FastMath dist3

Percentage Accurate: 98.1% → 100.0%
Time: 3.0s
Alternatives: 6
Speedup: 1.9×

Specification

?
\[\begin{array}{l} \\ \left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32 \end{array} \]
(FPCore (d1 d2 d3)
 :precision binary64
 (+ (+ (* d1 d2) (* (+ d3 5.0) d1)) (* d1 32.0)))
double code(double d1, double d2, double d3) {
	return ((d1 * d2) + ((d3 + 5.0) * d1)) + (d1 * 32.0);
}
real(8) function code(d1, d2, d3)
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    code = ((d1 * d2) + ((d3 + 5.0d0) * d1)) + (d1 * 32.0d0)
end function
public static double code(double d1, double d2, double d3) {
	return ((d1 * d2) + ((d3 + 5.0) * d1)) + (d1 * 32.0);
}
def code(d1, d2, d3):
	return ((d1 * d2) + ((d3 + 5.0) * d1)) + (d1 * 32.0)
function code(d1, d2, d3)
	return Float64(Float64(Float64(d1 * d2) + Float64(Float64(d3 + 5.0) * d1)) + Float64(d1 * 32.0))
end
function tmp = code(d1, d2, d3)
	tmp = ((d1 * d2) + ((d3 + 5.0) * d1)) + (d1 * 32.0);
end
code[d1_, d2_, d3_] := N[(N[(N[(d1 * d2), $MachinePrecision] + N[(N[(d3 + 5.0), $MachinePrecision] * d1), $MachinePrecision]), $MachinePrecision] + N[(d1 * 32.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
\left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32
\end{array}

Sampling outcomes in binary64 precision:

Local Percentage Accuracy vs ?

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

Accuracy vs Speed?

Herbie found 6 alternatives:

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

Initial Program: 98.1% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32 \end{array} \]
(FPCore (d1 d2 d3)
 :precision binary64
 (+ (+ (* d1 d2) (* (+ d3 5.0) d1)) (* d1 32.0)))
double code(double d1, double d2, double d3) {
	return ((d1 * d2) + ((d3 + 5.0) * d1)) + (d1 * 32.0);
}
real(8) function code(d1, d2, d3)
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    code = ((d1 * d2) + ((d3 + 5.0d0) * d1)) + (d1 * 32.0d0)
end function
public static double code(double d1, double d2, double d3) {
	return ((d1 * d2) + ((d3 + 5.0) * d1)) + (d1 * 32.0);
}
def code(d1, d2, d3):
	return ((d1 * d2) + ((d3 + 5.0) * d1)) + (d1 * 32.0)
function code(d1, d2, d3)
	return Float64(Float64(Float64(d1 * d2) + Float64(Float64(d3 + 5.0) * d1)) + Float64(d1 * 32.0))
end
function tmp = code(d1, d2, d3)
	tmp = ((d1 * d2) + ((d3 + 5.0) * d1)) + (d1 * 32.0);
end
code[d1_, d2_, d3_] := N[(N[(N[(d1 * d2), $MachinePrecision] + N[(N[(d3 + 5.0), $MachinePrecision] * d1), $MachinePrecision]), $MachinePrecision] + N[(d1 * 32.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
\left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32
\end{array}

Alternative 1: 100.0% accurate, 1.9× speedup?

\[\begin{array}{l} \\ d1 \cdot \left(d2 + \left(d3 + 37\right)\right) \end{array} \]
(FPCore (d1 d2 d3) :precision binary64 (* d1 (+ d2 (+ d3 37.0))))
double code(double d1, double d2, double d3) {
	return d1 * (d2 + (d3 + 37.0));
}
real(8) function code(d1, d2, d3)
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    code = d1 * (d2 + (d3 + 37.0d0))
end function
public static double code(double d1, double d2, double d3) {
	return d1 * (d2 + (d3 + 37.0));
}
def code(d1, d2, d3):
	return d1 * (d2 + (d3 + 37.0))
function code(d1, d2, d3)
	return Float64(d1 * Float64(d2 + Float64(d3 + 37.0)))
end
function tmp = code(d1, d2, d3)
	tmp = d1 * (d2 + (d3 + 37.0));
end
code[d1_, d2_, d3_] := N[(d1 * N[(d2 + N[(d3 + 37.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
d1 \cdot \left(d2 + \left(d3 + 37\right)\right)
\end{array}
Derivation
  1. Initial program 96.8%

