Optimisation.CirclePacking:place from circle-packing-0.1.0.4, G

Percentage Accurate: 100.0% → 100.0%
Time: 4.1s
Alternatives: 6
Speedup: 1.0×

Specification

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

\\
\left(x + y\right) \cdot \left(z + 1\right)
\end{array}

Sampling outcomes in binary64 precision:

Local Percentage Accuracy vs ?

The average percentage accuracy by input value. Horizontal axis shows value of an input variable; the variable is choosen in the title. Vertical axis is accuracy; higher is better. Red represent the original program, while blue represents Herbie's suggestion. These can be toggled with buttons below the plot. The line is an average while dots represent individual samples.

Accuracy vs Speed?

Herbie found 6 alternatives:

AlternativeAccuracySpeedup
The accuracy (vertical axis) and speed (horizontal axis) of each alternatives. Up and to the right is better. The red square shows the initial program, and each blue circle shows an alternative.The line shows the best available speed-accuracy tradeoffs.

Initial Program: 100.0% accurate, 1.0× speedup?

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

\\
\left(x + y\right) \cdot \left(z + 1\right)
\end{array}

Alternative 1: 100.0% accurate, 1.0× speedup?

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

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

    \[\left(x + y\right) \cdot \left(z + 1\right) \]
  2. Add Preprocessing
  3. Final simplification100.0%

    \[\leadsto \left(1 + z\right) \cdot \left(y + x\right) \]
  4. Add Preprocessing

Alternative 2: 47.4% accurate, 0.3× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y + x \leq -5 \cdot 10^{-251}:\\ \;\;\;\;\mathsf{fma}\left(z, x, x\right)\\ \mathbf{elif}\;y + x \leq 10^{+54}:\\ \;\;\;\;y + x\\ \mathbf{elif}\;y + x \leq 2 \cdot 10^{+122}:\\ \;\;\;\;z \cdot y\\ \mathbf{elif}\;y + x \leq 5 \cdot 10^{+258}:\\ \;\;\;\;y + x\\ \mathbf{else}:\\ \;\;\;\;z \cdot y\\ \end{array} \end{array} \]
(FPCore (x y z)
 :precision binary64
 (if (<= (+ y x) -5e-251)
   (fma z x x)
   (if (<= (+ y x) 1e+54)
     (+ y x)
     (if (<= (+ y x) 2e+122)
       (* z y)
       (if (<= (+ y x) 5e+258) (+ y x) (* z y))))))
double code(double x, double y, double z) {
	double tmp;
	if ((y + x) <= -5e-251) {
		tmp = fma(z, x, x);
	} else if ((y + x) <= 1e+54) {
		tmp = y + x;
	} else if ((y + x) <= 2e+122) {
		tmp = z * y;
	} else if ((y + x) <= 5e+258) {
		tmp = y + x;
	} else {
		tmp = z * y;
	}
	return tmp;
}
function code(x, y, z)
	tmp = 0.0
	if (Float64(y + x) <= -5e-251)
		tmp = fma(z, x, x);
	elseif (Float64(y + x) <= 1e+54)
		tmp = Float64(y + x);
	elseif (Float64(y + x) <= 2e+122)
		tmp = Float64(z * y);
	elseif (Float64(y + x) <= 5e+258)
		tmp = Float64(y + x);
	else
		tmp = Float64(z * y);
	end
	return tmp
end
code[x_, y_, z_] := If[LessEqual[N[(y + x), $MachinePrecision], -5e-251], N[(z * x + x), $MachinePrecision], If[LessEqual[N[(y + x), $MachinePrecision], 1e+54], N[(y + x), $MachinePrecision], If[LessEqual[N[(y + x), $MachinePrecision], 2e+122], N[(z * y), $MachinePrecision], If[LessEqual[N[(y + x), $MachinePrecision], 5e+258], N[(y + x), $MachinePrecision], N[(z * y), $MachinePrecision]]]]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;y + x \leq -5 \cdot 10^{-251}:\\
\;\;\;\;\mathsf{fma}\left(z, x, x\right)\\

