 / 2.0) * (1.0 + (1.0 / sqrt((1.0 + ((((2.0 * l) / Om) ^ 2.0) * ((sin(kx) ^ 2.0) + (sin(ky) ^ 2.0)))))))));
end
code[l_, Om_, kx_, ky_] := N[Sqrt[N[(N[(1.0 / 2.0), $MachinePrecision] * N[(1.0 + N[(1.0 / N[Sqrt[N[(1.0 + N[(N[Power[N[(N[(2.0 * l), $MachinePrecision] / Om), $MachinePrecision], 2.0], $MachinePrecision] * N[(N[Power[N[Sin[kx], $MachinePrecision], 2.0], $MachinePrecision] + N[Power[N[Sin[ky], $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]
\begin{array}{l}

\\
\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)}
\end{array}
Derivation
  1. Initial program 98.6%

    \[\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)} \]
  2. Add Preprocessing
  3. Add Preprocessing

Alternative 2: 93.1% accurate, 1.7× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;\frac{2 \cdot \ell}{Om} \leq 10^{+123}:\\ \;\;\;\;\sqrt{0.5 + \frac{0.5}{\sqrt{1 + \frac{\frac{\ell}{Om} \cdot 4}{\frac{Om}{\ell}} \cdot \left(1 + -0.5 \cdot \left(\cos \left(2 \cdot kx\right) + \cos \left(2 \cdot ky\right)\right)\right)}}}\\ \mathbf{else}:\\ \;\;\;\;\sqrt{0.5 + 0.25 \cdot \frac{Om}{\ell \cdot \sin ky}}\\ \end{array} \end{array} \]
(FPCore (l Om kx ky)
 :precision binary64
 (if (<= (/ (* 2.0 l) Om) 1e+123)
   (sqrt
    (+
     0.5
     (/
      0.5
      (sqrt
       (+
        1.0
        (*
         (/ (* (/ l Om) 4.0) (/ Om l))
         (+ 1.0 (* -0.5 (+ (cos (* 2.0 kx)) (cos (* 2.0 ky)))))))))))
   (sqrt (+ 0.5 (* 0.25 (/ Om (* l (sin ky))))))))
double code(double l, double Om, double kx, double ky) {
	double tmp;
	if (((2.0 * l) / Om) <= 1e+123) {
		tmp = sqrt((0.5 + (0.5 / sqrt((1.0 + ((((l / Om) * 4.0) / (Om / l)) * (1.0 + (-0.5 * (cos((2.0 * kx)) + cos((2.0 * ky)))))))))));
	} else {
		tmp = sqrt((0.5 + (0.25 * (Om / (l * sin(ky))))));
	}
	return tmp;
}
real(8) function code(l, om, kx, ky)
    real(8), intent (in) :: l
    real(8), intent (in) :: om
    real(8), intent (in) :: kx
    real(8), intent (in) :: ky
    real(8) :: tmp
    if (((2.0d0 * l) / om) <= 1d+123) then
        tmp = sqrt((0.5d0 + (0.5d0 / sqrt((1.0d0 + ((((l / om) * 4.0d0) / (om / l)) * (1.0d0 + ((-0.5d0) * (cos((2.0d0 * kx)) + cos((2.0d0 * ky)))))))))))
    else
        tmp = sqrt((0.5d0 + (0.25d0 * (om / (l * sin(ky))))))
    end if
    code = tmp
end function
public static double code(double l, double Om, double kx, double ky) {
	double tmp;
	if (((2.0 * l) / Om) <= 1e+123) {
		tmp = Math.sqrt((0.5 + (0.5 / Math.sqrt((1.0 + ((((l / Om) * 4.0) / (Om / l)) * (1.0 + (-0.5 * (Math.cos((2.0 * kx)) + Math.cos((2.0 * ky)))))))))));
	} else {
		tmp = Math.sqrt((0.5 + (0.25 * (Om / (l * Math.sin(ky))))));
	}
	return tmp;
}
def code(l, Om, kx, ky):
	tmp = 0
	if ((2.0 * l) / Om) <= 1e+123:
		tmp = math.sqrt((0.5 + (0.5 / math.sqrt((1.0 + ((((l / Om) * 4.0) / (Om / l)) * (1.0 + (-0.5 * (math.cos((2.0 * kx)) + math.cos((2.0 * ky)))))))))))
	else:
		tmp = math.sqrt((0.5 + (0.25 * (Om / (l * math.sin(ky))))))
	return tmp
function code(l, Om, kx, ky)
	tmp = 0.0
	if (Float64(Float64(2.0 * l) / Om) <= 1e+123)
		tmp = sqrt(Float64(0.5 + Float64(0.5 / sqrt(Float64(1.0 + Float64(Float64(Float64(Float64(l / Om) * 4.0) / Float64(Om / l)) * Float64(1.0 + Float64(-0.5 * Float64(cos(Float64(2.0 * kx)) + cos(Float64(2.0 * ky)))))))))));
	else
		tmp = sqrt(Float64(0.5 + Float64(0.25 * Float64(Om / Float64(l * sin(ky))))));
	end
	return tmp
end
function tmp_2 = code(l, Om, kx, ky)
	tmp = 0.0;
	if (((2.0 * l) / Om) <= 1e+123)
		tmp = sqrt((0.5 + (0.5 / sqrt((1.0 + ((((l / Om) * 4.0) / (Om / l)) * (1.0 + (-0.5 * (cos((2.0 * kx)) + cos((2.0 * ky)))))))))));
	else
		tmp = sqrt((0.5 + (0.25 * (Om / (l * sin(ky))))));
	end
	tmp_2 = tmp;
end
code[l_, Om_, kx_, ky_] := If[LessEqual[N[(N[(2.0 * l), $MachinePrecision] / Om), $MachinePrecision], 1e+123], N[Sqrt[N[(0.5 + N[(0.5 / N[Sqrt[N[(1.0 + N[(N[(N[(N[(l / Om), $MachinePrecision] * 4.0), $MachinePrecision] / N[(Om / l), $MachinePrecision]), $MachinePrecision] * N[(1.0 + N[(-0.5 * N[(N[Cos[N[(2.0 * kx), $MachinePrecision]], $MachinePrecision] + N[Cos[N[(2.0 * ky), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision], N[Sqrt[N[(0.5 + N[(0.25 * N[(Om / N[(l * N[Sin[ky], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;\frac{2 \cdot \ell}{Om} \leq 10^{+123}:\\
\;\;\;\;\sqrt{0.5 + \frac{0.5}{\sqrt{1 + \frac{\frac{\ell}{Om} \cdot 4}{\frac{Om}{\ell}} \cdot \left(1 + -0.5 \cdot \left(\cos \left(2 \cdot kx\right) + \cos \left(2 \cdot ky\right)\right)\right)}}}\\

