Average Error: 59.5 → 25.2
Time: 21.3s
Precision: binary64
\[\frac{c0}{2 \cdot w} \cdot \left(\frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} + \sqrt{\frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} \cdot \frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} - M \cdot M}\right) \]
↓
\[\begin{array}{l} \mathbf{if}\;M \cdot M \leq 1.143943990463084 \cdot 10^{+295}:\\ \;\;\;\;0.25 \cdot \left(D \cdot \left(\left(h \cdot \frac{D}{d}\right) \cdot \frac{M \cdot M}{d}\right)\right)\\ \mathbf{else}:\\ \;\;\;\;0.25 \cdot \left(D \cdot \left(\frac{D}{d} \cdot \frac{M \cdot \left(M \cdot h\right)}{d}\right)\right)\\ \end{array} \]
\frac{c0}{2 \cdot w} \cdot \left(\frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} + \sqrt{\frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} \cdot \frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} - M \cdot M}\right)
↓
\begin{array}{l}
\mathbf{if}\;M \cdot M \leq 1.143943990463084 \cdot 10^{+295}:\\
\;\;\;\;0.25 \cdot \left(D \cdot \left(\left(h \cdot \frac{D}{d}\right) \cdot \frac{M \cdot M}{d}\right)\right)\\

\mathbf{else}:\\
\;\;\;\;0.25 \cdot \left(D \cdot \left(\frac{D}{d} \cdot \frac{M \cdot \left(M \cdot h\right)}{d}\right)\right)\\


\end{array}

(FPCore (c0 w h D d M)
 :precision binary64
 (*
  (/ c0 (* 2.0 w))
  (+
   (/ (* c0 (* d d)) (* (* w h) (* D D)))
   (sqrt
    (-
     (*
      (/ (* c0 (* d d)) (* (* w h) (* D D)))
      (/ (* c0 (* d d)) (* (* w h) (* D D))))
     (* M M))))))
↓
(FPCore (c0 w h D d M)
 :precision binary64
 (if (<= (* M M) 1.143943990463084e+295)
   (* 0.25 (* D (* (* h (/ D d)) (/ (* M M) d))))
   (* 0.25 (* D (* (/ D d) (/ (* M (* M h)) d))))))
double code(double c0, double w, double h, double D, double d, double M) {
	return (c0 / (2.0 * w)) * (((c0 * (d * d)) / ((w * h) * (D * D))) + sqrt((((c0 * (d * d)) / ((w * h) * (D * D))) * ((c0 * (d * d)) / ((w * h) * (D * D)))) - (M * M)));
}
↓
double code(double c0, double w, double h, double D, double d, double M) {
	double tmp;
	if ((M * M) <= 1.143943990463084e+295) {
		tmp = 0.25 * (D * ((h * (D / d)) * ((M * M) / d)));
	} else {
		tmp = 0.25 * (D * ((D / d) * ((M * (M * h)) / d)));
	}
	return tmp;
}

Error

Bits error versus c0

Bits error versus w

Bits error versus h

Bits error versus D

Bits error versus d

Bits error versus M

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Split input into 2 regimes

  2. if (*.f64 M M) < 1.14394399046308391e295

    1. Initial program 58.7

      \[\frac{c0}{2 \cdot w} \cdot \left(\frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} + \sqrt{\frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} \cdot \frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} - M \cdot M}\right) \]

    2. Taylor expanded in c0 around -inf 31.7

      \[\leadsto \color{blue}{0.25 \cdot \frac{{D}^{2} \cdot \left({M}^{2} \cdot h\right)}{{d}^{2}}} \]

    3. Applied add-sqr-sqrt_binary6448.4

      \[\leadsto 0.25 \cdot \frac{{D}^{2} \cdot \left({M}^{2} \cdot h\right)}{{\color{blue}{\left(\sqrt{d} \cdot \sqrt{d}\right)}}^{2}} \]

    4. Applied unpow-prod-down_binary6448.4

      \[\leadsto 0.25 \cdot \frac{{D}^{2} \cdot \left({M}^{2} \cdot h\right)}{\color{blue}{{\left(\sqrt{d}\right)}^{2} \cdot {\left(\sqrt{d}\right)}^{2}}} \]

    5. Applied times-frac_binary6446.4

      \[\leadsto 0.25 \cdot \color{blue}{\left(\frac{{D}^{2}}{{\left(\sqrt{d}\right)}^{2}} \cdot \frac{{M}^{2} \cdot h}{{\left(\sqrt{d}\right)}^{2}}\right)} \]

    6. Simplified46.4

      \[\leadsto 0.25 \cdot \left(\color{blue}{\frac{D \cdot D}{d}} \cdot \frac{{M}^{2} \cdot h}{{\left(\sqrt{d}\right)}^{2}}\right) \]

    7. Simplified28.0

      \[\leadsto 0.25 \cdot \left(\frac{D \cdot D}{d} \cdot \color{blue}{\frac{h \cdot \left(M \cdot M\right)}{d}}\right) \]

    8. Applied *-un-lft-identity_binary6428.0

      \[\leadsto 0.25 \cdot \left(\frac{D \cdot D}{\color{blue}{1 \cdot d}} \cdot \frac{h \cdot \left(M \cdot M\right)}{d}\right) \]

    9. Applied times-frac_binary6424.4

      \[\leadsto 0.25 \cdot \left(\color{blue}{\left(\frac{D}{1} \cdot \frac{D}{d}\right)} \cdot \frac{h \cdot \left(M \cdot M\right)}{d}\right) \]

