
(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 8 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 (log1p (expm1 x)))
double code(double x) {
return log1p(expm1(x));
}
public static double code(double x) {
return Math.log1p(Math.expm1(x));
}
def code(x): return math.log1p(math.expm1(x))
function code(x) return log1p(expm1(x)) end
code[x_] := N[Log[1 + N[(Exp[x] - 1), $MachinePrecision]], $MachinePrecision]
\begin{array}{l}
\\
\mathsf{log1p}\left(\mathsf{expm1}\left(x\right)\right)
\end{array}
Initial program 56.9%
Taylor expanded in x around 0 83.0%
unpow383.0%
associate-*r*83.0%
distribute-rgt-out83.0%
*-commutative83.0%
+-commutative83.0%
associate-*l*83.0%
fma-def83.0%
Simplified83.0%
Taylor expanded in x around 0 48.9%
associate-/l*48.6%
metadata-eval48.6%
/-rgt-identity48.6%
log1p-expm1-u99.7%
Applied egg-rr99.7%
Final simplification99.7%
(FPCore (x)
:precision binary64
(let* ((t_0 (* x (* x 0.3333333333333333)))
(t_1 (* t_0 t_0))
(t_2 (* 0.3333333333333333 (* x x)))
(t_3 (/ (* x t_2) 2.0))
(t_4 (/ (* x (/ (- t_1 4.0) (- t_2 2.0))) 2.0)))
(if (<= x -1e+154)
t_3
(if (<= x -2e+77)
t_4
(if (<= x 2e+77)
(/ (* x (/ (+ (pow t_0 3.0) 8.0) (+ t_1 (- 4.0 (* 2.0 t_0))))) 2.0)
(if (<= x 1e+103) t_4 t_3))))))
double code(double x) {
double t_0 = x * (x * 0.3333333333333333);
double t_1 = t_0 * t_0;
double t_2 = 0.3333333333333333 * (x * x);
double t_3 = (x * t_2) / 2.0;
double t_4 = (x * ((t_1 - 4.0) / (t_2 - 2.0))) / 2.0;
double tmp;
if (x <= -1e+154) {
tmp = t_3;
} else if (x <= -2e+77) {
tmp = t_4;
} else if (x <= 2e+77) {
tmp = (x * ((pow(t_0, 3.0) + 8.0) / (t_1 + (4.0 - (2.0 * t_0))))) / 2.0;
} else if (x <= 1e+103) {
tmp = t_4;
} else {
tmp = t_3;
}
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) :: t_4
real(8) :: tmp
t_0 = x * (x * 0.3333333333333333d0)
t_1 = t_0 * t_0
t_2 = 0.3333333333333333d0 * (x * x)
t_3 = (x * t_2) / 2.0d0
t_4 = (x * ((t_1 - 4.0d0) / (t_2 - 2.0d0))) / 2.0d0
if (x <= (-1d+154)) then
tmp = t_3
else if (x <= (-2d+77)) then
tmp = t_4
else if (x <= 2d+77) then
tmp = (x * (((t_0 ** 3.0d0) + 8.0d0) / (t_1 + (4.0d0 - (2.0d0 * t_0))))) / 2.0d0
else if (x <= 1d+103) then
tmp = t_4
else
tmp = t_3
end if
code = tmp
end function
public static double code(double x) {
double t_0 = x * (x * 0.3333333333333333);
double t_1 = t_0 * t_0;
double t_2 = 0.3333333333333333 * (x * x);
double t_3 = (x * t_2) / 2.0;
double t_4 = (x * ((t_1 - 4.0) / (t_2 - 2.0))) / 2.0;
double tmp;
if (x <= -1e+154) {
tmp = t_3;
} else if (x <= -2e+77) {
tmp = t_4;
} else if (x <= 2e+77) {
tmp = (x * ((Math.pow(t_0, 3.0) + 8.0) / (t_1 + (4.0 - (2.0 * t_0))))) / 2.0;
} else if (x <= 1e+103) {
tmp = t_4;
} else {
tmp = t_3;
}
return tmp;
}