\mathbf{elif}\;y + x \leq 10^{+54}:\\
\;\;\;\;y + x\\

\mathbf{elif}\;y + x \leq 2 \cdot 10^{+122}:\\
\;\;\;\;z \cdot y\\

\mathbf{elif}\;y + x \leq 5 \cdot 10^{+258}:\\
\;\;\;\;y + x\\

\mathbf{else}:\\
\;\;\;\;z \cdot y\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if (+.f64 x y) < -5.0000000000000003e-251

    1. Initial program 100.0%

      \[\left(x + y\right) \cdot \left(z + 1\right) \]
    2. Add Preprocessing
    3. Taylor expanded in y around 0

      \[\leadsto \color{blue}{x \cdot \left(1 + z\right)} \]
    4. Step-by-step derivation
      1. +-commutativeN/A

        \[\leadsto x \cdot \color{blue}{\left(z + 1\right)} \]
      2. distribute-rgt-inN/A

        \[\leadsto \color{blue}{z \cdot x + 1 \cdot x} \]
      3. *-lft-identityN/A

        \[\leadsto z \cdot x + \color{blue}{x} \]
      4. lower-fma.f6451.9

        \[\leadsto \color{blue}{\mathsf{fma}\left(z, x, x\right)} \]
    5. Applied rewrites51.9%

      \[\leadsto \color{blue}{\mathsf{fma}\left(z, x, x\right)} \]

    if -5.0000000000000003e-251 < (+.f64 x y) < 1.0000000000000001e54 or 2.00000000000000003e122 < (+.f64 x y) < 5e258

    1. Initial program 100.0%

      \[\left(x + y\right) \cdot \left(z + 1\right) \]
    2. Add Preprocessing
    3. Taylor expanded in z around 0

      \[\leadsto \color{blue}{x + y} \]
    4. Step-by-step derivation
      1. +-commutativeN/A

        \[\leadsto \color{blue}{y + x} \]
      2. lower-+.f6465.0

        \[\leadsto \color{blue}{y + x} \]
    5. Applied rewrites65.0%

      \[\leadsto \color{blue}{y + x} \]

    if 1.0000000000000001e54 < (+.f64 x y) < 2.00000000000000003e122 or 5e258 < (+.f64 x y)

    1. Initial program 100.0%

      \[\left(x + y\right) \cdot \left(z + 1\right) \]
    2. Add Preprocessing
    3. Taylor expanded in y around inf

      \[\leadsto \color{blue}{y \cdot \left(1 + z\right)} \]
    4. Step-by-step derivation
      1. +-commutativeN/A

        \[\leadsto y \cdot \color{blue}{\left(z + 1\right)} \]
      2. distribute-rgt-inN/A

        \[\leadsto \color{blue}{z \cdot y + 1 \cdot y} \]
      3. *-lft-identityN/A

        \[\leadsto z \cdot y + \color{blue}{y} \]
      4. lower-fma.f6455.5

        \[\leadsto \color{blue}{\mathsf{fma}\left(z, y, y\right)} \]
    5. Applied rewrites55.5%

      \[\leadsto \color{blue}{\mathsf{fma}\left(z, y, y\right)} \]
    6. Taylor expanded in z around inf

      \[\leadsto y \cdot \color{blue}{z} \]
    7. Step-by-step derivation
      1. Applied rewrites45.4%

        \[\leadsto z \cdot \color{blue}{y} \]
    8. Recombined 3 regimes into one program.
    9. Final simplification54.9%

      \[\leadsto \begin{array}{l} \mathbf{if}\;y + x \leq -5 \cdot 10^{-251}:\\ \;\;\;\;\mathsf{fma}\left(z, x, x\right)\\ \mathbf{elif}\;y + x \leq 10^{+54}:\\ \;\;\;\;y + x\\ \mathbf{elif}\;y + x \leq 2 \cdot 10^{+122}:\\ \;\;\;\;z \cdot y\\ \mathbf{elif}\;y + x \leq 5 \cdot 10^{+258}:\\ \;\;\;\;y + x\\ \mathbf{else}:\\ \;\;\;\;z \cdot y\\ \end{array} \]
    10. Add Preprocessing

