math.exp on complex, real part

Percentage Accurate: 100.0% → 100.0%

Time: 6.5s

Alternatives: 9

Speedup: 1.0×

• 25.6% of points produce a very large (infinite) output. You may want to add a precondition.

Specification

Math

\[\begin{array}{l} \\ e^{re} \cdot \cos im \end{array} \]

FPCore

(FPCore (re im) :precision binary64 (* (exp re) (cos im)))

C

double code(double re, double im) {
	return exp(re) * cos(im);
}

Fortran

real(8) function code(re, im)
    real(8), intent (in) :: re
    real(8), intent (in) :: im
    code = exp(re) * cos(im)
end function

Java

public static double code(double re, double im) {
	return Math.exp(re) * Math.cos(im);
}

Python

def code(re, im):
	return math.exp(re) * math.cos(im)

Julia

function code(re, im)
	return Float64(exp(re) * cos(im))
end

MATLAB

function tmp = code(re, im)
	tmp = exp(re) * cos(im);
end

Wolfram

code[re_, im_] := N[(N[Exp[re], $MachinePrecision] * N[Cos[im], $MachinePrecision]), $MachinePrecision]

Initial Program: 100.0% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ e^{re} \cdot \cos im \end{array} \]

FPCore

(FPCore (re im) :precision binary64 (* (exp re) (cos im)))

C

double code(double re, double im) {
	return exp(re) * cos(im);
}

Fortran

real(8) function code(re, im)
    real(8), intent (in) :: re
    real(8), intent (in) :: im
    code = exp(re) * cos(im)
end function

Java

public static double code(double re, double im) {
	return Math.exp(re) * Math.cos(im);
}

Python

def code(re, im):
	return math.exp(re) * math.cos(im)

Julia

function code(re, im)
	return Float64(exp(re) * cos(im))
end

MATLAB

function tmp = code(re, im)
	tmp = exp(re) * cos(im);
end

Wolfram

code[re_, im_] := N[(N[Exp[re], $MachinePrecision] * N[Cos[im], $MachinePrecision]), $MachinePrecision]

Alternative 1: 100.0% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ e^{re} \cdot \cos im \end{array} \]

FPCore

(FPCore (re im) :precision binary64 (* (exp re) (cos im)))

C

double code(double re, double im) {
	return exp(re) * cos(im);
}

Fortran

real(8) function code(re, im)
    real(8), intent (in) :: re
    real(8), intent (in) :: im
    code = exp(re) * cos(im)
end function

Java

public static double code(double re, double im) {
	return Math.exp(re) * Math.cos(im);
}

Python

def code(re, im):
	return math.exp(re) * math.cos(im)

Julia

function code(re, im)
	return Float64(exp(re) * cos(im))
end

MATLAB

function tmp = code(re, im)
	tmp = exp(re) * cos(im);
end

Wolfram

code[re_, im_] := N[(N[Exp[re], $MachinePrecision] * N[Cos[im], $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 100.0%

   \[e^{re} \cdot \cos im \]

2. Final simplification 100.0%

   \[\leadsto e^{re} \cdot \cos im \]

Alternative 2: 92.4% accurate, 0.7× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;e^{re} \leq 0.99999995:\\ \;\;\;\;e^{re}\\ \mathbf{elif}\;e^{re} \leq 1.000000000005:\\ \;\;\;\;\cos im\\ \mathbf{else}:\\ \;\;\;\;e^{re}\\ \end{array} \end{array} \]

FPCore

(FPCore (re im)
 :precision binary64
 (if (<= (exp re) 0.99999995)
   (exp re)
   (if (<= (exp re) 1.000000000005) (cos im) (exp re))))

C

double code(double re, double im) {
	double tmp;
	if (exp(re) <= 0.99999995) {
		tmp = exp(re);
	} else if (exp(re) <= 1.000000000005) {
		tmp = cos(im);
	} else {
		tmp = exp(re);
	}
	return tmp;
}

Fortran

real(8) function code(re, im)
    real(8), intent (in) :: re
    real(8), intent (in) :: im
    real(8) :: tmp
    if (exp(re) <= 0.99999995d0) then
        tmp = exp(re)
    else if (exp(re) <= 1.000000000005d0) then
        tmp = cos(im)
    else
        tmp = exp(re)
    end if
    code = tmp
end function

Java

public static double code(double re, double im) {
	double tmp;
	if (Math.exp(re) <= 0.99999995) {
		tmp = Math.exp(re);
	} else if (Math.exp(re) <= 1.000000000005) {
		tmp = Math.cos(im);
	} else {
		tmp = Math.exp(re);
	}
	return tmp;
}

Python

def code(re, im):
	tmp = 0
	if math.exp(re) <= 0.99999995:
		tmp = math.exp(re)
	elif math.exp(re) <= 1.000000000005:
		tmp = math.cos(im)
	else:
		tmp = math.exp(re)
	return tmp

Julia

function code(re, im)
	tmp = 0.0
	if (exp(re) <= 0.99999995)
		tmp = exp(re);
	elseif (exp(re) <= 1.000000000005)
		tmp = cos(im);
	else
		tmp = exp(re);
	end
	return tmp
end

MATLAB

function tmp_2 = code(re, im)
	tmp = 0.0;
	if (exp(re) <= 0.99999995)
		tmp = exp(re);
	elseif (exp(re) <= 1.000000000005)
		tmp = cos(im);
	else
		tmp = exp(re);
	end
	tmp_2 = tmp;
end

Wolfram

code[re_, im_] := If[LessEqual[N[Exp[re], $MachinePrecision], 0.99999995], N[Exp[re], $MachinePrecision], If[LessEqual[N[Exp[re], $MachinePrecision], 1.000000000005], N[Cos[im], $MachinePrecision], N[Exp[re], $MachinePrecision]]]

Derivation

1. Split input into 2 regimes

2. if (exp.f64 re) < 0.999999949999999971 or 1.000000000005 < (exp.f64 re)

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in im around 0 83.8%

      \[\leadsto \color{blue}{e^{re}} \]

   if 0.999999949999999971 < (exp.f64 re) < 1.000000000005

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in re around 0 99.6%

      \[\leadsto \color{blue}{\cos im} \]
3. Recombined 2 regimes into one program.

