Maksimov and Kolovsky, Equation (4)

Percentage Accurate: 85.8% → 99.9%

Time: 4.5s

Alternatives: 13

Speedup: 1.2×

• 48.5% of points produce a very large (infinite) output. You may want to add a precondition.

Specification

Math

\[\begin{array}{l} \\ \left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \end{array} \]

FPCore

(FPCore (J l K U)
 :precision binary64
 (+ (* (* J (- (exp l) (exp (- l)))) (cos (/ K 2.0))) U))

C

double code(double J, double l, double K, double U) {
	return ((J * (exp(l) - exp(-l))) * cos((K / 2.0))) + U;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(j, l, k, u)
use fmin_fmax_functions
    real(8), intent (in) :: j
    real(8), intent (in) :: l
    real(8), intent (in) :: k
    real(8), intent (in) :: u
    code = ((j * (exp(l) - exp(-l))) * cos((k / 2.0d0))) + u
end function

Java

public static double code(double J, double l, double K, double U) {
	return ((J * (Math.exp(l) - Math.exp(-l))) * Math.cos((K / 2.0))) + U;
}

Python

def code(J, l, K, U):
	return ((J * (math.exp(l) - math.exp(-l))) * math.cos((K / 2.0))) + U

Julia

function code(J, l, K, U)
	return Float64(Float64(Float64(J * Float64(exp(l) - exp(Float64(-l)))) * cos(Float64(K / 2.0))) + U)
end

MATLAB

function tmp = code(J, l, K, U)
	tmp = ((J * (exp(l) - exp(-l))) * cos((K / 2.0))) + U;
end

Wolfram

code[J_, l_, K_, U_] := N[(N[(N[(J * N[(N[Exp[l], $MachinePrecision] - N[Exp[(-l)], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * N[Cos[N[(K / 2.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] + U), $MachinePrecision]

Initial Program: 85.8% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \end{array} \]

FPCore

(FPCore (J l K U)
 :precision binary64
 (+ (* (* J (- (exp l) (exp (- l)))) (cos (/ K 2.0))) U))

C

double code(double J, double l, double K, double U) {
	return ((J * (exp(l) - exp(-l))) * cos((K / 2.0))) + U;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(j, l, k, u)
use fmin_fmax_functions
    real(8), intent (in) :: j
    real(8), intent (in) :: l
    real(8), intent (in) :: k
    real(8), intent (in) :: u
    code = ((j * (exp(l) - exp(-l))) * cos((k / 2.0d0))) + u
end function

Java

public static double code(double J, double l, double K, double U) {
	return ((J * (Math.exp(l) - Math.exp(-l))) * Math.cos((K / 2.0))) + U;
}

Python

def code(J, l, K, U):
	return ((J * (math.exp(l) - math.exp(-l))) * math.cos((K / 2.0))) + U

Julia

function code(J, l, K, U)
	return Float64(Float64(Float64(J * Float64(exp(l) - exp(Float64(-l)))) * cos(Float64(K / 2.0))) + U)
end

MATLAB

function tmp = code(J, l, K, U)
	tmp = ((J * (exp(l) - exp(-l))) * cos((K / 2.0))) + U;
end

Wolfram

code[J_, l_, K_, U_] := N[(N[(N[(J * N[(N[Exp[l], $MachinePrecision] - N[Exp[(-l)], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * N[Cos[N[(K / 2.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] + U), $MachinePrecision]

Alternative 1: 99.9% accurate, 1.2× speedup

Math

\[\begin{array}{l} \\ \mathsf{fma}\left(\cos \left(K \cdot -0.5\right) \cdot \left(\sinh \ell \cdot 2\right), J, U\right) \end{array} \]

FPCore

(FPCore (J l K U)
 :precision binary64
 (fma (* (cos (* K -0.5)) (* (sinh l) 2.0)) J U))

C

double code(double J, double l, double K, double U) {
	return fma((cos((K * -0.5)) * (sinh(l) * 2.0)), J, U);
}

Julia

function code(J, l, K, U)
	return fma(Float64(cos(Float64(K * -0.5)) * Float64(sinh(l) * 2.0)), J, U)
end

Wolfram

code[J_, l_, K_, U_] := N[(N[(N[Cos[N[(K * -0.5), $MachinePrecision]], $MachinePrecision] * N[(N[Sinh[l], $MachinePrecision] * 2.0), $MachinePrecision]), $MachinePrecision] * J + U), $MachinePrecision]

Derivation

1. Initial program 85.8%

   \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
2. Step-by-step derivation

   1. lift-+.f64 N/A

      \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U} \]

   2. lift-*.f64 N/A

      \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right)} + U \]

   3. lift-*.f64 N/A

      \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   4. associate-*l* N/A

      \[\leadsto \color{blue}{J \cdot \left(\left(e^{\ell} - e^{-\ell}\right) \cdot \cos \left(\frac{K}{2}\right)\right)} + U \]

   5. *-commutative N/A

      \[\leadsto \color{blue}{\left(\left(e^{\ell} - e^{-\ell}\right) \cdot \cos \left(\frac{K}{2}\right)\right) \cdot J} + U \]

   6. lower-fma.f64 N/A

      \[\leadsto \color{blue}{\mathsf{fma}\left(\left(e^{\ell} - e^{-\ell}\right) \cdot \cos \left(\frac{K}{2}\right), J, U\right)} \]

3. Applied rewrites 99.9%

   \[\leadsto \color{blue}{\mathsf{fma}\left(\cos \left(K \cdot -0.5\right) \cdot \left(\sinh \ell \cdot 2\right), J, U\right)} \]
4. Add Preprocessing

Alternative 2: 99.9% accurate, 1.2× speedup

Math

\[\begin{array}{l} \\ \mathsf{fma}\left(\cos \left(K \cdot -0.5\right) \cdot J, \sinh \ell \cdot 2, U\right) \end{array} \]

FPCore

(FPCore (J l K U)
 :precision binary64
 (fma (* (cos (* K -0.5)) J) (* (sinh l) 2.0) U))

C

double code(double J, double l, double K, double U) {
	return fma((cos((K * -0.5)) * J), (sinh(l) * 2.0), U);
}

Julia

function code(J, l, K, U)
	return fma(Float64(cos(Float64(K * -0.5)) * J), Float64(sinh(l) * 2.0), U)
end

Wolfram

code[J_, l_, K_, U_] := N[(N[(N[Cos[N[(K * -0.5), $MachinePrecision]], $MachinePrecision] * J), $MachinePrecision] * N[(N[Sinh[l], $MachinePrecision] * 2.0), $MachinePrecision] + U), $MachinePrecision]

Derivation

1. Initial program 85.8%

   \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
2. Step-by-step derivation

   1. lift-+.f64 N/A

      \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U} \]

   2. lift-*.f64 N/A

      \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right)} + U \]

   3. *-commutative N/A

      \[\leadsto \color{blue}{\cos \left(\frac{K}{2}\right) \cdot \left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} + U \]

   4. lift-*.f64 N/A

      \[\leadsto \cos \left(\frac{K}{2}\right) \cdot \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} + U \]

   5. associate-*r* N/A

      \[\leadsto \color{blue}{\left(\cos \left(\frac{K}{2}\right) \cdot J\right) \cdot \left(e^{\ell} - e^{-\ell}\right)} + U \]

   6. lower-fma.f64 N/A

      \[\leadsto \color{blue}{\mathsf{fma}\left(\cos \left(\frac{K}{2}\right) \cdot J, e^{\ell} - e^{-\ell}, U\right)} \]

3. Applied rewrites 99.9%

   \[\leadsto \color{blue}{\mathsf{fma}\left(\cos \left(K \cdot -0.5\right) \cdot J, \sinh \ell \cdot 2, U\right)} \]
4. Add Preprocessing

Alternative 3: 89.4% accurate, 0.6× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \cos \left(\frac{K}{2}\right)\\ \mathbf{if}\;t\_0 \leq -0.08:\\ \;\;\;\;U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(-4.333333333333333 \cdot \ell - 4\right) - 2\right)\right)\\ \mathbf{elif}\;t\_0 \leq 0.9995:\\ \;\;\;\;U + J \cdot \left(e^{\ell} - e^{-\ell}\right)\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(\left(1 + -0.125 \cdot {K}^{2}\right) \cdot \left(\sinh \ell \cdot 2\right), J, U\right)\\ \end{array} \end{array} \]

FPCore

(FPCore (J l K U)
 :precision binary64
 (let* ((t_0 (cos (/ K 2.0))))
   (if (<= t_0 -0.08)
     (+ U (* J (* l (- (* l (- (* -4.333333333333333 l) 4.0)) 2.0))))
     (if (<= t_0 0.9995)
       (+ U (* J (- (exp l) (exp (- l)))))
       (fma (* (+ 1.0 (* -0.125 (pow K 2.0))) (* (sinh l) 2.0)) J U)))))

C

double code(double J, double l, double K, double U) {
	double t_0 = cos((K / 2.0));
	double tmp;
	if (t_0 <= -0.08) {
		tmp = U + (J * (l * ((l * ((-4.333333333333333 * l) - 4.0)) - 2.0)));
	} else if (t_0 <= 0.9995) {
		tmp = U + (J * (exp(l) - exp(-l)));
	} else {
		tmp = fma(((1.0 + (-0.125 * pow(K, 2.0))) * (sinh(l) * 2.0)), J, U);
	}
	return tmp;
}

Julia

function code(J, l, K, U)
	t_0 = cos(Float64(K / 2.0))
	tmp = 0.0
	if (t_0 <= -0.08)
		tmp = Float64(U + Float64(J * Float64(l * Float64(Float64(l * Float64(Float64(-4.333333333333333 * l) - 4.0)) - 2.0))));
	elseif (t_0 <= 0.9995)
		tmp = Float64(U + Float64(J * Float64(exp(l) - exp(Float64(-l)))));
	else
		tmp = fma(Float64(Float64(1.0 + Float64(-0.125 * (K ^ 2.0))) * Float64(sinh(l) * 2.0)), J, U);
	end
	return tmp
end