    Alternative 3: 74.9% accurate, 0.4× speedup?

    \[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;1 + z \leq -1 \cdot 10^{+128}:\\ \;\;\;\;z \cdot x\\ \mathbf{elif}\;1 + z \leq -500000000:\\ \;\;\;\;z \cdot y\\ \mathbf{elif}\;1 + z \leq 200000000:\\ \;\;\;\;y + x\\ \mathbf{else}:\\ \;\;\;\;z \cdot x\\ \end{array} \end{array} \]
    (FPCore (x y z)
     :precision binary64
     (if (<= (+ 1.0 z) -1e+128)
       (* z x)
       (if (<= (+ 1.0 z) -500000000.0)
         (* z y)
         (if (<= (+ 1.0 z) 200000000.0) (+ y x) (* z x)))))
    double code(double x, double y, double z) {
    	double tmp;
    	if ((1.0 + z) <= -1e+128) {
    		tmp = z * x;
    	} else if ((1.0 + z) <= -500000000.0) {
    		tmp = z * y;
    	} else if ((1.0 + z) <= 200000000.0) {
    		tmp = y + x;
    	} else {
    		tmp = z * x;
    	}
    	return tmp;
    }
    
    real(8) function code(x, y, z)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        real(8), intent (in) :: z
        real(8) :: tmp
        if ((1.0d0 + z) <= (-1d+128)) then
            tmp = z * x
        else if ((1.0d0 + z) <= (-500000000.0d0)) then
            tmp = z * y
        else if ((1.0d0 + z) <= 200000000.0d0) then
            tmp = y + x
        else
            tmp = z * x
        end if
        code = tmp
    end function
    
    public static double code(double x, double y, double z) {
    	double tmp;
    	if ((1.0 + z) <= -1e+128) {
    		tmp = z * x;
    	} else if ((1.0 + z) <= -500000000.0) {
    		tmp = z * y;
    	} else if ((1.0 + z) <= 200000000.0) {
    		tmp = y + x;
    	} else {
    		tmp = z * x;
    	}
    	return tmp;
    }
    
    def code(x, y, z):
    	tmp = 0
    	if (1.0 + z) <= -1e+128:
    		tmp = z * x
    	elif (1.0 + z) <= -500000000.0:
    		tmp = z * y
    	elif (1.0 + z) <= 200000000.0:
    		tmp = y + x
    	else:
    		tmp = z * x
    	return tmp
    
    function code(x, y, z)
    	tmp = 0.0
    	if (Float64(1.0 + z) <= -1e+128)
    		tmp = Float64(z * x);
    	elseif (Float64(1.0 + z) <= -500000000.0)
    		tmp = Float64(z * y);
    	elseif (Float64(1.0 + z) <= 200000000.0)
    		tmp = Float64(y + x);
    	else
    		tmp = Float64(z * x);
    	end
    	return tmp
    end
    
    function tmp_2 = code(x, y, z)
    	tmp = 0.0;
    	if ((1.0 + z) <= -1e+128)
    		tmp = z * x;
    	elseif ((1.0 + z) <= -500000000.0)
    		tmp = z * y;
    	elseif ((1.0 + z) <= 200000000.0)
    		tmp = y + x;
    	else
    		tmp = z * x;
    	end
    	tmp_2 = tmp;
    end
    
    code[x_, y_, z_] := If[LessEqual[N[(1.0 + z), $MachinePrecision], -1e+128], N[(z * x), $MachinePrecision], If[LessEqual[N[(1.0 + z), $MachinePrecision], -500000000.0], N[(z * y), $MachinePrecision], If[LessEqual[N[(1.0 + z), $MachinePrecision], 200000000.0], N[(y + x), $MachinePrecision], N[(z * x), $MachinePrecision]]]]
    
    \begin{array}{l}
    
    \\
    \begin{array}{l}
    \mathbf{if}\;1 + z \leq -1 \cdot 10^{+128}:\\
    \;\;\;\;z \cdot x\\
    