4. Final simplification 92.4%

   \[\leadsto \begin{array}{l} \mathbf{if}\;e^{re} \leq 0.99999995:\\ \;\;\;\;e^{re}\\ \mathbf{elif}\;e^{re} \leq 1.000000000005:\\ \;\;\;\;\cos im\\ \mathbf{else}:\\ \;\;\;\;e^{re}\\ \end{array} \]

Alternative 3: 96.9% accurate, 1.7× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;re \leq -8 \cdot 10^{-8}:\\ \;\;\;\;e^{re}\\ \mathbf{elif}\;re \leq 0.042:\\ \;\;\;\;\cos im \cdot \left(\left(re + 1\right) + re \cdot \left(re \cdot 0.5\right)\right)\\ \mathbf{elif}\;re \leq 1.05 \cdot 10^{+103}:\\ \;\;\;\;e^{re}\\ \mathbf{else}:\\ \;\;\;\;\cos im \cdot \left(\left(re + 1\right) + \left(re \cdot re\right) \cdot \left(0.5 + re \cdot 0.16666666666666666\right)\right)\\ \end{array} \end{array} \]

FPCore

(FPCore (re im)
 :precision binary64
 (if (<= re -8e-8)
   (exp re)
   (if (<= re 0.042)
     (* (cos im) (+ (+ re 1.0) (* re (* re 0.5))))
     (if (<= re 1.05e+103)
       (exp re)
       (*
        (cos im)
        (+ (+ re 1.0) (* (* re re) (+ 0.5 (* re 0.16666666666666666)))))))))

C

double code(double re, double im) {
	double tmp;
	if (re <= -8e-8) {
		tmp = exp(re);
	} else if (re <= 0.042) {
		tmp = cos(im) * ((re + 1.0) + (re * (re * 0.5)));
	} else if (re <= 1.05e+103) {
		tmp = exp(re);
	} else {
		tmp = cos(im) * ((re + 1.0) + ((re * re) * (0.5 + (re * 0.16666666666666666))));
	}
	return tmp;
}

Fortran

real(8) function code(re, im)
    real(8), intent (in) :: re
    real(8), intent (in) :: im
    real(8) :: tmp
    if (re <= (-8d-8)) then
        tmp = exp(re)
    else if (re <= 0.042d0) then
        tmp = cos(im) * ((re + 1.0d0) + (re * (re * 0.5d0)))
    else if (re <= 1.05d+103) then
        tmp = exp(re)
    else
        tmp = cos(im) * ((re + 1.0d0) + ((re * re) * (0.5d0 + (re * 0.16666666666666666d0))))
    end if
    code = tmp
end function

Java

public static double code(double re, double im) {
	double tmp;
	if (re <= -8e-8) {
		tmp = Math.exp(re);
	} else if (re <= 0.042) {
		tmp = Math.cos(im) * ((re + 1.0) + (re * (re * 0.5)));
	} else if (re <= 1.05e+103) {
		tmp = Math.exp(re);
	} else {
		tmp = Math.cos(im) * ((re + 1.0) + ((re * re) * (0.5 + (re * 0.16666666666666666))));
	}
	return tmp;
}

Python

def code(re, im):
	tmp = 0
	if re <= -8e-8:
		tmp = math.exp(re)
	elif re <= 0.042:
		tmp = math.cos(im) * ((re + 1.0) + (re * (re * 0.5)))
	elif re <= 1.05e+103:
		tmp = math.exp(re)
	else:
		tmp = math.cos(im) * ((re + 1.0) + ((re * re) * (0.5 + (re * 0.16666666666666666))))
	return tmp

Julia

function code(re, im)
	tmp = 0.0
	if (re <= -8e-8)
		tmp = exp(re);
	elseif (re <= 0.042)
		tmp = Float64(cos(im) * Float64(Float64(re + 1.0) + Float64(re * Float64(re * 0.5))));
	elseif (re <= 1.05e+103)
		tmp = exp(re);
	else
		tmp = Float64(cos(im) * Float64(Float64(re + 1.0) + Float64(Float64(re * re) * Float64(0.5 + Float64(re * 0.16666666666666666)))));
	end
	return tmp
end

MATLAB

function tmp_2 = code(re, im)
	tmp = 0.0;
	if (re <= -8e-8)
		tmp = exp(re);
	elseif (re <= 0.042)
		tmp = cos(im) * ((re + 1.0) + (re * (re * 0.5)));
	elseif (re <= 1.05e+103)
		tmp = exp(re);
	else
		tmp = cos(im) * ((re + 1.0) + ((re * re) * (0.5 + (re * 0.16666666666666666))));
	end
	tmp_2 = tmp;
end

Wolfram

code[re_, im_] := If[LessEqual[re, -8e-8], N[Exp[re], $MachinePrecision], If[LessEqual[re, 0.042], N[(N[Cos[im], $MachinePrecision] * N[(N[(re + 1.0), $MachinePrecision] + N[(re * N[(re * 0.5), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], If[LessEqual[re, 1.05e+103], N[Exp[re], $MachinePrecision], N[(N[Cos[im], $MachinePrecision] * N[(N[(re + 1.0), $MachinePrecision] + N[(N[(re * re), $MachinePrecision] * N[(0.5 + N[(re * 0.16666666666666666), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]]

Derivation

1. Split input into 3 regimes

2. if re < -8.0000000000000002e-8 or 0.0420000000000000026 < re < 1.0500000000000001e103

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in im around 0 92.5%

      \[\leadsto \color{blue}{e^{re}} \]

   if -8.0000000000000002e-8 < re < 0.0420000000000000026

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in re around 0 100.0%

      \[\leadsto \color{blue}{0.5 \cdot \left(\cos im \cdot {re}^{2}\right) + \left(\cos im \cdot re + \cos im\right)} \]
   3. Step-by-step derivation

      1. *-commutative 100.0%

         \[\leadsto 0.5 \cdot \color{blue}{\left({re}^{2} \cdot \cos im\right)} + \left(\cos im \cdot re + \cos im\right) \]

      2. associate-*r* 100.0%

         \[\leadsto \color{blue}{\left(0.5 \cdot {re}^{2}\right) \cdot \cos im} + \left(\cos im \cdot re + \cos im\right) \]

      3. *-commutative 100.0%

         \[\leadsto \left(0.5 \cdot {re}^{2}\right) \cdot \cos im + \left(\color{blue}{re \cdot \cos im} + \cos im\right) \]

      4. distribute-lft1-in 100.0%

         \[\leadsto \left(0.5 \cdot {re}^{2}\right) \cdot \cos im + \color{blue}{\left(re + 1\right) \cdot \cos im} \]

      5. distribute-rgt-out 100.0%

         \[\leadsto \color{blue}{\cos im \cdot \left(0.5 \cdot {re}^{2} + \left(re + 1\right)\right)} \]

      6. +-commutative 100.0%

         \[\leadsto \cos im \cdot \color{blue}{\left(\left(re + 1\right) + 0.5 \cdot {re}^{2}\right)} \]

      7. *-commutative 100.0%

         \[\leadsto \cos im \cdot \left(\left(re + 1\right) + \color{blue}{{re}^{2} \cdot 0.5}\right) \]

      8. unpow2 100.0%

         \[\leadsto \cos im \cdot \left(\left(re + 1\right) + \color{blue}{\left(re \cdot re\right)} \cdot 0.5\right) \]