    10. Applied associate-*l*_binary6423.2

      \[\leadsto 0.25 \cdot \color{blue}{\left(\frac{D}{1} \cdot \left(\frac{D}{d} \cdot \frac{h \cdot \left(M \cdot M\right)}{d}\right)\right)} \]

    11. Applied *-un-lft-identity_binary6423.2

      \[\leadsto 0.25 \cdot \left(\frac{D}{1} \cdot \left(\frac{D}{d} \cdot \frac{h \cdot \left(M \cdot M\right)}{\color{blue}{1 \cdot d}}\right)\right) \]

    12. Applied times-frac_binary6422.4

      \[\leadsto 0.25 \cdot \left(\frac{D}{1} \cdot \left(\frac{D}{d} \cdot \color{blue}{\left(\frac{h}{1} \cdot \frac{M \cdot M}{d}\right)}\right)\right) \]

    13. Applied associate-*r*_binary6421.7

      \[\leadsto 0.25 \cdot \left(\frac{D}{1} \cdot \color{blue}{\left(\left(\frac{D}{d} \cdot \frac{h}{1}\right) \cdot \frac{M \cdot M}{d}\right)}\right) \]

    14. Simplified21.7

      \[\leadsto 0.25 \cdot \left(\frac{D}{1} \cdot \left(\color{blue}{\left(h \cdot \frac{D}{d}\right)} \cdot \frac{M \cdot M}{d}\right)\right) \]

    if 1.14394399046308391e295 < (*.f64 M M)

    1. Initial program 64.0

      \[\frac{c0}{2 \cdot w} \cdot \left(\frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} + \sqrt{\frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} \cdot \frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} - M \cdot M}\right) \]

    2. Taylor expanded in c0 around -inf 62.9

      \[\leadsto \color{blue}{0.25 \cdot \frac{{D}^{2} \cdot \left({M}^{2} \cdot h\right)}{{d}^{2}}} \]

    3. Applied add-sqr-sqrt_binary6463.3

      \[\leadsto 0.25 \cdot \frac{{D}^{2} \cdot \left({M}^{2} \cdot h\right)}{{\color{blue}{\left(\sqrt{d} \cdot \sqrt{d}\right)}}^{2}} \]

    4. Applied unpow-prod-down_binary6463.3

      \[\leadsto 0.25 \cdot \frac{{D}^{2} \cdot \left({M}^{2} \cdot h\right)}{\color{blue}{{\left(\sqrt{d}\right)}^{2} \cdot {\left(\sqrt{d}\right)}^{2}}} \]

    5. Applied times-frac_binary6463.3

      \[\leadsto 0.25 \cdot \color{blue}{\left(\frac{{D}^{2}}{{\left(\sqrt{d}\right)}^{2}} \cdot \frac{{M}^{2} \cdot h}{{\left(\sqrt{d}\right)}^{2}}\right)} \]

    6. Simplified63.3

      \[\leadsto 0.25 \cdot \left(\color{blue}{\frac{D \cdot D}{d}} \cdot \frac{{M}^{2} \cdot h}{{\left(\sqrt{d}\right)}^{2}}\right) \]

    7. Simplified62.5

      \[\leadsto 0.25 \cdot \left(\frac{D \cdot D}{d} \cdot \color{blue}{\frac{h \cdot \left(M \cdot M\right)}{d}}\right) \]

    8. Applied *-un-lft-identity_binary6462.5

      \[\leadsto 0.25 \cdot \left(\frac{D \cdot D}{\color{blue}{1 \cdot d}} \cdot \frac{h \cdot \left(M \cdot M\right)}{d}\right) \]

    9. Applied times-frac_binary6462.4

      \[\leadsto 0.25 \cdot \left(\color{blue}{\left(\frac{D}{1} \cdot \frac{D}{d}\right)} \cdot \frac{h \cdot \left(M \cdot M\right)}{d}\right) \]

    10. Applied associate-*l*_binary6462.3

      \[\leadsto 0.25 \cdot \color{blue}{\left(\frac{D}{1} \cdot \left(\frac{D}{d} \cdot \frac{h \cdot \left(M \cdot M\right)}{d}\right)\right)} \]

    11. Applied associate-*r*_binary6446.4

      \[\leadsto 0.25 \cdot \left(\frac{D}{1} \cdot \left(\frac{D}{d} \cdot \frac{\color{blue}{\left(h \cdot M\right) \cdot M}}{d}\right)\right) \]
  3. Recombined 2 regimes into one program.

  4. Final simplification25.2

    \[\leadsto \begin{array}{l} \mathbf{if}\;M \cdot M \leq 1.143943990463084 \cdot 10^{+295}:\\ \;\;\;\;0.25 \cdot \left(D \cdot \left(\left(h \cdot \frac{D}{d}\right) \cdot \frac{M \cdot M}{d}\right)\right)\\ \mathbf{else}:\\ \;\;\;\;0.25 \cdot \left(D \cdot \left(\frac{D}{d} \cdot \frac{M \cdot \left(M \cdot h\right)}{d}\right)\right)\\ \end{array} \]

Reproduce

herbie shell --seed 2022103 
(FPCore (c0 w h D d M)
  :name "Henrywood and Agarwal, Equation (13)"
  :precision binary64
  (* (/ c0 (* 2.0 w)) (+ (/ (* c0 (* d d)) (* (* w h) (* D D))) (sqrt (- (* (/ (* c0 (* d d)) (* (* w h) (* D D))) (/ (* c0 (* d d)) (* (* w h) (* D D)))) (* M M))))))