
(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 9 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 -0.5) (not (<= t_0 5e-11))) (/ t_0 2.0) (/ (* x 2.0) 2.0))))
double code(double x) {
double t_0 = exp(x) - exp(-x);
double tmp;
if ((t_0 <= -0.5) || !(t_0 <= 5e-11)) {
tmp = t_0 / 2.0;
} else {
tmp = (x * 2.0) / 2.0;
}
return tmp;
}
real(8) function code(x)
real(8), intent (in) :: x
real(8) :: t_0
real(8) :: tmp
t_0 = exp(x) - exp(-x)
if ((t_0 <= (-0.5d0)) .or. (.not. (t_0 <= 5d-11))) then
tmp = t_0 / 2.0d0
else
tmp = (x * 2.0d0) / 2.0d0
end if
code = tmp
end function
public static double code(double x) {
double t_0 = Math.exp(x) - Math.exp(-x);
double tmp;
if ((t_0 <= -0.5) || !(t_0 <= 5e-11)) {
tmp = t_0 / 2.0;
} else {
tmp = (x * 2.0) / 2.0;
}
return tmp;
}
def code(x): t_0 = math.exp(x) - math.exp(-x) tmp = 0 if (t_0 <= -0.5) or not (t_0 <= 5e-11): tmp = t_0 / 2.0 else: tmp = (x * 2.0) / 2.0 return tmp
function code(x) t_0 = Float64(exp(x) - exp(Float64(-x))) tmp = 0.0 if ((t_0 <= -0.5) || !(t_0 <= 5e-11)) tmp = Float64(t_0 / 2.0); else tmp = Float64(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 <= -0.5) || ~((t_0 <= 5e-11))) tmp = t_0 / 2.0; else tmp = (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, -0.5], N[Not[LessEqual[t$95$0, 5e-11]], $MachinePrecision]], N[(t$95$0 / 2.0), $MachinePrecision], N[(N[(x * 2.0), $MachinePrecision] / 2.0), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := e^{x} - e^{-x}\\
\mathbf{if}\;t_0 \leq -0.5 \lor \neg \left(t_0 \leq 5 \cdot 10^{-11}\right):\\
\;\;\;\;\frac{t_0}{2}\\
\mathbf{else}:\\
\;\;\;\;\frac{x \cdot 2}{2}\\
\end{array}
\end{array}
if (-.f64 (exp.f64 x) (exp.f64 (neg.f64 x))) < -0.5 or 5.00000000000000018e-11 < (-.f64 (exp.f64 x) (exp.f64 (neg.f64 x))) Initial program 100.0%
if -0.5 < (-.f64 (exp.f64 x) (exp.f64 (neg.f64 x))) < 5.00000000000000018e-11Initial program 6.5%
Taylor expanded in x around 0 100.0%
Final simplification100.0%
(FPCore (x)
:precision binary64
(let* ((t_0 (* x (* x 0.3333333333333333))))
(if (or (<= x -370.0) (not (<= x 360.0)))
(/ (* (/ x 0.0) (fma x (* x 0.3333333333333333) 2.0)) 2.0)
(/
(* x (/ (- (* t_0 (* 0.3333333333333333 (* x x))) 4.0) (- t_0 2.0)))
2.0))))
double code(double x) {
double t_0 = x * (x * 0.3333333333333333);
double tmp;
if ((x <= -370.0) || !(x <= 360.0)) {
tmp = ((x / 0.0) * fma(x, (x * 0.3333333333333333), 2.0)) / 2.0;
} else {
tmp = (x * (((t_0 * (0.3333333333333333 * (x * x))) - 4.0) / (t_0 - 2.0))) / 2.0;
}
return tmp;
}
function code(x) t_0 = Float64(x * Float64(x * 0.3333333333333333)) tmp = 0.0 if ((x <= -370.0) || !(x <= 360.0)) tmp = Float64(Float64(Float64(x / 0.0) * fma(x, Float64(x * 0.3333333333333333), 2.0)) / 2.0); else tmp = Float64(Float64(x * Float64(Float64(Float64(t_0 * Float64(0.3333333333333333 * Float64(x * x))) - 4.0) / Float64(t_0 - 2.0))) / 2.0); end return tmp end