      9. associate-*l* 100.0%

         \[\leadsto \cos im \cdot \left(\left(re + 1\right) + \color{blue}{re \cdot \left(re \cdot 0.5\right)}\right) \]

   4. Simplified 100.0%

      \[\leadsto \color{blue}{\cos im \cdot \left(\left(re + 1\right) + re \cdot \left(re \cdot 0.5\right)\right)} \]

   if 1.0500000000000001e103 < re

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in re around 0 100.0%

      \[\leadsto \color{blue}{0.16666666666666666 \cdot \left(\cos im \cdot {re}^{3}\right) + \left(0.5 \cdot \left(\cos im \cdot {re}^{2}\right) + \left(\cos im \cdot re + \cos im\right)\right)} \]
   3. Step-by-step derivation

      1. associate-+r+ 100.0%

         \[\leadsto \color{blue}{\left(0.16666666666666666 \cdot \left(\cos im \cdot {re}^{3}\right) + 0.5 \cdot \left(\cos im \cdot {re}^{2}\right)\right) + \left(\cos im \cdot re + \cos im\right)} \]

      2. *-commutative 100.0%

         \[\leadsto \left(0.16666666666666666 \cdot \color{blue}{\left({re}^{3} \cdot \cos im\right)} + 0.5 \cdot \left(\cos im \cdot {re}^{2}\right)\right) + \left(\cos im \cdot re + \cos im\right) \]

      3. associate-*r* 100.0%

         \[\leadsto \left(\color{blue}{\left(0.16666666666666666 \cdot {re}^{3}\right) \cdot \cos im} + 0.5 \cdot \left(\cos im \cdot {re}^{2}\right)\right) + \left(\cos im \cdot re + \cos im\right) \]

      4. *-commutative 100.0%

         \[\leadsto \left(\left(0.16666666666666666 \cdot {re}^{3}\right) \cdot \cos im + 0.5 \cdot \color{blue}{\left({re}^{2} \cdot \cos im\right)}\right) + \left(\cos im \cdot re + \cos im\right) \]

      5. associate-*r* 100.0%

         \[\leadsto \left(\left(0.16666666666666666 \cdot {re}^{3}\right) \cdot \cos im + \color{blue}{\left(0.5 \cdot {re}^{2}\right) \cdot \cos im}\right) + \left(\cos im \cdot re + \cos im\right) \]

      6. distribute-rgt-out 100.0%

         \[\leadsto \color{blue}{\cos im \cdot \left(0.16666666666666666 \cdot {re}^{3} + 0.5 \cdot {re}^{2}\right)} + \left(\cos im \cdot re + \cos im\right) \]

      7. *-commutative 100.0%

         \[\leadsto \color{blue}{\left(0.16666666666666666 \cdot {re}^{3} + 0.5 \cdot {re}^{2}\right) \cdot \cos im} + \left(\cos im \cdot re + \cos im\right) \]

      8. *-commutative 100.0%

         \[\leadsto \left(0.16666666666666666 \cdot {re}^{3} + 0.5 \cdot {re}^{2}\right) \cdot \cos im + \left(\color{blue}{re \cdot \cos im} + \cos im\right) \]

      9. distribute-lft1-in 100.0%

         \[\leadsto \left(0.16666666666666666 \cdot {re}^{3} + 0.5 \cdot {re}^{2}\right) \cdot \cos im + \color{blue}{\left(re + 1\right) \cdot \cos im} \]

      10. distribute-rgt-out 100.0%

          \[\leadsto \color{blue}{\cos im \cdot \left(\left(0.16666666666666666 \cdot {re}^{3} + 0.5 \cdot {re}^{2}\right) + \left(re + 1\right)\right)} \]

      11. +-commutative 100.0%

          \[\leadsto \cos im \cdot \color{blue}{\left(\left(re + 1\right) + \left(0.16666666666666666 \cdot {re}^{3} + 0.5 \cdot {re}^{2}\right)\right)} \]

      12. cube-mult 100.0%

          \[\leadsto \cos im \cdot \left(\left(re + 1\right) + \left(0.16666666666666666 \cdot \color{blue}{\left(re \cdot \left(re \cdot re\right)\right)} + 0.5 \cdot {re}^{2}\right)\right) \]

      13. unpow2 100.0%

          \[\leadsto \cos im \cdot \left(\left(re + 1\right) + \left(0.16666666666666666 \cdot \left(re \cdot \color{blue}{{re}^{2}}\right) + 0.5 \cdot {re}^{2}\right)\right) \]

      14. associate-*r* 100.0%

          \[\leadsto \cos im \cdot \left(\left(re + 1\right) + \left(\color{blue}{\left(0.16666666666666666 \cdot re\right) \cdot {re}^{2}} + 0.5 \cdot {re}^{2}\right)\right) \]

   4. Simplified 100.0%

      \[\leadsto \color{blue}{\cos im \cdot \left(\left(re + 1\right) + \left(re \cdot re\right) \cdot \left(0.5 + re \cdot 0.16666666666666666\right)\right)} \]
3. Recombined 3 regimes into one program.

4. Final simplification 97.6%

   \[\leadsto \begin{array}{l} \mathbf{if}\;re \leq -8 \cdot 10^{-8}:\\ \;\;\;\;e^{re}\\ \mathbf{elif}\;re \leq 0.042:\\ \;\;\;\;\cos im \cdot \left(\left(re + 1\right) + re \cdot \left(re \cdot 0.5\right)\right)\\ \mathbf{elif}\;re \leq 1.05 \cdot 10^{+103}:\\ \;\;\;\;e^{re}\\ \mathbf{else}:\\ \;\;\;\;\cos im \cdot \left(\left(re + 1\right) + \left(re \cdot re\right) \cdot \left(0.5 + re \cdot 0.16666666666666666\right)\right)\\ \end{array} \]

Alternative 4: 95.8% accurate, 1.7× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;re \leq -8 \cdot 10^{-8} \lor \neg \left(re \leq 0.0021\right) \land re \leq 1.9 \cdot 10^{+154}:\\ \;\;\;\;e^{re}\\ \mathbf{else}:\\ \;\;\;\;\cos im \cdot \left(\left(re + 1\right) + re \cdot \left(re \cdot 0.5\right)\right)\\ \end{array} \end{array} \]

FPCore

(FPCore (re im)
 :precision binary64
 (if (or (<= re -8e-8) (and (not (<= re 0.0021)) (<= re 1.9e+154)))
   (exp re)
   (* (cos im) (+ (+ re 1.0) (* re (* re 0.5))))))