    \[\left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32 \]
  2. Step-by-step derivation
    1. *-commutative96.8%

      \[\leadsto \left(d1 \cdot d2 + \color{blue}{d1 \cdot \left(d3 + 5\right)}\right) + d1 \cdot 32 \]
    2. distribute-lft-out100.0%

      \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 5\right)\right)} + d1 \cdot 32 \]
    3. distribute-lft-out100.0%

      \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + \left(d3 + 5\right)\right) + 32\right)} \]
    4. associate-+r+100.0%

      \[\leadsto d1 \cdot \color{blue}{\left(d2 + \left(\left(d3 + 5\right) + 32\right)\right)} \]
    5. associate-+l+100.0%

      \[\leadsto d1 \cdot \left(d2 + \color{blue}{\left(d3 + \left(5 + 32\right)\right)}\right) \]
    6. metadata-eval100.0%

      \[\leadsto d1 \cdot \left(d2 + \left(d3 + \color{blue}{37}\right)\right) \]
  3. Simplified100.0%

    \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 37\right)\right)} \]
  4. Final simplification100.0%

    \[\leadsto d1 \cdot \left(d2 + \left(d3 + 37\right)\right) \]

Alternative 2: 50.9% accurate, 1.8× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;d2 \leq -38:\\ \;\;\;\;d1 \cdot d2\\ \mathbf{elif}\;d2 \leq 1.35 \cdot 10^{-300}:\\ \;\;\;\;d1 \cdot 37\\ \mathbf{else}:\\ \;\;\;\;d1 \cdot d3\\ \end{array} \end{array} \]
(FPCore (d1 d2 d3)
 :precision binary64
 (if (<= d2 -38.0) (* d1 d2) (if (<= d2 1.35e-300) (* d1 37.0) (* d1 d3))))
double code(double d1, double d2, double d3) {
	double tmp;
	if (d2 <= -38.0) {
		tmp = d1 * d2;
	} else if (d2 <= 1.35e-300) {
		tmp = d1 * 37.0;
	} else {
		tmp = d1 * d3;
	}
	return tmp;
}
real(8) function code(d1, d2, d3)
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8) :: tmp
    if (d2 <= (-38.0d0)) then
        tmp = d1 * d2
    else if (d2 <= 1.35d-300) then
        tmp = d1 * 37.0d0
    else
        tmp = d1 * d3
    end if
    code = tmp
end function
public static double code(double d1, double d2, double d3) {
	double tmp;
	if (d2 <= -38.0) {
		tmp = d1 * d2;
	} else if (d2 <= 1.35e-300) {
		tmp = d1 * 37.0;
	} else {
		tmp = d1 * d3;
	}
	return tmp;
}
def code(d1, d2, d3):
	tmp = 0
	if d2 <= -38.0:
		tmp = d1 * d2
	elif d2 <= 1.35e-300:
		tmp = d1 * 37.0
	else:
		tmp = d1 * d3
	return tmp
function code(d1, d2, d3)
	tmp = 0.0
	if (d2 <= -38.0)
		tmp = Float64(d1 * d2);
	elseif (d2 <= 1.35e-300)
		tmp = Float64(d1 * 37.0);
	else
		tmp = Float64(d1 * d3);
	end
	return tmp
end
function tmp_2 = code(d1, d2, d3)
	tmp = 0.0;
	if (d2 <= -38.0)
		tmp = d1 * d2;
	elseif (d2 <= 1.35e-300)
		tmp = d1 * 37.0;
	else
		tmp = d1 * d3;
	end
	tmp_2 = tmp;
end
code[d1_, d2_, d3_] := If[LessEqual[d2, -38.0], N[(d1 * d2), $MachinePrecision], If[LessEqual[d2, 1.35e-300], N[(d1 * 37.0), $MachinePrecision], N[(d1 * d3), $MachinePrecision]]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;d2 \leq -38:\\
\;\;\;\;d1 \cdot d2\\