def code(x): t_0 = x * (x * 0.3333333333333333) t_1 = t_0 * t_0 t_2 = 0.3333333333333333 * (x * x) t_3 = (x * t_2) / 2.0 t_4 = (x * ((t_1 - 4.0) / (t_2 - 2.0))) / 2.0 tmp = 0 if x <= -1e+154: tmp = t_3 elif x <= -2e+77: tmp = t_4 elif x <= 2e+77: tmp = (x * ((math.pow(t_0, 3.0) + 8.0) / (t_1 + (4.0 - (2.0 * t_0))))) / 2.0 elif x <= 1e+103: tmp = t_4 else: tmp = t_3 return tmp
function code(x) t_0 = Float64(x * Float64(x * 0.3333333333333333)) t_1 = Float64(t_0 * t_0) t_2 = Float64(0.3333333333333333 * Float64(x * x)) t_3 = Float64(Float64(x * t_2) / 2.0) t_4 = Float64(Float64(x * Float64(Float64(t_1 - 4.0) / Float64(t_2 - 2.0))) / 2.0) tmp = 0.0 if (x <= -1e+154) tmp = t_3; elseif (x <= -2e+77) tmp = t_4; elseif (x <= 2e+77) tmp = Float64(Float64(x * Float64(Float64((t_0 ^ 3.0) + 8.0) / Float64(t_1 + Float64(4.0 - Float64(2.0 * t_0))))) / 2.0); elseif (x <= 1e+103) tmp = t_4; else tmp = t_3; end return tmp end
function tmp_2 = code(x) t_0 = x * (x * 0.3333333333333333); t_1 = t_0 * t_0; t_2 = 0.3333333333333333 * (x * x); t_3 = (x * t_2) / 2.0; t_4 = (x * ((t_1 - 4.0) / (t_2 - 2.0))) / 2.0; tmp = 0.0; if (x <= -1e+154) tmp = t_3; elseif (x <= -2e+77) tmp = t_4; elseif (x <= 2e+77) tmp = (x * (((t_0 ^ 3.0) + 8.0) / (t_1 + (4.0 - (2.0 * t_0))))) / 2.0; elseif (x <= 1e+103) tmp = t_4; else tmp = t_3; end tmp_2 = tmp; end
code[x_] := Block[{t$95$0 = N[(x * N[(x * 0.3333333333333333), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$1 = N[(t$95$0 * t$95$0), $MachinePrecision]}, Block[{t$95$2 = N[(0.3333333333333333 * N[(x * x), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$3 = N[(N[(x * t$95$2), $MachinePrecision] / 2.0), $MachinePrecision]}, Block[{t$95$4 = N[(N[(x * N[(N[(t$95$1 - 4.0), $MachinePrecision] / N[(t$95$2 - 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]}, If[LessEqual[x, -1e+154], t$95$3, If[LessEqual[x, -2e+77], t$95$4, If[LessEqual[x, 2e+77], N[(N[(x * N[(N[(N[Power[t$95$0, 3.0], $MachinePrecision] + 8.0), $MachinePrecision] / N[(t$95$1 + N[(4.0 - N[(2.0 * t$95$0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision], If[LessEqual[x, 1e+103], t$95$4, t$95$3]]]]]]]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := x \cdot \left(x \cdot 0.3333333333333333\right)\\
t_1 := t_0 \cdot t_0\\
t_2 := 0.3333333333333333 \cdot \left(x \cdot x\right)\\
t_3 := \frac{x \cdot t_2}{2}\\
t_4 := \frac{x \cdot \frac{t_1 - 4}{t_2 - 2}}{2}\\
\mathbf{if}\;x \leq -1 \cdot 10^{+154}:\\
\;\;\;\;t_3\\
\mathbf{elif}\;x \leq -2 \cdot 10^{+77}:\\
\;\;\;\;t_4\\
\mathbf{elif}\;x \leq 2 \cdot 10^{+77}:\\
\;\;\;\;\frac{x \cdot \frac{{t_0}^{3} + 8}{t_1 + \left(4 - 2 \cdot t_0\right)}}{2}\\
\mathbf{elif}\;x \leq 10^{+103}:\\
\;\;\;\;t_4\\
\mathbf{else}:\\
\;\;\;\;t_3\\
\end{array}
\end{array}
if x < -1.00000000000000004e154 or 1e103 < 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 -1.00000000000000004e154 < x < -1.99999999999999997e77 or 1.99999999999999997e77 < x < 1e103Initial program 100.0%