C

double code(double re, double im) {
	double tmp;
	if ((re <= -8e-8) || (!(re <= 0.0021) && (re <= 1.9e+154))) {
		tmp = exp(re);
	} else {
		tmp = cos(im) * ((re + 1.0) + (re * (re * 0.5)));
	}
	return tmp;
}

Fortran

real(8) function code(re, im)
    real(8), intent (in) :: re
    real(8), intent (in) :: im
    real(8) :: tmp
    if ((re <= (-8d-8)) .or. (.not. (re <= 0.0021d0)) .and. (re <= 1.9d+154)) then
        tmp = exp(re)
    else
        tmp = cos(im) * ((re + 1.0d0) + (re * (re * 0.5d0)))
    end if
    code = tmp
end function

Java

public static double code(double re, double im) {
	double tmp;
	if ((re <= -8e-8) || (!(re <= 0.0021) && (re <= 1.9e+154))) {
		tmp = Math.exp(re);
	} else {
		tmp = Math.cos(im) * ((re + 1.0) + (re * (re * 0.5)));
	}
	return tmp;
}

Python

def code(re, im):
	tmp = 0
	if (re <= -8e-8) or (not (re <= 0.0021) and (re <= 1.9e+154)):
		tmp = math.exp(re)
	else:
		tmp = math.cos(im) * ((re + 1.0) + (re * (re * 0.5)))
	return tmp

Julia

function code(re, im)
	tmp = 0.0
	if ((re <= -8e-8) || (!(re <= 0.0021) && (re <= 1.9e+154)))
		tmp = exp(re);
	else
		tmp = Float64(cos(im) * Float64(Float64(re + 1.0) + Float64(re * Float64(re * 0.5))));
	end
	return tmp
end

MATLAB

function tmp_2 = code(re, im)
	tmp = 0.0;
	if ((re <= -8e-8) || (~((re <= 0.0021)) && (re <= 1.9e+154)))
		tmp = exp(re);
	else
		tmp = cos(im) * ((re + 1.0) + (re * (re * 0.5)));
	end
	tmp_2 = tmp;
end

Wolfram

code[re_, im_] := If[Or[LessEqual[re, -8e-8], And[N[Not[LessEqual[re, 0.0021]], $MachinePrecision], LessEqual[re, 1.9e+154]]], N[Exp[re], $MachinePrecision], N[(N[Cos[im], $MachinePrecision] * N[(N[(re + 1.0), $MachinePrecision] + N[(re * N[(re * 0.5), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if re < -8.0000000000000002e-8 or 0.00209999999999999987 < re < 1.8999999999999999e154

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in im around 0 90.5%

      \[\leadsto \color{blue}{e^{re}} \]

   if -8.0000000000000002e-8 < re < 0.00209999999999999987 or 1.8999999999999999e154 < re

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in re around 0 100.0%

      \[\leadsto \color{blue}{0.5 \cdot \left(\cos im \cdot {re}^{2}\right) + \left(\cos im \cdot re + \cos im\right)} \]
   3. Step-by-step derivation

      1. *-commutative 100.0%

         \[\leadsto 0.5 \cdot \color{blue}{\left({re}^{2} \cdot \cos im\right)} + \left(\cos im \cdot re + \cos im\right) \]

      2. associate-*r* 100.0%

         \[\leadsto \color{blue}{\left(0.5 \cdot {re}^{2}\right) \cdot \cos im} + \left(\cos im \cdot re + \cos im\right) \]

      3. *-commutative 100.0%

         \[\leadsto \left(0.5 \cdot {re}^{2}\right) \cdot \cos im + \left(\color{blue}{re \cdot \cos im} + \cos im\right) \]

      4. distribute-lft1-in 100.0%

         \[\leadsto \left(0.5 \cdot {re}^{2}\right) \cdot \cos im + \color{blue}{\left(re + 1\right) \cdot \cos im} \]

      5. distribute-rgt-out 100.0%

         \[\leadsto \color{blue}{\cos im \cdot \left(0.5 \cdot {re}^{2} + \left(re + 1\right)\right)} \]

      6. +-commutative 100.0%

         \[\leadsto \cos im \cdot \color{blue}{\left(\left(re + 1\right) + 0.5 \cdot {re}^{2}\right)} \]

      7. *-commutative 100.0%

         \[\leadsto \cos im \cdot \left(\left(re + 1\right) + \color{blue}{{re}^{2} \cdot 0.5}\right) \]

      8. unpow2 100.0%

         \[\leadsto \cos im \cdot \left(\left(re + 1\right) + \color{blue}{\left(re \cdot re\right)} \cdot 0.5\right) \]

      9. associate-*l* 100.0%

         \[\leadsto \cos im \cdot \left(\left(re + 1\right) + \color{blue}{re \cdot \left(re \cdot 0.5\right)}\right) \]

   4. Simplified 100.0%

      \[\leadsto \color{blue}{\cos im \cdot \left(\left(re + 1\right) + re \cdot \left(re \cdot 0.5\right)\right)} \]
3. Recombined 2 regimes into one program.

4. Final simplification 96.9%

   \[\leadsto \begin{array}{l} \mathbf{if}\;re \leq -8 \cdot 10^{-8} \lor \neg \left(re \leq 0.0021\right) \land re \leq 1.9 \cdot 10^{+154}:\\ \;\;\;\;e^{re}\\ \mathbf{else}:\\ \;\;\;\;\cos im \cdot \left(\left(re + 1\right) + re \cdot \left(re \cdot 0.5\right)\right)\\ \end{array} \]

Alternative 5: 92.9% accurate, 1.9× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;re \leq -5 \cdot 10^{-8}:\\ \;\;\;\;e^{re}\\ \mathbf{elif}\;re \leq 0.03:\\ \;\;\;\;\cos im \cdot \left(re + 1\right)\\ \mathbf{else}:\\ \;\;\;\;e^{re}\\ \end{array} \end{array} \]

FPCore

(FPCore (re im)
 :precision binary64
 (if (<= re -5e-8)
   (exp re)
   (if (<= re 0.03) (* (cos im) (+ re 1.0)) (exp re))))

C

double code(double re, double im) {
	double tmp;
	if (re <= -5e-8) {
		tmp = exp(re);
	} else if (re <= 0.03) {
		tmp = cos(im) * (re + 1.0);
	} else {
		tmp = exp(re);
	}
	return tmp;
}

Fortran

real(8) function code(re, im)
    real(8), intent (in) :: re
    real(8), intent (in) :: im
    real(8) :: tmp
    if (re <= (-5d-8)) then
        tmp = exp(re)
    else if (re <= 0.03d0) then
        tmp = cos(im) * (re + 1.0d0)
    else
        tmp = exp(re)
    end if
    code = tmp
end function

Java

public static double code(double re, double im) {
	double tmp;
	if (re <= -5e-8) {
		tmp = Math.exp(re);
	} else if (re <= 0.03) {
		tmp = Math.cos(im) * (re + 1.0);
	} else {
		tmp = Math.exp(re);
	}
	return tmp;
}