\mathbf{elif}\;d2 \leq 1.35 \cdot 10^{-300}:\\
\;\;\;\;d1 \cdot 37\\

\mathbf{else}:\\
\;\;\;\;d1 \cdot d3\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if d2 < -38

    1. Initial program 95.7%

      \[\left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32 \]
    2. Step-by-step derivation
      1. *-commutative95.7%

        \[\leadsto \left(d1 \cdot d2 + \color{blue}{d1 \cdot \left(d3 + 5\right)}\right) + d1 \cdot 32 \]
      2. distribute-lft-out100.0%

        \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 5\right)\right)} + d1 \cdot 32 \]
      3. distribute-lft-out100.0%

        \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + \left(d3 + 5\right)\right) + 32\right)} \]
      4. associate-+r+100.0%

        \[\leadsto d1 \cdot \color{blue}{\left(d2 + \left(\left(d3 + 5\right) + 32\right)\right)} \]
      5. associate-+l+100.0%

        \[\leadsto d1 \cdot \left(d2 + \color{blue}{\left(d3 + \left(5 + 32\right)\right)}\right) \]
      6. metadata-eval100.0%

        \[\leadsto d1 \cdot \left(d2 + \left(d3 + \color{blue}{37}\right)\right) \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 37\right)\right)} \]
    4. Taylor expanded in d2 around inf 71.2%

      \[\leadsto \color{blue}{d2 \cdot d1} \]

    if -38 < d2 < 1.34999999999999998e-300

    1. Initial program 99.9%

      \[\left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32 \]
    2. Step-by-step derivation
      1. *-commutative99.9%

        \[\leadsto \left(d1 \cdot d2 + \color{blue}{d1 \cdot \left(d3 + 5\right)}\right) + d1 \cdot 32 \]
      2. distribute-lft-out99.9%

        \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 5\right)\right)} + d1 \cdot 32 \]
      3. distribute-lft-out100.0%

        \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + \left(d3 + 5\right)\right) + 32\right)} \]
      4. associate-+r+100.0%

        \[\leadsto d1 \cdot \color{blue}{\left(d2 + \left(\left(d3 + 5\right) + 32\right)\right)} \]
      5. associate-+l+100.0%

        \[\leadsto d1 \cdot \left(d2 + \color{blue}{\left(d3 + \left(5 + 32\right)\right)}\right) \]
      6. metadata-eval100.0%

        \[\leadsto d1 \cdot \left(d2 + \left(d3 + \color{blue}{37}\right)\right) \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 37\right)\right)} \]
    4. Taylor expanded in d2 around 0 99.2%

      \[\leadsto \color{blue}{\left(37 + d3\right) \cdot d1} \]
    5. Taylor expanded in d3 around 0 59.6%

      \[\leadsto \color{blue}{37 \cdot d1} \]

    if 1.34999999999999998e-300 < d2

    1. Initial program 95.8%

      \[\left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32 \]
    2. Step-by-step derivation
      1. *-commutative95.8%

        \[\leadsto \left(d1 \cdot d2 + \color{blue}{d1 \cdot \left(d3 + 5\right)}\right) + d1 \cdot 32 \]
      2. distribute-lft-out99.9%

        \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 5\right)\right)} + d1 \cdot 32 \]
      3. distribute-lft-out100.0%