Wolfram

code[J_, l_, K_, U_] := Block[{t$95$0 = N[Cos[N[(K / 2.0), $MachinePrecision]], $MachinePrecision]}, If[LessEqual[t$95$0, -0.08], N[(U + N[(J * N[(l * N[(N[(l * N[(N[(-4.333333333333333 * l), $MachinePrecision] - 4.0), $MachinePrecision]), $MachinePrecision] - 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], If[LessEqual[t$95$0, 0.9995], N[(U + N[(J * N[(N[Exp[l], $MachinePrecision] - N[Exp[(-l)], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[(N[(1.0 + N[(-0.125 * N[Power[K, 2.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * N[(N[Sinh[l], $MachinePrecision] * 2.0), $MachinePrecision]), $MachinePrecision] * J + U), $MachinePrecision]]]]

Derivation

1. Split input into 3 regimes

2. if (cos.f64 (/.f64 K #s(literal 2 binary64))) < -0.0800000000000000017

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      2. *-commutative N/A

         \[\leadsto \color{blue}{\left(\left(e^{\ell} - e^{-\ell}\right) \cdot J\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      3. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(e^{\ell} - e^{-\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      4. sub-to-mult N/A

         \[\leadsto \left(\color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot e^{\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      5. associate-*l* N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      6. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   3. Applied rewrites 75.8%

      \[\leadsto \color{blue}{\left(\left(-\mathsf{expm1}\left(\left(-\ell\right) - \ell\right)\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   4. Taylor expanded in K around 0

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]
   5. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto U + \color{blue}{J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      2. lower-*.f64 N/A

         \[\leadsto U + J \cdot \color{blue}{\left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      3. lower-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \color{blue}{\left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)}\right) \]

      4. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\color{blue}{1} - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      5. lower--.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - \color{blue}{e^{\mathsf{neg}\left(2 \cdot \ell\right)}}\right)\right) \]

      6. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      7. lower-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

      8. lower-*.f64 54.9

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

   6. Applied rewrites 54.9%

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right)} \]
   7. Step-by-step derivation

      1. lift-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      2. lift-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      3. count-2-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(\left(\ell + \ell\right)\right)}\right)\right) \]

      4. distribute-neg-out N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\left(\mathsf{neg}\left(\ell\right)\right) + \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      5. flip-+ N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      6. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      7. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \ell \cdot \ell}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      8. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      9. add-flip N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) + \ell}}\right)\right) \]

      10. +-commutative N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\ell + \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      11. flip-- N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell - \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      12. add-flip-rev N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

      13. lower-+.f64 43.1

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   8. Applied rewrites 43.1%

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   9. Taylor expanded in l around 0

      \[\leadsto U + J \cdot \left(\ell \cdot \color{blue}{\left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)}\right) \]
   10. Step-by-step derivation

       1. lower-*.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - \color{blue}{2}\right)\right) \]

       2. lower--.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)\right) \]

       3. lower-*.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)\right) \]

       4. lower--.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)\right) \]

       5. lower-*.f64 45.8

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(-4.333333333333333 \cdot \ell - 4\right) - 2\right)\right) \]

   11. Applied rewrites 45.8%

       \[\leadsto U + J \cdot \left(\ell \cdot \color{blue}{\left(\ell \cdot \left(-4.333333333333333 \cdot \ell - 4\right) - 2\right)}\right) \]

   if -0.0800000000000000017 < (cos.f64 (/.f64 K #s(literal 2 binary64))) < 0.99950000000000006

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

   2. Taylor expanded in K around 0

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} - e^{\mathsf{neg}\left(\ell\right)}\right)} \]
   3. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto U + \color{blue}{J \cdot \left(e^{\ell} - e^{\mathsf{neg}\left(\ell\right)}\right)} \]

      2. lower-*.f64 N/A

         \[\leadsto U + J \cdot \color{blue}{\left(e^{\ell} - e^{\mathsf{neg}\left(\ell\right)}\right)} \]

      3. lower--.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} - \color{blue}{e^{\mathsf{neg}\left(\ell\right)}}\right) \]

      4. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} - e^{\color{blue}{\mathsf{neg}\left(\ell\right)}}\right) \]

      5. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} - e^{\mathsf{neg}\left(\ell\right)}\right) \]

      6. lower-neg.f64 73.4

         \[\leadsto U + J \cdot \left(e^{\ell} - e^{-\ell}\right) \]

   4. Applied rewrites 73.4%

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} - e^{-\ell}\right)} \]

   if 0.99950000000000006 < (cos.f64 (/.f64 K #s(literal 2 binary64)))

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
   2. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U} \]

      2. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right)} + U \]

      3. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      4. associate-*l* N/A

         \[\leadsto \color{blue}{J \cdot \left(\left(e^{\ell} - e^{-\ell}\right) \cdot \cos \left(\frac{K}{2}\right)\right)} + U \]

      5. *-commutative N/A

         \[\leadsto \color{blue}{\left(\left(e^{\ell} - e^{-\ell}\right) \cdot \cos \left(\frac{K}{2}\right)\right) \cdot J} + U \]

      6. lower-fma.f64 N/A

         \[\leadsto \color{blue}{\mathsf{fma}\left(\left(e^{\ell} - e^{-\ell}\right) \cdot \cos \left(\frac{K}{2}\right), J, U\right)} \]

   3. Applied rewrites 99.9%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\cos \left(K \cdot -0.5\right) \cdot \left(\sinh \ell \cdot 2\right), J, U\right)} \]

   4. Taylor expanded in K around 0

      \[\leadsto \mathsf{fma}\left(\color{blue}{\left(1 + \frac{-1}{8} \cdot {K}^{2}\right)} \cdot \left(\sinh \ell \cdot 2\right), J, U\right) \]
   5. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto \mathsf{fma}\left(\left(1 + \color{blue}{\frac{-1}{8} \cdot {K}^{2}}\right) \cdot \left(\sinh \ell \cdot 2\right), J, U\right) \]

      2. lower-*.f64 N/A

         \[\leadsto \mathsf{fma}\left(\left(1 + \frac{-1}{8} \cdot \color{blue}{{K}^{2}}\right) \cdot \left(\sinh \ell \cdot 2\right), J, U\right) \]

      3. lower-pow.f64 68.5

         \[\leadsto \mathsf{fma}\left(\left(1 + -0.125 \cdot {K}^{\color{blue}{2}}\right) \cdot \left(\sinh \ell \cdot 2\right), J, U\right) \]

   6. Applied rewrites 68.5%

      \[\leadsto \mathsf{fma}\left(\color{blue}{\left(1 + -0.125 \cdot {K}^{2}\right)} \cdot \left(\sinh \ell \cdot 2\right), J, U\right) \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 4: 82.5% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;\cos \left(\frac{K}{2}\right) \leq -0.08:\\ \;\;\;\;U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(-4.333333333333333 \cdot \ell - 4\right) - 2\right)\right)\\ \mathbf{else}:\\ \;\;\;\;U + J \cdot \left(e^{\ell} - e^{-\ell}\right)\\ \end{array} \end{array} \]

FPCore

(FPCore (J l K U)
 :precision binary64
 (if (<= (cos (/ K 2.0)) -0.08)
   (+ U (* J (* l (- (* l (- (* -4.333333333333333 l) 4.0)) 2.0))))
   (+ U (* J (- (exp l) (exp (- l)))))))

C

double code(double J, double l, double K, double U) {
	double tmp;
	if (cos((K / 2.0)) <= -0.08) {
		tmp = U + (J * (l * ((l * ((-4.333333333333333 * l) - 4.0)) - 2.0)));
	} else {
		tmp = U + (J * (exp(l) - exp(-l)));
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(j, l, k, u)
use fmin_fmax_functions
    real(8), intent (in) :: j
    real(8), intent (in) :: l
    real(8), intent (in) :: k
    real(8), intent (in) :: u
    real(8) :: tmp
    if (cos((k / 2.0d0)) <= (-0.08d0)) then
        tmp = u + (j * (l * ((l * (((-4.333333333333333d0) * l) - 4.0d0)) - 2.0d0)))
    else
        tmp = u + (j * (exp(l) - exp(-l)))
    end if
    code = tmp
end function

Java

public static double code(double J, double l, double K, double U) {
	double tmp;
	if (Math.cos((K / 2.0)) <= -0.08) {
		tmp = U + (J * (l * ((l * ((-4.333333333333333 * l) - 4.0)) - 2.0)));
	} else {
		tmp = U + (J * (Math.exp(l) - Math.exp(-l)));
	}
	return tmp;
}

Python

def code(J, l, K, U):
	tmp = 0
	if math.cos((K / 2.0)) <= -0.08:
		tmp = U + (J * (l * ((l * ((-4.333333333333333 * l) - 4.0)) - 2.0)))
	else:
		tmp = U + (J * (math.exp(l) - math.exp(-l)))
	return tmp

Julia

function code(J, l, K, U)
	tmp = 0.0
	if (cos(Float64(K / 2.0)) <= -0.08)
		tmp = Float64(U + Float64(J * Float64(l * Float64(Float64(l * Float64(Float64(-4.333333333333333 * l) - 4.0)) - 2.0))));
	else
		tmp = Float64(U + Float64(J * Float64(exp(l) - exp(Float64(-l)))));
	end
	return tmp
end

MATLAB

function tmp_2 = code(J, l, K, U)
	tmp = 0.0;
	if (cos((K / 2.0)) <= -0.08)
		tmp = U + (J * (l * ((l * ((-4.333333333333333 * l) - 4.0)) - 2.0)));
	else
		tmp = U + (J * (exp(l) - exp(-l)));
	end
	tmp_2 = tmp;
end

Wolfram

code[J_, l_, K_, U_] := If[LessEqual[N[Cos[N[(K / 2.0), $MachinePrecision]], $MachinePrecision], -0.08], N[(U + N[(J * N[(l * N[(N[(l * N[(N[(-4.333333333333333 * l), $MachinePrecision] - 4.0), $MachinePrecision]), $MachinePrecision] - 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(U + N[(J * N[(N[Exp[l], $MachinePrecision] - N[Exp[(-l)], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if (cos.f64 (/.f64 K #s(literal 2 binary64))) < -0.0800000000000000017

