| Alternative 1 | |
|---|---|
| Accuracy | 99.7% |
| Cost | 2372 |

(FPCore (alpha beta) :precision binary64 (/ (/ (/ (+ (+ (+ alpha beta) (* beta alpha)) 1.0) (+ (+ alpha beta) (* 2.0 1.0))) (+ (+ alpha beta) (* 2.0 1.0))) (+ (+ (+ alpha beta) (* 2.0 1.0)) 1.0)))
(FPCore (alpha beta)
:precision binary64
(let* ((t_0 (+ 2.0 (+ beta alpha))))
(if (<= beta 1e+114)
(*
(/ (+ beta 1.0) (+ alpha (+ beta 3.0)))
(/
(+ 1.0 alpha)
(+ (* beta beta) (* (+ alpha 2.0) (+ (+ alpha 2.0) (* beta 2.0))))))
(/
(/
(+
(/ 1.0 beta)
(+
(+ (+ 1.0 alpha) (/ alpha beta))
(/ (- -1.0 alpha) (/ beta (+ alpha 2.0)))))
t_0)
(+ 1.0 t_0)))))double code(double alpha, double beta) {
return (((((alpha + beta) + (beta * alpha)) + 1.0) / ((alpha + beta) + (2.0 * 1.0))) / ((alpha + beta) + (2.0 * 1.0))) / (((alpha + beta) + (2.0 * 1.0)) + 1.0);
}
double code(double alpha, double beta) {
double t_0 = 2.0 + (beta + alpha);
double tmp;
if (beta <= 1e+114) {
tmp = ((beta + 1.0) / (alpha + (beta + 3.0))) * ((1.0 + alpha) / ((beta * beta) + ((alpha + 2.0) * ((alpha + 2.0) + (beta * 2.0)))));
} else {
tmp = (((1.0 / beta) + (((1.0 + alpha) + (alpha / beta)) + ((-1.0 - alpha) / (beta / (alpha + 2.0))))) / t_0) / (1.0 + t_0);
}
return tmp;
}
real(8) function code(alpha, beta)
real(8), intent (in) :: alpha
real(8), intent (in) :: beta
code = (((((alpha + beta) + (beta * alpha)) + 1.0d0) / ((alpha + beta) + (2.0d0 * 1.0d0))) / ((alpha + beta) + (2.0d0 * 1.0d0))) / (((alpha + beta) + (2.0d0 * 1.0d0)) + 1.0d0)
end function
real(8) function code(alpha, beta)
real(8), intent (in) :: alpha
real(8), intent (in) :: beta
real(8) :: t_0
real(8) :: tmp
t_0 = 2.0d0 + (beta + alpha)
if (beta <= 1d+114) then
tmp = ((beta + 1.0d0) / (alpha + (beta + 3.0d0))) * ((1.0d0 + alpha) / ((beta * beta) + ((alpha + 2.0d0) * ((alpha + 2.0d0) + (beta * 2.0d0)))))
else
tmp = (((1.0d0 / beta) + (((1.0d0 + alpha) + (alpha / beta)) + (((-1.0d0) - alpha) / (beta / (alpha + 2.0d0))))) / t_0) / (1.0d0 + t_0)
end if
code = tmp
end function
public static double code(double alpha, double beta) {
return (((((alpha + beta) + (beta * alpha)) + 1.0) / ((alpha + beta) + (2.0 * 1.0))) / ((alpha + beta) + (2.0 * 1.0))) / (((alpha + beta) + (2.0 * 1.0)) + 1.0);
}
public static double code(double alpha, double beta) {
double t_0 = 2.0 + (beta + alpha);
double tmp;
if (beta <= 1e+114) {
tmp = ((beta + 1.0) / (alpha + (beta + 3.0))) * ((1.0 + alpha) / ((beta * beta) + ((alpha + 2.0) * ((alpha + 2.0) + (beta * 2.0)))));
} else {
tmp = (((1.0 / beta) + (((1.0 + alpha) + (alpha / beta)) + ((-1.0 - alpha) / (beta / (alpha + 2.0))))) / t_0) / (1.0 + t_0);
}
return tmp;
}
def code(alpha, beta): return (((((alpha + beta) + (beta * alpha)) + 1.0) / ((alpha + beta) + (2.0 * 1.0))) / ((alpha + beta) + (2.0 * 1.0))) / (((alpha + beta) + (2.0 * 1.0)) + 1.0)
def code(alpha, beta): t_0 = 2.0 + (beta + alpha) tmp = 0 if beta <= 1e+114: tmp = ((beta + 1.0) / (alpha + (beta + 3.0))) * ((1.0 + alpha) / ((beta * beta) + ((alpha + 2.0) * ((alpha + 2.0) + (beta * 2.0))))) else: tmp = (((1.0 / beta) + (((1.0 + alpha) + (alpha / beta)) + ((-1.0 - alpha) / (beta / (alpha + 2.0))))) / t_0) / (1.0 + t_0) return tmp