Python

def code(re, im):
	tmp = 0
	if re <= -5e-8:
		tmp = math.exp(re)
	elif re <= 0.03:
		tmp = math.cos(im) * (re + 1.0)
	else:
		tmp = math.exp(re)
	return tmp

Julia

function code(re, im)
	tmp = 0.0
	if (re <= -5e-8)
		tmp = exp(re);
	elseif (re <= 0.03)
		tmp = Float64(cos(im) * Float64(re + 1.0));
	else
		tmp = exp(re);
	end
	return tmp
end

MATLAB

function tmp_2 = code(re, im)
	tmp = 0.0;
	if (re <= -5e-8)
		tmp = exp(re);
	elseif (re <= 0.03)
		tmp = cos(im) * (re + 1.0);
	else
		tmp = exp(re);
	end
	tmp_2 = tmp;
end

Wolfram

code[re_, im_] := If[LessEqual[re, -5e-8], N[Exp[re], $MachinePrecision], If[LessEqual[re, 0.03], N[(N[Cos[im], $MachinePrecision] * N[(re + 1.0), $MachinePrecision]), $MachinePrecision], N[Exp[re], $MachinePrecision]]]

Derivation

1. Split input into 2 regimes

2. if re < -4.9999999999999998e-8 or 0.029999999999999999 < re

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in im around 0 84.1%

      \[\leadsto \color{blue}{e^{re}} \]

   if -4.9999999999999998e-8 < re < 0.029999999999999999

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in re around 0 99.8%

      \[\leadsto \color{blue}{\cos im \cdot re + \cos im} \]
   3. Step-by-step derivation

      1. *-rgt-identity 99.8%

         \[\leadsto \cos im \cdot re + \color{blue}{\cos im \cdot 1} \]

      2. distribute-lft-in 99.8%

         \[\leadsto \color{blue}{\cos im \cdot \left(re + 1\right)} \]

   4. Simplified 99.8%

      \[\leadsto \color{blue}{\cos im \cdot \left(re + 1\right)} \]
3. Recombined 2 regimes into one program.

4. Final simplification 92.9%

   \[\leadsto \begin{array}{l} \mathbf{if}\;re \leq -5 \cdot 10^{-8}:\\ \;\;\;\;e^{re}\\ \mathbf{elif}\;re \leq 0.03:\\ \;\;\;\;\cos im \cdot \left(re + 1\right)\\ \mathbf{else}:\\ \;\;\;\;e^{re}\\ \end{array} \]

Alternative 6: 53.6% accurate, 2.0× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;re \leq 6.4 \cdot 10^{-12}:\\ \;\;\;\;\cos im\\ \mathbf{else}:\\ \;\;\;\;\left(re + 1\right) + \left(re \cdot -0.5\right) \cdot \left(im \cdot im\right)\\ \end{array} \end{array} \]

FPCore

(FPCore (re im)
 :precision binary64
 (if (<= re 6.4e-12) (cos im) (+ (+ re 1.0) (* (* re -0.5) (* im im)))))

C

double code(double re, double im) {
	double tmp;
	if (re <= 6.4e-12) {
		tmp = cos(im);
	} else {
		tmp = (re + 1.0) + ((re * -0.5) * (im * im));
	}
	return tmp;
}

Fortran

real(8) function code(re, im)
    real(8), intent (in) :: re
    real(8), intent (in) :: im
    real(8) :: tmp
    if (re <= 6.4d-12) then
        tmp = cos(im)
    else
        tmp = (re + 1.0d0) + ((re * (-0.5d0)) * (im * im))
    end if
    code = tmp
end function

Java

public static double code(double re, double im) {
	double tmp;
	if (re <= 6.4e-12) {
		tmp = Math.cos(im);
	} else {
		tmp = (re + 1.0) + ((re * -0.5) * (im * im));
	}
	return tmp;
}

Python

def code(re, im):
	tmp = 0
	if re <= 6.4e-12:
		tmp = math.cos(im)
	else:
		tmp = (re + 1.0) + ((re * -0.5) * (im * im))
	return tmp

Julia

function code(re, im)
	tmp = 0.0
	if (re <= 6.4e-12)
		tmp = cos(im);
	else
		tmp = Float64(Float64(re + 1.0) + Float64(Float64(re * -0.5) * Float64(im * im)));
	end
	return tmp
end

MATLAB

function tmp_2 = code(re, im)
	tmp = 0.0;
	if (re <= 6.4e-12)
		tmp = cos(im);
	else
		tmp = (re + 1.0) + ((re * -0.5) * (im * im));
	end
	tmp_2 = tmp;
end

Wolfram

code[re_, im_] := If[LessEqual[re, 6.4e-12], N[Cos[im], $MachinePrecision], N[(N[(re + 1.0), $MachinePrecision] + N[(N[(re * -0.5), $MachinePrecision] * N[(im * im), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if re < 6.4000000000000002e-12

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in re around 0 70.5%

      \[\leadsto \color{blue}{\cos im} \]

   if 6.4000000000000002e-12 < re

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in re around 0 10.3%

      \[\leadsto \color{blue}{\cos im \cdot re + \cos im} \]
   3. Step-by-step derivation

      1. *-rgt-identity 10.3%

         \[\leadsto \cos im \cdot re + \color{blue}{\cos im \cdot 1} \]

      2. distribute-lft-in 10.3%

         \[\leadsto \color{blue}{\cos im \cdot \left(re + 1\right)} \]

   4. Simplified 10.3%

      \[\leadsto \color{blue}{\cos im \cdot \left(re + 1\right)} \]

   5. Taylor expanded in im around 0 36.1%

      \[\leadsto \color{blue}{1 + \left(re + -0.5 \cdot \left(\left(1 + re\right) \cdot {im}^{2}\right)\right)} \]
   6. Step-by-step derivation

      1. associate-+r+ 36.1%

         \[\leadsto \color{blue}{\left(1 + re\right) + -0.5 \cdot \left(\left(1 + re\right) \cdot {im}^{2}\right)} \]

      2. +-commutative 36.1%

         \[\leadsto \color{blue}{\left(re + 1\right)} + -0.5 \cdot \left(\left(1 + re\right) \cdot {im}^{2}\right) \]

      3. +-commutative 36.1%

         \[\leadsto \left(re + 1\right) + -0.5 \cdot \left(\color{blue}{\left(re + 1\right)} \cdot {im}^{2}\right) \]

      4. *-commutative 36.1%

         \[\leadsto \left(re + 1\right) + -0.5 \cdot \color{blue}{\left({im}^{2} \cdot \left(re + 1\right)\right)} \]