code[x_] := Block[{t$95$0 = N[(x * N[(x * 0.3333333333333333), $MachinePrecision]), $MachinePrecision]}, If[Or[LessEqual[x, -370.0], N[Not[LessEqual[x, 360.0]], $MachinePrecision]], N[(N[(N[(x / 0.0), $MachinePrecision] * N[(x * N[(x * 0.3333333333333333), $MachinePrecision] + 2.0), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision], N[(N[(x * N[(N[(N[(t$95$0 * N[(0.3333333333333333 * N[(x * x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] - 4.0), $MachinePrecision] / N[(t$95$0 - 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := x \cdot \left(x \cdot 0.3333333333333333\right)\\
\mathbf{if}\;x \leq -370 \lor \neg \left(x \leq 360\right):\\
\;\;\;\;\frac{\frac{x}{0} \cdot \mathsf{fma}\left(x, x \cdot 0.3333333333333333, 2\right)}{2}\\
\mathbf{else}:\\
\;\;\;\;\frac{x \cdot \frac{t_0 \cdot \left(0.3333333333333333 \cdot \left(x \cdot x\right)\right) - 4}{t_0 - 2}}{2}\\
\end{array}
\end{array}
if x < -370 or 360 < x Initial program 100.0%
Taylor expanded in x around 0 67.4%
unpow367.4%
associate-*r*67.4%
distribute-rgt-out67.4%
*-commutative67.4%
+-commutative67.4%
associate-*l*67.4%
fma-def67.4%
Simplified67.4%
fma-udef67.4%
Applied egg-rr67.4%
Taylor expanded in x around 0 67.4%
unpow267.4%
Simplified67.4%
*-commutative67.4%
associate-*r*67.4%
flip-+28.4%
metadata-eval28.4%
clear-num28.4%
un-div-inv28.4%
clear-num28.4%
metadata-eval28.4%
flip-+67.4%
associate-*r*67.4%
*-commutative67.4%
*-commutative67.4%
associate-*r*67.4%
fma-def67.4%
Applied egg-rr67.4%
Simplified99.3%
if -370 < x < 360Initial program 9.4%
Taylor expanded in x around 0 97.6%
unpow397.6%
associate-*r*97.6%
distribute-rgt-out97.6%
*-commutative97.6%
+-commutative97.6%
associate-*l*97.6%
fma-def97.6%
Simplified97.6%
fma-udef97.6%
flip-+97.6%
metadata-eval97.6%
Applied egg-rr97.6%
Taylor expanded in x around 0 97.6%
unpow297.6%
Simplified97.6%
Final simplification98.4%
(FPCore (x)
:precision binary64
(let* ((t_0 (* x (* x 0.3333333333333333)))
(t_1 (* 0.3333333333333333 (* x x)))
(t_2 (/ (* x t_1) 2.0))
(t_3 (/ (* x (/ (- (* t_0 t_1) 4.0) (- t_0 2.0))) 2.0)))
(if (<= x -2e+154)
t_2
(if (<= x -2e+77)
t_3
(if (<= x -2e+52)
(/
(*
x
(/
(+ (* x (* x (* (* x x) (* t_1 0.1111111111111111)))) 8.0)
(+ (* t_0 t_0) (- 4.0 (* 2.0 t_0)))))
2.0)
(if (<= x 1e+102) t_3 t_2))))))
double code(double x) {
double t_0 = x * (x * 0.3333333333333333);
double t_1 = 0.3333333333333333 * (x * x);
double t_2 = (x * t_1) / 2.0;
double t_3 = (x * (((t_0 * t_1) - 4.0) / (t_0 - 2.0))) / 2.0;
double tmp;
if (x <= -2e+154) {
tmp = t_2;
} else if (x <= -2e+77) {
tmp = t_3;
} else if (x <= -2e+52) {
tmp = (x * (((x * (x * ((x * x) * (t_1 * 0.1111111111111111)))) + 8.0) / ((t_0 * t_0) + (4.0 - (2.0 * t_0))))) / 2.0;
} else if (x <= 1e+102) {
tmp = t_3;
} else {
tmp = t_2;
}
return tmp;
}
real(8) function code(x)
real(8), intent (in) :: x
real(8) :: t_0
real(8) :: t_1
real(8) :: t_2
real(8) :: t_3
real(8) :: tmp
t_0 = x * (x * 0.3333333333333333d0)
t_1 = 0.3333333333333333d0 * (x * x)
t_2 = (x * t_1) / 2.0d0
t_3 = (x * (((t_0 * t_1) - 4.0d0) / (t_0 - 2.0d0))) / 2.0d0
if (x <= (-2d+154)) then
tmp = t_2
else if (x <= (-2d+77)) then
tmp = t_3
else if (x <= (-2d+52)) then
tmp = (x * (((x * (x * ((x * x) * (t_1 * 0.1111111111111111d0)))) + 8.0d0) / ((t_0 * t_0) + (4.0d0 - (2.0d0 * t_0))))) / 2.0d0