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      2. *-commutative N/A

         \[\leadsto \color{blue}{\left(\left(e^{\ell} - e^{-\ell}\right) \cdot J\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      3. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(e^{\ell} - e^{-\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      4. sub-to-mult N/A

         \[\leadsto \left(\color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot e^{\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      5. associate-*l* N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      6. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   3. Applied rewrites 75.8%

      \[\leadsto \color{blue}{\left(\left(-\mathsf{expm1}\left(\left(-\ell\right) - \ell\right)\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   4. Taylor expanded in K around 0

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]
   5. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto U + \color{blue}{J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      2. lower-*.f64 N/A

         \[\leadsto U + J \cdot \color{blue}{\left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      3. lower-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \color{blue}{\left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)}\right) \]

      4. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\color{blue}{1} - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      5. lower--.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - \color{blue}{e^{\mathsf{neg}\left(2 \cdot \ell\right)}}\right)\right) \]

      6. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      7. lower-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

      8. lower-*.f64 54.9

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

   6. Applied rewrites 54.9%

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right)} \]
   7. Step-by-step derivation

      1. lift-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      2. lift-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      3. count-2-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(\left(\ell + \ell\right)\right)}\right)\right) \]

      4. distribute-neg-out N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\left(\mathsf{neg}\left(\ell\right)\right) + \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      5. flip-+ N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      6. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      7. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \ell \cdot \ell}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      8. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      9. add-flip N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) + \ell}}\right)\right) \]

      10. +-commutative N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\ell + \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      11. flip-- N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell - \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      12. add-flip-rev N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

      13. lower-+.f64 43.1

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   8. Applied rewrites 43.1%

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   9. Taylor expanded in l around 0

      \[\leadsto U + J \cdot \left(\ell \cdot \color{blue}{\left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)}\right) \]
   10. Step-by-step derivation

       1. lower-*.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - \color{blue}{2}\right)\right) \]

       2. lower--.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)\right) \]

       3. lower-*.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)\right) \]

       4. lower--.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)\right) \]

       5. lower-*.f64 45.8

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(-4.333333333333333 \cdot \ell - 4\right) - 2\right)\right) \]

   11. Applied rewrites 45.8%

       \[\leadsto U + J \cdot \left(\ell \cdot \color{blue}{\left(\ell \cdot \left(-4.333333333333333 \cdot \ell - 4\right) - 2\right)}\right) \]

   if -0.0800000000000000017 < (cos.f64 (/.f64 K #s(literal 2 binary64)))

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

   2. Taylor expanded in K around 0

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} - e^{\mathsf{neg}\left(\ell\right)}\right)} \]
   3. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto U + \color{blue}{J \cdot \left(e^{\ell} - e^{\mathsf{neg}\left(\ell\right)}\right)} \]

      2. lower-*.f64 N/A

         \[\leadsto U + J \cdot \color{blue}{\left(e^{\ell} - e^{\mathsf{neg}\left(\ell\right)}\right)} \]

      3. lower--.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} - \color{blue}{e^{\mathsf{neg}\left(\ell\right)}}\right) \]

      4. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} - e^{\color{blue}{\mathsf{neg}\left(\ell\right)}}\right) \]

      5. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} - e^{\mathsf{neg}\left(\ell\right)}\right) \]

      6. lower-neg.f64 73.4

         \[\leadsto U + J \cdot \left(e^{\ell} - e^{-\ell}\right) \]

   4. Applied rewrites 73.4%

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} - e^{-\ell}\right)} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 5: 80.7% accurate, 2.3× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;\ell \leq -1.7:\\ \;\;\;\;U + J \cdot \left(1 \cdot \left(1 - e^{-2 \cdot \ell}\right)\right)\\ \mathbf{else}:\\ \;\;\;\;U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot 2\right)\right)\\ \end{array} \end{array} \]

FPCore

(FPCore (J l K U)
 :precision binary64
 (if (<= l -1.7)
   (+ U (* J (* 1.0 (- 1.0 (exp (- (* 2.0 l)))))))
   (+ U (* J (* (exp l) (* l 2.0))))))

C

double code(double J, double l, double K, double U) {
	double tmp;
	if (l <= -1.7) {
		tmp = U + (J * (1.0 * (1.0 - exp(-(2.0 * l)))));
	} else {
		tmp = U + (J * (exp(l) * (l * 2.0)));
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(j, l, k, u)
use fmin_fmax_functions
    real(8), intent (in) :: j
    real(8), intent (in) :: l
    real(8), intent (in) :: k
    real(8), intent (in) :: u
    real(8) :: tmp
    if (l <= (-1.7d0)) then
        tmp = u + (j * (1.0d0 * (1.0d0 - exp(-(2.0d0 * l)))))
    else
        tmp = u + (j * (exp(l) * (l * 2.0d0)))
    end if
    code = tmp
end function

Java

public static double code(double J, double l, double K, double U) {
	double tmp;
	if (l <= -1.7) {
		tmp = U + (J * (1.0 * (1.0 - Math.exp(-(2.0 * l)))));
	} else {
		tmp = U + (J * (Math.exp(l) * (l * 2.0)));
	}
	return tmp;
}

Python

def code(J, l, K, U):
	tmp = 0
	if l <= -1.7:
		tmp = U + (J * (1.0 * (1.0 - math.exp(-(2.0 * l)))))
	else:
		tmp = U + (J * (math.exp(l) * (l * 2.0)))
	return tmp

Julia

function code(J, l, K, U)
	tmp = 0.0
	if (l <= -1.7)
		tmp = Float64(U + Float64(J * Float64(1.0 * Float64(1.0 - exp(Float64(-Float64(2.0 * l)))))));
	else
		tmp = Float64(U + Float64(J * Float64(exp(l) * Float64(l * 2.0))));
	end
	return tmp
end

MATLAB

function tmp_2 = code(J, l, K, U)
	tmp = 0.0;
	if (l <= -1.7)
		tmp = U + (J * (1.0 * (1.0 - exp(-(2.0 * l)))));
	else
		tmp = U + (J * (exp(l) * (l * 2.0)));
	end
	tmp_2 = tmp;
end

Wolfram

code[J_, l_, K_, U_] := If[LessEqual[l, -1.7], N[(U + N[(J * N[(1.0 * N[(1.0 - N[Exp[(-N[(2.0 * l), $MachinePrecision])], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(U + N[(J * N[(N[Exp[l], $MachinePrecision] * N[(l * 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if l < -1.69999999999999996

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      2. *-commutative N/A

         \[\leadsto \color{blue}{\left(\left(e^{\ell} - e^{-\ell}\right) \cdot J\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      3. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(e^{\ell} - e^{-\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      4. sub-to-mult N/A

         \[\leadsto \left(\color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot e^{\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      5. associate-*l* N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      6. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   3. Applied rewrites 75.8%

      \[\leadsto \color{blue}{\left(\left(-\mathsf{expm1}\left(\left(-\ell\right) - \ell\right)\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   4. Taylor expanded in K around 0

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]
   5. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto U + \color{blue}{J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      2. lower-*.f64 N/A

         \[\leadsto U + J \cdot \color{blue}{\left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      3. lower-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \color{blue}{\left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)}\right) \]

      4. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\color{blue}{1} - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      5. lower--.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - \color{blue}{e^{\mathsf{neg}\left(2 \cdot \ell\right)}}\right)\right) \]

      6. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      7. lower-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

      8. lower-*.f64 54.9

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

   6. Applied rewrites 54.9%

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right)} \]

   7. Taylor expanded in l around 0

      \[\leadsto U + J \cdot \left(1 \cdot \left(\color{blue}{1} - e^{-2 \cdot \ell}\right)\right) \]
   8. Step-by-step derivation

   9. Applied rewrites 55.9%

      \[\leadsto U + J \cdot \left(1 \cdot \left(\color{blue}{1} - e^{-2 \cdot \ell}\right)\right) \]

   if -1.69999999999999996 < l

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      2. *-commutative N/A

         \[\leadsto \color{blue}{\left(\left(e^{\ell} - e^{-\ell}\right) \cdot J\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      3. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(e^{\ell} - e^{-\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      4. sub-to-mult N/A

         \[\leadsto \left(\color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot e^{\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      5. associate-*l* N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      6. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   3. Applied rewrites 75.8%

      \[\leadsto \color{blue}{\left(\left(-\mathsf{expm1}\left(\left(-\ell\right) - \ell\right)\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   4. Taylor expanded in K around 0

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]
   5. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto U + \color{blue}{J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      2. lower-*.f64 N/A

         \[\leadsto U + J \cdot \color{blue}{\left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      3. lower-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \color{blue}{\left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)}\right) \]

      4. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\color{blue}{1} - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      5. lower--.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - \color{blue}{e^{\mathsf{neg}\left(2 \cdot \ell\right)}}\right)\right) \]

      6. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      7. lower-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

      8. lower-*.f64 54.9

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

   6. Applied rewrites 54.9%

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right)} \]

   7. Taylor expanded in l around 0

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot \color{blue}{\left(2 + -2 \cdot \ell\right)}\right)\right) \]
   8. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot \left(2 + \color{blue}{-2 \cdot \ell}\right)\right)\right) \]

      2. lower-+.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot \left(2 + -2 \cdot \color{blue}{\ell}\right)\right)\right) \]

      3. lower-*.f64 50.8

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot \left(2 + -2 \cdot \ell\right)\right)\right) \]

   9. Applied rewrites 50.8%

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot \color{blue}{\left(2 + -2 \cdot \ell\right)}\right)\right) \]

   10. Taylor expanded in l around 0

       \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot 2\right)\right) \]
   11. Step-by-step derivation

   12. Applied rewrites 62.8%

       \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot 2\right)\right) \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 6: 71.9% accurate, 1.1× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;\cos \left(\frac{K}{2}\right) \leq -0.08:\\ \;\;\;\;U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(-4.333333333333333 \cdot \ell - 4\right) - 2\right)\right)\\ \mathbf{else}:\\ \;\;\;\;U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot 2\right)\right)\\ \end{array} \end{array} \]

FPCore

(FPCore (J l K U)
 :precision binary64
 (if (<= (cos (/ K 2.0)) -0.08)
   (+ U (* J (* l (- (* l (- (* -4.333333333333333 l) 4.0)) 2.0))))
   (+ U (* J (* (exp l) (* l 2.0))))))

