
(FPCore (x) :precision binary64 (* (/ 1.0 2.0) (log (/ (+ 1.0 x) (- 1.0 x)))))
double code(double x) {
return (1.0 / 2.0) * log(((1.0 + x) / (1.0 - x)));
}
real(8) function code(x)
real(8), intent (in) :: x
code = (1.0d0 / 2.0d0) * log(((1.0d0 + x) / (1.0d0 - x)))
end function
public static double code(double x) {
return (1.0 / 2.0) * Math.log(((1.0 + x) / (1.0 - x)));
}
def code(x): return (1.0 / 2.0) * math.log(((1.0 + x) / (1.0 - x)))
function code(x) return Float64(Float64(1.0 / 2.0) * log(Float64(Float64(1.0 + x) / Float64(1.0 - x)))) end
function tmp = code(x) tmp = (1.0 / 2.0) * log(((1.0 + x) / (1.0 - x))); end
code[x_] := N[(N[(1.0 / 2.0), $MachinePrecision] * N[Log[N[(N[(1.0 + x), $MachinePrecision] / N[(1.0 - x), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{1}{2} \cdot \log \left(\frac{1 + x}{1 - x}\right)
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 9 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x) :precision binary64 (* (/ 1.0 2.0) (log (/ (+ 1.0 x) (- 1.0 x)))))
double code(double x) {
return (1.0 / 2.0) * log(((1.0 + x) / (1.0 - x)));
}
real(8) function code(x)
real(8), intent (in) :: x
code = (1.0d0 / 2.0d0) * log(((1.0d0 + x) / (1.0d0 - x)))
end function
public static double code(double x) {
return (1.0 / 2.0) * Math.log(((1.0 + x) / (1.0 - x)));
}
def code(x): return (1.0 / 2.0) * math.log(((1.0 + x) / (1.0 - x)))
function code(x) return Float64(Float64(1.0 / 2.0) * log(Float64(Float64(1.0 + x) / Float64(1.0 - x)))) end
function tmp = code(x) tmp = (1.0 / 2.0) * log(((1.0 + x) / (1.0 - x))); end
code[x_] := N[(N[(1.0 / 2.0), $MachinePrecision] * N[Log[N[(N[(1.0 + x), $MachinePrecision] / N[(1.0 - x), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{1}{2} \cdot \log \left(\frac{1 + x}{1 - x}\right)
\end{array}
(FPCore (x) :precision binary64 (* 0.5 (- (log1p x) (log1p (- 0.0 x)))))
double code(double x) {
return 0.5 * (log1p(x) - log1p((0.0 - x)));
}
public static double code(double x) {
return 0.5 * (Math.log1p(x) - Math.log1p((0.0 - x)));
}
def code(x): return 0.5 * (math.log1p(x) - math.log1p((0.0 - x)))
function code(x) return Float64(0.5 * Float64(log1p(x) - log1p(Float64(0.0 - x)))) end
code[x_] := N[(0.5 * N[(N[Log[1 + x], $MachinePrecision] - N[Log[1 + N[(0.0 - x), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
0.5 \cdot \left(\mathsf{log1p}\left(x\right) - \mathsf{log1p}\left(0 - x\right)\right)
\end{array}
Initial program 8.7%
*-lowering-*.f64N/A
metadata-evalN/A
log-lowering-log.f64N/A
/-lowering-/.f64N/A
+-lowering-+.f64N/A
--lowering--.f648.7%
Simplified8.7%
log-divN/A
--lowering--.f64N/A
log1p-defineN/A
log1p-lowering-log1p.f64N/A
log-lowering-log.f64N/A
--lowering--.f6421.2%
Applied egg-rr21.2%
sub-negN/A
log1p-defineN/A
log1p-lowering-log1p.f64N/A
neg-sub0N/A
--lowering--.f64100.0%
Applied egg-rr100.0%
(FPCore (x)
:precision binary64
(let* ((t_0
(*
(* x x)
(+
0.3333333333333333
(* x (* x (+ 0.2 (* x (* x 0.14285714285714285)))))))))
(/
(*
x
(+
1.0
(*
t_0
(*
(* (* x x) (* x x))
(+ 0.1111111111111111 (* (* x x) 0.13333333333333333))))))
(+
1.0
(*
t_0
(+
(*
(* x x)
(+
0.3333333333333333
(*
x
(/
(* x (- 0.04 (* (* x (* x (* x x))) 0.02040816326530612)))
(+ 0.2 (* (* x x) 0.14285714285714285))))))
-1.0))))))
double code(double x) {
double t_0 = (x * x) * (0.3333333333333333 + (x * (x * (0.2 + (x * (x * 0.14285714285714285))))));
return (x * (1.0 + (t_0 * (((x * x) * (x * x)) * (0.1111111111111111 + ((x * x) * 0.13333333333333333)))))) / (1.0 + (t_0 * (((x * x) * (0.3333333333333333 + (x * ((x * (0.04 - ((x * (x * (x * x))) * 0.02040816326530612))) / (0.2 + ((x * x) * 0.14285714285714285)))))) + -1.0)));