        \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + \left(d3 + 5\right)\right) + 32\right)} \]
      4. associate-+r+100.0%

        \[\leadsto d1 \cdot \color{blue}{\left(d2 + \left(\left(d3 + 5\right) + 32\right)\right)} \]
      5. associate-+l+100.0%

        \[\leadsto d1 \cdot \left(d2 + \color{blue}{\left(d3 + \left(5 + 32\right)\right)}\right) \]
      6. metadata-eval100.0%

        \[\leadsto d1 \cdot \left(d2 + \left(d3 + \color{blue}{37}\right)\right) \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 37\right)\right)} \]
    4. Taylor expanded in d3 around inf 43.0%

      \[\leadsto \color{blue}{d1 \cdot d3} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification54.8%

    \[\leadsto \begin{array}{l} \mathbf{if}\;d2 \leq -38:\\ \;\;\;\;d1 \cdot d2\\ \mathbf{elif}\;d2 \leq 1.35 \cdot 10^{-300}:\\ \;\;\;\;d1 \cdot 37\\ \mathbf{else}:\\ \;\;\;\;d1 \cdot d3\\ \end{array} \]

Alternative 3: 75.6% accurate, 1.8× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;d3 \leq 2.5 \cdot 10^{+18}:\\ \;\;\;\;d1 \cdot \left(d2 + 37\right)\\ \mathbf{else}:\\ \;\;\;\;d1 \cdot d3\\ \end{array} \end{array} \]
(FPCore (d1 d2 d3)
 :precision binary64
 (if (<= d3 2.5e+18) (* d1 (+ d2 37.0)) (* d1 d3)))
double code(double d1, double d2, double d3) {
	double tmp;
	if (d3 <= 2.5e+18) {
		tmp = d1 * (d2 + 37.0);
	} else {
		tmp = d1 * d3;
	}
	return tmp;
}
real(8) function code(d1, d2, d3)
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8) :: tmp
    if (d3 <= 2.5d+18) then
        tmp = d1 * (d2 + 37.0d0)
    else
        tmp = d1 * d3
    end if
    code = tmp
end function
public static double code(double d1, double d2, double d3) {
	double tmp;
	if (d3 <= 2.5e+18) {
		tmp = d1 * (d2 + 37.0);
	} else {
		tmp = d1 * d3;
	}
	return tmp;
}
def code(d1, d2, d3):
	tmp = 0
	if d3 <= 2.5e+18:
		tmp = d1 * (d2 + 37.0)
	else:
		tmp = d1 * d3
	return tmp
function code(d1, d2, d3)
	tmp = 0.0
	if (d3 <= 2.5e+18)
		tmp = Float64(d1 * Float64(d2 + 37.0));
	else
		tmp = Float64(d1 * d3);
	end
	return tmp
end
function tmp_2 = code(d1, d2, d3)
	tmp = 0.0;
	if (d3 <= 2.5e+18)
		tmp = d1 * (d2 + 37.0);
	else
		tmp = d1 * d3;
	end
	tmp_2 = tmp;
end
code[d1_, d2_, d3_] := If[LessEqual[d3, 2.5e+18], N[(d1 * N[(d2 + 37.0), $MachinePrecision]), $MachinePrecision], N[(d1 * d3), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;d3 \leq 2.5 \cdot 10^{+18}:\\
\;\;\;\;d1 \cdot \left(d2 + 37\right)\\

\mathbf{else}:\\
\;\;\;\;d1 \cdot d3\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if d3 < 2.5e18

    1. Initial program 97.4%

      \[\left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32 \]
    2. Step-by-step derivation
      1. *-commutative97.4%

        \[\leadsto \left(d1 \cdot d2 + \color{blue}{d1 \cdot \left(d3 + 5\right)}\right) + d1 \cdot 32 \]
      2. distribute-lft-out99.9%

        \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 5\right)\right)} + d1 \cdot 32 \]
      3. distribute-lft-out100.0%