C

double code(double J, double l, double K, double U) {
	double tmp;
	if (cos((K / 2.0)) <= -0.08) {
		tmp = U + (J * (l * ((l * ((-4.333333333333333 * l) - 4.0)) - 2.0)));
	} else {
		tmp = U + (J * (exp(l) * (l * 2.0)));
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(j, l, k, u)
use fmin_fmax_functions
    real(8), intent (in) :: j
    real(8), intent (in) :: l
    real(8), intent (in) :: k
    real(8), intent (in) :: u
    real(8) :: tmp
    if (cos((k / 2.0d0)) <= (-0.08d0)) then
        tmp = u + (j * (l * ((l * (((-4.333333333333333d0) * l) - 4.0d0)) - 2.0d0)))
    else
        tmp = u + (j * (exp(l) * (l * 2.0d0)))
    end if
    code = tmp
end function

Java

public static double code(double J, double l, double K, double U) {
	double tmp;
	if (Math.cos((K / 2.0)) <= -0.08) {
		tmp = U + (J * (l * ((l * ((-4.333333333333333 * l) - 4.0)) - 2.0)));
	} else {
		tmp = U + (J * (Math.exp(l) * (l * 2.0)));
	}
	return tmp;
}

Python

def code(J, l, K, U):
	tmp = 0
	if math.cos((K / 2.0)) <= -0.08:
		tmp = U + (J * (l * ((l * ((-4.333333333333333 * l) - 4.0)) - 2.0)))
	else:
		tmp = U + (J * (math.exp(l) * (l * 2.0)))
	return tmp

Julia

function code(J, l, K, U)
	tmp = 0.0
	if (cos(Float64(K / 2.0)) <= -0.08)
		tmp = Float64(U + Float64(J * Float64(l * Float64(Float64(l * Float64(Float64(-4.333333333333333 * l) - 4.0)) - 2.0))));
	else
		tmp = Float64(U + Float64(J * Float64(exp(l) * Float64(l * 2.0))));
	end
	return tmp
end

MATLAB

function tmp_2 = code(J, l, K, U)
	tmp = 0.0;
	if (cos((K / 2.0)) <= -0.08)
		tmp = U + (J * (l * ((l * ((-4.333333333333333 * l) - 4.0)) - 2.0)));
	else
		tmp = U + (J * (exp(l) * (l * 2.0)));
	end
	tmp_2 = tmp;
end

Wolfram

code[J_, l_, K_, U_] := If[LessEqual[N[Cos[N[(K / 2.0), $MachinePrecision]], $MachinePrecision], -0.08], N[(U + N[(J * N[(l * N[(N[(l * N[(N[(-4.333333333333333 * l), $MachinePrecision] - 4.0), $MachinePrecision]), $MachinePrecision] - 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(U + N[(J * N[(N[Exp[l], $MachinePrecision] * N[(l * 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if (cos.f64 (/.f64 K #s(literal 2 binary64))) < -0.0800000000000000017

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      2. *-commutative N/A

         \[\leadsto \color{blue}{\left(\left(e^{\ell} - e^{-\ell}\right) \cdot J\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      3. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(e^{\ell} - e^{-\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      4. sub-to-mult N/A

         \[\leadsto \left(\color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot e^{\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      5. associate-*l* N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      6. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   3. Applied rewrites 75.8%

      \[\leadsto \color{blue}{\left(\left(-\mathsf{expm1}\left(\left(-\ell\right) - \ell\right)\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   4. Taylor expanded in K around 0

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]
   5. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto U + \color{blue}{J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      2. lower-*.f64 N/A

         \[\leadsto U + J \cdot \color{blue}{\left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      3. lower-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \color{blue}{\left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)}\right) \]

      4. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\color{blue}{1} - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      5. lower--.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - \color{blue}{e^{\mathsf{neg}\left(2 \cdot \ell\right)}}\right)\right) \]

      6. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      7. lower-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

      8. lower-*.f64 54.9

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

   6. Applied rewrites 54.9%

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right)} \]
   7. Step-by-step derivation

      1. lift-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      2. lift-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      3. count-2-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(\left(\ell + \ell\right)\right)}\right)\right) \]

      4. distribute-neg-out N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\left(\mathsf{neg}\left(\ell\right)\right) + \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      5. flip-+ N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      6. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      7. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \ell \cdot \ell}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      8. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      9. add-flip N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) + \ell}}\right)\right) \]

      10. +-commutative N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\ell + \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      11. flip-- N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell - \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      12. add-flip-rev N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

      13. lower-+.f64 43.1

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   8. Applied rewrites 43.1%

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   9. Taylor expanded in l around 0

      \[\leadsto U + J \cdot \left(\ell \cdot \color{blue}{\left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)}\right) \]
   10. Step-by-step derivation

       1. lower-*.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - \color{blue}{2}\right)\right) \]

       2. lower--.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)\right) \]

       3. lower-*.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)\right) \]

       4. lower--.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)\right) \]

       5. lower-*.f64 45.8

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(-4.333333333333333 \cdot \ell - 4\right) - 2\right)\right) \]

   11. Applied rewrites 45.8%

       \[\leadsto U + J \cdot \left(\ell \cdot \color{blue}{\left(\ell \cdot \left(-4.333333333333333 \cdot \ell - 4\right) - 2\right)}\right) \]

   if -0.0800000000000000017 < (cos.f64 (/.f64 K #s(literal 2 binary64)))

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      2. *-commutative N/A

         \[\leadsto \color{blue}{\left(\left(e^{\ell} - e^{-\ell}\right) \cdot J\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      3. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(e^{\ell} - e^{-\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      4. sub-to-mult N/A

         \[\leadsto \left(\color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot e^{\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      5. associate-*l* N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      6. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   3. Applied rewrites 75.8%

      \[\leadsto \color{blue}{\left(\left(-\mathsf{expm1}\left(\left(-\ell\right) - \ell\right)\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   4. Taylor expanded in K around 0

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]
   5. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto U + \color{blue}{J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      2. lower-*.f64 N/A

         \[\leadsto U + J \cdot \color{blue}{\left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      3. lower-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \color{blue}{\left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)}\right) \]

      4. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\color{blue}{1} - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      5. lower--.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - \color{blue}{e^{\mathsf{neg}\left(2 \cdot \ell\right)}}\right)\right) \]

      6. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      7. lower-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

      8. lower-*.f64 54.9

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

   6. Applied rewrites 54.9%

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right)} \]

   7. Taylor expanded in l around 0

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot \color{blue}{\left(2 + -2 \cdot \ell\right)}\right)\right) \]
   8. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot \left(2 + \color{blue}{-2 \cdot \ell}\right)\right)\right) \]

      2. lower-+.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot \left(2 + -2 \cdot \color{blue}{\ell}\right)\right)\right) \]

      3. lower-*.f64 50.8

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot \left(2 + -2 \cdot \ell\right)\right)\right) \]

   9. Applied rewrites 50.8%

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot \color{blue}{\left(2 + -2 \cdot \ell\right)}\right)\right) \]

   10. Taylor expanded in l around 0

       \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot 2\right)\right) \]
   11. Step-by-step derivation

   12. Applied rewrites 62.8%

       \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\ell \cdot 2\right)\right) \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 7: 67.0% accurate, 1.1× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;\cos \left(\frac{K}{2}\right) \leq -0.08:\\ \;\;\;\;U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(-4.333333333333333 \cdot \ell - 4\right) - 2\right)\right)\\ \mathbf{else}:\\ \;\;\;\;\left(1 + \frac{\left(\ell \cdot J\right) \cdot 2}{U}\right) \cdot U\\ \end{array} \end{array} \]

FPCore

(FPCore (J l K U)
 :precision binary64
 (if (<= (cos (/ K 2.0)) -0.08)
   (+ U (* J (* l (- (* l (- (* -4.333333333333333 l) 4.0)) 2.0))))
   (* (+ 1.0 (/ (* (* l J) 2.0) U)) U)))

C

double code(double J, double l, double K, double U) {
	double tmp;
	if (cos((K / 2.0)) <= -0.08) {
		tmp = U + (J * (l * ((l * ((-4.333333333333333 * l) - 4.0)) - 2.0)));
	} else {
		tmp = (1.0 + (((l * J) * 2.0) / U)) * U;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(j, l, k, u)
use fmin_fmax_functions
    real(8), intent (in) :: j
    real(8), intent (in) :: l
    real(8), intent (in) :: k
    real(8), intent (in) :: u
    real(8) :: tmp
    if (cos((k / 2.0d0)) <= (-0.08d0)) then
        tmp = u + (j * (l * ((l * (((-4.333333333333333d0) * l) - 4.0d0)) - 2.0d0)))
    else
        tmp = (1.0d0 + (((l * j) * 2.0d0) / u)) * u
    end if
    code = tmp
end function

Java

public static double code(double J, double l, double K, double U) {
	double tmp;
	if (Math.cos((K / 2.0)) <= -0.08) {
		tmp = U + (J * (l * ((l * ((-4.333333333333333 * l) - 4.0)) - 2.0)));
	} else {
		tmp = (1.0 + (((l * J) * 2.0) / U)) * U;
	}
	return tmp;
}

Python

def code(J, l, K, U):
	tmp = 0
	if math.cos((K / 2.0)) <= -0.08:
		tmp = U + (J * (l * ((l * ((-4.333333333333333 * l) - 4.0)) - 2.0)))
	else:
		tmp = (1.0 + (((l * J) * 2.0) / U)) * U
	return tmp

Julia

function code(J, l, K, U)
	tmp = 0.0
	if (cos(Float64(K / 2.0)) <= -0.08)
		tmp = Float64(U + Float64(J * Float64(l * Float64(Float64(l * Float64(Float64(-4.333333333333333 * l) - 4.0)) - 2.0))));
	else
		tmp = Float64(Float64(1.0 + Float64(Float64(Float64(l * J) * 2.0) / U)) * U);
	end
	return tmp
end

MATLAB

function tmp_2 = code(J, l, K, U)
	tmp = 0.0;
	if (cos((K / 2.0)) <= -0.08)
		tmp = U + (J * (l * ((l * ((-4.333333333333333 * l) - 4.0)) - 2.0)));
	else
		tmp = (1.0 + (((l * J) * 2.0) / U)) * U;
	end
	tmp_2 = tmp;
end