}
real(8) function code(x)
real(8), intent (in) :: x
real(8) :: t_0
t_0 = (x * x) * (0.3333333333333333d0 + (x * (x * (0.2d0 + (x * (x * 0.14285714285714285d0))))))
code = (x * (1.0d0 + (t_0 * (((x * x) * (x * x)) * (0.1111111111111111d0 + ((x * x) * 0.13333333333333333d0)))))) / (1.0d0 + (t_0 * (((x * x) * (0.3333333333333333d0 + (x * ((x * (0.04d0 - ((x * (x * (x * x))) * 0.02040816326530612d0))) / (0.2d0 + ((x * x) * 0.14285714285714285d0)))))) + (-1.0d0))))
end function
public static double code(double x) {
double t_0 = (x * x) * (0.3333333333333333 + (x * (x * (0.2 + (x * (x * 0.14285714285714285))))));
return (x * (1.0 + (t_0 * (((x * x) * (x * x)) * (0.1111111111111111 + ((x * x) * 0.13333333333333333)))))) / (1.0 + (t_0 * (((x * x) * (0.3333333333333333 + (x * ((x * (0.04 - ((x * (x * (x * x))) * 0.02040816326530612))) / (0.2 + ((x * x) * 0.14285714285714285)))))) + -1.0)));
}
def code(x): t_0 = (x * x) * (0.3333333333333333 + (x * (x * (0.2 + (x * (x * 0.14285714285714285)))))) return (x * (1.0 + (t_0 * (((x * x) * (x * x)) * (0.1111111111111111 + ((x * x) * 0.13333333333333333)))))) / (1.0 + (t_0 * (((x * x) * (0.3333333333333333 + (x * ((x * (0.04 - ((x * (x * (x * x))) * 0.02040816326530612))) / (0.2 + ((x * x) * 0.14285714285714285)))))) + -1.0)))
function code(x) t_0 = Float64(Float64(x * x) * Float64(0.3333333333333333 + Float64(x * Float64(x * Float64(0.2 + Float64(x * Float64(x * 0.14285714285714285))))))) return Float64(Float64(x * Float64(1.0 + Float64(t_0 * Float64(Float64(Float64(x * x) * Float64(x * x)) * Float64(0.1111111111111111 + Float64(Float64(x * x) * 0.13333333333333333)))))) / Float64(1.0 + Float64(t_0 * Float64(Float64(Float64(x * x) * Float64(0.3333333333333333 + Float64(x * Float64(Float64(x * Float64(0.04 - Float64(Float64(x * Float64(x * Float64(x * x))) * 0.02040816326530612))) / Float64(0.2 + Float64(Float64(x * x) * 0.14285714285714285)))))) + -1.0)))) end
function tmp = code(x) t_0 = (x * x) * (0.3333333333333333 + (x * (x * (0.2 + (x * (x * 0.14285714285714285)))))); tmp = (x * (1.0 + (t_0 * (((x * x) * (x * x)) * (0.1111111111111111 + ((x * x) * 0.13333333333333333)))))) / (1.0 + (t_0 * (((x * x) * (0.3333333333333333 + (x * ((x * (0.04 - ((x * (x * (x * x))) * 0.02040816326530612))) / (0.2 + ((x * x) * 0.14285714285714285)))))) + -1.0))); end
code[x_] := Block[{t$95$0 = N[(N[(x * x), $MachinePrecision] * N[(0.3333333333333333 + N[(x * N[(x * N[(0.2 + N[(x * N[(x * 0.14285714285714285), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, N[(N[(x * N[(1.0 + N[(t$95$0 * N[(N[(N[(x * x), $MachinePrecision] * N[(x * x), $MachinePrecision]), $MachinePrecision] * N[(0.1111111111111111 + N[(N[(x * x), $MachinePrecision] * 0.13333333333333333), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / N[(1.0 + N[(t$95$0 * N[(N[(N[(x * x), $MachinePrecision] * N[(0.3333333333333333 + N[(x * N[(N[(x * N[(0.04 - N[(N[(x * N[(x * N[(x * x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * 0.02040816326530612), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / N[(0.2 + N[(N[(x * x), $MachinePrecision] * 0.14285714285714285), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + -1.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \left(x \cdot x\right) \cdot \left(0.3333333333333333 + x \cdot \left(x \cdot \left(0.2 + x \cdot \left(x \cdot 0.14285714285714285\right)\right)\right)\right)\\