        \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + \left(d3 + 5\right)\right) + 32\right)} \]
      4. associate-+r+100.0%

        \[\leadsto d1 \cdot \color{blue}{\left(d2 + \left(\left(d3 + 5\right) + 32\right)\right)} \]
      5. associate-+l+100.0%

        \[\leadsto d1 \cdot \left(d2 + \color{blue}{\left(d3 + \left(5 + 32\right)\right)}\right) \]
      6. metadata-eval100.0%

        \[\leadsto d1 \cdot \left(d2 + \left(d3 + \color{blue}{37}\right)\right) \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 37\right)\right)} \]
    4. Taylor expanded in d3 around 0 72.1%

      \[\leadsto \color{blue}{d1 \cdot \left(d2 + 37\right)} \]

    if 2.5e18 < d3

    1. Initial program 94.6%

      \[\left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32 \]
    2. Step-by-step derivation
      1. *-commutative94.6%

        \[\leadsto \left(d1 \cdot d2 + \color{blue}{d1 \cdot \left(d3 + 5\right)}\right) + d1 \cdot 32 \]
      2. distribute-lft-out100.0%

        \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 5\right)\right)} + d1 \cdot 32 \]
      3. distribute-lft-out100.0%

        \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + \left(d3 + 5\right)\right) + 32\right)} \]
      4. associate-+r+100.0%

        \[\leadsto d1 \cdot \color{blue}{\left(d2 + \left(\left(d3 + 5\right) + 32\right)\right)} \]
      5. associate-+l+100.0%

        \[\leadsto d1 \cdot \left(d2 + \color{blue}{\left(d3 + \left(5 + 32\right)\right)}\right) \]
      6. metadata-eval100.0%

        \[\leadsto d1 \cdot \left(d2 + \left(d3 + \color{blue}{37}\right)\right) \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 37\right)\right)} \]
    4. Taylor expanded in d3 around inf 73.2%

      \[\leadsto \color{blue}{d1 \cdot d3} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification72.3%

    \[\leadsto \begin{array}{l} \mathbf{if}\;d3 \leq 2.5 \cdot 10^{+18}:\\ \;\;\;\;d1 \cdot \left(d2 + 37\right)\\ \mathbf{else}:\\ \;\;\;\;d1 \cdot d3\\ \end{array} \]

Alternative 4: 76.1% accurate, 1.8× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;d2 \leq -3300000000000:\\ \;\;\;\;d1 \cdot d2\\ \mathbf{else}:\\ \;\;\;\;d1 \cdot \left(d3 + 37\right)\\ \end{array} \end{array} \]
(FPCore (d1 d2 d3)
 :precision binary64
 (if (<= d2 -3300000000000.0) (* d1 d2) (* d1 (+ d3 37.0))))
double code(double d1, double d2, double d3) {
	double tmp;
	if (d2 <= -3300000000000.0) {
		tmp = d1 * d2;
	} else {
		tmp = d1 * (d3 + 37.0);
	}
	return tmp;
}
real(8) function code(d1, d2, d3)
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8) :: tmp
    if (d2 <= (-3300000000000.0d0)) then
        tmp = d1 * d2
    else
        tmp = d1 * (d3 + 37.0d0)
    end if
    code = tmp
end function
public static double code(double d1, double d2, double d3) {
	double tmp;
	if (d2 <= -3300000000000.0) {
		tmp = d1 * d2;
	} else {
		tmp = d1 * (d3 + 37.0);
	}
	return tmp;
}
def code(d1, d2, d3):
	tmp = 0
	if d2 <= -3300000000000.0:
		tmp = d1 * d2
	else:
		tmp = d1 * (d3 + 37.0)
	return tmp
function code(d1, d2, d3)
	tmp = 0.0
	if (d2 <= -3300000000000.0)
		tmp = Float64(d1 * d2);
	else
		tmp = Float64(d1 * Float64(d3 + 37.0));
	end
	return tmp
end
function tmp_2 = code(d1, d2, d3)
	tmp = 0.0;
	if (d2 <= -3300000000000.0)
		tmp = d1 * d2;
	else
		tmp = d1 * (d3 + 37.0);
	end
	tmp_2 = tmp;
end
code[d1_, d2_, d3_] := If[LessEqual[d2, -3300000000000.0], N[(d1 * d2), $MachinePrecision], N[(d1 * N[(d3 + 37.0), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;d2 \leq -3300000000000:\\
\;\;\;\;d1 \cdot d2\\