      5. unpow2 36.1%

         \[\leadsto \left(re + 1\right) + -0.5 \cdot \left(\color{blue}{\left(im \cdot im\right)} \cdot \left(re + 1\right)\right) \]

   7. Simplified 36.1%

      \[\leadsto \color{blue}{\left(re + 1\right) + -0.5 \cdot \left(\left(im \cdot im\right) \cdot \left(re + 1\right)\right)} \]

   8. Taylor expanded in re around inf 36.1%

      \[\leadsto \left(re + 1\right) + \color{blue}{-0.5 \cdot \left(re \cdot {im}^{2}\right)} \]
   9. Step-by-step derivation

      1. unpow2 36.1%

         \[\leadsto \left(re + 1\right) + -0.5 \cdot \left(re \cdot \color{blue}{\left(im \cdot im\right)}\right) \]

      2. associate-*r* 36.1%

         \[\leadsto \left(re + 1\right) + \color{blue}{\left(-0.5 \cdot re\right) \cdot \left(im \cdot im\right)} \]

   10. Simplified 36.1%

       \[\leadsto \left(re + 1\right) + \color{blue}{\left(-0.5 \cdot re\right) \cdot \left(im \cdot im\right)} \]
3. Recombined 2 regimes into one program.

4. Final simplification 63.4%

   \[\leadsto \begin{array}{l} \mathbf{if}\;re \leq 6.4 \cdot 10^{-12}:\\ \;\;\;\;\cos im\\ \mathbf{else}:\\ \;\;\;\;\left(re + 1\right) + \left(re \cdot -0.5\right) \cdot \left(im \cdot im\right)\\ \end{array} \]

Alternative 7: 31.7% accurate, 18.4× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;re \leq 7.2 \cdot 10^{+24}:\\ \;\;\;\;re + 1\\ \mathbf{else}:\\ \;\;\;\;re \cdot \left(1 + im \cdot \left(im \cdot -0.5\right)\right)\\ \end{array} \end{array} \]

FPCore

(FPCore (re im)
 :precision binary64
 (if (<= re 7.2e+24) (+ re 1.0) (* re (+ 1.0 (* im (* im -0.5))))))

C

double code(double re, double im) {
	double tmp;
	if (re <= 7.2e+24) {
		tmp = re + 1.0;
	} else {
		tmp = re * (1.0 + (im * (im * -0.5)));
	}
	return tmp;
}

Fortran

real(8) function code(re, im)
    real(8), intent (in) :: re
    real(8), intent (in) :: im
    real(8) :: tmp
    if (re <= 7.2d+24) then
        tmp = re + 1.0d0
    else
        tmp = re * (1.0d0 + (im * (im * (-0.5d0))))
    end if
    code = tmp
end function

Java

public static double code(double re, double im) {
	double tmp;
	if (re <= 7.2e+24) {
		tmp = re + 1.0;
	} else {
		tmp = re * (1.0 + (im * (im * -0.5)));
	}
	return tmp;
}

Python

def code(re, im):
	tmp = 0
	if re <= 7.2e+24:
		tmp = re + 1.0
	else:
		tmp = re * (1.0 + (im * (im * -0.5)))
	return tmp

Julia

function code(re, im)
	tmp = 0.0
	if (re <= 7.2e+24)
		tmp = Float64(re + 1.0);
	else
		tmp = Float64(re * Float64(1.0 + Float64(im * Float64(im * -0.5))));
	end
	return tmp
end

MATLAB

function tmp_2 = code(re, im)
	tmp = 0.0;
	if (re <= 7.2e+24)
		tmp = re + 1.0;
	else
		tmp = re * (1.0 + (im * (im * -0.5)));
	end
	tmp_2 = tmp;
end

Wolfram

code[re_, im_] := If[LessEqual[re, 7.2e+24], N[(re + 1.0), $MachinePrecision], N[(re * N[(1.0 + N[(im * N[(im * -0.5), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if re < 7.19999999999999966e24

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in re around 0 70.4%

      \[\leadsto \color{blue}{\cos im \cdot re + \cos im} \]
   3. Step-by-step derivation

      1. *-rgt-identity 70.4%

         \[\leadsto \cos im \cdot re + \color{blue}{\cos im \cdot 1} \]

      2. distribute-lft-in 70.4%

         \[\leadsto \color{blue}{\cos im \cdot \left(re + 1\right)} \]

   4. Simplified 70.4%

      \[\leadsto \color{blue}{\cos im \cdot \left(re + 1\right)} \]

   5. Taylor expanded in im around 0 36.4%

      \[\leadsto \color{blue}{1 + \left(re + -0.5 \cdot \left(\left(1 + re\right) \cdot {im}^{2}\right)\right)} \]
   6. Step-by-step derivation

      1. +-commutative 36.4%

         \[\leadsto 1 + \color{blue}{\left(-0.5 \cdot \left(\left(1 + re\right) \cdot {im}^{2}\right) + re\right)} \]

      2. fma-def 36.4%

         \[\leadsto 1 + \color{blue}{\mathsf{fma}\left(-0.5, \left(1 + re\right) \cdot {im}^{2}, re\right)} \]

      3. +-commutative 36.4%

         \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{\left(re + 1\right)} \cdot {im}^{2}, re\right) \]

      4. *-commutative 36.4%

         \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{{im}^{2} \cdot \left(re + 1\right)}, re\right) \]

      5. unpow2 36.4%

         \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{\left(im \cdot im\right)} \cdot \left(re + 1\right), re\right) \]

      6. associate-*l* 36.4%

         \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{im \cdot \left(im \cdot \left(re + 1\right)\right)}, re\right) \]

   7. Simplified 36.4%

      \[\leadsto \color{blue}{1 + \mathsf{fma}\left(-0.5, im \cdot \left(im \cdot \left(re + 1\right)\right), re\right)} \]

   8. Taylor expanded in im around 0 39.5%

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

   if 7.19999999999999966e24 < re

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in re around 0 5.5%

      \[\leadsto \color{blue}{\cos im \cdot re + \cos im} \]
   3. Step-by-step derivation

      1. *-rgt-identity 5.5%

         \[\leadsto \cos im \cdot re + \color{blue}{\cos im \cdot 1} \]

      2. distribute-lft-in 5.5%

         \[\leadsto \color{blue}{\cos im \cdot \left(re + 1\right)} \]

   4. Simplified 5.5%

      \[\leadsto \color{blue}{\cos im \cdot \left(re + 1\right)} \]

   5. Taylor expanded in im around 0 36.4%

      \[\leadsto \color{blue}{1 + \left(re + -0.5 \cdot \left(\left(1 + re\right) \cdot {im}^{2}\right)\right)} \]
   6. Step-by-step derivation

      1. associate-+r+ 36.4%

         \[\leadsto \color{blue}{\left(1 + re\right) + -0.5 \cdot \left(\left(1 + re\right) \cdot {im}^{2}\right)} \]