\frac{x \cdot \left(1 + t\_0 \cdot \left(\left(\left(x \cdot x\right) \cdot \left(x \cdot x\right)\right) \cdot \left(0.1111111111111111 + \left(x \cdot x\right) \cdot 0.13333333333333333\right)\right)\right)}{1 + t\_0 \cdot \left(\left(x \cdot x\right) \cdot \left(0.3333333333333333 + x \cdot \frac{x \cdot \left(0.04 - \left(x \cdot \left(x \cdot \left(x \cdot x\right)\right)\right) \cdot 0.02040816326530612\right)}{0.2 + \left(x \cdot x\right) \cdot 0.14285714285714285}\right) + -1\right)}
\end{array}
\end{array}
Initial program 8.7%
*-lowering-*.f64N/A
metadata-evalN/A
log-lowering-log.f64N/A
/-lowering-/.f64N/A
+-lowering-+.f64N/A
--lowering--.f648.7%
Simplified8.7%
Taylor expanded in x around 0
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
unpow2N/A
associate-*l*N/A
*-lowering-*.f64N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-commutativeN/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f6499.9%
Simplified99.9%
*-commutativeN/A
flip3-+N/A
associate-*l/N/A
/-lowering-/.f64N/A
Applied egg-rr100.0%
Taylor expanded in x around 0
*-lowering-*.f64N/A
metadata-evalN/A
pow-sqrN/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-commutativeN/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64100.0%
Simplified100.0%
Applied egg-rr100.0%
Final simplification100.0%
(FPCore (x)
:precision binary64
(let* ((t_0
(*
(* x x)
(+
0.3333333333333333
(* x (* x (+ 0.2 (* x (* x 0.14285714285714285)))))))))
(/
(*
x
(+
1.0
(*
t_0
(*
(* (* x x) (* x x))
(+ 0.1111111111111111 (* (* x x) 0.13333333333333333))))))
(+
1.0
(* t_0 (+ (* (* x x) (+ 0.3333333333333333 (* x (* x 0.2)))) -1.0))))))
double code(double x) {
double t_0 = (x * x) * (0.3333333333333333 + (x * (x * (0.2 + (x * (x * 0.14285714285714285))))));
return (x * (1.0 + (t_0 * (((x * x) * (x * x)) * (0.1111111111111111 + ((x * x) * 0.13333333333333333)))))) / (1.0 + (t_0 * (((x * x) * (0.3333333333333333 + (x * (x * 0.2)))) + -1.0)));
}
real(8) function code(x)
real(8), intent (in) :: x
real(8) :: t_0
t_0 = (x * x) * (0.3333333333333333d0 + (x * (x * (0.2d0 + (x * (x * 0.14285714285714285d0))))))
code = (x * (1.0d0 + (t_0 * (((x * x) * (x * x)) * (0.1111111111111111d0 + ((x * x) * 0.13333333333333333d0)))))) / (1.0d0 + (t_0 * (((x * x) * (0.3333333333333333d0 + (x * (x * 0.2d0)))) + (-1.0d0))))
end function
public static double code(double x) {
double t_0 = (x * x) * (0.3333333333333333 + (x * (x * (0.2 + (x * (x * 0.14285714285714285))))));
return (x * (1.0 + (t_0 * (((x * x) * (x * x)) * (0.1111111111111111 + ((x * x) * 0.13333333333333333)))))) / (1.0 + (t_0 * (((x * x) * (0.3333333333333333 + (x * (x * 0.2)))) + -1.0)));
}
def code(x): t_0 = (x * x) * (0.3333333333333333 + (x * (x * (0.2 + (x * (x * 0.14285714285714285)))))) return (x * (1.0 + (t_0 * (((x * x) * (x * x)) * (0.1111111111111111 + ((x * x) * 0.13333333333333333)))))) / (1.0 + (t_0 * (((x * x) * (0.3333333333333333 + (x * (x * 0.2)))) + -1.0)))
function code(x) t_0 = Float64(Float64(x * x) * Float64(0.3333333333333333 + Float64(x * Float64(x * Float64(0.2 + Float64(x * Float64(x * 0.14285714285714285))))))) return Float64(Float64(x * Float64(1.0 + Float64(t_0 * Float64(Float64(Float64(x * x) * Float64(x * x)) * Float64(0.1111111111111111 + Float64(Float64(x * x) * 0.13333333333333333)))))) / Float64(1.0 + Float64(t_0 * Float64(Float64(Float64(x * x) * Float64(0.3333333333333333 + Float64(x * Float64(x * 0.2)))) + -1.0)))) end