Wolfram

code[J_, l_, K_, U_] := If[LessEqual[N[Cos[N[(K / 2.0), $MachinePrecision]], $MachinePrecision], -0.08], N[(U + N[(J * N[(l * N[(N[(l * N[(N[(-4.333333333333333 * l), $MachinePrecision] - 4.0), $MachinePrecision]), $MachinePrecision] - 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[(1.0 + N[(N[(N[(l * J), $MachinePrecision] * 2.0), $MachinePrecision] / U), $MachinePrecision]), $MachinePrecision] * U), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if (cos.f64 (/.f64 K #s(literal 2 binary64))) < -0.0800000000000000017

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      2. *-commutative N/A

         \[\leadsto \color{blue}{\left(\left(e^{\ell} - e^{-\ell}\right) \cdot J\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      3. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(e^{\ell} - e^{-\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      4. sub-to-mult N/A

         \[\leadsto \left(\color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot e^{\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      5. associate-*l* N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      6. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   3. Applied rewrites 75.8%

      \[\leadsto \color{blue}{\left(\left(-\mathsf{expm1}\left(\left(-\ell\right) - \ell\right)\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   4. Taylor expanded in K around 0

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]
   5. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto U + \color{blue}{J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      2. lower-*.f64 N/A

         \[\leadsto U + J \cdot \color{blue}{\left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      3. lower-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \color{blue}{\left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)}\right) \]

      4. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\color{blue}{1} - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      5. lower--.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - \color{blue}{e^{\mathsf{neg}\left(2 \cdot \ell\right)}}\right)\right) \]

      6. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      7. lower-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

      8. lower-*.f64 54.9

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

   6. Applied rewrites 54.9%

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right)} \]
   7. Step-by-step derivation

      1. lift-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      2. lift-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      3. count-2-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(\left(\ell + \ell\right)\right)}\right)\right) \]

      4. distribute-neg-out N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\left(\mathsf{neg}\left(\ell\right)\right) + \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      5. flip-+ N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      6. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      7. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \ell \cdot \ell}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      8. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      9. add-flip N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) + \ell}}\right)\right) \]

      10. +-commutative N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\ell + \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      11. flip-- N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell - \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      12. add-flip-rev N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

      13. lower-+.f64 43.1

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   8. Applied rewrites 43.1%

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   9. Taylor expanded in l around 0

      \[\leadsto U + J \cdot \left(\ell \cdot \color{blue}{\left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)}\right) \]
   10. Step-by-step derivation

       1. lower-*.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - \color{blue}{2}\right)\right) \]

       2. lower--.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)\right) \]

       3. lower-*.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)\right) \]

       4. lower--.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(\frac{-13}{3} \cdot \ell - 4\right) - 2\right)\right) \]

       5. lower-*.f64 45.8

          \[\leadsto U + J \cdot \left(\ell \cdot \left(\ell \cdot \left(-4.333333333333333 \cdot \ell - 4\right) - 2\right)\right) \]

   11. Applied rewrites 45.8%

       \[\leadsto U + J \cdot \left(\ell \cdot \color{blue}{\left(\ell \cdot \left(-4.333333333333333 \cdot \ell - 4\right) - 2\right)}\right) \]

   if -0.0800000000000000017 < (cos.f64 (/.f64 K #s(literal 2 binary64)))

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

   2. Taylor expanded in l around 0

      \[\leadsto \color{blue}{2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right)} + U \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto 2 \cdot \color{blue}{\left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right)} + U \]

      2. lower-*.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)}\right) + U \]

      3. lower-*.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \color{blue}{\cos \left(\frac{1}{2} \cdot K\right)}\right)\right) + U \]

      4. lower-cos.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right) + U \]

      5. lower-*.f64 64.4

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(0.5 \cdot K\right)\right)\right) + U \]

   4. Applied rewrites 64.4%

      \[\leadsto \color{blue}{2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(0.5 \cdot K\right)\right)\right)} + U \]

   5. Taylor expanded in K around 0

      \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\ell}\right) + U \]
   6. Step-by-step derivation

      1. lower-*.f64 54.6

         \[\leadsto 2 \cdot \left(J \cdot \ell\right) + U \]

   7. Applied rewrites 54.6%

      \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\ell}\right) + U \]
   8. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{2 \cdot \left(J \cdot \ell\right) + U} \]

      2. +-commutative N/A

         \[\leadsto \color{blue}{U + 2 \cdot \left(J \cdot \ell\right)} \]

      3. sum-to-mult N/A

         \[\leadsto \color{blue}{\left(1 + \frac{2 \cdot \left(J \cdot \ell\right)}{U}\right) \cdot U} \]

      4. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(1 + \frac{2 \cdot \left(J \cdot \ell\right)}{U}\right) \cdot U} \]

   9. Applied rewrites 58.0%

      \[\leadsto \color{blue}{\left(1 + \frac{\left(\ell \cdot J\right) \cdot 2}{U}\right) \cdot U} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 8: 62.6% accurate, 0.7× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \cos \left(\frac{K}{2}\right)\\ \mathbf{if}\;t\_0 \leq -0.3:\\ \;\;\;\;\left(J + J\right) \cdot \mathsf{fma}\left(\left(K \cdot K\right) \cdot \ell, -0.125, \ell\right) + U\\ \mathbf{elif}\;t\_0 \leq 0.05:\\ \;\;\;\;U + J \cdot \left(\ell \cdot \left(-4 \cdot \ell - 2\right)\right)\\ \mathbf{else}:\\ \;\;\;\;\left(1 + \frac{\left(\ell \cdot J\right) \cdot 2}{U}\right) \cdot U\\ \end{array} \end{array} \]

FPCore

(FPCore (J l K U)
 :precision binary64
 (let* ((t_0 (cos (/ K 2.0))))
   (if (<= t_0 -0.3)
     (+ (* (+ J J) (fma (* (* K K) l) -0.125 l)) U)
     (if (<= t_0 0.05)
       (+ U (* J (* l (- (* -4.0 l) 2.0))))
       (* (+ 1.0 (/ (* (* l J) 2.0) U)) U)))))

C

double code(double J, double l, double K, double U) {
	double t_0 = cos((K / 2.0));
	double tmp;
	if (t_0 <= -0.3) {
		tmp = ((J + J) * fma(((K * K) * l), -0.125, l)) + U;
	} else if (t_0 <= 0.05) {
		tmp = U + (J * (l * ((-4.0 * l) - 2.0)));
	} else {
		tmp = (1.0 + (((l * J) * 2.0) / U)) * U;
	}
	return tmp;
}

Julia

function code(J, l, K, U)
	t_0 = cos(Float64(K / 2.0))
	tmp = 0.0
	if (t_0 <= -0.3)
		tmp = Float64(Float64(Float64(J + J) * fma(Float64(Float64(K * K) * l), -0.125, l)) + U);
	elseif (t_0 <= 0.05)
		tmp = Float64(U + Float64(J * Float64(l * Float64(Float64(-4.0 * l) - 2.0))));
	else
		tmp = Float64(Float64(1.0 + Float64(Float64(Float64(l * J) * 2.0) / U)) * U);
	end
	return tmp
end

Wolfram

code[J_, l_, K_, U_] := Block[{t$95$0 = N[Cos[N[(K / 2.0), $MachinePrecision]], $MachinePrecision]}, If[LessEqual[t$95$0, -0.3], N[(N[(N[(J + J), $MachinePrecision] * N[(N[(N[(K * K), $MachinePrecision] * l), $MachinePrecision] * -0.125 + l), $MachinePrecision]), $MachinePrecision] + U), $MachinePrecision], If[LessEqual[t$95$0, 0.05], N[(U + N[(J * N[(l * N[(N[(-4.0 * l), $MachinePrecision] - 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[(1.0 + N[(N[(N[(l * J), $MachinePrecision] * 2.0), $MachinePrecision] / U), $MachinePrecision]), $MachinePrecision] * U), $MachinePrecision]]]]

Derivation

1. Split input into 3 regimes

2. if (cos.f64 (/.f64 K #s(literal 2 binary64))) < -0.299999999999999989

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

   2. Taylor expanded in l around 0

      \[\leadsto \color{blue}{2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right)} + U \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto 2 \cdot \color{blue}{\left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right)} + U \]

      2. lower-*.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)}\right) + U \]

      3. lower-*.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \color{blue}{\cos \left(\frac{1}{2} \cdot K\right)}\right)\right) + U \]

      4. lower-cos.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right) + U \]

      5. lower-*.f64 64.4

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(0.5 \cdot K\right)\right)\right) + U \]

   4. Applied rewrites 64.4%

      \[\leadsto \color{blue}{2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(0.5 \cdot K\right)\right)\right)} + U \]

   5. Taylor expanded in K around 0

      \[\leadsto 2 \cdot \left(J \cdot \left(\ell + \color{blue}{\frac{-1}{8} \cdot \left({K}^{2} \cdot \ell\right)}\right)\right) + U \]
   6. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell + \frac{-1}{8} \cdot \color{blue}{\left({K}^{2} \cdot \ell\right)}\right)\right) + U \]

      2. lower-*.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell + \frac{-1}{8} \cdot \left({K}^{2} \cdot \color{blue}{\ell}\right)\right)\right) + U \]

      3. lower-*.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell + \frac{-1}{8} \cdot \left({K}^{2} \cdot \ell\right)\right)\right) + U \]

      4. lower-pow.f64 48.9

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell + -0.125 \cdot \left({K}^{2} \cdot \ell\right)\right)\right) + U \]

   7. Applied rewrites 48.9%

      \[\leadsto 2 \cdot \left(J \cdot \left(\ell + \color{blue}{-0.125 \cdot \left({K}^{2} \cdot \ell\right)}\right)\right) + U \]
   8. Step-by-step derivation

   9. Applied rewrites 48.9%

      \[\leadsto \color{blue}{\left(J + J\right) \cdot \mathsf{fma}\left(\left(K \cdot K\right) \cdot \ell, -0.125, \ell\right) + U} \]

   if -0.299999999999999989 < (cos.f64 (/.f64 K #s(literal 2 binary64))) < 0.050000000000000003