\mathbf{else}:\\
\;\;\;\;\sqrt{0.5 + 0.25 \cdot \frac{Om}{\ell \cdot \sin ky}}\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if (/.f64 (*.f64 #s(literal 2 binary64) l) Om) < 9.99999999999999978e122

    1. Initial program 99.7%

      \[\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)} \]
    2. Add Preprocessing
    3. Applied egg-rr95.0%

      \[\leadsto \sqrt{\color{blue}{\frac{0.5}{\sqrt{1 + \frac{\frac{\ell}{Om} \cdot 4}{\frac{Om}{\ell}} \cdot \left(\left(0.5 + -0.5 \cdot \cos \left(2 \cdot kx\right)\right) + \left(0.5 + -0.5 \cdot \cos \left(2 \cdot ky\right)\right)\right)}} + 0.5}} \]
    4. Taylor expanded in kx around inf

      \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \color{blue}{\left(1 + \left(\frac{-1}{2} \cdot \cos \left(2 \cdot kx\right) + \frac{-1}{2} \cdot \cos \left(2 \cdot ky\right)\right)\right)}\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
    5. Step-by-step derivation
      1. +-lowering-+.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(1, \left(\frac{-1}{2} \cdot \cos \left(2 \cdot kx\right) + \frac{-1}{2} \cdot \cos \left(2 \cdot ky\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
      2. distribute-lft-outN/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(1, \left(\frac{-1}{2} \cdot \left(\cos \left(2 \cdot kx\right) + \cos \left(2 \cdot ky\right)\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
      3. *-lowering-*.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\frac{-1}{2}, \left(\cos \left(2 \cdot kx\right) + \cos \left(2 \cdot ky\right)\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
      4. +-lowering-+.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\frac{-1}{2}, \mathsf{+.f64}\left(\cos \left(2 \cdot kx\right), \cos \left(2 \cdot ky\right)\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
      5. cos-lowering-cos.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\frac{-1}{2}, \mathsf{+.f64}\left(\mathsf{cos.f64}\left(\left(2 \cdot kx\right)\right), \cos \left(2 \cdot ky\right)\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
      6. *-lowering-*.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\frac{-1}{2}, \mathsf{+.f64}\left(\mathsf{cos.f64}\left(\mathsf{*.f64}\left(2, kx\right)\right), \cos \left(2 \cdot ky\right)\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
      7. cos-lowering-cos.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\frac{-1}{2}, \mathsf{+.f64}\left(\mathsf{cos.f64}\left(\mathsf{*.f64}\left(2, kx\right)\right), \mathsf{cos.f64}\left(\left(2 \cdot ky\right)\right)\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
      8. *-lowering-*.f6495.0%

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\frac{-1}{2}, \mathsf{+.f64}\left(\mathsf{cos.f64}\left(\mathsf{*.f64}\left(2, kx\right)\right), \mathsf{cos.f64}\left(\mathsf{*.f64}\left(2, ky\right)\right)\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
    6. Simplified95.0%

      \[\leadsto \sqrt{\frac{0.5}{\sqrt{1 + \frac{\frac{\ell}{Om} \cdot 4}{\frac{Om}{\ell}} \cdot \color{blue}{\left(1 + -0.5 \cdot \left(\cos \left(2 \cdot kx\right) + \cos \left(2 \cdot ky\right)\right)\right)}}} + 0.5} \]

    if 9.99999999999999978e122 < (/.f64 (*.f64 #s(literal 2 binary64) l) Om)