function code(alpha, beta) return Float64(Float64(Float64(Float64(Float64(Float64(alpha + beta) + Float64(beta * alpha)) + 1.0) / Float64(Float64(alpha + beta) + Float64(2.0 * 1.0))) / Float64(Float64(alpha + beta) + Float64(2.0 * 1.0))) / Float64(Float64(Float64(alpha + beta) + Float64(2.0 * 1.0)) + 1.0)) end
function code(alpha, beta) t_0 = Float64(2.0 + Float64(beta + alpha)) tmp = 0.0 if (beta <= 1e+114) tmp = Float64(Float64(Float64(beta + 1.0) / Float64(alpha + Float64(beta + 3.0))) * Float64(Float64(1.0 + alpha) / Float64(Float64(beta * beta) + Float64(Float64(alpha + 2.0) * Float64(Float64(alpha + 2.0) + Float64(beta * 2.0)))))); else tmp = Float64(Float64(Float64(Float64(1.0 / beta) + Float64(Float64(Float64(1.0 + alpha) + Float64(alpha / beta)) + Float64(Float64(-1.0 - alpha) / Float64(beta / Float64(alpha + 2.0))))) / t_0) / Float64(1.0 + t_0)); end return tmp end
function tmp = code(alpha, beta) tmp = (((((alpha + beta) + (beta * alpha)) + 1.0) / ((alpha + beta) + (2.0 * 1.0))) / ((alpha + beta) + (2.0 * 1.0))) / (((alpha + beta) + (2.0 * 1.0)) + 1.0); end
function tmp_2 = code(alpha, beta) t_0 = 2.0 + (beta + alpha); tmp = 0.0; if (beta <= 1e+114) tmp = ((beta + 1.0) / (alpha + (beta + 3.0))) * ((1.0 + alpha) / ((beta * beta) + ((alpha + 2.0) * ((alpha + 2.0) + (beta * 2.0))))); else tmp = (((1.0 / beta) + (((1.0 + alpha) + (alpha / beta)) + ((-1.0 - alpha) / (beta / (alpha + 2.0))))) / t_0) / (1.0 + t_0); end tmp_2 = tmp; end
code[alpha_, beta_] := N[(N[(N[(N[(N[(N[(alpha + beta), $MachinePrecision] + N[(beta * alpha), $MachinePrecision]), $MachinePrecision] + 1.0), $MachinePrecision] / N[(N[(alpha + beta), $MachinePrecision] + N[(2.0 * 1.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / N[(N[(alpha + beta), $MachinePrecision] + N[(2.0 * 1.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / N[(N[(N[(alpha + beta), $MachinePrecision] + N[(2.0 * 1.0), $MachinePrecision]), $MachinePrecision] + 1.0), $MachinePrecision]), $MachinePrecision]
code[alpha_, beta_] := Block[{t$95$0 = N[(2.0 + N[(beta + alpha), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[beta, 1e+114], N[(N[(N[(beta + 1.0), $MachinePrecision] / N[(alpha + N[(beta + 3.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * N[(N[(1.0 + alpha), $MachinePrecision] / N[(N[(beta * beta), $MachinePrecision] + N[(N[(alpha + 2.0), $MachinePrecision] * N[(N[(alpha + 2.0), $MachinePrecision] + N[(beta * 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[(N[(N[(1.0 / beta), $MachinePrecision] + N[(N[(N[(1.0 + alpha), $MachinePrecision] + N[(alpha / beta), $MachinePrecision]), $MachinePrecision] + N[(N[(-1.0 - alpha), $MachinePrecision] / N[(beta / N[(alpha + 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / t$95$0), $MachinePrecision] / N[(1.0 + t$95$0), $MachinePrecision]), $MachinePrecision]]]
\frac{\frac{\frac{\left(\left(\alpha + \beta\right) + \beta \cdot \alpha\right) + 1}{\left(\alpha + \beta\right) + 2 \cdot 1}}{\left(\alpha + \beta\right) + 2 \cdot 1}}{\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1}
\begin{array}{l}
t_0 := 2 + \left(\beta + \alpha\right)\\
\mathbf{if}\;\beta \leq 10^{+114}:\\