    \mathbf{elif}\;1 + z \leq -500000000:\\
    \;\;\;\;z \cdot y\\
    
    \mathbf{elif}\;1 + z \leq 200000000:\\
    \;\;\;\;y + x\\
    
    \mathbf{else}:\\
    \;\;\;\;z \cdot x\\
    
    
    \end{array}
    \end{array}
    
    Derivation
    1. Split input into 3 regimes
    2. if (+.f64 z #s(literal 1 binary64)) < -1.0000000000000001e128 or 2e8 < (+.f64 z #s(literal 1 binary64))

      1. Initial program 100.0%

        \[\left(x + y\right) \cdot \left(z + 1\right) \]
      2. Add Preprocessing
      3. Taylor expanded in y around 0

        \[\leadsto \color{blue}{x \cdot \left(1 + z\right)} \]
      4. Step-by-step derivation
        1. +-commutativeN/A

          \[\leadsto x \cdot \color{blue}{\left(z + 1\right)} \]
        2. distribute-rgt-inN/A

          \[\leadsto \color{blue}{z \cdot x + 1 \cdot x} \]
        3. *-lft-identityN/A

          \[\leadsto z \cdot x + \color{blue}{x} \]
        4. lower-fma.f6455.9

          \[\leadsto \color{blue}{\mathsf{fma}\left(z, x, x\right)} \]
      5. Applied rewrites55.9%

        \[\leadsto \color{blue}{\mathsf{fma}\left(z, x, x\right)} \]
      6. Taylor expanded in z around inf

        \[\leadsto x \cdot \color{blue}{z} \]
      7. Step-by-step derivation
        1. Applied rewrites55.3%

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

        if -1.0000000000000001e128 < (+.f64 z #s(literal 1 binary64)) < -5e8

        1. Initial program 100.0%

          \[\left(x + y\right) \cdot \left(z + 1\right) \]
        2. Add Preprocessing
        3. Taylor expanded in y around inf

          \[\leadsto \color{blue}{y \cdot \left(1 + z\right)} \]
        4. Step-by-step derivation
          1. +-commutativeN/A

            \[\leadsto y \cdot \color{blue}{\left(z + 1\right)} \]
          2. distribute-rgt-inN/A

            \[\leadsto \color{blue}{z \cdot y + 1 \cdot y} \]
          3. *-lft-identityN/A

            \[\leadsto z \cdot y + \color{blue}{y} \]
          4. lower-fma.f6455.4

            \[\leadsto \color{blue}{\mathsf{fma}\left(z, y, y\right)} \]
        5. Applied rewrites55.4%

          \[\leadsto \color{blue}{\mathsf{fma}\left(z, y, y\right)} \]
        6. Taylor expanded in z around inf

          \[\leadsto y \cdot \color{blue}{z} \]
        7. Step-by-step derivation
          1. Applied rewrites54.0%

            \[\leadsto z \cdot \color{blue}{y} \]

          if -5e8 < (+.f64 z #s(literal 1 binary64)) < 2e8

          1. Initial program 100.0%

            \[\left(x + y\right) \cdot \left(z + 1\right) \]
          2. Add Preprocessing
          3. Taylor expanded in z around 0

            \[\leadsto \color{blue}{x + y} \]
          4. Step-by-step derivation
            1. +-commutativeN/A

              \[\leadsto \color{blue}{y + x} \]
            2. lower-+.f6497.4

              \[\leadsto \color{blue}{y + x} \]
          5. Applied rewrites97.4%

            \[\leadsto \color{blue}{y + x} \]
        8. Recombined 3 regimes into one program.
        9. Final simplification76.4%

          \[\leadsto \begin{array}{l} \mathbf{if}\;1 + z \leq -1 \cdot 10^{+128}:\\ \;\;\;\;z \cdot x\\ \mathbf{elif}\;1 + z \leq -500000000:\\ \;\;\;\;z \cdot y\\ \mathbf{elif}\;1 + z \leq 200000000:\\ \;\;\;\;y + x\\ \mathbf{else}:\\ \;\;\;\;z \cdot x\\ \end{array} \]
        10. Add Preprocessing