\mathbf{else}:\\
\;\;\;\;d1 \cdot \left(d3 + 37\right)\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if d2 < -3.3e12

    1. Initial program 95.7%

      \[\left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32 \]
    2. Step-by-step derivation
      1. *-commutative95.7%

        \[\leadsto \left(d1 \cdot d2 + \color{blue}{d1 \cdot \left(d3 + 5\right)}\right) + d1 \cdot 32 \]
      2. distribute-lft-out100.0%

        \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 5\right)\right)} + d1 \cdot 32 \]
      3. distribute-lft-out100.0%

        \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + \left(d3 + 5\right)\right) + 32\right)} \]
      4. associate-+r+100.0%

        \[\leadsto d1 \cdot \color{blue}{\left(d2 + \left(\left(d3 + 5\right) + 32\right)\right)} \]
      5. associate-+l+100.0%

        \[\leadsto d1 \cdot \left(d2 + \color{blue}{\left(d3 + \left(5 + 32\right)\right)}\right) \]
      6. metadata-eval100.0%

        \[\leadsto d1 \cdot \left(d2 + \left(d3 + \color{blue}{37}\right)\right) \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 37\right)\right)} \]
    4. Taylor expanded in d2 around inf 71.2%

      \[\leadsto \color{blue}{d2 \cdot d1} \]

    if -3.3e12 < d2

    1. Initial program 97.3%

      \[\left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32 \]
    2. Step-by-step derivation
      1. *-commutative97.3%

        \[\leadsto \left(d1 \cdot d2 + \color{blue}{d1 \cdot \left(d3 + 5\right)}\right) + d1 \cdot 32 \]
      2. distribute-lft-out99.9%

        \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 5\right)\right)} + d1 \cdot 32 \]
      3. distribute-lft-out100.0%

        \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + \left(d3 + 5\right)\right) + 32\right)} \]
      4. associate-+r+100.0%

        \[\leadsto d1 \cdot \color{blue}{\left(d2 + \left(\left(d3 + 5\right) + 32\right)\right)} \]
      5. associate-+l+100.0%

        \[\leadsto d1 \cdot \left(d2 + \color{blue}{\left(d3 + \left(5 + 32\right)\right)}\right) \]
      6. metadata-eval100.0%

        \[\leadsto d1 \cdot \left(d2 + \left(d3 + \color{blue}{37}\right)\right) \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 37\right)\right)} \]
    4. Taylor expanded in d2 around 0 77.2%

      \[\leadsto \color{blue}{\left(37 + d3\right) \cdot d1} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification75.6%

    \[\leadsto \begin{array}{l} \mathbf{if}\;d2 \leq -3300000000000:\\ \;\;\;\;d1 \cdot d2\\ \mathbf{else}:\\ \;\;\;\;d1 \cdot \left(d3 + 37\right)\\ \end{array} \]

Alternative 5: 43.9% accurate, 2.6× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;d3 \leq 38:\\ \;\;\;\;d1 \cdot 37\\ \mathbf{else}:\\ \;\;\;\;d1 \cdot d3\\ \end{array} \end{array} \]
(FPCore (d1 d2 d3) :precision binary64 (if (<= d3 38.0) (* d1 37.0) (* d1 d3)))
double code(double d1, double d2, double d3) {
	double tmp;
	if (d3 <= 38.0) {
		tmp = d1 * 37.0;
	} else {
		tmp = d1 * d3;
	}
	return tmp;
}
real(8) function code(d1, d2, d3)
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8) :: tmp
    if (d3 <= 38.0d0) then
        tmp = d1 * 37.0d0
    else
        tmp = d1 * d3
    end if
    code = tmp
end function
public static double code(double d1, double d2, double d3) {
	double tmp;
	if (d3 <= 38.0) {
		tmp = d1 * 37.0;
	} else {
		tmp = d1 * d3;
	}
	return tmp;
}
def code(d1, d2, d3):
	tmp = 0
	if d3 <= 38.0:
		tmp = d1 * 37.0
	else:
		tmp = d1 * d3
	return tmp
function code(d1, d2, d3)
	tmp = 0.0
	if (d3 <= 38.0)
		tmp = Float64(d1 * 37.0);
	else
		tmp = Float64(d1 * d3);
	end
	return tmp
end
function tmp_2 = code(d1, d2, d3)
	tmp = 0.0;
	if (d3 <= 38.0)
		tmp = d1 * 37.0;
	else
		tmp = d1 * d3;
	end
	tmp_2 = tmp;
end
code[d1_, d2_, d3_] := If[LessEqual[d3, 38.0], N[(d1 * 37.0), $MachinePrecision], N[(d1 * d3), $MachinePrecision]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;d3 \leq 38:\\
\;\;\;\;d1 \cdot 37\\

