
(FPCore (x) :precision binary64 (/ (- (exp x) (exp (- x))) 2.0))
double code(double x) {
return (exp(x) - exp(-x)) / 2.0;
}
real(8) function code(x)
real(8), intent (in) :: x
code = (exp(x) - exp(-x)) / 2.0d0
end function
public static double code(double x) {
return (Math.exp(x) - Math.exp(-x)) / 2.0;
}
def code(x): return (math.exp(x) - math.exp(-x)) / 2.0
function code(x) return Float64(Float64(exp(x) - exp(Float64(-x))) / 2.0) end
function tmp = code(x) tmp = (exp(x) - exp(-x)) / 2.0; end
code[x_] := N[(N[(N[Exp[x], $MachinePrecision] - N[Exp[(-x)], $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]
\begin{array}{l}
\\
\frac{e^{x} - e^{-x}}{2}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 10 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x) :precision binary64 (/ (- (exp x) (exp (- x))) 2.0))
double code(double x) {
return (exp(x) - exp(-x)) / 2.0;
}
real(8) function code(x)
real(8), intent (in) :: x
code = (exp(x) - exp(-x)) / 2.0d0
end function
public static double code(double x) {
return (Math.exp(x) - Math.exp(-x)) / 2.0;
}
def code(x): return (math.exp(x) - math.exp(-x)) / 2.0
function code(x) return Float64(Float64(exp(x) - exp(Float64(-x))) / 2.0) end
function tmp = code(x) tmp = (exp(x) - exp(-x)) / 2.0; end
code[x_] := N[(N[(N[Exp[x], $MachinePrecision] - N[Exp[(-x)], $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]
\begin{array}{l}
\\
\frac{e^{x} - e^{-x}}{2}
\end{array}
(FPCore (x)
:precision binary64
(let* ((t_0 (- (exp x) (exp (- x)))))
(if (or (<= t_0 (- INFINITY)) (not (<= t_0 0.01)))
(/ t_0 2.0)
(/
(fma
2.0
x
(+
(* 0.3333333333333333 (pow x 3.0))
(* 0.016666666666666666 (pow x 5.0))))
2.0))))
double code(double x) {
double t_0 = exp(x) - exp(-x);
double tmp;
if ((t_0 <= -((double) INFINITY)) || !(t_0 <= 0.01)) {
tmp = t_0 / 2.0;
} else {
tmp = fma(2.0, x, ((0.3333333333333333 * pow(x, 3.0)) + (0.016666666666666666 * pow(x, 5.0)))) / 2.0;
}
return tmp;
}
function code(x) t_0 = Float64(exp(x) - exp(Float64(-x))) tmp = 0.0 if ((t_0 <= Float64(-Inf)) || !(t_0 <= 0.01)) tmp = Float64(t_0 / 2.0); else tmp = Float64(fma(2.0, x, Float64(Float64(0.3333333333333333 * (x ^ 3.0)) + Float64(0.016666666666666666 * (x ^ 5.0)))) / 2.0); end return tmp end
code[x_] := Block[{t$95$0 = N[(N[Exp[x], $MachinePrecision] - N[Exp[(-x)], $MachinePrecision]), $MachinePrecision]}, If[Or[LessEqual[t$95$0, (-Infinity)], N[Not[LessEqual[t$95$0, 0.01]], $MachinePrecision]], N[(t$95$0 / 2.0), $MachinePrecision], N[(N[(2.0 * x + N[(N[(0.3333333333333333 * N[Power[x, 3.0], $MachinePrecision]), $MachinePrecision] + N[(0.016666666666666666 * N[Power[x, 5.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := e^{x} - e^{-x}\\
\mathbf{if}\;t_0 \leq -\infty \lor \neg \left(t_0 \leq 0.01\right):\\
\;\;\;\;\frac{t_0}{2}\\
\mathbf{else}:\\
\;\;\;\;\frac{\mathsf{fma}\left(2, x, 0.3333333333333333 \cdot {x}^{3} + 0.016666666666666666 \cdot {x}^{5}\right)}{2}\\
\end{array}
\end{array}
if (-.f64 (exp.f64 x) (exp.f64 (neg.f64 x))) < -inf.0 or 0.0100000000000000002 < (-.f64 (exp.f64 x) (exp.f64 (neg.f64 x))) Initial program 100.0%
if -inf.0 < (-.f64 (exp.f64 x) (exp.f64 (neg.f64 x))) < 0.0100000000000000002Initial program 9.1%