    1. Initial program 92.9%

      \[\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)} \]
    2. Add Preprocessing
    3. Taylor expanded in kx around 0

      \[\leadsto \mathsf{sqrt.f64}\left(\color{blue}{\left(\frac{1}{2} \cdot \left(1 + \sqrt{\frac{1}{1 + 4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}}}\right)\right)}\right) \]
    4. Step-by-step derivation
      1. distribute-lft-inN/A

        \[\leadsto \mathsf{sqrt.f64}\left(\left(\frac{1}{2} \cdot 1 + \frac{1}{2} \cdot \sqrt{\frac{1}{1 + 4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}}}\right)\right) \]
      2. metadata-evalN/A

        \[\leadsto \mathsf{sqrt.f64}\left(\left(\frac{1}{2} + \frac{1}{2} \cdot \sqrt{\frac{1}{1 + 4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}}}\right)\right) \]
      3. +-lowering-+.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \left(\frac{1}{2} \cdot \sqrt{\frac{1}{1 + 4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}}}\right)\right)\right) \]
      4. *-lowering-*.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{2}, \left(\sqrt{\frac{1}{1 + 4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}}}\right)\right)\right)\right) \]
      5. sqrt-lowering-sqrt.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\left(\frac{1}{1 + 4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}}\right)\right)\right)\right)\right) \]
      6. /-lowering-/.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{/.f64}\left(1, \left(1 + 4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}\right)\right)\right)\right)\right)\right) \]
      7. +-lowering-+.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{/.f64}\left(1, \mathsf{+.f64}\left(1, \left(4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}\right)\right)\right)\right)\right)\right)\right) \]
      8. associate-*r/N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{/.f64}\left(1, \mathsf{+.f64}\left(1, \left(\frac{4 \cdot \left({\ell}^{2} \cdot {\sin ky}^{2}\right)}{{Om}^{2}}\right)\right)\right)\right)\right)\right)\right) \]
      9. /-lowering-/.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{/.f64}\left(1, \mathsf{+.f64}\left(1, \mathsf{/.f64}\left(\left(4 \cdot \left({\ell}^{2} \cdot {\sin ky}^{2}\right)\right), \left({Om}^{2}\right)\right)\right)\right)\right)\right)\right)\right) \]
    5. Simplified81.4%

      \[\leadsto \sqrt{\color{blue}{0.5 + 0.5 \cdot \sqrt{\frac{1}{1 + \frac{4 \cdot \left(\left(\ell \cdot \ell\right) \cdot {\sin ky}^{2}\right)}{Om \cdot Om}}}}} \]
    6. Taylor expanded in l around inf

      \[\leadsto \mathsf{sqrt.f64}\left(\color{blue}{\left(\frac{1}{2} + \frac{1}{4} \cdot \frac{Om}{\ell \cdot \sin ky}\right)}\right) \]
    7. Step-by-step derivation
      1. +-lowering-+.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \left(\frac{1}{4} \cdot \frac{Om}{\ell \cdot \sin ky}\right)\right)\right) \]
      2. *-lowering-*.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{4}, \left(\frac{Om}{\ell \cdot \sin ky}\right)\right)\right)\right) \]
      3. /-lowering-/.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{4}, \mathsf{/.f64}\left(Om, \left(\ell \cdot \sin ky\right)\right)\right)\right)\right) \]
      4. *-lowering-*.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{4}, \mathsf{/.f64}\left(Om, \mathsf{*.f64}\left(\ell, \sin ky\right)\right)\right)\right)\right) \]
      5. sin-lowering-sin.f6490.6%

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{4}, \mathsf{/.f64}\left(Om, \mathsf{*.f64}\left(\ell, \mathsf{sin.f64}\left(ky\right)\right)\right)\right)\right)\right) \]
    8. Simplified90.6%

      \[\leadsto \sqrt{\color{blue}{0.5 + 0.25 \cdot \frac{Om}{\ell \cdot \sin ky}}} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification94.2%

    \[\leadsto \begin{array}{l} \mathbf{if}\;\frac{2 \cdot \ell}{Om} \leq 10^{+123}:\\ \;\;\;\;\sqrt{0.5 + \frac{0.5}{\sqrt{1 + \frac{\frac{\ell}{Om} \cdot 4}{\frac{Om}{\ell}} \cdot \left(1 + -0.5 \cdot \left(\cos \left(2 \cdot kx\right) + \cos \left(2 \cdot ky\right)\right)\right)}}}\\ \mathbf{else}:\\ \;\;\;\;\sqrt{0.5 + 0.25 \cdot \frac{Om}{\ell \cdot \sin ky}}\\ \end{array} \]
  5. Add Preprocessing