        Alternative 4: 74.6% accurate, 0.5× speedup?

        \[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;1 + z \leq -500000000:\\ \;\;\;\;z \cdot x\\ \mathbf{elif}\;1 + z \leq 200000000:\\ \;\;\;\;y + x\\ \mathbf{else}:\\ \;\;\;\;z \cdot x\\ \end{array} \end{array} \]
        (FPCore (x y z)
         :precision binary64
         (if (<= (+ 1.0 z) -500000000.0)
           (* z x)
           (if (<= (+ 1.0 z) 200000000.0) (+ y x) (* z x))))
        double code(double x, double y, double z) {
        	double tmp;
        	if ((1.0 + z) <= -500000000.0) {
        		tmp = z * x;
        	} else if ((1.0 + z) <= 200000000.0) {
        		tmp = y + x;
        	} else {
        		tmp = z * x;
        	}
        	return tmp;
        }
        
        real(8) function code(x, y, z)
            real(8), intent (in) :: x
            real(8), intent (in) :: y
            real(8), intent (in) :: z
            real(8) :: tmp
            if ((1.0d0 + z) <= (-500000000.0d0)) then
                tmp = z * x
            else if ((1.0d0 + z) <= 200000000.0d0) then
                tmp = y + x
            else
                tmp = z * x
            end if
            code = tmp
        end function
        
        public static double code(double x, double y, double z) {
        	double tmp;
        	if ((1.0 + z) <= -500000000.0) {
        		tmp = z * x;
        	} else if ((1.0 + z) <= 200000000.0) {
        		tmp = y + x;
        	} else {
        		tmp = z * x;
        	}
        	return tmp;
        }
        
        def code(x, y, z):
        	tmp = 0
        	if (1.0 + z) <= -500000000.0:
        		tmp = z * x
        	elif (1.0 + z) <= 200000000.0:
        		tmp = y + x
        	else:
        		tmp = z * x
        	return tmp
        
        function code(x, y, z)
        	tmp = 0.0
        	if (Float64(1.0 + z) <= -500000000.0)
        		tmp = Float64(z * x);
        	elseif (Float64(1.0 + z) <= 200000000.0)
        		tmp = Float64(y + x);
        	else
        		tmp = Float64(z * x);
        	end
        	return tmp
        end
        
        function tmp_2 = code(x, y, z)
        	tmp = 0.0;
        	if ((1.0 + z) <= -500000000.0)
        		tmp = z * x;
        	elseif ((1.0 + z) <= 200000000.0)
        		tmp = y + x;
        	else
        		tmp = z * x;
        	end
        	tmp_2 = tmp;
        end
        
        code[x_, y_, z_] := If[LessEqual[N[(1.0 + z), $MachinePrecision], -500000000.0], N[(z * x), $MachinePrecision], If[LessEqual[N[(1.0 + z), $MachinePrecision], 200000000.0], N[(y + x), $MachinePrecision], N[(z * x), $MachinePrecision]]]
        
        \begin{array}{l}
        
        \\
        \begin{array}{l}
        \mathbf{if}\;1 + z \leq -500000000:\\
        \;\;\;\;z \cdot x\\
        
        \mathbf{elif}\;1 + z \leq 200000000:\\
        \;\;\;\;y + x\\
        
        \mathbf{else}:\\
        \;\;\;\;z \cdot x\\
        
        
        \end{array}
        \end{array}
        
        Derivation
        1. Split input into 2 regimes
        2. if (+.f64 z #s(literal 1 binary64)) < -5e8 or 2e8 < (+.f64 z #s(literal 1 binary64))