Taylor expanded in x around 0 100.0%
associate-+r+100.0%
+-commutative100.0%
fma-def100.0%
+-commutative100.0%
fma-def100.0%
Simplified100.0%
fma-udef100.0%
Applied egg-rr100.0%
Final simplification100.0%
(FPCore (x)
:precision binary64
(let* ((t_0 (- (exp x) (exp (- x)))))
(if (or (<= t_0 (- INFINITY)) (not (<= t_0 0.01)))
(/ t_0 2.0)
(/
(+
(* 0.016666666666666666 (pow x 5.0))
(+ (* 0.3333333333333333 (pow x 3.0)) (* x 2.0)))
2.0))))
double code(double x) {
double t_0 = exp(x) - exp(-x);
double tmp;
if ((t_0 <= -((double) INFINITY)) || !(t_0 <= 0.01)) {
tmp = t_0 / 2.0;
} else {
tmp = ((0.016666666666666666 * pow(x, 5.0)) + ((0.3333333333333333 * pow(x, 3.0)) + (x * 2.0))) / 2.0;
}
return tmp;
}
public static double code(double x) {
double t_0 = Math.exp(x) - Math.exp(-x);
double tmp;
if ((t_0 <= -Double.POSITIVE_INFINITY) || !(t_0 <= 0.01)) {
tmp = t_0 / 2.0;
} else {
tmp = ((0.016666666666666666 * Math.pow(x, 5.0)) + ((0.3333333333333333 * Math.pow(x, 3.0)) + (x * 2.0))) / 2.0;
}
return tmp;
}
def code(x): t_0 = math.exp(x) - math.exp(-x) tmp = 0 if (t_0 <= -math.inf) or not (t_0 <= 0.01): tmp = t_0 / 2.0 else: tmp = ((0.016666666666666666 * math.pow(x, 5.0)) + ((0.3333333333333333 * math.pow(x, 3.0)) + (x * 2.0))) / 2.0 return tmp
function code(x) t_0 = Float64(exp(x) - exp(Float64(-x))) tmp = 0.0 if ((t_0 <= Float64(-Inf)) || !(t_0 <= 0.01)) tmp = Float64(t_0 / 2.0); else tmp = Float64(Float64(Float64(0.016666666666666666 * (x ^ 5.0)) + Float64(Float64(0.3333333333333333 * (x ^ 3.0)) + Float64(x * 2.0))) / 2.0); end return tmp end
function tmp_2 = code(x) t_0 = exp(x) - exp(-x); tmp = 0.0; if ((t_0 <= -Inf) || ~((t_0 <= 0.01))) tmp = t_0 / 2.0; else tmp = ((0.016666666666666666 * (x ^ 5.0)) + ((0.3333333333333333 * (x ^ 3.0)) + (x * 2.0))) / 2.0; end tmp_2 = tmp; end
code[x_] := Block[{t$95$0 = N[(N[Exp[x], $MachinePrecision] - N[Exp[(-x)], $MachinePrecision]), $MachinePrecision]}, If[Or[LessEqual[t$95$0, (-Infinity)], N[Not[LessEqual[t$95$0, 0.01]], $MachinePrecision]], N[(t$95$0 / 2.0), $MachinePrecision], N[(N[(N[(0.016666666666666666 * N[Power[x, 5.0], $MachinePrecision]), $MachinePrecision] + N[(N[(0.3333333333333333 * N[Power[x, 3.0], $MachinePrecision]), $MachinePrecision] + N[(x * 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := e^{x} - e^{-x}\\
\mathbf{if}\;t_0 \leq -\infty \lor \neg \left(t_0 \leq 0.01\right):\\
\;\;\;\;\frac{t_0}{2}\\
\mathbf{else}:\\
\;\;\;\;\frac{0.016666666666666666 \cdot {x}^{5} + \left(0.3333333333333333 \cdot {x}^{3} + x \cdot 2\right)}{2}\\
\end{array}
\end{array}
if (-.f64 (exp.f64 x) (exp.f64 (neg.f64 x))) < -inf.0 or 0.0100000000000000002 < (-.f64 (exp.f64 x) (exp.f64 (neg.f64 x))) Initial program 100.0%
if -inf.0 < (-.f64 (exp.f64 x) (exp.f64 (neg.f64 x))) < 0.0100000000000000002Initial program 9.1%
Taylor expanded in x around 0 100.0%
Final simplification100.0%
(FPCore (x)
:precision binary64
(let* ((t_0 (- (exp x) (exp (- x)))))
(if (or (<= t_0 (- INFINITY)) (not (<= t_0 2e-8)))
(/ t_0 2.0)
(/ (* x (+ 2.0 (* x (* x 0.3333333333333333)))) 2.0))))
double code(double x) {
double t_0 = exp(x) - exp(-x);
double tmp;
if ((t_0 <= -((double) INFINITY)) || !(t_0 <= 2e-8)) {