Alternative 3: 85.7% accurate, 2.2× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;\frac{2 \cdot \ell}{Om} \leq 10^{+123}:\\ \;\;\;\;\sqrt{0.5 + \frac{0.5}{\sqrt{1 + \frac{\frac{\ell}{Om} \cdot 4}{\frac{Om}{\ell}} \cdot \left(0.5 + -0.5 \cdot \cos \left(2 \cdot ky\right)\right)}}}\\ \mathbf{else}:\\ \;\;\;\;\sqrt{0.5 + 0.25 \cdot \frac{Om}{\ell \cdot \sin ky}}\\ \end{array} \end{array} \]
(FPCore (l Om kx ky)
 :precision binary64
 (if (<= (/ (* 2.0 l) Om) 1e+123)
   (sqrt
    (+
     0.5
     (/
      0.5
      (sqrt
       (+
        1.0
        (*
         (/ (* (/ l Om) 4.0) (/ Om l))
         (+ 0.5 (* -0.5 (cos (* 2.0 ky))))))))))
   (sqrt (+ 0.5 (* 0.25 (/ Om (* l (sin ky))))))))
double code(double l, double Om, double kx, double ky) {
	double tmp;
	if (((2.0 * l) / Om) <= 1e+123) {
		tmp = sqrt((0.5 + (0.5 / sqrt((1.0 + ((((l / Om) * 4.0) / (Om / l)) * (0.5 + (-0.5 * cos((2.0 * ky))))))))));
	} else {
		tmp = sqrt((0.5 + (0.25 * (Om / (l * sin(ky))))));
	}
	return tmp;
}
real(8) function code(l, om, kx, ky)
    real(8), intent (in) :: l
    real(8), intent (in) :: om
    real(8), intent (in) :: kx
    real(8), intent (in) :: ky
    real(8) :: tmp
    if (((2.0d0 * l) / om) <= 1d+123) then
        tmp = sqrt((0.5d0 + (0.5d0 / sqrt((1.0d0 + ((((l / om) * 4.0d0) / (om / l)) * (0.5d0 + ((-0.5d0) * cos((2.0d0 * ky))))))))))
    else
        tmp = sqrt((0.5d0 + (0.25d0 * (om / (l * sin(ky))))))
    end if
    code = tmp
end function
public static double code(double l, double Om, double kx, double ky) {
	double tmp;
	if (((2.0 * l) / Om) <= 1e+123) {
		tmp = Math.sqrt((0.5 + (0.5 / Math.sqrt((1.0 + ((((l / Om) * 4.0) / (Om / l)) * (0.5 + (-0.5 * Math.cos((2.0 * ky))))))))));
	} else {
		tmp = Math.sqrt((0.5 + (0.25 * (Om / (l * Math.sin(ky))))));
	}
	return tmp;
}
def code(l, Om, kx, ky):
	tmp = 0
	if ((2.0 * l) / Om) <= 1e+123:
		tmp = math.sqrt((0.5 + (0.5 / math.sqrt((1.0 + ((((l / Om) * 4.0) / (Om / l)) * (0.5 + (-0.5 * math.cos((2.0 * ky))))))))))
	else:
		tmp = math.sqrt((0.5 + (0.25 * (Om / (l * math.sin(ky))))))
	return tmp
function code(l, Om, kx, ky)
	tmp = 0.0
	if (Float64(Float64(2.0 * l) / Om) <= 1e+123)
		tmp = sqrt(Float64(0.5 + Float64(0.5 / sqrt(Float64(1.0 + Float64(Float64(Float64(Float64(l / Om) * 4.0) / Float64(Om / l)) * Float64(0.5 + Float64(-0.5 * cos(Float64(2.0 * ky))))))))));
	else
		tmp = sqrt(Float64(0.5 + Float64(0.25 * Float64(Om / Float64(l * sin(ky))))));
	end
	return tmp
end
function tmp_2 = code(l, Om, kx, ky)
	tmp = 0.0;
	if (((2.0 * l) / Om) <= 1e+123)
		tmp = sqrt((0.5 + (0.5 / sqrt((1.0 + ((((l / Om) * 4.0) / (Om / l)) * (0.5 + (-0.5 * cos((2.0 * ky))))))))));
	else
		tmp = sqrt((0.5 + (0.25 * (Om / (l * sin(ky))))));
	end
	tmp_2 = tmp;
end
code[l_, Om_, kx_, ky_] := If[LessEqual[N[(N[(2.0 * l), $MachinePrecision] / Om), $MachinePrecision], 1e+123], N[Sqrt[N[(0.5 + N[(0.5 / N[Sqrt[N[(1.0 + N[(N[(N[(N[(l / Om), $MachinePrecision] * 4.0), $MachinePrecision] / N[(Om / l), $MachinePrecision]), $MachinePrecision] * N[(0.5 + N[(-0.5 * N[Cos[N[(2.0 * ky), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision], N[Sqrt[N[(0.5 + N[(0.25 * N[(Om / N[(l * N[Sin[ky], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;\frac{2 \cdot \ell}{Om} \leq 10^{+123}:\\
\;\;\;\;\sqrt{0.5 + \frac{0.5}{\sqrt{1 + \frac{\frac{\ell}{Om} \cdot 4}{\frac{Om}{\ell}} \cdot \left(0.5 + -0.5 \cdot \cos \left(2 \cdot ky\right)\right)}}}\\

\mathbf{else}:\\
\;\;\;\;\sqrt{0.5 + 0.25 \cdot \frac{Om}{\ell \cdot \sin ky}}\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if (/.f64 (*.f64 #s(literal 2 binary64) l) Om) < 9.99999999999999978e122

    1. Initial program 99.7%

      \[\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)} \]
    2. Add Preprocessing
    3. Applied egg-rr95.0%

      \[\leadsto \sqrt{\color{blue}{\frac{0.5}{\sqrt{1 + \frac{\frac{\ell}{Om} \cdot 4}{\frac{Om}{\ell}} \cdot \left(\left(0.5 + -0.5 \cdot \cos \left(2 \cdot kx\right)\right) + \left(0.5 + -0.5 \cdot \cos \left(2 \cdot ky\right)\right)\right)}} + 0.5}} \]
    4. Taylor expanded in kx around 0