          1. Initial program 100.0%

            \[\left(x + y\right) \cdot \left(z + 1\right) \]
          2. Add Preprocessing
          3. Taylor expanded in y around 0

            \[\leadsto \color{blue}{x \cdot \left(1 + z\right)} \]
          4. Step-by-step derivation
            1. +-commutativeN/A

              \[\leadsto x \cdot \color{blue}{\left(z + 1\right)} \]
            2. distribute-rgt-inN/A

              \[\leadsto \color{blue}{z \cdot x + 1 \cdot x} \]
            3. *-lft-identityN/A

              \[\leadsto z \cdot x + \color{blue}{x} \]
            4. lower-fma.f6454.5

              \[\leadsto \color{blue}{\mathsf{fma}\left(z, x, x\right)} \]
          5. Applied rewrites54.5%

            \[\leadsto \color{blue}{\mathsf{fma}\left(z, x, x\right)} \]
          6. Taylor expanded in z around inf

            \[\leadsto x \cdot \color{blue}{z} \]
          7. Step-by-step derivation
            1. Applied rewrites53.9%

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

            if -5e8 < (+.f64 z #s(literal 1 binary64)) < 2e8

            1. Initial program 100.0%

              \[\left(x + y\right) \cdot \left(z + 1\right) \]
            2. Add Preprocessing
            3. Taylor expanded in z around 0

              \[\leadsto \color{blue}{x + y} \]
            4. Step-by-step derivation
              1. +-commutativeN/A

                \[\leadsto \color{blue}{y + x} \]
              2. lower-+.f6497.4

                \[\leadsto \color{blue}{y + x} \]
            5. Applied rewrites97.4%

              \[\leadsto \color{blue}{y + x} \]
          8. Recombined 2 regimes into one program.
          9. Final simplification75.8%

            \[\leadsto \begin{array}{l} \mathbf{if}\;1 + z \leq -500000000:\\ \;\;\;\;z \cdot x\\ \mathbf{elif}\;1 + z \leq 200000000:\\ \;\;\;\;y + x\\ \mathbf{else}:\\ \;\;\;\;z \cdot x\\ \end{array} \]
          10. Add Preprocessing

          Alternative 5: 50.8% accurate, 0.7× speedup?

          \[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y + x \leq -5 \cdot 10^{-251}:\\ \;\;\;\;\mathsf{fma}\left(z, x, x\right)\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(z, y, y\right)\\ \end{array} \end{array} \]
          (FPCore (x y z)
           :precision binary64
           (if (<= (+ y x) -5e-251) (fma z x x) (fma z y y)))
          double code(double x, double y, double z) {
          	double tmp;
          	if ((y + x) <= -5e-251) {
          		tmp = fma(z, x, x);
          	} else {
          		tmp = fma(z, y, y);
          	}
          	return tmp;
          }
          
          function code(x, y, z)
          	tmp = 0.0
          	if (Float64(y + x) <= -5e-251)
          		tmp = fma(z, x, x);
          	else
          		tmp = fma(z, y, y);
          	end
          	return tmp
          end
          
          code[x_, y_, z_] := If[LessEqual[N[(y + x), $MachinePrecision], -5e-251], N[(z * x + x), $MachinePrecision], N[(z * y + y), $MachinePrecision]]
          
          \begin{array}{l}
          
          \\
          \begin{array}{l}
          \mathbf{if}\;y + x \leq -5 \cdot 10^{-251}:\\
          \;\;\;\;\mathsf{fma}\left(z, x, x\right)\\
          
          \mathbf{else}:\\
          \;\;\;\;\mathsf{fma}\left(z, y, y\right)\\
          
          
          \end{array}
          \end{array}
          
          Derivation
          1. Split input into 2 regimes
          2. if (+.f64 x y) < -5.0000000000000003e-251