else if (x <= 1d+102) then
tmp = t_3
else
tmp = t_2
end if
code = tmp
end function
public static double code(double x) {
double t_0 = x * (x * 0.3333333333333333);
double t_1 = 0.3333333333333333 * (x * x);
double t_2 = (x * t_1) / 2.0;
double t_3 = (x * (((t_0 * t_1) - 4.0) / (t_0 - 2.0))) / 2.0;
double tmp;
if (x <= -2e+154) {
tmp = t_2;
} else if (x <= -2e+77) {
tmp = t_3;
} else if (x <= -2e+52) {
tmp = (x * (((x * (x * ((x * x) * (t_1 * 0.1111111111111111)))) + 8.0) / ((t_0 * t_0) + (4.0 - (2.0 * t_0))))) / 2.0;
} else if (x <= 1e+102) {
tmp = t_3;
} else {
tmp = t_2;
}
return tmp;
}
def code(x): t_0 = x * (x * 0.3333333333333333) t_1 = 0.3333333333333333 * (x * x) t_2 = (x * t_1) / 2.0 t_3 = (x * (((t_0 * t_1) - 4.0) / (t_0 - 2.0))) / 2.0 tmp = 0 if x <= -2e+154: tmp = t_2 elif x <= -2e+77: tmp = t_3 elif x <= -2e+52: tmp = (x * (((x * (x * ((x * x) * (t_1 * 0.1111111111111111)))) + 8.0) / ((t_0 * t_0) + (4.0 - (2.0 * t_0))))) / 2.0 elif x <= 1e+102: tmp = t_3 else: tmp = t_2 return tmp
function code(x) t_0 = Float64(x * Float64(x * 0.3333333333333333)) t_1 = Float64(0.3333333333333333 * Float64(x * x)) t_2 = Float64(Float64(x * t_1) / 2.0) t_3 = Float64(Float64(x * Float64(Float64(Float64(t_0 * t_1) - 4.0) / Float64(t_0 - 2.0))) / 2.0) tmp = 0.0 if (x <= -2e+154) tmp = t_2; elseif (x <= -2e+77) tmp = t_3; elseif (x <= -2e+52) tmp = Float64(Float64(x * Float64(Float64(Float64(x * Float64(x * Float64(Float64(x * x) * Float64(t_1 * 0.1111111111111111)))) + 8.0) / Float64(Float64(t_0 * t_0) + Float64(4.0 - Float64(2.0 * t_0))))) / 2.0); elseif (x <= 1e+102) tmp = t_3; else tmp = t_2; end return tmp end
function tmp_2 = code(x) t_0 = x * (x * 0.3333333333333333); t_1 = 0.3333333333333333 * (x * x); t_2 = (x * t_1) / 2.0; t_3 = (x * (((t_0 * t_1) - 4.0) / (t_0 - 2.0))) / 2.0; tmp = 0.0; if (x <= -2e+154) tmp = t_2; elseif (x <= -2e+77) tmp = t_3; elseif (x <= -2e+52) tmp = (x * (((x * (x * ((x * x) * (t_1 * 0.1111111111111111)))) + 8.0) / ((t_0 * t_0) + (4.0 - (2.0 * t_0))))) / 2.0; elseif (x <= 1e+102) tmp = t_3; else tmp = t_2; end tmp_2 = tmp; end
code[x_] := Block[{t$95$0 = N[(x * N[(x * 0.3333333333333333), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$1 = N[(0.3333333333333333 * N[(x * x), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$2 = N[(N[(x * t$95$1), $MachinePrecision] / 2.0), $MachinePrecision]}, Block[{t$95$3 = N[(N[(x * N[(N[(N[(t$95$0 * t$95$1), $MachinePrecision] - 4.0), $MachinePrecision] / N[(t$95$0 - 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]}, If[LessEqual[x, -2e+154], t$95$2, If[LessEqual[x, -2e+77], t$95$3, If[LessEqual[x, -2e+52], N[(N[(x * N[(N[(N[(x * N[(x * N[(N[(x * x), $MachinePrecision] * N[(t$95$1 * 0.1111111111111111), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + 8.0), $MachinePrecision] / N[(N[(t$95$0 * t$95$0), $MachinePrecision] + N[(4.0 - N[(2.0 * t$95$0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision], If[LessEqual[x, 1e+102], t$95$3, t$95$2]]]]]]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := x \cdot \left(x \cdot 0.3333333333333333\right)\\