      \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \color{blue}{\left(\frac{1}{2} + \frac{-1}{2} \cdot \cos \left(2 \cdot ky\right)\right)}\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
    5. Step-by-step derivation
      1. +-lowering-+.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(\frac{1}{2}, \left(\frac{-1}{2} \cdot \cos \left(2 \cdot ky\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
      2. *-lowering-*.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{-1}{2}, \cos \left(2 \cdot ky\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
      3. cos-lowering-cos.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{-1}{2}, \mathsf{cos.f64}\left(\left(2 \cdot ky\right)\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
      4. *-lowering-*.f6486.7%

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{-1}{2}, \mathsf{cos.f64}\left(\mathsf{*.f64}\left(2, ky\right)\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
    6. Simplified86.7%

      \[\leadsto \sqrt{\frac{0.5}{\sqrt{1 + \frac{\frac{\ell}{Om} \cdot 4}{\frac{Om}{\ell}} \cdot \color{blue}{\left(0.5 + -0.5 \cdot \cos \left(2 \cdot ky\right)\right)}}} + 0.5} \]

    if 9.99999999999999978e122 < (/.f64 (*.f64 #s(literal 2 binary64) l) Om)

    1. Initial program 92.9%

      \[\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)} \]
    2. Add Preprocessing
    3. Taylor expanded in kx around 0

      \[\leadsto \mathsf{sqrt.f64}\left(\color{blue}{\left(\frac{1}{2} \cdot \left(1 + \sqrt{\frac{1}{1 + 4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}}}\right)\right)}\right) \]
    4. Step-by-step derivation
      1. distribute-lft-inN/A

        \[\leadsto \mathsf{sqrt.f64}\left(\left(\frac{1}{2} \cdot 1 + \frac{1}{2} \cdot \sqrt{\frac{1}{1 + 4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}}}\right)\right) \]
      2. metadata-evalN/A

        \[\leadsto \mathsf{sqrt.f64}\left(\left(\frac{1}{2} + \frac{1}{2} \cdot \sqrt{\frac{1}{1 + 4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}}}\right)\right) \]
      3. +-lowering-+.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \left(\frac{1}{2} \cdot \sqrt{\frac{1}{1 + 4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}}}\right)\right)\right) \]
      4. *-lowering-*.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{2}, \left(\sqrt{\frac{1}{1 + 4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}}}\right)\right)\right)\right) \]
      5. sqrt-lowering-sqrt.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\left(\frac{1}{1 + 4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}}\right)\right)\right)\right)\right) \]
      6. /-lowering-/.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{/.f64}\left(1, \left(1 + 4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}\right)\right)\right)\right)\right)\right) \]
      7. +-lowering-+.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{/.f64}\left(1, \mathsf{+.f64}\left(1, \left(4 \cdot \frac{{\ell}^{2} \cdot {\sin ky}^{2}}{{Om}^{2}}\right)\right)\right)\right)\right)\right)\right) \]
      8. associate-*r/N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{/.f64}\left(1, \mathsf{+.f64}\left(1, \left(\frac{4 \cdot \left({\ell}^{2} \cdot {\sin ky}^{2}\right)}{{Om}^{2}}\right)\right)\right)\right)\right)\right)\right) \]
      9. /-lowering-/.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{/.f64}\left(1, \mathsf{+.f64}\left(1, \mathsf{/.f64}\left(\left(4 \cdot \left({\ell}^{2} \cdot {\sin ky}^{2}\right)\right), \left({Om}^{2}\right)\right)\right)\right)\right)\right)\right)\right) \]
    5. Simplified81.4%

      \[\leadsto \sqrt{\color{blue}{0.5 + 0.5 \cdot \sqrt{\frac{1}{1 + \frac{4 \cdot \left(\left(\ell \cdot \ell\right) \cdot {\sin ky}^{2}\right)}{Om \cdot Om}}}}} \]
    6. Taylor expanded in l around inf

      \[\leadsto \mathsf{sqrt.f64}\left(\color{blue}{\left(\frac{1}{2} + \frac{1}{4} \cdot \frac{Om}{\ell \cdot \sin ky}\right)}\right) \]
    7. Step-by-step derivation
      1. +-lowering-+.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \left(\frac{1}{4} \cdot \frac{Om}{\ell \cdot \sin ky}\right)\right)\right) \]
      2. *-lowering-*.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{4}, \left(\frac{Om}{\ell \cdot \sin ky}\right)\right)\right)\right) \]
      3. /-lowering-/.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{4}, \mathsf{/.f64}\left(Om, \left(\ell \cdot \sin ky\right)\right)\right)\right)\right) \]
      4. *-lowering-*.f64N/A

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{4}, \mathsf{/.f64}\left(Om, \mathsf{*.f64}\left(\ell, \sin ky\right)\right)\right)\right)\right) \]
      5. sin-lowering-sin.f6490.6%