tmp = t_0 / 2.0;
} else {
tmp = (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0;
}
return tmp;
}
public static double code(double x) {
double t_0 = Math.exp(x) - Math.exp(-x);
double tmp;
if ((t_0 <= -Double.POSITIVE_INFINITY) || !(t_0 <= 2e-8)) {
tmp = t_0 / 2.0;
} else {
tmp = (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0;
}
return tmp;
}
def code(x): t_0 = math.exp(x) - math.exp(-x) tmp = 0 if (t_0 <= -math.inf) or not (t_0 <= 2e-8): tmp = t_0 / 2.0 else: tmp = (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0 return tmp
function code(x) t_0 = Float64(exp(x) - exp(Float64(-x))) tmp = 0.0 if ((t_0 <= Float64(-Inf)) || !(t_0 <= 2e-8)) tmp = Float64(t_0 / 2.0); else tmp = Float64(Float64(x * Float64(2.0 + Float64(x * Float64(x * 0.3333333333333333)))) / 2.0); end return tmp end
function tmp_2 = code(x) t_0 = exp(x) - exp(-x); tmp = 0.0; if ((t_0 <= -Inf) || ~((t_0 <= 2e-8))) tmp = t_0 / 2.0; else tmp = (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0; end tmp_2 = tmp; end
code[x_] := Block[{t$95$0 = N[(N[Exp[x], $MachinePrecision] - N[Exp[(-x)], $MachinePrecision]), $MachinePrecision]}, If[Or[LessEqual[t$95$0, (-Infinity)], N[Not[LessEqual[t$95$0, 2e-8]], $MachinePrecision]], N[(t$95$0 / 2.0), $MachinePrecision], N[(N[(x * N[(2.0 + N[(x * N[(x * 0.3333333333333333), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := e^{x} - e^{-x}\\
\mathbf{if}\;t_0 \leq -\infty \lor \neg \left(t_0 \leq 2 \cdot 10^{-8}\right):\\
\;\;\;\;\frac{t_0}{2}\\
\mathbf{else}:\\
\;\;\;\;\frac{x \cdot \left(2 + x \cdot \left(x \cdot 0.3333333333333333\right)\right)}{2}\\
\end{array}
\end{array}
if (-.f64 (exp.f64 x) (exp.f64 (neg.f64 x))) < -inf.0 or 2e-8 < (-.f64 (exp.f64 x) (exp.f64 (neg.f64 x))) Initial program 99.9%
if -inf.0 < (-.f64 (exp.f64 x) (exp.f64 (neg.f64 x))) < 2e-8Initial program 8.5%
Taylor expanded in x around 0 100.0%
unpow3100.0%
associate-*r*100.0%
distribute-rgt-out100.0%
*-commutative100.0%
associate-*l*100.0%
fma-def100.0%
Simplified100.0%
fma-udef100.0%
*-commutative100.0%
Applied egg-rr100.0%
Final simplification100.0%
(FPCore (x)
:precision binary64
(if (<= x -5.0)
(/ (* 0.016666666666666666 (pow x 5.0)) 2.0)
(if (<= x 2.0)
(/ (* x (+ 2.0 (* x (* x 0.3333333333333333)))) 2.0)
(sqrt (* (pow x 6.0) 0.027777777777777776)))))
double code(double x) {
double tmp;
if (x <= -5.0) {
tmp = (0.016666666666666666 * pow(x, 5.0)) / 2.0;
} else if (x <= 2.0) {
tmp = (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0;
} else {
tmp = sqrt((pow(x, 6.0) * 0.027777777777777776));
}
return tmp;
}
real(8) function code(x)
real(8), intent (in) :: x
real(8) :: tmp
if (x <= (-5.0d0)) then
tmp = (0.016666666666666666d0 * (x ** 5.0d0)) / 2.0d0
else if (x <= 2.0d0) then
tmp = (x * (2.0d0 + (x * (x * 0.3333333333333333d0)))) / 2.0d0
else
tmp = sqrt(((x ** 6.0d0) * 0.027777777777777776d0))
end if
code = tmp
end function
public static double code(double x) {
double tmp;
if (x <= -5.0) {
tmp = (0.016666666666666666 * Math.pow(x, 5.0)) / 2.0;
} else if (x <= 2.0) {
tmp = (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0;
} else {
tmp = Math.sqrt((Math.pow(x, 6.0) * 0.027777777777777776));