      2. +-commutative 36.4%

         \[\leadsto \color{blue}{\left(re + 1\right)} + -0.5 \cdot \left(\left(1 + re\right) \cdot {im}^{2}\right) \]

      3. +-commutative 36.4%

         \[\leadsto \left(re + 1\right) + -0.5 \cdot \left(\color{blue}{\left(re + 1\right)} \cdot {im}^{2}\right) \]

      4. *-commutative 36.4%

         \[\leadsto \left(re + 1\right) + -0.5 \cdot \color{blue}{\left({im}^{2} \cdot \left(re + 1\right)\right)} \]

      5. unpow2 36.4%

         \[\leadsto \left(re + 1\right) + -0.5 \cdot \left(\color{blue}{\left(im \cdot im\right)} \cdot \left(re + 1\right)\right) \]

   7. Simplified 36.4%

      \[\leadsto \color{blue}{\left(re + 1\right) + -0.5 \cdot \left(\left(im \cdot im\right) \cdot \left(re + 1\right)\right)} \]

   8. Taylor expanded in re around inf 36.4%

      \[\leadsto \left(re + 1\right) + \color{blue}{-0.5 \cdot \left(re \cdot {im}^{2}\right)} \]
   9. Step-by-step derivation

      1. unpow2 36.4%

         \[\leadsto \left(re + 1\right) + -0.5 \cdot \left(re \cdot \color{blue}{\left(im \cdot im\right)}\right) \]

      2. associate-*r* 36.4%

         \[\leadsto \left(re + 1\right) + \color{blue}{\left(-0.5 \cdot re\right) \cdot \left(im \cdot im\right)} \]

   10. Simplified 36.4%

       \[\leadsto \left(re + 1\right) + \color{blue}{\left(-0.5 \cdot re\right) \cdot \left(im \cdot im\right)} \]

   11. Taylor expanded in re around inf 36.4%

       \[\leadsto \color{blue}{\left(1 + -0.5 \cdot {im}^{2}\right) \cdot re} \]
   12. Step-by-step derivation

       1. *-commutative 36.4%

          \[\leadsto \color{blue}{re \cdot \left(1 + -0.5 \cdot {im}^{2}\right)} \]

       2. unpow2 36.4%

          \[\leadsto re \cdot \left(1 + -0.5 \cdot \color{blue}{\left(im \cdot im\right)}\right) \]

       3. *-commutative 36.4%

          \[\leadsto re \cdot \left(1 + \color{blue}{\left(im \cdot im\right) \cdot -0.5}\right) \]

       4. associate-*r* 36.4%

          \[\leadsto re \cdot \left(1 + \color{blue}{im \cdot \left(im \cdot -0.5\right)}\right) \]

   13. Simplified 36.4%

       \[\leadsto \color{blue}{re \cdot \left(1 + im \cdot \left(im \cdot -0.5\right)\right)} \]
3. Recombined 2 regimes into one program.

4. Final simplification 38.9%

   \[\leadsto \begin{array}{l} \mathbf{if}\;re \leq 7.2 \cdot 10^{+24}:\\ \;\;\;\;re + 1\\ \mathbf{else}:\\ \;\;\;\;re \cdot \left(1 + im \cdot \left(im \cdot -0.5\right)\right)\\ \end{array} \]

Alternative 8: 30.0% accurate, 22.4× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;re \leq 7.2 \cdot 10^{+24}:\\ \;\;\;\;re + 1\\ \mathbf{else}:\\ \;\;\;\;1 + -0.5 \cdot \left(im \cdot im\right)\\ \end{array} \end{array} \]

FPCore

(FPCore (re im)
 :precision binary64
 (if (<= re 7.2e+24) (+ re 1.0) (+ 1.0 (* -0.5 (* im im)))))

C

double code(double re, double im) {
	double tmp;
	if (re <= 7.2e+24) {
		tmp = re + 1.0;
	} else {
		tmp = 1.0 + (-0.5 * (im * im));
	}
	return tmp;
}

Fortran

real(8) function code(re, im)
    real(8), intent (in) :: re
    real(8), intent (in) :: im
    real(8) :: tmp
    if (re <= 7.2d+24) then
        tmp = re + 1.0d0
    else
        tmp = 1.0d0 + ((-0.5d0) * (im * im))
    end if
    code = tmp
end function

Java

public static double code(double re, double im) {
	double tmp;
	if (re <= 7.2e+24) {
		tmp = re + 1.0;
	} else {
		tmp = 1.0 + (-0.5 * (im * im));
	}
	return tmp;
}

Python

def code(re, im):
	tmp = 0
	if re <= 7.2e+24:
		tmp = re + 1.0
	else:
		tmp = 1.0 + (-0.5 * (im * im))
	return tmp

Julia

function code(re, im)
	tmp = 0.0
	if (re <= 7.2e+24)
		tmp = Float64(re + 1.0);
	else
		tmp = Float64(1.0 + Float64(-0.5 * Float64(im * im)));
	end
	return tmp
end

MATLAB

function tmp_2 = code(re, im)
	tmp = 0.0;
	if (re <= 7.2e+24)
		tmp = re + 1.0;
	else
		tmp = 1.0 + (-0.5 * (im * im));
	end
	tmp_2 = tmp;
end

Wolfram

code[re_, im_] := If[LessEqual[re, 7.2e+24], N[(re + 1.0), $MachinePrecision], N[(1.0 + N[(-0.5 * N[(im * im), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if re < 7.19999999999999966e24

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in re around 0 70.4%

      \[\leadsto \color{blue}{\cos im \cdot re + \cos im} \]
   3. Step-by-step derivation

      1. *-rgt-identity 70.4%

         \[\leadsto \cos im \cdot re + \color{blue}{\cos im \cdot 1} \]

      2. distribute-lft-in 70.4%

         \[\leadsto \color{blue}{\cos im \cdot \left(re + 1\right)} \]

   4. Simplified 70.4%

      \[\leadsto \color{blue}{\cos im \cdot \left(re + 1\right)} \]

   5. Taylor expanded in im around 0 36.4%

      \[\leadsto \color{blue}{1 + \left(re + -0.5 \cdot \left(\left(1 + re\right) \cdot {im}^{2}\right)\right)} \]
   6. Step-by-step derivation

      1. +-commutative 36.4%

         \[\leadsto 1 + \color{blue}{\left(-0.5 \cdot \left(\left(1 + re\right) \cdot {im}^{2}\right) + re\right)} \]

      2. fma-def 36.4%

         \[\leadsto 1 + \color{blue}{\mathsf{fma}\left(-0.5, \left(1 + re\right) \cdot {im}^{2}, re\right)} \]