\mathbf{else}:\\
\;\;\;\;d1 \cdot d3\\


\end{array}
\end{array}
Derivation
  1. Split input into 2 regimes
  2. if d3 < 38

    1. Initial program 97.4%

      \[\left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32 \]
    2. Step-by-step derivation
      1. *-commutative97.4%

        \[\leadsto \left(d1 \cdot d2 + \color{blue}{d1 \cdot \left(d3 + 5\right)}\right) + d1 \cdot 32 \]
      2. distribute-lft-out99.9%

        \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 5\right)\right)} + d1 \cdot 32 \]
      3. distribute-lft-out100.0%

        \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + \left(d3 + 5\right)\right) + 32\right)} \]
      4. associate-+r+100.0%

        \[\leadsto d1 \cdot \color{blue}{\left(d2 + \left(\left(d3 + 5\right) + 32\right)\right)} \]
      5. associate-+l+100.0%

        \[\leadsto d1 \cdot \left(d2 + \color{blue}{\left(d3 + \left(5 + 32\right)\right)}\right) \]
      6. metadata-eval100.0%

        \[\leadsto d1 \cdot \left(d2 + \left(d3 + \color{blue}{37}\right)\right) \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 37\right)\right)} \]
    4. Taylor expanded in d2 around 0 63.2%

      \[\leadsto \color{blue}{\left(37 + d3\right) \cdot d1} \]
    5. Taylor expanded in d3 around 0 34.8%

      \[\leadsto \color{blue}{37 \cdot d1} \]

    if 38 < d3

    1. Initial program 95.1%

      \[\left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32 \]
    2. Step-by-step derivation
      1. *-commutative95.1%

        \[\leadsto \left(d1 \cdot d2 + \color{blue}{d1 \cdot \left(d3 + 5\right)}\right) + d1 \cdot 32 \]
      2. distribute-lft-out100.0%

        \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 5\right)\right)} + d1 \cdot 32 \]
      3. distribute-lft-out100.0%

        \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + \left(d3 + 5\right)\right) + 32\right)} \]
      4. associate-+r+100.0%

        \[\leadsto d1 \cdot \color{blue}{\left(d2 + \left(\left(d3 + 5\right) + 32\right)\right)} \]
      5. associate-+l+100.0%

        \[\leadsto d1 \cdot \left(d2 + \color{blue}{\left(d3 + \left(5 + 32\right)\right)}\right) \]
      6. metadata-eval100.0%

        \[\leadsto d1 \cdot \left(d2 + \left(d3 + \color{blue}{37}\right)\right) \]
    3. Simplified100.0%

      \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 37\right)\right)} \]
    4. Taylor expanded in d3 around inf 69.8%

      \[\leadsto \color{blue}{d1 \cdot d3} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification43.1%

    \[\leadsto \begin{array}{l} \mathbf{if}\;d3 \leq 38:\\ \;\;\;\;d1 \cdot 37\\ \mathbf{else}:\\ \;\;\;\;d1 \cdot d3\\ \end{array} \]