t_1 := 0.3333333333333333 \cdot \left(x \cdot x\right)\\
t_2 := \frac{x \cdot t_1}{2}\\
t_3 := \frac{x \cdot \frac{t_0 \cdot t_1 - 4}{t_0 - 2}}{2}\\
\mathbf{if}\;x \leq -2 \cdot 10^{+154}:\\
\;\;\;\;t_2\\
\mathbf{elif}\;x \leq -2 \cdot 10^{+77}:\\
\;\;\;\;t_3\\
\mathbf{elif}\;x \leq -2 \cdot 10^{+52}:\\
\;\;\;\;\frac{x \cdot \frac{x \cdot \left(x \cdot \left(\left(x \cdot x\right) \cdot \left(t_1 \cdot 0.1111111111111111\right)\right)\right) + 8}{t_0 \cdot t_0 + \left(4 - 2 \cdot t_0\right)}}{2}\\
\mathbf{elif}\;x \leq 10^{+102}:\\
\;\;\;\;t_3\\
\mathbf{else}:\\
\;\;\;\;t_2\\
\end{array}
\end{array}
if x < -2.00000000000000007e154 or 9.99999999999999977e101 < x Initial program 100.0%
Taylor expanded in x around 0 100.0%
unpow3100.0%
associate-*r*100.0%
distribute-rgt-out100.0%
*-commutative100.0%
+-commutative100.0%
associate-*l*100.0%
fma-def100.0%
Simplified100.0%
Taylor expanded in x around inf 100.0%
unpow2100.0%
Simplified100.0%
if -2.00000000000000007e154 < x < -1.99999999999999997e77 or -2e52 < x < 9.99999999999999977e101Initial program 33.4%
Taylor expanded in x around 0 79.2%
unpow379.2%
associate-*r*79.2%
distribute-rgt-out79.2%
*-commutative79.2%
+-commutative79.2%
associate-*l*79.2%
fma-def79.2%
Simplified79.2%
fma-udef79.2%
flip-+86.1%
metadata-eval86.1%
Applied egg-rr86.1%
Taylor expanded in x around 0 86.1%
unpow279.2%
Simplified86.1%
if -1.99999999999999997e77 < x < -2e52Initial program 100.0%
Taylor expanded in x around 0 5.4%
unpow35.4%
associate-*r*5.4%
distribute-rgt-out5.4%
*-commutative5.4%
+-commutative5.4%
associate-*l*5.4%
fma-def5.4%
Simplified5.4%
fma-udef5.4%
flip3-+100.0%
metadata-eval100.0%
metadata-eval100.0%
Applied egg-rr100.0%
unpow3100.0%
swap-sqr100.0%
associate-*l*100.0%
swap-sqr100.0%
metadata-eval100.0%
associate-*r*100.0%
*-commutative100.0%
Applied egg-rr100.0%
Simplified100.0%
Final simplification90.5%
(FPCore (x)
:precision binary64
(let* ((t_0 (* x (* x 0.3333333333333333)))
(t_1 (* 0.3333333333333333 (* x x))))
(if (or (<= x -2e+154) (not (<= x 1e+102)))
(/ (* x t_1) 2.0)
(/ (* x (/ (- (* t_0 t_1) 4.0) (- t_0 2.0))) 2.0))))
double code(double x) {
double t_0 = x * (x * 0.3333333333333333);
double t_1 = 0.3333333333333333 * (x * x);
double tmp;
if ((x <= -2e+154) || !(x <= 1e+102)) {
tmp = (x * t_1) / 2.0;
} else {
tmp = (x * (((t_0 * t_1) - 4.0) / (t_0 - 2.0))) / 2.0;
}
return tmp;
}
real(8) function code(x)
real(8), intent (in) :: x
real(8) :: t_0
real(8) :: t_1
real(8) :: tmp
t_0 = x * (x * 0.3333333333333333d0)
t_1 = 0.3333333333333333d0 * (x * x)
if ((x <= (-2d+154)) .or. (.not. (x <= 1d+102))) then
tmp = (x * t_1) / 2.0d0
else
tmp = (x * (((t_0 * t_1) - 4.0d0) / (t_0 - 2.0d0))) / 2.0d0
end if
code = tmp
end function
public static double code(double x) {
double t_0 = x * (x * 0.3333333333333333);
double t_1 = 0.3333333333333333 * (x * x);
double tmp;
if ((x <= -2e+154) || !(x <= 1e+102)) {
tmp = (x * t_1) / 2.0;
} else {
tmp = (x * (((t_0 * t_1) - 4.0) / (t_0 - 2.0))) / 2.0;
}