function tmp = code(x) t_0 = (x * x) * (0.3333333333333333 + (x * (x * (0.2 + (x * (x * 0.14285714285714285)))))); tmp = (x * (1.0 + (t_0 * (((x * x) * (x * x)) * (0.1111111111111111 + ((x * x) * 0.13333333333333333)))))) / (1.0 + (t_0 * (((x * x) * (0.3333333333333333 + (x * (x * 0.2)))) + -1.0))); end
code[x_] := Block[{t$95$0 = N[(N[(x * x), $MachinePrecision] * N[(0.3333333333333333 + N[(x * N[(x * N[(0.2 + N[(x * N[(x * 0.14285714285714285), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, N[(N[(x * N[(1.0 + N[(t$95$0 * N[(N[(N[(x * x), $MachinePrecision] * N[(x * x), $MachinePrecision]), $MachinePrecision] * N[(0.1111111111111111 + N[(N[(x * x), $MachinePrecision] * 0.13333333333333333), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / N[(1.0 + N[(t$95$0 * N[(N[(N[(x * x), $MachinePrecision] * N[(0.3333333333333333 + N[(x * N[(x * 0.2), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + -1.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \left(x \cdot x\right) \cdot \left(0.3333333333333333 + x \cdot \left(x \cdot \left(0.2 + x \cdot \left(x \cdot 0.14285714285714285\right)\right)\right)\right)\\
\frac{x \cdot \left(1 + t\_0 \cdot \left(\left(\left(x \cdot x\right) \cdot \left(x \cdot x\right)\right) \cdot \left(0.1111111111111111 + \left(x \cdot x\right) \cdot 0.13333333333333333\right)\right)\right)}{1 + t\_0 \cdot \left(\left(x \cdot x\right) \cdot \left(0.3333333333333333 + x \cdot \left(x \cdot 0.2\right)\right) + -1\right)}
\end{array}
\end{array}
Initial program 8.7%
*-lowering-*.f64N/A
metadata-evalN/A
log-lowering-log.f64N/A
/-lowering-/.f64N/A
+-lowering-+.f64N/A
--lowering--.f648.7%
Simplified8.7%
Taylor expanded in x around 0
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
unpow2N/A
associate-*l*N/A
*-lowering-*.f64N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-commutativeN/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f6499.9%
Simplified99.9%
*-commutativeN/A
flip3-+N/A
associate-*l/N/A
/-lowering-/.f64N/A
Applied egg-rr100.0%
Taylor expanded in x around 0
*-lowering-*.f64N/A
metadata-evalN/A
pow-sqrN/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-commutativeN/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64100.0%
Simplified100.0%
Taylor expanded in x around 0
*-commutativeN/A
*-lowering-*.f64100.0%
Simplified100.0%
Final simplification100.0%
(FPCore (x)
:precision binary64
(*
x
(+
1.0
(*
(* x x)
(+
0.3333333333333333
(* x (* x (+ 0.2 (* (* x x) 0.14285714285714285)))))))))
double code(double x) {
return x * (1.0 + ((x * x) * (0.3333333333333333 + (x * (x * (0.2 + ((x * x) * 0.14285714285714285)))))));
}
real(8) function code(x)
real(8), intent (in) :: x
code = x * (1.0d0 + ((x * x) * (0.3333333333333333d0 + (x * (x * (0.2d0 + ((x * x) * 0.14285714285714285d0)))))))
end function
public static double code(double x) {
return x * (1.0 + ((x * x) * (0.3333333333333333 + (x * (x * (0.2 + ((x * x) * 0.14285714285714285)))))));
}
def code(x): return x * (1.0 + ((x * x) * (0.3333333333333333 + (x * (x * (0.2 + ((x * x) * 0.14285714285714285)))))))
function code(x) return Float64(x * Float64(1.0 + Float64(Float64(x * x) * Float64(0.3333333333333333 + Float64(x * Float64(x * Float64(0.2 + Float64(Float64(x * x) * 0.14285714285714285)))))))) end
function tmp = code(x) tmp = x * (1.0 + ((x * x) * (0.3333333333333333 + (x * (x * (0.2 + ((x * x) * 0.14285714285714285))))))); end
code[x_] := N[(x * N[(1.0 + N[(N[(x * x), $MachinePrecision] * N[(0.3333333333333333 + N[(x * N[(x * N[(0.2 + N[(N[(x * x), $MachinePrecision] * 0.14285714285714285), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x \cdot \left(1 + \left(x \cdot x\right) \cdot \left(0.3333333333333333 + x \cdot \left(x \cdot \left(0.2 + \left(x \cdot x\right) \cdot 0.14285714285714285\right)\right)\right)\right)