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{1}{4}, \mathsf{/.f64}\left(Om, \mathsf{*.f64}\left(\ell, \mathsf{sin.f64}\left(ky\right)\right)\right)\right)\right)\right) \]
    8. Simplified90.6%

      \[\leadsto \sqrt{\color{blue}{0.5 + 0.25 \cdot \frac{Om}{\ell \cdot \sin ky}}} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification87.3%

    \[\leadsto \begin{array}{l} \mathbf{if}\;\frac{2 \cdot \ell}{Om} \leq 10^{+123}:\\ \;\;\;\;\sqrt{0.5 + \frac{0.5}{\sqrt{1 + \frac{\frac{\ell}{Om} \cdot 4}{\frac{Om}{\ell}} \cdot \left(0.5 + -0.5 \cdot \cos \left(2 \cdot ky\right)\right)}}}\\ \mathbf{else}:\\ \;\;\;\;\sqrt{0.5 + 0.25 \cdot \frac{Om}{\ell \cdot \sin ky}}\\ \end{array} \]
  5. Add Preprocessing

Alternative 4: 69.8% accurate, 3.2× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;\ell \leq 5 \cdot 10^{-76}:\\ \;\;\;\;1\\ \mathbf{else}:\\ \;\;\;\;\sqrt{0.5 + \frac{0.5}{\sqrt{1 + 4 \cdot \left(\frac{\ell \cdot \ell}{Om} \cdot \frac{ky \cdot ky}{Om}\right)}}}\\ \end{array} \end{array} \]
(FPCore (l Om kx ky)
 :precision binary64
 (if (<= l 5e-76)
   1.0
   (sqrt
    (+
     0.5
     (/ 0.5 (sqrt (+ 1.0 (* 4.0 (* (/ (* l l) Om) (/ (* ky ky) Om))))))))))
double code(double l, double Om, double kx, double ky) {
	double tmp;
	if (l <= 5e-76) {
		tmp = 1.0;
	} else {
		tmp = sqrt((0.5 + (0.5 / sqrt((1.0 + (4.0 * (((l * l) / Om) * ((ky * ky) / Om))))))));
	}
	return tmp;
}
real(8) function code(l, om, kx, ky)
    real(8), intent (in) :: l
    real(8), intent (in) :: om
    real(8), intent (in) :: kx
    real(8), intent (in) :: ky
    real(8) :: tmp
    if (l <= 5d-76) then
        tmp = 1.0d0
    else
        tmp = sqrt((0.5d0 + (0.5d0 / sqrt((1.0d0 + (4.0d0 * (((l * l) / om) * ((ky * ky) / om))))))))
    end if
    code = tmp
end function
public static double code(double l, double Om, double kx, double ky) {
	double tmp;
	if (l <= 5e-76) {
		tmp = 1.0;
	} else {
		tmp = Math.sqrt((0.5 + (0.5 / Math.sqrt((1.0 + (4.0 * (((l * l) / Om) * ((ky * ky) / Om))))))));
	}
	return tmp;
}
def code(l, Om, kx, ky):
	tmp = 0
	if l <= 5e-76:
		tmp = 1.0
	else:
		tmp = math.sqrt((0.5 + (0.5 / math.sqrt((1.0 + (4.0 * (((l * l) / Om) * ((ky * ky) / Om))))))))
	return tmp
function code(l, Om, kx, ky)
	tmp = 0.0
	if (l <= 5e-76)
		tmp = 1.0;
	else
		tmp = sqrt(Float64(0.5 + Float64(0.5 / sqrt(Float64(1.0 + Float64(4.0 * Float64(Float64(Float64(l * l) / Om) * Float64(Float64(ky * ky) / Om))))))));
	end
	return tmp
end
function tmp_2 = code(l, Om, kx, ky)
	tmp = 0.0;
	if (l <= 5e-76)
		tmp = 1.0;
	else
		tmp = sqrt((0.5 + (0.5 / sqrt((1.0 + (4.0 * (((l * l) / Om) * ((ky * ky) / Om))))))));
	end
	tmp_2 = tmp;
end
code[l_, Om_, kx_, ky_] := If[LessEqual[l, 5e-76], 1.0, N[Sqrt[N[(0.5 + N[(0.5 / N[Sqrt[N[(1.0 + N[(4.0 * N[(N[(N[(l * l), $MachinePrecision] / Om), $MachinePrecision] * N[(N[(ky * ky), $MachinePrecision] / Om), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;\ell \leq 5 \cdot 10^{-76}:\\
\;\;\;\;1\\

\mathbf{else}:\\
\;\;\;\;\sqrt{0.5 + \frac{0.5}{\sqrt{1 + 4 \cdot \left(\frac{\ell \cdot \ell}{Om} \cdot \frac{ky \cdot ky}{Om}\right)}}}\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if l < 4.9999999999999998e-76

    1. Initial program 98.8%

      \[\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)} \]
    2. Add Preprocessing
    3. Taylor expanded in l around 0

      \[\leadsto \mathsf{sqrt.f64}\left(\color{blue}{1}\right) \]
    4. Step-by-step derivation
      1. Simplified71.4%

        \[\leadsto \sqrt{\color{blue}{1}} \]
      2. Step-by-step derivation
        1. metadata-eval71.4%

          \[\leadsto 1 \]
      3. Applied egg-rr71.4%

        \[\leadsto \color{blue}{1} \]

      if 4.9999999999999998e-76 < l

      1. Initial program 98.1%

        \[\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)} \]
      2. Add Preprocessing
      3. Applied egg-rr88.6%

        \[\leadsto \sqrt{\color{blue}{\frac{0.5}{\sqrt{1 + \frac{\frac{\ell}{Om} \cdot 4}{\frac{Om}{\ell}} \cdot \left(\left(0.5 + -0.5 \cdot \cos \left(2 \cdot kx\right)\right) + \left(0.5 + -0.5 \cdot \cos \left(2 \cdot ky\right)\right)\right)}} + 0.5}} \]
      4. Taylor expanded in kx around 0