Alternative 6: 26.4% accurate, 4.3× speedup?

\[\begin{array}{l} \\ d1 \cdot 37 \end{array} \]
(FPCore (d1 d2 d3) :precision binary64 (* d1 37.0))
double code(double d1, double d2, double d3) {
	return d1 * 37.0;
}
real(8) function code(d1, d2, d3)
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    code = d1 * 37.0d0
end function
public static double code(double d1, double d2, double d3) {
	return d1 * 37.0;
}
def code(d1, d2, d3):
	return d1 * 37.0
function code(d1, d2, d3)
	return Float64(d1 * 37.0)
end
function tmp = code(d1, d2, d3)
	tmp = d1 * 37.0;
end
code[d1_, d2_, d3_] := N[(d1 * 37.0), $MachinePrecision]
\begin{array}{l}

\\
d1 \cdot 37
\end{array}
Derivation
  1. Initial program 96.8%

    \[\left(d1 \cdot d2 + \left(d3 + 5\right) \cdot d1\right) + d1 \cdot 32 \]
  2. Step-by-step derivation
    1. *-commutative96.8%

      \[\leadsto \left(d1 \cdot d2 + \color{blue}{d1 \cdot \left(d3 + 5\right)}\right) + d1 \cdot 32 \]
    2. distribute-lft-out100.0%

      \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 5\right)\right)} + d1 \cdot 32 \]
    3. distribute-lft-out100.0%

      \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + \left(d3 + 5\right)\right) + 32\right)} \]
    4. associate-+r+100.0%

      \[\leadsto d1 \cdot \color{blue}{\left(d2 + \left(\left(d3 + 5\right) + 32\right)\right)} \]
    5. associate-+l+100.0%

      \[\leadsto d1 \cdot \left(d2 + \color{blue}{\left(d3 + \left(5 + 32\right)\right)}\right) \]
    6. metadata-eval100.0%

      \[\leadsto d1 \cdot \left(d2 + \left(d3 + \color{blue}{37}\right)\right) \]
  3. Simplified100.0%

    \[\leadsto \color{blue}{d1 \cdot \left(d2 + \left(d3 + 37\right)\right)} \]
  4. Taylor expanded in d2 around 0 64.9%

    \[\leadsto \color{blue}{\left(37 + d3\right) \cdot d1} \]
  5. Taylor expanded in d3 around 0 27.7%

    \[\leadsto \color{blue}{37 \cdot d1} \]
  6. Final simplification27.7%

    \[\leadsto d1 \cdot 37 \]

Developer target: 100.0% accurate, 1.9× speedup?

\[\begin{array}{l} \\ d1 \cdot \left(\left(37 + d3\right) + d2\right) \end{array} \]
(FPCore (d1 d2 d3) :precision binary64 (* d1 (+ (+ 37.0 d3) d2)))
double code(double d1, double d2, double d3) {
	return d1 * ((37.0 + d3) + d2);
}
real(8) function code(d1, d2, d3)
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    code = d1 * ((37.0d0 + d3) + d2)
end function
public static double code(double d1, double d2, double d3) {
	return d1 * ((37.0 + d3) + d2);
}
def code(d1, d2, d3):
	return d1 * ((37.0 + d3) + d2)
function code(d1, d2, d3)
	return Float64(d1 * Float64(Float64(37.0 + d3) + d2))
end
function tmp = code(d1, d2, d3)
	tmp = d1 * ((37.0 + d3) + d2);
end
code[d1_, d2_, d3_] := N[(d1 * N[(N[(37.0 + d3), $MachinePrecision] + d2), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
d1 \cdot \left(\left(37 + d3\right) + d2\right)
\end{array}

Reproduce

?
herbie shell --seed 2023189 
(FPCore (d1 d2 d3)
  :name "FastMath dist3"
  :precision binary64

  :herbie-target
  (* d1 (+ (+ 37.0 d3) d2))

  (+ (+ (* d1 d2) (* (+ d3 5.0) d1)) (* d1 32.0)))