\end{array}
Initial program 8.7%
*-lowering-*.f64N/A
metadata-evalN/A
log-lowering-log.f64N/A
/-lowering-/.f64N/A
+-lowering-+.f64N/A
--lowering--.f648.7%
Simplified8.7%
Taylor expanded in x around 0
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
unpow2N/A
associate-*l*N/A
*-lowering-*.f64N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-commutativeN/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f6499.9%
Simplified99.9%
(FPCore (x) :precision binary64 (+ x (* (* x x) (* x (+ 0.3333333333333333 (* (* x x) 0.2))))))
double code(double x) {
return x + ((x * x) * (x * (0.3333333333333333 + ((x * x) * 0.2))));
}
real(8) function code(x)
real(8), intent (in) :: x
code = x + ((x * x) * (x * (0.3333333333333333d0 + ((x * x) * 0.2d0))))
end function
public static double code(double x) {
return x + ((x * x) * (x * (0.3333333333333333 + ((x * x) * 0.2))));
}
def code(x): return x + ((x * x) * (x * (0.3333333333333333 + ((x * x) * 0.2))))
function code(x) return Float64(x + Float64(Float64(x * x) * Float64(x * Float64(0.3333333333333333 + Float64(Float64(x * x) * 0.2))))) end
function tmp = code(x) tmp = x + ((x * x) * (x * (0.3333333333333333 + ((x * x) * 0.2)))); end
code[x_] := N[(x + N[(N[(x * x), $MachinePrecision] * N[(x * N[(0.3333333333333333 + N[(N[(x * x), $MachinePrecision] * 0.2), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x + \left(x \cdot x\right) \cdot \left(x \cdot \left(0.3333333333333333 + \left(x \cdot x\right) \cdot 0.2\right)\right)
\end{array}
Initial program 8.7%
*-lowering-*.f64N/A
metadata-evalN/A
log-lowering-log.f64N/A
/-lowering-/.f64N/A
+-lowering-+.f64N/A
--lowering--.f648.7%
Simplified8.7%
Taylor expanded in x around 0
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-commutativeN/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f6499.9%
Simplified99.9%
+-commutativeN/A
distribute-rgt-inN/A
*-lft-identityN/A
+-lowering-+.f64N/A
associate-*l*N/A
*-commutativeN/A
*-lowering-*.f64N/A
*-lowering-*.f64N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-lowering-*.f64N/A
*-lowering-*.f6499.9%
Applied egg-rr99.9%
Final simplification99.9%
(FPCore (x) :precision binary64 (* x (+ 1.0 (* (* x x) (+ 0.3333333333333333 (* (* x x) 0.2))))))
double code(double x) {
return x * (1.0 + ((x * x) * (0.3333333333333333 + ((x * x) * 0.2))));
}
real(8) function code(x)
real(8), intent (in) :: x
code = x * (1.0d0 + ((x * x) * (0.3333333333333333d0 + ((x * x) * 0.2d0))))
end function
public static double code(double x) {
return x * (1.0 + ((x * x) * (0.3333333333333333 + ((x * x) * 0.2))));
}
def code(x): return x * (1.0 + ((x * x) * (0.3333333333333333 + ((x * x) * 0.2))))
function code(x) return Float64(x * Float64(1.0 + Float64(Float64(x * x) * Float64(0.3333333333333333 + Float64(Float64(x * x) * 0.2))))) end
function tmp = code(x) tmp = x * (1.0 + ((x * x) * (0.3333333333333333 + ((x * x) * 0.2)))); end
code[x_] := N[(x * N[(1.0 + N[(N[(x * x), $MachinePrecision] * N[(0.3333333333333333 + N[(N[(x * x), $MachinePrecision] * 0.2), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x \cdot \left(1 + \left(x \cdot x\right) \cdot \left(0.3333333333333333 + \left(x \cdot x\right) \cdot 0.2\right)\right)
\end{array}
Initial program 8.7%
*-lowering-*.f64N/A
metadata-evalN/A
log-lowering-log.f64N/A
/-lowering-/.f64N/A
+-lowering-+.f64N/A
--lowering--.f648.7%