\;\;\;\;\frac{\beta + 1}{\alpha + \left(\beta + 3\right)} \cdot \frac{1 + \alpha}{\beta \cdot \beta + \left(\alpha + 2\right) \cdot \left(\left(\alpha + 2\right) + \beta \cdot 2\right)}\\
\mathbf{else}:\\
\;\;\;\;\frac{\frac{\frac{1}{\beta} + \left(\left(\left(1 + \alpha\right) + \frac{\alpha}{\beta}\right) + \frac{-1 - \alpha}{\frac{\beta}{\alpha + 2}}\right)}{t_0}}{1 + t_0}\\
\end{array}
Herbie found 19 alternatives:
| Alternative | Accuracy | Speedup |
|---|
Results
if beta < 1e114Initial program 99.8%
Simplified99.8%
[Start]99.8% | \[ \frac{\frac{\frac{\left(\left(\alpha + \beta\right) + \beta \cdot \alpha\right) + 1}{\left(\alpha + \beta\right) + 2 \cdot 1}}{\left(\alpha + \beta\right) + 2 \cdot 1}}{\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1}
\] |
|---|---|
associate-/l/ [=>]99.8% | \[ \frac{\color{blue}{\frac{\left(\left(\alpha + \beta\right) + \beta \cdot \alpha\right) + 1}{\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) \cdot \left(\left(\alpha + \beta\right) + 2 \cdot 1\right)}}}{\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1}
\] |
associate-/l/ [=>]95.4% | \[ \color{blue}{\frac{\left(\left(\alpha + \beta\right) + \beta \cdot \alpha\right) + 1}{\left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1\right) \cdot \left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) \cdot \left(\left(\alpha + \beta\right) + 2 \cdot 1\right)\right)}}
\] |
associate-+l+ [=>]95.4% | \[ \frac{\color{blue}{\left(\alpha + \left(\beta + \beta \cdot \alpha\right)\right)} + 1}{\left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1\right) \cdot \left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) \cdot \left(\left(\alpha + \beta\right) + 2 \cdot 1\right)\right)}
\] |
+-commutative [=>]95.4% | \[ \frac{\left(\alpha + \color{blue}{\left(\beta \cdot \alpha + \beta\right)}\right) + 1}{\left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1\right) \cdot \left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) \cdot \left(\left(\alpha + \beta\right) + 2 \cdot 1\right)\right)}
\] |
associate-+r+ [=>]95.4% | \[ \frac{\color{blue}{\left(\left(\alpha + \beta \cdot \alpha\right) + \beta\right)} + 1}{\left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1\right) \cdot \left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) \cdot \left(\left(\alpha + \beta\right) + 2 \cdot 1\right)\right)}
\] |
associate-+l+ [=>]95.4% | \[ \frac{\color{blue}{\left(\alpha + \beta \cdot \alpha\right) + \left(\beta + 1\right)}}{\left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1\right) \cdot \left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) \cdot \left(\left(\alpha + \beta\right) + 2 \cdot 1\right)\right)}
\] |
distribute-rgt1-in [=>]95.4% | \[ \frac{\color{blue}{\left(\beta + 1\right) \cdot \alpha} + \left(\beta + 1\right)}{\left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1\right) \cdot \left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) \cdot \left(\left(\alpha + \beta\right) + 2 \cdot 1\right)\right)}
\] |