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      2. *-commutative N/A

         \[\leadsto \color{blue}{\left(\left(e^{\ell} - e^{-\ell}\right) \cdot J\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      3. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(e^{\ell} - e^{-\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      4. sub-to-mult N/A

         \[\leadsto \left(\color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot e^{\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      5. associate-*l* N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      6. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   3. Applied rewrites 75.8%

      \[\leadsto \color{blue}{\left(\left(-\mathsf{expm1}\left(\left(-\ell\right) - \ell\right)\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   4. Taylor expanded in K around 0

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]
   5. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto U + \color{blue}{J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      2. lower-*.f64 N/A

         \[\leadsto U + J \cdot \color{blue}{\left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      3. lower-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \color{blue}{\left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)}\right) \]

      4. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\color{blue}{1} - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      5. lower--.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - \color{blue}{e^{\mathsf{neg}\left(2 \cdot \ell\right)}}\right)\right) \]

      6. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      7. lower-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

      8. lower-*.f64 54.9

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

   6. Applied rewrites 54.9%

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right)} \]
   7. Step-by-step derivation

      1. lift-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      2. lift-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      3. count-2-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(\left(\ell + \ell\right)\right)}\right)\right) \]

      4. distribute-neg-out N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\left(\mathsf{neg}\left(\ell\right)\right) + \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      5. flip-+ N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      6. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      7. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \ell \cdot \ell}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      8. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      9. add-flip N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) + \ell}}\right)\right) \]

      10. +-commutative N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\ell + \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      11. flip-- N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell - \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      12. add-flip-rev N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

      13. lower-+.f64 43.1

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   8. Applied rewrites 43.1%

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   9. Taylor expanded in l around 0

      \[\leadsto U + J \cdot \left(\ell \cdot \color{blue}{\left(-4 \cdot \ell - 2\right)}\right) \]
   10. Step-by-step derivation

       1. lower-*.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(-4 \cdot \ell - \color{blue}{2}\right)\right) \]

       2. lower--.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(-4 \cdot \ell - 2\right)\right) \]

       3. lower-*.f64 52.6

          \[\leadsto U + J \cdot \left(\ell \cdot \left(-4 \cdot \ell - 2\right)\right) \]

   11. Applied rewrites 52.6%

       \[\leadsto U + J \cdot \left(\ell \cdot \color{blue}{\left(-4 \cdot \ell - 2\right)}\right) \]

   if 0.050000000000000003 < (cos.f64 (/.f64 K #s(literal 2 binary64)))

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

   2. Taylor expanded in l around 0

      \[\leadsto \color{blue}{2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right)} + U \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto 2 \cdot \color{blue}{\left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right)} + U \]

      2. lower-*.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)}\right) + U \]

      3. lower-*.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \color{blue}{\cos \left(\frac{1}{2} \cdot K\right)}\right)\right) + U \]

      4. lower-cos.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right) + U \]

      5. lower-*.f64 64.4

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(0.5 \cdot K\right)\right)\right) + U \]

   4. Applied rewrites 64.4%

      \[\leadsto \color{blue}{2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(0.5 \cdot K\right)\right)\right)} + U \]

   5. Taylor expanded in K around 0

      \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\ell}\right) + U \]
   6. Step-by-step derivation

      1. lower-*.f64 54.6

         \[\leadsto 2 \cdot \left(J \cdot \ell\right) + U \]

   7. Applied rewrites 54.6%

      \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\ell}\right) + U \]
   8. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{2 \cdot \left(J \cdot \ell\right) + U} \]

      2. +-commutative N/A

         \[\leadsto \color{blue}{U + 2 \cdot \left(J \cdot \ell\right)} \]

      3. sum-to-mult N/A

         \[\leadsto \color{blue}{\left(1 + \frac{2 \cdot \left(J \cdot \ell\right)}{U}\right) \cdot U} \]

      4. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(1 + \frac{2 \cdot \left(J \cdot \ell\right)}{U}\right) \cdot U} \]

   9. Applied rewrites 58.0%

      \[\leadsto \color{blue}{\left(1 + \frac{\left(\ell \cdot J\right) \cdot 2}{U}\right) \cdot U} \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 9: 62.1% accurate, 1.2× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;\cos \left(\frac{K}{2}\right) \leq 0.05:\\ \;\;\;\;U + J \cdot \left(\ell \cdot \left(-4 \cdot \ell - 2\right)\right)\\ \mathbf{else}:\\ \;\;\;\;\left(1 + \frac{\left(\ell \cdot J\right) \cdot 2}{U}\right) \cdot U\\ \end{array} \end{array} \]

FPCore

(FPCore (J l K U)
 :precision binary64
 (if (<= (cos (/ K 2.0)) 0.05)
   (+ U (* J (* l (- (* -4.0 l) 2.0))))
   (* (+ 1.0 (/ (* (* l J) 2.0) U)) U)))

C

double code(double J, double l, double K, double U) {
	double tmp;
	if (cos((K / 2.0)) <= 0.05) {
		tmp = U + (J * (l * ((-4.0 * l) - 2.0)));
	} else {
		tmp = (1.0 + (((l * J) * 2.0) / U)) * U;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(j, l, k, u)
use fmin_fmax_functions
    real(8), intent (in) :: j
    real(8), intent (in) :: l
    real(8), intent (in) :: k
    real(8), intent (in) :: u
    real(8) :: tmp
    if (cos((k / 2.0d0)) <= 0.05d0) then
        tmp = u + (j * (l * (((-4.0d0) * l) - 2.0d0)))
    else
        tmp = (1.0d0 + (((l * j) * 2.0d0) / u)) * u
    end if
    code = tmp
end function

Java

public static double code(double J, double l, double K, double U) {
	double tmp;
	if (Math.cos((K / 2.0)) <= 0.05) {
		tmp = U + (J * (l * ((-4.0 * l) - 2.0)));
	} else {
		tmp = (1.0 + (((l * J) * 2.0) / U)) * U;
	}
	return tmp;
}

Python

def code(J, l, K, U):
	tmp = 0
	if math.cos((K / 2.0)) <= 0.05:
		tmp = U + (J * (l * ((-4.0 * l) - 2.0)))
	else:
		tmp = (1.0 + (((l * J) * 2.0) / U)) * U
	return tmp

Julia

function code(J, l, K, U)
	tmp = 0.0
	if (cos(Float64(K / 2.0)) <= 0.05)
		tmp = Float64(U + Float64(J * Float64(l * Float64(Float64(-4.0 * l) - 2.0))));
	else
		tmp = Float64(Float64(1.0 + Float64(Float64(Float64(l * J) * 2.0) / U)) * U);
	end
	return tmp
end

MATLAB

function tmp_2 = code(J, l, K, U)
	tmp = 0.0;
	if (cos((K / 2.0)) <= 0.05)
		tmp = U + (J * (l * ((-4.0 * l) - 2.0)));
	else
		tmp = (1.0 + (((l * J) * 2.0) / U)) * U;
	end
	tmp_2 = tmp;
end

Wolfram

code[J_, l_, K_, U_] := If[LessEqual[N[Cos[N[(K / 2.0), $MachinePrecision]], $MachinePrecision], 0.05], N[(U + N[(J * N[(l * N[(N[(-4.0 * l), $MachinePrecision] - 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[(1.0 + N[(N[(N[(l * J), $MachinePrecision] * 2.0), $MachinePrecision] / U), $MachinePrecision]), $MachinePrecision] * U), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if (cos.f64 (/.f64 K #s(literal 2 binary64))) < 0.050000000000000003

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      2. *-commutative N/A

         \[\leadsto \color{blue}{\left(\left(e^{\ell} - e^{-\ell}\right) \cdot J\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      3. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(e^{\ell} - e^{-\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      4. sub-to-mult N/A

         \[\leadsto \left(\color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot e^{\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      5. associate-*l* N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      6. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   3. Applied rewrites 75.8%

      \[\leadsto \color{blue}{\left(\left(-\mathsf{expm1}\left(\left(-\ell\right) - \ell\right)\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   4. Taylor expanded in K around 0

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]
   5. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto U + \color{blue}{J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      2. lower-*.f64 N/A

         \[\leadsto U + J \cdot \color{blue}{\left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      3. lower-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \color{blue}{\left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)}\right) \]

      4. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\color{blue}{1} - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      5. lower--.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - \color{blue}{e^{\mathsf{neg}\left(2 \cdot \ell\right)}}\right)\right) \]

      6. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      7. lower-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

      8. lower-*.f64 54.9

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

   6. Applied rewrites 54.9%

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right)} \]
   7. Step-by-step derivation

      1. lift-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      2. lift-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      3. count-2-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(\left(\ell + \ell\right)\right)}\right)\right) \]

      4. distribute-neg-out N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\left(\mathsf{neg}\left(\ell\right)\right) + \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      5. flip-+ N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      6. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      7. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \ell \cdot \ell}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      8. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      9. add-flip N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) + \ell}}\right)\right) \]

      10. +-commutative N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\ell + \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      11. flip-- N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell - \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      12. add-flip-rev N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

      13. lower-+.f64 43.1

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   8. Applied rewrites 43.1%

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   9. Taylor expanded in l around 0

      \[\leadsto U + J \cdot \left(\ell \cdot \color{blue}{\left(-4 \cdot \ell - 2\right)}\right) \]
   10. Step-by-step derivation

       1. lower-*.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(-4 \cdot \ell - \color{blue}{2}\right)\right) \]

       2. lower--.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(-4 \cdot \ell - 2\right)\right) \]

       3. lower-*.f64 52.6

          \[\leadsto U + J \cdot \left(\ell \cdot \left(-4 \cdot \ell - 2\right)\right) \]

   11. Applied rewrites 52.6%

       \[\leadsto U + J \cdot \left(\ell \cdot \color{blue}{\left(-4 \cdot \ell - 2\right)}\right) \]

   if 0.050000000000000003 < (cos.f64 (/.f64 K #s(literal 2 binary64)))

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

   2. Taylor expanded in l around 0

      \[\leadsto \color{blue}{2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right)} + U \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto 2 \cdot \color{blue}{\left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right)} + U \]

      2. lower-*.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)}\right) + U \]

      3. lower-*.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \color{blue}{\cos \left(\frac{1}{2} \cdot K\right)}\right)\right) + U \]

      4. lower-cos.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right) + U \]

      5. lower-*.f64 64.4

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(0.5 \cdot K\right)\right)\right) + U \]