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \color{blue}{\left(\frac{1}{2} + \frac{-1}{2} \cdot \cos \left(2 \cdot ky\right)\right)}\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
      5. Step-by-step derivation
        1. +-lowering-+.f64N/A

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(\frac{1}{2}, \left(\frac{-1}{2} \cdot \cos \left(2 \cdot ky\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
        2. *-lowering-*.f64N/A

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{-1}{2}, \cos \left(2 \cdot ky\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
        3. cos-lowering-cos.f64N/A

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{-1}{2}, \mathsf{cos.f64}\left(\left(2 \cdot ky\right)\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
        4. *-lowering-*.f6473.3%

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\mathsf{/.f64}\left(\ell, Om\right), 4\right), \mathsf{/.f64}\left(Om, \ell\right)\right), \mathsf{+.f64}\left(\frac{1}{2}, \mathsf{*.f64}\left(\frac{-1}{2}, \mathsf{cos.f64}\left(\mathsf{*.f64}\left(2, ky\right)\right)\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
      6. Simplified73.3%

        \[\leadsto \sqrt{\frac{0.5}{\sqrt{1 + \frac{\frac{\ell}{Om} \cdot 4}{\frac{Om}{\ell}} \cdot \color{blue}{\left(0.5 + -0.5 \cdot \cos \left(2 \cdot ky\right)\right)}}} + 0.5} \]
      7. Taylor expanded in ky around 0

        \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \color{blue}{\left(4 \cdot \frac{{ky}^{2} \cdot {\ell}^{2}}{{Om}^{2}}\right)}\right)\right)\right), \frac{1}{2}\right)\right) \]
      8. Step-by-step derivation
        1. *-lowering-*.f64N/A

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(4, \left(\frac{{ky}^{2} \cdot {\ell}^{2}}{{Om}^{2}}\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
        2. *-commutativeN/A

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(4, \left(\frac{{\ell}^{2} \cdot {ky}^{2}}{{Om}^{2}}\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
        3. unpow2N/A

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(4, \left(\frac{{\ell}^{2} \cdot {ky}^{2}}{Om \cdot Om}\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
        4. times-fracN/A

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(4, \left(\frac{{\ell}^{2}}{Om} \cdot \frac{{ky}^{2}}{Om}\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
        5. *-lowering-*.f64N/A

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(4, \mathsf{*.f64}\left(\left(\frac{{\ell}^{2}}{Om}\right), \left(\frac{{ky}^{2}}{Om}\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
        6. /-lowering-/.f64N/A

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(4, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\left({\ell}^{2}\right), Om\right), \left(\frac{{ky}^{2}}{Om}\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
        7. unpow2N/A

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(4, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\left(\ell \cdot \ell\right), Om\right), \left(\frac{{ky}^{2}}{Om}\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
        8. *-lowering-*.f64N/A

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(4, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\ell, \ell\right), Om\right), \left(\frac{{ky}^{2}}{Om}\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
        9. /-lowering-/.f64N/A

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(4, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\ell, \ell\right), Om\right), \mathsf{/.f64}\left(\left({ky}^{2}\right), Om\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
        10. unpow2N/A

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(4, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\ell, \ell\right), Om\right), \mathsf{/.f64}\left(\left(ky \cdot ky\right), Om\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
        11. *-lowering-*.f6471.5%

          \[\leadsto \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(\mathsf{/.f64}\left(\frac{1}{2}, \mathsf{sqrt.f64}\left(\mathsf{+.f64}\left(1, \mathsf{*.f64}\left(4, \mathsf{*.f64}\left(\mathsf{/.f64}\left(\mathsf{*.f64}\left(\ell, \ell\right), Om\right), \mathsf{/.f64}\left(\mathsf{*.f64}\left(ky, ky\right), Om\right)\right)\right)\right)\right)\right), \frac{1}{2}\right)\right) \]
      9. Simplified71.5%

        \[\leadsto \sqrt{\frac{0.5}{\sqrt{1 + \color{blue}{4 \cdot \left(\frac{\ell \cdot \ell}{Om} \cdot \frac{ky \cdot ky}{Om}\right)}}} + 0.5} \]
    5. Recombined 2 regimes into one program.
    6. Final simplification71.4%

      \[\leadsto \begin{array}{l} \mathbf{if}\;\ell \leq 5 \cdot 10^{-76}:\\ \;\;\;\;1\\ \mathbf{else}:\\ \;\;\;\;\sqrt{0.5 + \frac{0.5}{\sqrt{1 + 4 \cdot \left(\frac{\ell \cdot \ell}{Om} \cdot \frac{ky \cdot ky}{Om}\right)}}}\\ \end{array} \]
    7. Add Preprocessing

    Alternative 5: 70.7% accurate, 6.8× speedup?