*-rgt-identity [<=]95.4% | \[ \frac{\left(\beta + 1\right) \cdot \alpha + \color{blue}{\left(\beta + 1\right) \cdot 1}}{\left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1\right) \cdot \left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) \cdot \left(\left(\alpha + \beta\right) + 2 \cdot 1\right)\right)}
\] |
distribute-lft-out [=>]95.4% | \[ \frac{\color{blue}{\left(\beta + 1\right) \cdot \left(\alpha + 1\right)}}{\left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1\right) \cdot \left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) \cdot \left(\left(\alpha + \beta\right) + 2 \cdot 1\right)\right)}
\] |
+-commutative [=>]95.4% | \[ \frac{\left(\beta + 1\right) \cdot \color{blue}{\left(1 + \alpha\right)}}{\left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1\right) \cdot \left(\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) \cdot \left(\left(\alpha + \beta\right) + 2 \cdot 1\right)\right)}
\] |
times-frac [=>]99.8% | \[ \color{blue}{\frac{\beta + 1}{\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1} \cdot \frac{1 + \alpha}{\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) \cdot \left(\left(\alpha + \beta\right) + 2 \cdot 1\right)}}
\] |
Taylor expanded in beta around -inf 99.8%
Simplified99.8%
[Start]99.8% | \[ \frac{\beta + 1}{\alpha + \left(\beta + 3\right)} \cdot \frac{\alpha + 1}{{\beta}^{2} + \left(2 \cdot \left(\beta \cdot \left(2 + \alpha\right)\right) + {\left(2 + \alpha\right)}^{2}\right)}
\] |
|---|---|
unpow2 [=>]99.8% | \[ \frac{\beta + 1}{\alpha + \left(\beta + 3\right)} \cdot \frac{\alpha + 1}{\color{blue}{\beta \cdot \beta} + \left(2 \cdot \left(\beta \cdot \left(2 + \alpha\right)\right) + {\left(2 + \alpha\right)}^{2}\right)}
\] |
+-commutative [=>]99.8% | \[ \frac{\beta + 1}{\alpha + \left(\beta + 3\right)} \cdot \frac{\alpha + 1}{\beta \cdot \beta + \color{blue}{\left({\left(2 + \alpha\right)}^{2} + 2 \cdot \left(\beta \cdot \left(2 + \alpha\right)\right)\right)}}
\] |
unpow2 [=>]99.8% | \[ \frac{\beta + 1}{\alpha + \left(\beta + 3\right)} \cdot \frac{\alpha + 1}{\beta \cdot \beta + \left(\color{blue}{\left(2 + \alpha\right) \cdot \left(2 + \alpha\right)} + 2 \cdot \left(\beta \cdot \left(2 + \alpha\right)\right)\right)}
\] |
associate-*r* [=>]99.8% | \[ \frac{\beta + 1}{\alpha + \left(\beta + 3\right)} \cdot \frac{\alpha + 1}{\beta \cdot \beta + \left(\left(2 + \alpha\right) \cdot \left(2 + \alpha\right) + \color{blue}{\left(2 \cdot \beta\right) \cdot \left(2 + \alpha\right)}\right)}
\] |
distribute-rgt-out [=>]99.8% | \[ \frac{\beta + 1}{\alpha + \left(\beta + 3\right)} \cdot \frac{\alpha + 1}{\beta \cdot \beta + \color{blue}{\left(2 + \alpha\right) \cdot \left(\left(2 + \alpha\right) + 2 \cdot \beta\right)}}
\] |
+-commutative [=>]99.8% | \[ \frac{\beta + 1}{\alpha + \left(\beta + 3\right)} \cdot \frac{\alpha + 1}{\beta \cdot \beta + \color{blue}{\left(\alpha + 2\right)} \cdot \left(\left(2 + \alpha\right) + 2 \cdot \beta\right)}
\] |
+-commutative [=>]99.8% | \[ \frac{\beta + 1}{\alpha + \left(\beta + 3\right)} \cdot \frac{\alpha + 1}{\beta \cdot \beta + \left(\alpha + 2\right) \cdot \left(\color{blue}{\left(\alpha + 2\right)} + 2 \cdot \beta\right)}
\] |
if 1e114 < beta Initial program 79.5%
Taylor expanded in beta around inf 81.5%