            1. Initial program 100.0%

              \[\left(x + y\right) \cdot \left(z + 1\right) \]
            2. Add Preprocessing
            3. Taylor expanded in y around 0

              \[\leadsto \color{blue}{x \cdot \left(1 + z\right)} \]
            4. Step-by-step derivation
              1. +-commutativeN/A

                \[\leadsto x \cdot \color{blue}{\left(z + 1\right)} \]
              2. distribute-rgt-inN/A

                \[\leadsto \color{blue}{z \cdot x + 1 \cdot x} \]
              3. *-lft-identityN/A

                \[\leadsto z \cdot x + \color{blue}{x} \]
              4. lower-fma.f6451.9

                \[\leadsto \color{blue}{\mathsf{fma}\left(z, x, x\right)} \]
            5. Applied rewrites51.9%

              \[\leadsto \color{blue}{\mathsf{fma}\left(z, x, x\right)} \]

            if -5.0000000000000003e-251 < (+.f64 x y)

            1. Initial program 100.0%

              \[\left(x + y\right) \cdot \left(z + 1\right) \]
            2. Add Preprocessing
            3. Taylor expanded in y around inf

              \[\leadsto \color{blue}{y \cdot \left(1 + z\right)} \]
            4. Step-by-step derivation
              1. +-commutativeN/A

                \[\leadsto y \cdot \color{blue}{\left(z + 1\right)} \]
              2. distribute-rgt-inN/A

                \[\leadsto \color{blue}{z \cdot y + 1 \cdot y} \]
              3. *-lft-identityN/A

                \[\leadsto z \cdot y + \color{blue}{y} \]
              4. lower-fma.f6449.9

                \[\leadsto \color{blue}{\mathsf{fma}\left(z, y, y\right)} \]
            5. Applied rewrites49.9%

              \[\leadsto \color{blue}{\mathsf{fma}\left(z, y, y\right)} \]
          3. Recombined 2 regimes into one program.
          4. Final simplification50.9%

            \[\leadsto \begin{array}{l} \mathbf{if}\;y + x \leq -5 \cdot 10^{-251}:\\ \;\;\;\;\mathsf{fma}\left(z, x, x\right)\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(z, y, y\right)\\ \end{array} \]
          5. Add Preprocessing

          Alternative 6: 51.3% accurate, 3.0× speedup?

          \[\begin{array}{l} \\ y + x \end{array} \]
          (FPCore (x y z) :precision binary64 (+ y x))
          double code(double x, double y, double z) {
          	return y + x;
          }
          
          real(8) function code(x, y, z)
              real(8), intent (in) :: x
              real(8), intent (in) :: y
              real(8), intent (in) :: z
              code = y + x
          end function
          
          public static double code(double x, double y, double z) {
          	return y + x;
          }
          
          def code(x, y, z):
          	return y + x
          
          function code(x, y, z)
          	return Float64(y + x)
          end
          
          function tmp = code(x, y, z)
          	tmp = y + x;
          end
          
          code[x_, y_, z_] := N[(y + x), $MachinePrecision]
          
          \begin{array}{l}
          
          \\
          y + x
          \end{array}
          
          Derivation
          1. Initial program 100.0%

            \[\left(x + y\right) \cdot \left(z + 1\right) \]
          2. Add Preprocessing
          3. Taylor expanded in z around 0

            \[\leadsto \color{blue}{x + y} \]
          4. Step-by-step derivation
            1. +-commutativeN/A

              \[\leadsto \color{blue}{y + x} \]
            2. lower-+.f6450.9

              \[\leadsto \color{blue}{y + x} \]
          5. Applied rewrites50.9%

            \[\leadsto \color{blue}{y + x} \]
          6. Add Preprocessing

          Reproduce

          ?
          herbie shell --seed 2024244 
          (FPCore (x y z)
            :name "Optimisation.CirclePacking:place from circle-packing-0.1.0.4, G"
            :precision binary64
            (* (+ x y) (+ z 1.0)))