}
return tmp;
}
def code(x): tmp = 0 if x <= -5.0: tmp = (0.016666666666666666 * math.pow(x, 5.0)) / 2.0 elif x <= 2.0: tmp = (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0 else: tmp = math.sqrt((math.pow(x, 6.0) * 0.027777777777777776)) return tmp
function code(x) tmp = 0.0 if (x <= -5.0) tmp = Float64(Float64(0.016666666666666666 * (x ^ 5.0)) / 2.0); elseif (x <= 2.0) tmp = Float64(Float64(x * Float64(2.0 + Float64(x * Float64(x * 0.3333333333333333)))) / 2.0); else tmp = sqrt(Float64((x ^ 6.0) * 0.027777777777777776)); end return tmp end
function tmp_2 = code(x) tmp = 0.0; if (x <= -5.0) tmp = (0.016666666666666666 * (x ^ 5.0)) / 2.0; elseif (x <= 2.0) tmp = (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0; else tmp = sqrt(((x ^ 6.0) * 0.027777777777777776)); end tmp_2 = tmp; end
code[x_] := If[LessEqual[x, -5.0], N[(N[(0.016666666666666666 * N[Power[x, 5.0], $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision], If[LessEqual[x, 2.0], N[(N[(x * N[(2.0 + N[(x * N[(x * 0.3333333333333333), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision], N[Sqrt[N[(N[Power[x, 6.0], $MachinePrecision] * 0.027777777777777776), $MachinePrecision]], $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -5:\\
\;\;\;\;\frac{0.016666666666666666 \cdot {x}^{5}}{2}\\
\mathbf{elif}\;x \leq 2:\\
\;\;\;\;\frac{x \cdot \left(2 + x \cdot \left(x \cdot 0.3333333333333333\right)\right)}{2}\\
\mathbf{else}:\\
\;\;\;\;\sqrt{{x}^{6} \cdot 0.027777777777777776}\\
\end{array}
\end{array}
if x < -5Initial program 100.0%
Taylor expanded in x around 0 80.9%
Taylor expanded in x around inf 80.9%
if -5 < x < 2Initial program 9.8%
Taylor expanded in x around 0 99.3%
unpow399.3%
associate-*r*99.3%
distribute-rgt-out99.3%
*-commutative99.3%
associate-*l*99.3%
fma-def99.3%
Simplified99.3%
fma-udef99.3%
*-commutative99.3%
Applied egg-rr99.3%
if 2 < x Initial program 100.0%
Taylor expanded in x around 0 74.0%
unpow374.0%
associate-*r*74.0%
distribute-rgt-out74.0%
*-commutative74.0%
associate-*l*74.0%
fma-def74.0%
Simplified74.0%
Taylor expanded in x around inf 74.0%
unpow274.0%
Simplified74.0%
add-sqr-sqrt74.0%
sqrt-unprod84.5%
div-inv84.5%
div-inv84.5%
swap-sqr84.5%
pow284.5%
*-commutative84.5%
associate-*r*84.5%
unpow384.5%
pow284.5%
swap-sqr84.5%
metadata-eval84.5%
pow-prod-up84.5%
metadata-eval84.5%
metadata-eval84.5%
metadata-eval84.5%
metadata-eval84.5%
Applied egg-rr84.5%
*-commutative84.5%
associate-*l*84.5%
metadata-eval84.5%
Simplified84.5%
Final simplification91.1%
(FPCore (x) :precision binary64 (if (<= x -5.0) (/ (* 0.016666666666666666 (pow x 5.0)) 2.0) (/ (* x (+ 2.0 (* x (* x 0.3333333333333333)))) 2.0)))
double code(double x) {
double tmp;
if (x <= -5.0) {
tmp = (0.016666666666666666 * pow(x, 5.0)) / 2.0;
} else {
tmp = (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0;
}
return tmp;
}
real(8) function code(x)
real(8), intent (in) :: x
real(8) :: tmp
if (x <= (-5.0d0)) then
tmp = (0.016666666666666666d0 * (x ** 5.0d0)) / 2.0d0
else
tmp = (x * (2.0d0 + (x * (x * 0.3333333333333333d0)))) / 2.0d0
end if
code = tmp
end function
public static double code(double x) {
double tmp;
if (x <= -5.0) {