Simplified86.0%
[Start]81.5% | \[ \frac{\frac{\left(\frac{1}{\beta} + \left(\frac{\alpha}{\beta} + \left(1 + \alpha\right)\right)\right) - \frac{\left(1 + \alpha\right) \cdot \left(2 + \alpha\right)}{\beta}}{\left(\alpha + \beta\right) + 2 \cdot 1}}{\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1}
\] |
|---|---|
associate--l+ [=>]81.5% | \[ \frac{\frac{\color{blue}{\frac{1}{\beta} + \left(\left(\frac{\alpha}{\beta} + \left(1 + \alpha\right)\right) - \frac{\left(1 + \alpha\right) \cdot \left(2 + \alpha\right)}{\beta}\right)}}{\left(\alpha + \beta\right) + 2 \cdot 1}}{\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1}
\] |
+-commutative [=>]81.5% | \[ \frac{\frac{\frac{1}{\beta} + \left(\color{blue}{\left(\left(1 + \alpha\right) + \frac{\alpha}{\beta}\right)} - \frac{\left(1 + \alpha\right) \cdot \left(2 + \alpha\right)}{\beta}\right)}{\left(\alpha + \beta\right) + 2 \cdot 1}}{\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1}
\] |
associate-/l* [=>]86.0% | \[ \frac{\frac{\frac{1}{\beta} + \left(\left(\left(1 + \alpha\right) + \frac{\alpha}{\beta}\right) - \color{blue}{\frac{1 + \alpha}{\frac{\beta}{2 + \alpha}}}\right)}{\left(\alpha + \beta\right) + 2 \cdot 1}}{\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1}
\] |
+-commutative [=>]86.0% | \[ \frac{\frac{\frac{1}{\beta} + \left(\left(\left(1 + \alpha\right) + \frac{\alpha}{\beta}\right) - \frac{1 + \alpha}{\frac{\beta}{\color{blue}{\alpha + 2}}}\right)}{\left(\alpha + \beta\right) + 2 \cdot 1}}{\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1}
\] |
Final simplification97.2%
| Alternative 1 | |
|---|---|
| Accuracy | 99.7% |
| Cost | 2372 |
| Alternative 2 | |
|---|---|
| Accuracy | 99.6% |
| Cost | 1988 |
| Alternative 3 | |
|---|---|
| Accuracy | 99.6% |
| Cost | 1988 |
| Alternative 4 | |
|---|---|
| Accuracy | 99.5% |
| Cost | 1732 |
| Alternative 5 | |
|---|---|
| Accuracy | 99.6% |
| Cost | 1732 |
| Alternative 6 | |
|---|---|
| Accuracy | 98.6% |
| Cost | 1220 |
| Alternative 7 | |
|---|---|
| Accuracy | 62.8% |
| Cost | 1092 |
| Alternative 8 | |
|---|---|
| Accuracy | 98.6% |
| Cost | 1092 |
| Alternative 9 | |
|---|---|
| Accuracy | 98.6% |
| Cost | 1092 |
| Alternative 10 | |
|---|---|
| Accuracy | 62.6% |
| Cost | 836 |
| Alternative 11 | |
|---|---|
| Accuracy | 62.6% |
| Cost | 708 |
| Alternative 12 | |
|---|---|
| Accuracy | 57.2% |
| Cost | 576 |
| Alternative 13 | |
|---|---|
| Accuracy | 50.9% |
| Cost | 448 |
| Alternative 14 | |
|---|---|
| Accuracy | 53.6% |
| Cost | 448 |
| Alternative 15 | |
|---|---|
| Accuracy | 34.3% |
| Cost | 320 |
| Alternative 16 | |
|---|---|
| Accuracy | 50.7% |
| Cost | 320 |
| Alternative 17 | |
|---|---|
| Accuracy | 51.2% |
| Cost | 320 |
| Alternative 18 | |
|---|---|
| Accuracy | 6.0% |
| Cost | 192 |
| Alternative 19 | |
|---|---|
| Accuracy | 2.2% |
| Cost | 64 |
herbie shell --seed 2023271
(FPCore (alpha beta)
:name "Octave 3.8, jcobi/3"
:precision binary64
:pre (and (> alpha -1.0) (> beta -1.0))
(/ (/ (/ (+ (+ (+ alpha beta) (* beta alpha)) 1.0) (+ (+ alpha beta) (* 2.0 1.0))) (+ (+ alpha beta) (* 2.0 1.0))) (+ (+ (+ alpha beta) (* 2.0 1.0)) 1.0)))