    \[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;\ell \leq 10^{+26}:\\ \;\;\;\;1\\ \mathbf{else}:\\ \;\;\;\;\sqrt{0.5}\\ \end{array} \end{array} \]
    (FPCore (l Om kx ky) :precision binary64 (if (<= l 1e+26) 1.0 (sqrt 0.5)))
    double code(double l, double Om, double kx, double ky) {
    	double tmp;
    	if (l <= 1e+26) {
    		tmp = 1.0;
    	} else {
    		tmp = sqrt(0.5);
    	}
    	return tmp;
    }
    
    real(8) function code(l, om, kx, ky)
        real(8), intent (in) :: l
        real(8), intent (in) :: om
        real(8), intent (in) :: kx
        real(8), intent (in) :: ky
        real(8) :: tmp
        if (l <= 1d+26) then
            tmp = 1.0d0
        else
            tmp = sqrt(0.5d0)
        end if
        code = tmp
    end function
    
    public static double code(double l, double Om, double kx, double ky) {
    	double tmp;
    	if (l <= 1e+26) {
    		tmp = 1.0;
    	} else {
    		tmp = Math.sqrt(0.5);
    	}
    	return tmp;
    }
    
    def code(l, Om, kx, ky):
    	tmp = 0
    	if l <= 1e+26:
    		tmp = 1.0
    	else:
    		tmp = math.sqrt(0.5)
    	return tmp
    
    function code(l, Om, kx, ky)
    	tmp = 0.0
    	if (l <= 1e+26)
    		tmp = 1.0;
    	else
    		tmp = sqrt(0.5);
    	end
    	return tmp
    end
    
    function tmp_2 = code(l, Om, kx, ky)
    	tmp = 0.0;
    	if (l <= 1e+26)
    		tmp = 1.0;
    	else
    		tmp = sqrt(0.5);
    	end
    	tmp_2 = tmp;
    end
    
    code[l_, Om_, kx_, ky_] := If[LessEqual[l, 1e+26], 1.0, N[Sqrt[0.5], $MachinePrecision]]
    
    \begin{array}{l}
    
    \\
    \begin{array}{l}
    \mathbf{if}\;\ell \leq 10^{+26}:\\
    \;\;\;\;1\\
    
    \mathbf{else}:\\
    \;\;\;\;\sqrt{0.5}\\
    
    
    \end{array}
    \end{array}
    
    Derivation
    1. Split input into 2 regimes
    2. if l < 1.00000000000000005e26

      1. Initial program 98.7%

        \[\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)} \]
      2. Add Preprocessing
      3. Taylor expanded in l around 0

        \[\leadsto \mathsf{sqrt.f64}\left(\color{blue}{1}\right) \]
      4. Step-by-step derivation
        1. Simplified70.8%

          \[\leadsto \sqrt{\color{blue}{1}} \]
        2. Step-by-step derivation
          1. metadata-eval70.8%

            \[\leadsto 1 \]
        3. Applied egg-rr70.8%

          \[\leadsto \color{blue}{1} \]

        if 1.00000000000000005e26 < l

        1. Initial program 98.1%

          \[\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)} \]
        2. Add Preprocessing
        3. Taylor expanded in l around inf

          \[\leadsto \mathsf{sqrt.f64}\left(\color{blue}{\frac{1}{2}}\right) \]
        4. Step-by-step derivation
          1. Simplified74.7%

            \[\leadsto \sqrt{\color{blue}{0.5}} \]
        5. Recombined 2 regimes into one program.
        6. Add Preprocessing

        Alternative 6: 62.6% accurate, 722.0× speedup?

        \[\begin{array}{l} \\ 1 \end{array} \]
        (FPCore (l Om kx ky) :precision binary64 1.0)
        double code(double l, double Om, double kx, double ky) {
        	return 1.0;
        }
        
        real(8) function code(l, om, kx, ky)
            real(8), intent (in) :: l
            real(8), intent (in) :: om
            real(8), intent (in) :: kx
            real(8), intent (in) :: ky
            code = 1.0d0
        end function
        
        public static double code(double l, double Om, double kx, double ky) {
        	return 1.0;
        }
        
        def code(l, Om, kx, ky):
        	return 1.0
        
        function code(l, Om, kx, ky)
        	return 1.0
        end
        
        function tmp = code(l, Om, kx, ky)
        	tmp = 1.0;
        end
        
        code[l_, Om_, kx_, ky_] := 1.0
        
        \begin{array}{l}
        
        \\
        1
        \end{array}
        
        Derivation
        1. Initial program 98.6%

          \[\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\sin kx}^{2} + {\sin ky}^{2}\right)}}\right)} \]
        2. Add Preprocessing
        3. Taylor expanded in l around 0

          \[\leadsto \mathsf{sqrt.f64}\left(\color{blue}{1}\right) \]
        4. Step-by-step derivation
          1. Simplified64.8%

            \[\leadsto \sqrt{\color{blue}{1}} \]
          2. Step-by-step derivation
            1. metadata-eval64.8%

              \[\leadsto 1 \]
          3. Applied egg-rr64.8%

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

          Reproduce

          ?
          herbie shell --seed 2024191 
          (FPCore (l Om kx ky)
            :name "Toniolo and Linder, Equation (3a)"
            :precision binary64
            (sqrt (* (/ 1.0 2.0) (+ 1.0 (/ 1.0 (sqrt (+ 1.0 (* (pow (/ (* 2.0 l) Om) 2.0) (+ (pow (sin kx) 2.0) (pow (sin ky) 2.0))))))))))