Taylor expanded in x around 0 59.5%
unpow359.5%
associate-*r*59.5%
distribute-rgt-out59.5%
*-commutative59.5%
+-commutative59.5%
associate-*l*59.5%
fma-def59.5%
Simplified59.5%
fma-udef59.5%
flip-+100.0%
metadata-eval100.0%
Applied egg-rr100.0%
Taylor expanded in x around 0 100.0%
unpow259.5%
Simplified100.0%
if -1.99999999999999997e77 < x < 1.99999999999999997e77Initial program 27.5%
Taylor expanded in x around 0 78.0%
unpow378.0%
associate-*r*78.0%
distribute-rgt-out78.0%
*-commutative78.0%
+-commutative78.0%
associate-*l*78.0%
fma-def78.0%
Simplified78.0%
fma-udef78.0%
flip3-+84.9%
metadata-eval84.9%
metadata-eval84.9%
Applied egg-rr84.9%
Final simplification91.0%
(FPCore (x)
:precision binary64
(if (or (<= x -5e+155) (not (<= x 1e+103)))
(/ (* x (* 0.3333333333333333 (* x x))) 2.0)
(/
(*
x
(/
(- (* 0.1111111111111111 (pow x 4.0)) 4.0)
(- (* x (* x 0.3333333333333333)) 2.0)))
2.0)))
double code(double x) {
double tmp;
if ((x <= -5e+155) || !(x <= 1e+103)) {
tmp = (x * (0.3333333333333333 * (x * x))) / 2.0;
} else {
tmp = (x * (((0.1111111111111111 * pow(x, 4.0)) - 4.0) / ((x * (x * 0.3333333333333333)) - 2.0))) / 2.0;
}
return tmp;
}
real(8) function code(x)
real(8), intent (in) :: x
real(8) :: tmp
if ((x <= (-5d+155)) .or. (.not. (x <= 1d+103))) then
tmp = (x * (0.3333333333333333d0 * (x * x))) / 2.0d0
else
tmp = (x * (((0.1111111111111111d0 * (x ** 4.0d0)) - 4.0d0) / ((x * (x * 0.3333333333333333d0)) - 2.0d0))) / 2.0d0
end if
code = tmp
end function
public static double code(double x) {
double tmp;
if ((x <= -5e+155) || !(x <= 1e+103)) {
tmp = (x * (0.3333333333333333 * (x * x))) / 2.0;
} else {
tmp = (x * (((0.1111111111111111 * Math.pow(x, 4.0)) - 4.0) / ((x * (x * 0.3333333333333333)) - 2.0))) / 2.0;
}
return tmp;
}
def code(x): tmp = 0 if (x <= -5e+155) or not (x <= 1e+103): tmp = (x * (0.3333333333333333 * (x * x))) / 2.0 else: tmp = (x * (((0.1111111111111111 * math.pow(x, 4.0)) - 4.0) / ((x * (x * 0.3333333333333333)) - 2.0))) / 2.0 return tmp
function code(x) tmp = 0.0 if ((x <= -5e+155) || !(x <= 1e+103)) tmp = Float64(Float64(x * Float64(0.3333333333333333 * Float64(x * x))) / 2.0); else tmp = Float64(Float64(x * Float64(Float64(Float64(0.1111111111111111 * (x ^ 4.0)) - 4.0) / Float64(Float64(x * Float64(x * 0.3333333333333333)) - 2.0))) / 2.0); end return tmp end
function tmp_2 = code(x) tmp = 0.0; if ((x <= -5e+155) || ~((x <= 1e+103))) tmp = (x * (0.3333333333333333 * (x * x))) / 2.0; else tmp = (x * (((0.1111111111111111 * (x ^ 4.0)) - 4.0) / ((x * (x * 0.3333333333333333)) - 2.0))) / 2.0; end tmp_2 = tmp; end