return tmp;
}
def code(x): t_0 = x * (x * 0.3333333333333333) t_1 = 0.3333333333333333 * (x * x) tmp = 0 if (x <= -2e+154) or not (x <= 1e+102): tmp = (x * t_1) / 2.0 else: tmp = (x * (((t_0 * t_1) - 4.0) / (t_0 - 2.0))) / 2.0 return tmp
function code(x) t_0 = Float64(x * Float64(x * 0.3333333333333333)) t_1 = Float64(0.3333333333333333 * Float64(x * x)) tmp = 0.0 if ((x <= -2e+154) || !(x <= 1e+102)) tmp = Float64(Float64(x * t_1) / 2.0); else tmp = Float64(Float64(x * Float64(Float64(Float64(t_0 * t_1) - 4.0) / Float64(t_0 - 2.0))) / 2.0); end return tmp end
function tmp_2 = code(x) t_0 = x * (x * 0.3333333333333333); t_1 = 0.3333333333333333 * (x * x); tmp = 0.0; if ((x <= -2e+154) || ~((x <= 1e+102))) tmp = (x * t_1) / 2.0; else tmp = (x * (((t_0 * t_1) - 4.0) / (t_0 - 2.0))) / 2.0; end tmp_2 = tmp; end
code[x_] := Block[{t$95$0 = N[(x * N[(x * 0.3333333333333333), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$1 = N[(0.3333333333333333 * N[(x * x), $MachinePrecision]), $MachinePrecision]}, If[Or[LessEqual[x, -2e+154], N[Not[LessEqual[x, 1e+102]], $MachinePrecision]], N[(N[(x * t$95$1), $MachinePrecision] / 2.0), $MachinePrecision], N[(N[(x * N[(N[(N[(t$95$0 * t$95$1), $MachinePrecision] - 4.0), $MachinePrecision] / N[(t$95$0 - 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := x \cdot \left(x \cdot 0.3333333333333333\right)\\
t_1 := 0.3333333333333333 \cdot \left(x \cdot x\right)\\
\mathbf{if}\;x \leq -2 \cdot 10^{+154} \lor \neg \left(x \leq 10^{+102}\right):\\
\;\;\;\;\frac{x \cdot t_1}{2}\\
\mathbf{else}:\\
\;\;\;\;\frac{x \cdot \frac{t_0 \cdot t_1 - 4}{t_0 - 2}}{2}\\
\end{array}
\end{array}
if x < -2.00000000000000007e154 or 9.99999999999999977e101 < x Initial program 100.0%
Taylor expanded in x around 0 100.0%
unpow3100.0%
associate-*r*100.0%
distribute-rgt-out100.0%
*-commutative100.0%
+-commutative100.0%
associate-*l*100.0%
fma-def100.0%
Simplified100.0%
Taylor expanded in x around inf 100.0%
unpow2100.0%
Simplified100.0%
if -2.00000000000000007e154 < x < 9.99999999999999977e101Initial program 36.6%
Taylor expanded in x around 0 75.5%
unpow375.5%
associate-*r*75.5%
distribute-rgt-out75.5%
*-commutative75.5%
+-commutative75.5%
associate-*l*75.5%
fma-def75.5%
Simplified75.5%
fma-udef75.5%
flip-+82.1%
metadata-eval82.1%
Applied egg-rr82.1%
Taylor expanded in x around 0 82.1%
unpow275.5%
Simplified82.1%
Final simplification87.2%
(FPCore (x) :precision binary64 (if (or (<= x -2.5) (not (<= x 2.5))) (/ (* x (* 0.3333333333333333 (* x x))) 2.0) (/ (* x 2.0) 2.0)))
double code(double x) {
double tmp;
if ((x <= -2.5) || !(x <= 2.5)) {
tmp = (x * (0.3333333333333333 * (x * x))) / 2.0;
} else {
tmp = (x * 2.0) / 2.0;
}
return tmp;
}
real(8) function code(x)
real(8), intent (in) :: x
real(8) :: tmp
if ((x <= (-2.5d0)) .or. (.not. (x <= 2.5d0))) then
tmp = (x * (0.3333333333333333d0 * (x * x))) / 2.0d0
else
tmp = (x * 2.0d0) / 2.0d0
end if
code = tmp
end function
public static double code(double x) {
double tmp;
if ((x <= -2.5) || !(x <= 2.5)) {
tmp = (x * (0.3333333333333333 * (x * x))) / 2.0;
} else {