      3. +-commutative 36.4%

         \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{\left(re + 1\right)} \cdot {im}^{2}, re\right) \]

      4. *-commutative 36.4%

         \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{{im}^{2} \cdot \left(re + 1\right)}, re\right) \]

      5. unpow2 36.4%

         \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{\left(im \cdot im\right)} \cdot \left(re + 1\right), re\right) \]

      6. associate-*l* 36.4%

         \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{im \cdot \left(im \cdot \left(re + 1\right)\right)}, re\right) \]

   7. Simplified 36.4%

      \[\leadsto \color{blue}{1 + \mathsf{fma}\left(-0.5, im \cdot \left(im \cdot \left(re + 1\right)\right), re\right)} \]

   8. Taylor expanded in im around 0 39.5%

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

   if 7.19999999999999966e24 < re

   1. Initial program 100.0%

      \[e^{re} \cdot \cos im \]

   2. Taylor expanded in re around 0 5.5%

      \[\leadsto \color{blue}{\cos im \cdot re + \cos im} \]
   3. Step-by-step derivation

      1. *-rgt-identity 5.5%

         \[\leadsto \cos im \cdot re + \color{blue}{\cos im \cdot 1} \]

      2. distribute-lft-in 5.5%

         \[\leadsto \color{blue}{\cos im \cdot \left(re + 1\right)} \]

   4. Simplified 5.5%

      \[\leadsto \color{blue}{\cos im \cdot \left(re + 1\right)} \]

   5. Taylor expanded in im around 0 36.4%

      \[\leadsto \color{blue}{1 + \left(re + -0.5 \cdot \left(\left(1 + re\right) \cdot {im}^{2}\right)\right)} \]
   6. Step-by-step derivation

      1. +-commutative 36.4%

         \[\leadsto 1 + \color{blue}{\left(-0.5 \cdot \left(\left(1 + re\right) \cdot {im}^{2}\right) + re\right)} \]

      2. fma-def 36.4%

         \[\leadsto 1 + \color{blue}{\mathsf{fma}\left(-0.5, \left(1 + re\right) \cdot {im}^{2}, re\right)} \]

      3. +-commutative 36.4%

         \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{\left(re + 1\right)} \cdot {im}^{2}, re\right) \]

      4. *-commutative 36.4%

         \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{{im}^{2} \cdot \left(re + 1\right)}, re\right) \]

      5. unpow2 36.4%

         \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{\left(im \cdot im\right)} \cdot \left(re + 1\right), re\right) \]

      6. associate-*l* 36.4%

         \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{im \cdot \left(im \cdot \left(re + 1\right)\right)}, re\right) \]

   7. Simplified 36.4%

      \[\leadsto \color{blue}{1 + \mathsf{fma}\left(-0.5, im \cdot \left(im \cdot \left(re + 1\right)\right), re\right)} \]

   8. Taylor expanded in re around 0 25.7%

      \[\leadsto 1 + \color{blue}{-0.5 \cdot {im}^{2}} \]
   9. Step-by-step derivation

      1. unpow2 25.7%

         \[\leadsto 1 + -0.5 \cdot \color{blue}{\left(im \cdot im\right)} \]

   10. Simplified 25.7%

       \[\leadsto 1 + \color{blue}{-0.5 \cdot \left(im \cdot im\right)} \]
3. Recombined 2 regimes into one program.

4. Final simplification 36.9%

   \[\leadsto \begin{array}{l} \mathbf{if}\;re \leq 7.2 \cdot 10^{+24}:\\ \;\;\;\;re + 1\\ \mathbf{else}:\\ \;\;\;\;1 + -0.5 \cdot \left(im \cdot im\right)\\ \end{array} \]

Alternative 9: 27.7% accurate, 67.7× speedup

Math

\[\begin{array}{l} \\ re + 1 \end{array} \]

FPCore

(FPCore (re im) :precision binary64 (+ re 1.0))

C

double code(double re, double im) {
	return re + 1.0;
}

Fortran

real(8) function code(re, im)
    real(8), intent (in) :: re
    real(8), intent (in) :: im
    code = re + 1.0d0
end function

Java

public static double code(double re, double im) {
	return re + 1.0;
}

Python

def code(re, im):
	return re + 1.0

Julia

function code(re, im)
	return Float64(re + 1.0)
end

MATLAB

function tmp = code(re, im)
	tmp = re + 1.0;
end

Wolfram

code[re_, im_] := N[(re + 1.0), $MachinePrecision]

Derivation

1. Initial program 100.0%

   \[e^{re} \cdot \cos im \]

2. Taylor expanded in re around 0 58.5%

   \[\leadsto \color{blue}{\cos im \cdot re + \cos im} \]
3. Step-by-step derivation

   1. *-rgt-identity 58.5%

      \[\leadsto \cos im \cdot re + \color{blue}{\cos im \cdot 1} \]

   2. distribute-lft-in 58.5%

      \[\leadsto \color{blue}{\cos im \cdot \left(re + 1\right)} \]

4. Simplified 58.5%

   \[\leadsto \color{blue}{\cos im \cdot \left(re + 1\right)} \]

5. Taylor expanded in im around 0 36.4%

   \[\leadsto \color{blue}{1 + \left(re + -0.5 \cdot \left(\left(1 + re\right) \cdot {im}^{2}\right)\right)} \]
6. Step-by-step derivation

   1. +-commutative 36.4%

      \[\leadsto 1 + \color{blue}{\left(-0.5 \cdot \left(\left(1 + re\right) \cdot {im}^{2}\right) + re\right)} \]

   2. fma-def 36.4%

      \[\leadsto 1 + \color{blue}{\mathsf{fma}\left(-0.5, \left(1 + re\right) \cdot {im}^{2}, re\right)} \]

   3. +-commutative 36.4%

      \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{\left(re + 1\right)} \cdot {im}^{2}, re\right) \]

   4. *-commutative 36.4%

      \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{{im}^{2} \cdot \left(re + 1\right)}, re\right) \]

   5. unpow2 36.4%

      \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{\left(im \cdot im\right)} \cdot \left(re + 1\right), re\right) \]

   6. associate-*l* 36.4%

      \[\leadsto 1 + \mathsf{fma}\left(-0.5, \color{blue}{im \cdot \left(im \cdot \left(re + 1\right)\right)}, re\right) \]

7. Simplified 36.4%

   \[\leadsto \color{blue}{1 + \mathsf{fma}\left(-0.5, im \cdot \left(im \cdot \left(re + 1\right)\right), re\right)} \]

8. Taylor expanded in im around 0 32.9%

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

9. Final simplification 32.9%

   \[\leadsto re + 1 \]

Reproduce

herbie shell --seed 2023194 
(FPCore (re im)
  :name "math.exp on complex, real part"
  :precision binary64
  (* (exp re) (cos im)))