tmp = (0.016666666666666666 * Math.pow(x, 5.0)) / 2.0;
} else {
tmp = (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0;
}
return tmp;
}
def code(x): tmp = 0 if x <= -5.0: tmp = (0.016666666666666666 * math.pow(x, 5.0)) / 2.0 else: tmp = (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0 return tmp
function code(x) tmp = 0.0 if (x <= -5.0) tmp = Float64(Float64(0.016666666666666666 * (x ^ 5.0)) / 2.0); else tmp = Float64(Float64(x * Float64(2.0 + Float64(x * Float64(x * 0.3333333333333333)))) / 2.0); end return tmp end
function tmp_2 = code(x) tmp = 0.0; if (x <= -5.0) tmp = (0.016666666666666666 * (x ^ 5.0)) / 2.0; else tmp = (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0; end tmp_2 = tmp; end
code[x_] := If[LessEqual[x, -5.0], N[(N[(0.016666666666666666 * N[Power[x, 5.0], $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision], N[(N[(x * N[(2.0 + N[(x * N[(x * 0.3333333333333333), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -5:\\
\;\;\;\;\frac{0.016666666666666666 \cdot {x}^{5}}{2}\\
\mathbf{else}:\\
\;\;\;\;\frac{x \cdot \left(2 + x \cdot \left(x \cdot 0.3333333333333333\right)\right)}{2}\\
\end{array}
\end{array}
if x < -5Initial program 100.0%
Taylor expanded in x around 0 80.9%
Taylor expanded in x around inf 80.9%
if -5 < x Initial program 38.9%
Taylor expanded in x around 0 91.1%
unpow391.1%
associate-*r*91.1%
distribute-rgt-out91.1%
*-commutative91.1%
associate-*l*91.1%
fma-def91.1%
Simplified91.1%
fma-udef91.1%
*-commutative91.1%
Applied egg-rr91.1%
Final simplification88.6%
(FPCore (x) :precision binary64 (if (or (<= x -2.4) (not (<= x 2.4))) (* x (/ 1.0 (/ 6.0 (* x x)))) (/ (* x 2.0) 2.0)))
double code(double x) {
double tmp;
if ((x <= -2.4) || !(x <= 2.4)) {
tmp = x * (1.0 / (6.0 / (x * x)));
} else {
tmp = (x * 2.0) / 2.0;
}
return tmp;
}
real(8) function code(x)
real(8), intent (in) :: x
real(8) :: tmp
if ((x <= (-2.4d0)) .or. (.not. (x <= 2.4d0))) then
tmp = x * (1.0d0 / (6.0d0 / (x * x)))
else
tmp = (x * 2.0d0) / 2.0d0
end if
code = tmp
end function
public static double code(double x) {
double tmp;
if ((x <= -2.4) || !(x <= 2.4)) {
tmp = x * (1.0 / (6.0 / (x * x)));
} else {
tmp = (x * 2.0) / 2.0;
}
return tmp;
}
def code(x): tmp = 0 if (x <= -2.4) or not (x <= 2.4): tmp = x * (1.0 / (6.0 / (x * x))) else: tmp = (x * 2.0) / 2.0 return tmp
function code(x) tmp = 0.0 if ((x <= -2.4) || !(x <= 2.4)) tmp = Float64(x * Float64(1.0 / Float64(6.0 / Float64(x * x)))); else tmp = Float64(Float64(x * 2.0) / 2.0); end return tmp end
function tmp_2 = code(x) tmp = 0.0; if ((x <= -2.4) || ~((x <= 2.4))) tmp = x * (1.0 / (6.0 / (x * x))); else tmp = (x * 2.0) / 2.0; end tmp_2 = tmp; end
code[x_] := If[Or[LessEqual[x, -2.4], N[Not[LessEqual[x, 2.4]], $MachinePrecision]], N[(x * N[(1.0 / N[(6.0 / N[(x * x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[(x * 2.0), $MachinePrecision] / 2.0), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -2.4 \lor \neg \left(x \leq 2.4\right):\\
\;\;\;\;x \cdot \frac{1}{\frac{6}{x \cdot x}}\\
\mathbf{else}:\\
\;\;\;\;\frac{x \cdot 2}{2}\\
\end{array}
\end{array}
if x < -2.39999999999999991 or 2.39999999999999991 < x Initial program 100.0%
Taylor expanded in x around 0 70.7%