tmp = (x * 2.0) / 2.0;
}
return tmp;
}
def code(x): tmp = 0 if (x <= -2.5) or not (x <= 2.5): tmp = (x * (0.3333333333333333 * (x * x))) / 2.0 else: tmp = (x * 2.0) / 2.0 return tmp
function code(x) tmp = 0.0 if ((x <= -2.5) || !(x <= 2.5)) tmp = Float64(Float64(x * Float64(0.3333333333333333 * Float64(x * x))) / 2.0); else tmp = Float64(Float64(x * 2.0) / 2.0); end return tmp end
function tmp_2 = code(x) tmp = 0.0; if ((x <= -2.5) || ~((x <= 2.5))) tmp = (x * (0.3333333333333333 * (x * x))) / 2.0; else tmp = (x * 2.0) / 2.0; end tmp_2 = tmp; end
code[x_] := If[Or[LessEqual[x, -2.5], N[Not[LessEqual[x, 2.5]], $MachinePrecision]], N[(N[(x * N[(0.3333333333333333 * N[(x * x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision], N[(N[(x * 2.0), $MachinePrecision] / 2.0), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -2.5 \lor \neg \left(x \leq 2.5\right):\\
\;\;\;\;\frac{x \cdot \left(0.3333333333333333 \cdot \left(x \cdot x\right)\right)}{2}\\
\mathbf{else}:\\
\;\;\;\;\frac{x \cdot 2}{2}\\
\end{array}
\end{array}
if x < -2.5 or 2.5 < x Initial program 100.0%
Taylor expanded in x around 0 66.6%
unpow366.6%
associate-*r*66.6%
distribute-rgt-out66.6%
*-commutative66.6%
+-commutative66.6%
associate-*l*66.6%
fma-def66.6%
Simplified66.6%
Taylor expanded in x around inf 66.6%
unpow266.6%
Simplified66.6%
if -2.5 < x < 2.5Initial program 8.0%
Taylor expanded in x around 0 98.8%
Final simplification82.4%
(FPCore (x) :precision binary64 (/ (* x (+ 2.0 (* 0.3333333333333333 (* x x)))) 2.0))
double code(double x) {
return (x * (2.0 + (0.3333333333333333 * (x * x)))) / 2.0;
}
real(8) function code(x)
real(8), intent (in) :: x
code = (x * (2.0d0 + (0.3333333333333333d0 * (x * x)))) / 2.0d0
end function
public static double code(double x) {
return (x * (2.0 + (0.3333333333333333 * (x * x)))) / 2.0;
}
def code(x): return (x * (2.0 + (0.3333333333333333 * (x * x)))) / 2.0
function code(x) return Float64(Float64(x * Float64(2.0 + Float64(0.3333333333333333 * Float64(x * x)))) / 2.0) end
function tmp = code(x) tmp = (x * (2.0 + (0.3333333333333333 * (x * x)))) / 2.0; end
code[x_] := N[(N[(x * N[(2.0 + N[(0.3333333333333333 * N[(x * x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]
\begin{array}{l}
\\
\frac{x \cdot \left(2 + 0.3333333333333333 \cdot \left(x \cdot x\right)\right)}{2}
\end{array}
Initial program 54.7%
Taylor expanded in x around 0 82.5%
unpow382.5%
associate-*r*82.5%
distribute-rgt-out82.5%
*-commutative82.5%
+-commutative82.5%
associate-*l*82.5%
fma-def82.5%
Simplified82.5%
fma-udef82.5%
Applied egg-rr82.5%
Taylor expanded in x around 0 82.5%
unpow282.5%
Simplified82.5%
Final simplification82.5%
(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 54.7%
Taylor expanded in x around 0 51.3%
Final simplification51.3%
(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 54.7%
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 54.7%
Applied egg-rr3.4%
Final simplification3.4%
herbie shell --seed 2023224
(FPCore (x)
:name "Hyperbolic sine"
:precision binary64
(/ (- (exp x) (exp (- x))) 2.0))