Simplified8.7%
Taylor expanded in x around 0
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-commutativeN/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f6499.9%
Simplified99.9%
(FPCore (x) :precision binary64 (+ x (* (* x x) (* x 0.3333333333333333))))
double code(double x) {
return x + ((x * x) * (x * 0.3333333333333333));
}
real(8) function code(x)
real(8), intent (in) :: x
code = x + ((x * x) * (x * 0.3333333333333333d0))
end function
public static double code(double x) {
return x + ((x * x) * (x * 0.3333333333333333));
}
def code(x): return x + ((x * x) * (x * 0.3333333333333333))
function code(x) return Float64(x + Float64(Float64(x * x) * Float64(x * 0.3333333333333333))) end
function tmp = code(x) tmp = x + ((x * x) * (x * 0.3333333333333333)); end
code[x_] := N[(x + N[(N[(x * x), $MachinePrecision] * N[(x * 0.3333333333333333), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x + \left(x \cdot x\right) \cdot \left(x \cdot 0.3333333333333333\right)
\end{array}
Initial program 8.7%
*-lowering-*.f64N/A
metadata-evalN/A
log-lowering-log.f64N/A
/-lowering-/.f64N/A
+-lowering-+.f64N/A
--lowering--.f648.7%
Simplified8.7%
Taylor expanded in x around 0
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-commutativeN/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f6499.9%
Simplified99.9%
+-commutativeN/A
distribute-rgt-inN/A
*-lft-identityN/A
+-lowering-+.f64N/A
associate-*l*N/A
*-commutativeN/A
*-lowering-*.f64N/A
*-lowering-*.f64N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-lowering-*.f64N/A
*-lowering-*.f6499.9%
Applied egg-rr99.9%
Taylor expanded in x around 0
*-commutativeN/A
*-lowering-*.f6499.8%
Simplified99.8%
Final simplification99.8%
(FPCore (x) :precision binary64 (* x (+ 1.0 (* x (* x 0.3333333333333333)))))
double code(double x) {
return x * (1.0 + (x * (x * 0.3333333333333333)));
}
real(8) function code(x)
real(8), intent (in) :: x
code = x * (1.0d0 + (x * (x * 0.3333333333333333d0)))
end function
public static double code(double x) {
return x * (1.0 + (x * (x * 0.3333333333333333)));
}
def code(x): return x * (1.0 + (x * (x * 0.3333333333333333)))
function code(x) return Float64(x * Float64(1.0 + Float64(x * Float64(x * 0.3333333333333333)))) end
function tmp = code(x) tmp = x * (1.0 + (x * (x * 0.3333333333333333))); end
code[x_] := N[(x * N[(1.0 + N[(x * N[(x * 0.3333333333333333), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x \cdot \left(1 + x \cdot \left(x \cdot 0.3333333333333333\right)\right)
\end{array}
Initial program 8.7%
*-lowering-*.f64N/A
metadata-evalN/A
log-lowering-log.f64N/A
/-lowering-/.f64N/A
+-lowering-+.f64N/A
--lowering--.f648.7%
Simplified8.7%
Taylor expanded in x around 0
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-commutativeN/A
unpow2N/A
associate-*l*N/A
*-lowering-*.f64N/A
*-lowering-*.f6499.8%
Simplified99.8%
(FPCore (x) :precision binary64 x)
double code(double x) {
return x;
}
real(8) function code(x)
real(8), intent (in) :: x
code = x
end function
public static double code(double x) {
return x;
}
def code(x): return x
function code(x) return x end
function tmp = code(x) tmp = x; end
code[x_] := x
\begin{array}{l}
\\
x
\end{array}
Initial program 8.7%
*-lowering-*.f64N/A
metadata-evalN/A
log-lowering-log.f64N/A
/-lowering-/.f64N/A
+-lowering-+.f64N/A
--lowering--.f648.7%
Simplified8.7%
Taylor expanded in x around 0
Simplified99.0%
herbie shell --seed 2024152
(FPCore (x)
:name "Hyperbolic arc-(co)tangent"
:precision binary64
(* (/ 1.0 2.0) (log (/ (+ 1.0 x) (- 1.0 x)))))