   4. Applied rewrites 64.4%

      \[\leadsto \color{blue}{2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(0.5 \cdot K\right)\right)\right)} + U \]

   5. Taylor expanded in K around 0

      \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\ell}\right) + U \]
   6. Step-by-step derivation

      1. lower-*.f64 54.6

         \[\leadsto 2 \cdot \left(J \cdot \ell\right) + U \]

   7. Applied rewrites 54.6%

      \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\ell}\right) + U \]
   8. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{2 \cdot \left(J \cdot \ell\right) + U} \]

      2. +-commutative N/A

         \[\leadsto \color{blue}{U + 2 \cdot \left(J \cdot \ell\right)} \]

      3. sum-to-mult N/A

         \[\leadsto \color{blue}{\left(1 + \frac{2 \cdot \left(J \cdot \ell\right)}{U}\right) \cdot U} \]

      4. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(1 + \frac{2 \cdot \left(J \cdot \ell\right)}{U}\right) \cdot U} \]

   9. Applied rewrites 58.0%

      \[\leadsto \color{blue}{\left(1 + \frac{\left(\ell \cdot J\right) \cdot 2}{U}\right) \cdot U} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 10: 59.2% accurate, 1.3× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;\cos \left(\frac{K}{2}\right) \leq 0.85:\\ \;\;\;\;U + J \cdot \left(\ell \cdot \left(-4 \cdot \ell - 2\right)\right)\\ \mathbf{else}:\\ \;\;\;\;2 \cdot \left(J \cdot \ell\right) + U\\ \end{array} \end{array} \]

FPCore

(FPCore (J l K U)
 :precision binary64
 (if (<= (cos (/ K 2.0)) 0.85)
   (+ U (* J (* l (- (* -4.0 l) 2.0))))
   (+ (* 2.0 (* J l)) U)))

C

double code(double J, double l, double K, double U) {
	double tmp;
	if (cos((K / 2.0)) <= 0.85) {
		tmp = U + (J * (l * ((-4.0 * l) - 2.0)));
	} else {
		tmp = (2.0 * (J * l)) + U;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(j, l, k, u)
use fmin_fmax_functions
    real(8), intent (in) :: j
    real(8), intent (in) :: l
    real(8), intent (in) :: k
    real(8), intent (in) :: u
    real(8) :: tmp
    if (cos((k / 2.0d0)) <= 0.85d0) then
        tmp = u + (j * (l * (((-4.0d0) * l) - 2.0d0)))
    else
        tmp = (2.0d0 * (j * l)) + u
    end if
    code = tmp
end function

Java

public static double code(double J, double l, double K, double U) {
	double tmp;
	if (Math.cos((K / 2.0)) <= 0.85) {
		tmp = U + (J * (l * ((-4.0 * l) - 2.0)));
	} else {
		tmp = (2.0 * (J * l)) + U;
	}
	return tmp;
}

Python

def code(J, l, K, U):
	tmp = 0
	if math.cos((K / 2.0)) <= 0.85:
		tmp = U + (J * (l * ((-4.0 * l) - 2.0)))
	else:
		tmp = (2.0 * (J * l)) + U
	return tmp

Julia

function code(J, l, K, U)
	tmp = 0.0
	if (cos(Float64(K / 2.0)) <= 0.85)
		tmp = Float64(U + Float64(J * Float64(l * Float64(Float64(-4.0 * l) - 2.0))));
	else
		tmp = Float64(Float64(2.0 * Float64(J * l)) + U);
	end
	return tmp
end

MATLAB

function tmp_2 = code(J, l, K, U)
	tmp = 0.0;
	if (cos((K / 2.0)) <= 0.85)
		tmp = U + (J * (l * ((-4.0 * l) - 2.0)));
	else
		tmp = (2.0 * (J * l)) + U;
	end
	tmp_2 = tmp;
end

Wolfram

code[J_, l_, K_, U_] := If[LessEqual[N[Cos[N[(K / 2.0), $MachinePrecision]], $MachinePrecision], 0.85], N[(U + N[(J * N[(l * N[(N[(-4.0 * l), $MachinePrecision] - 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[(2.0 * N[(J * l), $MachinePrecision]), $MachinePrecision] + U), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if (cos.f64 (/.f64 K #s(literal 2 binary64))) < 0.849999999999999978

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      2. *-commutative N/A

         \[\leadsto \color{blue}{\left(\left(e^{\ell} - e^{-\ell}\right) \cdot J\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      3. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(e^{\ell} - e^{-\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      4. sub-to-mult N/A

         \[\leadsto \left(\color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot e^{\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      5. associate-*l* N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      6. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   3. Applied rewrites 75.8%

      \[\leadsto \color{blue}{\left(\left(-\mathsf{expm1}\left(\left(-\ell\right) - \ell\right)\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   4. Taylor expanded in K around 0

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]
   5. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto U + \color{blue}{J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      2. lower-*.f64 N/A

         \[\leadsto U + J \cdot \color{blue}{\left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      3. lower-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \color{blue}{\left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)}\right) \]

      4. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\color{blue}{1} - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      5. lower--.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - \color{blue}{e^{\mathsf{neg}\left(2 \cdot \ell\right)}}\right)\right) \]

      6. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      7. lower-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

      8. lower-*.f64 54.9

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

   6. Applied rewrites 54.9%

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right)} \]
   7. Step-by-step derivation

      1. lift-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      2. lift-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      3. count-2-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(\left(\ell + \ell\right)\right)}\right)\right) \]

      4. distribute-neg-out N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\left(\mathsf{neg}\left(\ell\right)\right) + \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      5. flip-+ N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      6. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      7. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \ell \cdot \ell}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      8. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      9. add-flip N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) + \ell}}\right)\right) \]

      10. +-commutative N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\ell + \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      11. flip-- N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell - \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      12. add-flip-rev N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

      13. lower-+.f64 43.1

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   8. Applied rewrites 43.1%

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   9. Taylor expanded in l around 0

      \[\leadsto U + J \cdot \left(\ell \cdot \color{blue}{\left(-4 \cdot \ell - 2\right)}\right) \]
   10. Step-by-step derivation

       1. lower-*.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(-4 \cdot \ell - \color{blue}{2}\right)\right) \]

       2. lower--.f64 N/A

          \[\leadsto U + J \cdot \left(\ell \cdot \left(-4 \cdot \ell - 2\right)\right) \]

       3. lower-*.f64 52.6

          \[\leadsto U + J \cdot \left(\ell \cdot \left(-4 \cdot \ell - 2\right)\right) \]

   11. Applied rewrites 52.6%

       \[\leadsto U + J \cdot \left(\ell \cdot \color{blue}{\left(-4 \cdot \ell - 2\right)}\right) \]

   if 0.849999999999999978 < (cos.f64 (/.f64 K #s(literal 2 binary64)))

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

   2. Taylor expanded in l around 0

      \[\leadsto \color{blue}{2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right)} + U \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto 2 \cdot \color{blue}{\left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right)} + U \]

      2. lower-*.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)}\right) + U \]

      3. lower-*.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \color{blue}{\cos \left(\frac{1}{2} \cdot K\right)}\right)\right) + U \]

      4. lower-cos.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right) + U \]

      5. lower-*.f64 64.4

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(0.5 \cdot K\right)\right)\right) + U \]

   4. Applied rewrites 64.4%

      \[\leadsto \color{blue}{2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(0.5 \cdot K\right)\right)\right)} + U \]

   5. Taylor expanded in K around 0

      \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\ell}\right) + U \]
   6. Step-by-step derivation

      1. lower-*.f64 54.6

         \[\leadsto 2 \cdot \left(J \cdot \ell\right) + U \]

   7. Applied rewrites 54.6%

      \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\ell}\right) + U \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 11: 58.3% accurate, 1.4× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;\cos \left(\frac{K}{2}\right) \leq -0.072:\\ \;\;\;\;U + -2 \cdot \left(J \cdot \ell\right)\\ \mathbf{else}:\\ \;\;\;\;2 \cdot \left(J \cdot \ell\right) + U\\ \end{array} \end{array} \]

FPCore

(FPCore (J l K U)
 :precision binary64
 (if (<= (cos (/ K 2.0)) -0.072) (+ U (* -2.0 (* J l))) (+ (* 2.0 (* J l)) U)))

C

double code(double J, double l, double K, double U) {
	double tmp;
	if (cos((K / 2.0)) <= -0.072) {
		tmp = U + (-2.0 * (J * l));
	} else {
		tmp = (2.0 * (J * l)) + U;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(j, l, k, u)
use fmin_fmax_functions
    real(8), intent (in) :: j
    real(8), intent (in) :: l
    real(8), intent (in) :: k
    real(8), intent (in) :: u
    real(8) :: tmp
    if (cos((k / 2.0d0)) <= (-0.072d0)) then
        tmp = u + ((-2.0d0) * (j * l))
    else
        tmp = (2.0d0 * (j * l)) + u
    end if
    code = tmp
end function

Java

public static double code(double J, double l, double K, double U) {
	double tmp;
	if (Math.cos((K / 2.0)) <= -0.072) {
		tmp = U + (-2.0 * (J * l));
	} else {
		tmp = (2.0 * (J * l)) + U;
	}
	return tmp;
}

Python

def code(J, l, K, U):
	tmp = 0
	if math.cos((K / 2.0)) <= -0.072:
		tmp = U + (-2.0 * (J * l))
	else:
		tmp = (2.0 * (J * l)) + U
	return tmp

Julia

function code(J, l, K, U)
	tmp = 0.0
	if (cos(Float64(K / 2.0)) <= -0.072)
		tmp = Float64(U + Float64(-2.0 * Float64(J * l)));
	else
		tmp = Float64(Float64(2.0 * Float64(J * l)) + U);
	end
	return tmp
end

MATLAB

function tmp_2 = code(J, l, K, U)
	tmp = 0.0;
	if (cos((K / 2.0)) <= -0.072)
		tmp = U + (-2.0 * (J * l));
	else
		tmp = (2.0 * (J * l)) + U;
	end
	tmp_2 = tmp;
end