unpow370.7%
associate-*r*70.7%
distribute-rgt-out70.7%
*-commutative70.7%
associate-*l*70.7%
fma-def70.7%
Simplified70.7%
Taylor expanded in x around inf 70.7%
unpow270.7%
Simplified70.7%
associate-/l*70.7%
div-inv70.7%
associate-/r*70.7%
metadata-eval70.7%
Applied egg-rr70.7%
if -2.39999999999999991 < x < 2.39999999999999991Initial program 9.8%
Taylor expanded in x around 0 98.7%
Final simplification84.9%
(FPCore (x) :precision binary64 (/ (* x (+ 2.0 (* x (* x 0.3333333333333333)))) 2.0))
double code(double x) {
return (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0;
}
real(8) function code(x)
real(8), intent (in) :: x
code = (x * (2.0d0 + (x * (x * 0.3333333333333333d0)))) / 2.0d0
end function
public static double code(double x) {
return (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0;
}
def code(x): return (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0
function code(x) return Float64(Float64(x * Float64(2.0 + Float64(x * Float64(x * 0.3333333333333333)))) / 2.0) end
function tmp = code(x) tmp = (x * (2.0 + (x * (x * 0.3333333333333333)))) / 2.0; end
code[x_] := N[(N[(x * N[(2.0 + N[(x * N[(x * 0.3333333333333333), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]
\begin{array}{l}
\\
\frac{x \cdot \left(2 + x \cdot \left(x \cdot 0.3333333333333333\right)\right)}{2}
\end{array}
Initial program 54.2%
Taylor expanded in x around 0 85.2%
unpow385.2%
associate-*r*85.2%
distribute-rgt-out85.2%
*-commutative85.2%
associate-*l*85.2%
fma-def85.2%
Simplified85.2%
fma-udef85.2%
*-commutative85.2%
Applied egg-rr85.2%
Final simplification85.2%
(FPCore (x) :precision binary64 (/ (* x 2.0) 2.0))
double code(double x) {
return (x * 2.0) / 2.0;
}
real(8) function code(x)
real(8), intent (in) :: x
code = (x * 2.0d0) / 2.0d0
end function
public static double code(double x) {
return (x * 2.0) / 2.0;
}
def code(x): return (x * 2.0) / 2.0
function code(x) return Float64(Float64(x * 2.0) / 2.0) end
function tmp = code(x) tmp = (x * 2.0) / 2.0; end
code[x_] := N[(N[(x * 2.0), $MachinePrecision] / 2.0), $MachinePrecision]
\begin{array}{l}
\\
\frac{x \cdot 2}{2}
\end{array}
Initial program 54.2%
Taylor expanded in x around 0 52.8%
Final simplification52.8%
(FPCore (x) :precision binary64 -1.0)
double code(double x) {
return -1.0;
}
real(8) function code(x)
real(8), intent (in) :: x
code = -1.0d0
end function
public static double code(double x) {
return -1.0;
}
def code(x): return -1.0
function code(x) return -1.0 end
function tmp = code(x) tmp = -1.0; end
code[x_] := -1.0
\begin{array}{l}
\\
-1
\end{array}
Initial program 54.2%
Applied egg-rr2.9%
Final simplification2.9%
(FPCore (x) :precision binary64 0.0)
double code(double x) {
return 0.0;
}
real(8) function code(x)
real(8), intent (in) :: x
code = 0.0d0
end function
public static double code(double x) {
return 0.0;
}
def code(x): return 0.0
function code(x) return 0.0 end
function tmp = code(x) tmp = 0.0; end
code[x_] := 0.0
\begin{array}{l}
\\
0
\end{array}
Initial program 54.2%
Applied egg-rr3.5%
Final simplification3.5%
herbie shell --seed 2023279
(FPCore (x)
:name "Hyperbolic sine"
:precision binary64
(/ (- (exp x) (exp (- x))) 2.0))