Wolfram

code[J_, l_, K_, U_] := If[LessEqual[N[Cos[N[(K / 2.0), $MachinePrecision]], $MachinePrecision], -0.072], N[(U + N[(-2.0 * N[(J * l), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[(2.0 * N[(J * l), $MachinePrecision]), $MachinePrecision] + U), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if (cos.f64 (/.f64 K #s(literal 2 binary64))) < -0.0719999999999999946

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      2. *-commutative N/A

         \[\leadsto \color{blue}{\left(\left(e^{\ell} - e^{-\ell}\right) \cdot J\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      3. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(e^{\ell} - e^{-\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      4. sub-to-mult N/A

         \[\leadsto \left(\color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot e^{\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

      5. associate-*l* N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

      6. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   3. Applied rewrites 75.8%

      \[\leadsto \color{blue}{\left(\left(-\mathsf{expm1}\left(\left(-\ell\right) - \ell\right)\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   4. Taylor expanded in K around 0

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]
   5. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto U + \color{blue}{J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      2. lower-*.f64 N/A

         \[\leadsto U + J \cdot \color{blue}{\left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

      3. lower-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \color{blue}{\left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)}\right) \]

      4. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\color{blue}{1} - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      5. lower--.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - \color{blue}{e^{\mathsf{neg}\left(2 \cdot \ell\right)}}\right)\right) \]

      6. lower-exp.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      7. lower-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

      8. lower-*.f64 54.9

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

   6. Applied rewrites 54.9%

      \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right)} \]
   7. Step-by-step derivation

      1. lift-neg.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      2. lift-*.f64 N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

      3. count-2-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(\left(\ell + \ell\right)\right)}\right)\right) \]

      4. distribute-neg-out N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\left(\mathsf{neg}\left(\ell\right)\right) + \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      5. flip-+ N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      6. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      7. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \ell \cdot \ell}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      8. sqr-neg-rev N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      9. add-flip N/A

         \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) + \ell}}\right)\right) \]

      10. +-commutative N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\ell + \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

      11. flip-- N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell - \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

      12. add-flip-rev N/A

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

      13. lower-+.f64 43.1

          \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   8. Applied rewrites 43.1%

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   9. Taylor expanded in l around 0

      \[\leadsto U + -2 \cdot \color{blue}{\left(J \cdot \ell\right)} \]
   10. Step-by-step derivation

       1. lower-*.f64 N/A

          \[\leadsto U + -2 \cdot \left(J \cdot \color{blue}{\ell}\right) \]

       2. lower-*.f64 40.4

          \[\leadsto U + -2 \cdot \left(J \cdot \ell\right) \]

   11. Applied rewrites 40.4%

       \[\leadsto U + -2 \cdot \color{blue}{\left(J \cdot \ell\right)} \]

   if -0.0719999999999999946 < (cos.f64 (/.f64 K #s(literal 2 binary64)))

   1. Initial program 85.8%

      \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

   2. Taylor expanded in l around 0

      \[\leadsto \color{blue}{2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right)} + U \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto 2 \cdot \color{blue}{\left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right)} + U \]

      2. lower-*.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)}\right) + U \]

      3. lower-*.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \color{blue}{\cos \left(\frac{1}{2} \cdot K\right)}\right)\right) + U \]

      4. lower-cos.f64 N/A

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(\frac{1}{2} \cdot K\right)\right)\right) + U \]

      5. lower-*.f64 64.4

         \[\leadsto 2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(0.5 \cdot K\right)\right)\right) + U \]

   4. Applied rewrites 64.4%

      \[\leadsto \color{blue}{2 \cdot \left(J \cdot \left(\ell \cdot \cos \left(0.5 \cdot K\right)\right)\right)} + U \]

   5. Taylor expanded in K around 0

      \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\ell}\right) + U \]
   6. Step-by-step derivation

      1. lower-*.f64 54.6

         \[\leadsto 2 \cdot \left(J \cdot \ell\right) + U \]

   7. Applied rewrites 54.6%

      \[\leadsto 2 \cdot \left(J \cdot \color{blue}{\ell}\right) + U \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 12: 40.4% accurate, 7.1× speedup

Math

\[\begin{array}{l} \\ U + -2 \cdot \left(J \cdot \ell\right) \end{array} \]

FPCore

(FPCore (J l K U) :precision binary64 (+ U (* -2.0 (* J l))))

C

double code(double J, double l, double K, double U) {
	return U + (-2.0 * (J * l));
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(j, l, k, u)
use fmin_fmax_functions
    real(8), intent (in) :: j
    real(8), intent (in) :: l
    real(8), intent (in) :: k
    real(8), intent (in) :: u
    code = u + ((-2.0d0) * (j * l))
end function

Java

public static double code(double J, double l, double K, double U) {
	return U + (-2.0 * (J * l));
}

Python

def code(J, l, K, U):
	return U + (-2.0 * (J * l))

Julia

function code(J, l, K, U)
	return Float64(U + Float64(-2.0 * Float64(J * l)))
end

MATLAB

function tmp = code(J, l, K, U)
	tmp = U + (-2.0 * (J * l));
end

Wolfram

code[J_, l_, K_, U_] := N[(U + N[(-2.0 * N[(J * l), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 85.8%

   \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]
2. Step-by-step derivation

   1. lift-*.f64 N/A

      \[\leadsto \color{blue}{\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   2. *-commutative N/A

      \[\leadsto \color{blue}{\left(\left(e^{\ell} - e^{-\ell}\right) \cdot J\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   3. lift--.f64 N/A

      \[\leadsto \left(\color{blue}{\left(e^{\ell} - e^{-\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

   4. sub-to-mult N/A

      \[\leadsto \left(\color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot e^{\ell}\right)} \cdot J\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

   5. associate-*l* N/A

      \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

   6. lower-*.f64 N/A

      \[\leadsto \color{blue}{\left(\left(1 - \frac{e^{-\ell}}{e^{\ell}}\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

3. Applied rewrites 75.8%

   \[\leadsto \color{blue}{\left(\left(-\mathsf{expm1}\left(\left(-\ell\right) - \ell\right)\right) \cdot \left(e^{\ell} \cdot J\right)\right)} \cdot \cos \left(\frac{K}{2}\right) + U \]

4. Taylor expanded in K around 0

   \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]
5. Step-by-step derivation

   1. lower-+.f64 N/A

      \[\leadsto U + \color{blue}{J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

   2. lower-*.f64 N/A

      \[\leadsto U + J \cdot \color{blue}{\left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right)} \]

   3. lower-*.f64 N/A

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \color{blue}{\left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)}\right) \]

   4. lower-exp.f64 N/A

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(\color{blue}{1} - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

   5. lower--.f64 N/A

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - \color{blue}{e^{\mathsf{neg}\left(2 \cdot \ell\right)}}\right)\right) \]

   6. lower-exp.f64 N/A

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

   7. lower-neg.f64 N/A

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

   8. lower-*.f64 54.9

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right) \]

6. Applied rewrites 54.9%

   \[\leadsto \color{blue}{U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{-2 \cdot \ell}\right)\right)} \]
7. Step-by-step derivation

   1. lift-neg.f64 N/A

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

   2. lift-*.f64 N/A

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(2 \cdot \ell\right)}\right)\right) \]

   3. count-2-rev N/A

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\mathsf{neg}\left(\left(\ell + \ell\right)\right)}\right)\right) \]

   4. distribute-neg-out N/A

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\left(\mathsf{neg}\left(\ell\right)\right) + \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

   5. flip-+ N/A

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

   6. sqr-neg-rev N/A

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

   7. sqr-neg-rev N/A

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \ell \cdot \ell}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

   8. sqr-neg-rev N/A

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) - \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

   9. add-flip N/A

      \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\left(\mathsf{neg}\left(\ell\right)\right) + \ell}}\right)\right) \]

   10. +-commutative N/A

       \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\frac{\ell \cdot \ell - \left(\mathsf{neg}\left(\ell\right)\right) \cdot \left(\mathsf{neg}\left(\ell\right)\right)}{\ell + \left(\mathsf{neg}\left(\ell\right)\right)}}\right)\right) \]

   11. flip-- N/A

       \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell - \left(\mathsf{neg}\left(\ell\right)\right)}\right)\right) \]

   12. add-flip-rev N/A

       \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

   13. lower-+.f64 43.1

       \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

8. Applied rewrites 43.1%

   \[\leadsto U + J \cdot \left(e^{\ell} \cdot \left(1 - e^{\ell + \ell}\right)\right) \]

9. Taylor expanded in l around 0

   \[\leadsto U + -2 \cdot \color{blue}{\left(J \cdot \ell\right)} \]
10. Step-by-step derivation

    1. lower-*.f64 N/A

       \[\leadsto U + -2 \cdot \left(J \cdot \color{blue}{\ell}\right) \]

    2. lower-*.f64 40.4

       \[\leadsto U + -2 \cdot \left(J \cdot \ell\right) \]

11. Applied rewrites 40.4%

    \[\leadsto U + -2 \cdot \color{blue}{\left(J \cdot \ell\right)} \]
12. Add Preprocessing

Alternative 13: 37.4% accurate, 68.7× speedup

Math

\[\begin{array}{l} \\ U \end{array} \]

FPCore

(FPCore (J l K U) :precision binary64 U)

C

double code(double J, double l, double K, double U) {
	return U;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(j, l, k, u)
use fmin_fmax_functions
    real(8), intent (in) :: j
    real(8), intent (in) :: l
    real(8), intent (in) :: k
    real(8), intent (in) :: u
    code = u
end function

Java

public static double code(double J, double l, double K, double U) {
	return U;
}

Python

def code(J, l, K, U):
	return U

Julia

function code(J, l, K, U)
	return U
end

MATLAB

function tmp = code(J, l, K, U)
	tmp = U;
end

Wolfram

code[J_, l_, K_, U_] := U

Derivation

1. Initial program 85.8%

   \[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U \]

2. Taylor expanded in J around 0

   \[\leadsto \color{blue}{U} \]
3. Step-by-step derivation

4. Applied rewrites 37.4%

   \[\leadsto \color{blue}{U} \]
5. Add Preprocessing

Reproduce

herbie shell --seed 2025151 
(FPCore (J l K U)
  :name "Maksimov and Kolovsky, Equation (4)"
  :precision binary64
  (+ (* (* J (- (exp l) (exp (- l)))) (cos (/ K 2.0))) U))