code[x_] := If[Or[LessEqual[x, -5e+155], N[Not[LessEqual[x, 1e+103]], $MachinePrecision]], N[(N[(x * N[(0.3333333333333333 * N[(x * x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision], N[(N[(x * N[(N[(N[(0.1111111111111111 * N[Power[x, 4.0], $MachinePrecision]), $MachinePrecision] - 4.0), $MachinePrecision] / N[(N[(x * N[(x * 0.3333333333333333), $MachinePrecision]), $MachinePrecision] - 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -5 \cdot 10^{+155} \lor \neg \left(x \leq 10^{+103}\right):\\
\;\;\;\;\frac{x \cdot \left(0.3333333333333333 \cdot \left(x \cdot x\right)\right)}{2}\\
\mathbf{else}:\\
\;\;\;\;\frac{x \cdot \frac{0.1111111111111111 \cdot {x}^{4} - 4}{x \cdot \left(x \cdot 0.3333333333333333\right) - 2}}{2}\\
\end{array}
\end{array}
if x < -4.9999999999999999e155 or 1e103 < 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 -4.9999999999999999e155 < x < 1e103Initial program 37.7%
Taylor expanded in x around 0 75.4%
unpow375.4%
associate-*r*75.4%
distribute-rgt-out75.4%
*-commutative75.4%
+-commutative75.4%
associate-*l*75.4%
fma-def75.4%
Simplified75.4%
fma-udef75.4%
flip-+81.1%
metadata-eval81.1%
Applied egg-rr81.1%
Taylor expanded in x around 0 81.7%
Final simplification87.3%
(FPCore (x)
:precision binary64
(let* ((t_0 (* x (* x 0.3333333333333333)))
(t_1 (* 0.3333333333333333 (* x x))))
(if (or (<= x -1e+154) (not (<= x 1e+103)))
(/ (* x t_1) 2.0)
(/ (* x (/ (- (* t_0 t_0) 4.0) (- t_1 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 <= -1e+154) || !(x <= 1e+103)) {
tmp = (x * t_1) / 2.0;
} else {
tmp = (x * (((t_0 * t_0) - 4.0) / (t_1 - 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 <= (-1d+154)) .or. (.not. (x <= 1d+103))) then
tmp = (x * t_1) / 2.0d0
else
tmp = (x * (((t_0 * t_0) - 4.0d0) / (t_1 - 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 <= -1e+154) || !(x <= 1e+103)) {
tmp = (x * t_1) / 2.0;
} else {
tmp = (x * (((t_0 * t_0) - 4.0) / (t_1 - 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 <= -1e+154) or not (x <= 1e+103): tmp = (x * t_1) / 2.0 else: tmp = (x * (((t_0 * t_0) - 4.0) / (t_1 - 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 <= -1e+154) || !(x <= 1e+103)) tmp = Float64(Float64(x * t_1) / 2.0); else tmp = Float64(Float64(x * Float64(Float64(Float64(t_0 * t_0) - 4.0) / Float64(t_1 - 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 <= -1e+154) || ~((x <= 1e+103))) tmp = (x * t_1) / 2.0; else tmp = (x * (((t_0 * t_0) - 4.0) / (t_1 - 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, -1e+154], N[Not[LessEqual[x, 1e+103]], $MachinePrecision]], N[(N[(x * t$95$1), $MachinePrecision] / 2.0), $MachinePrecision], N[(N[(x * N[(N[(N[(t$95$0 * t$95$0), $MachinePrecision] - 4.0), $MachinePrecision] / N[(t$95$1 - 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 -1 \cdot 10^{+154} \lor \neg \left(x \leq 10^{+103}\right):\\
\;\;\;\;\frac{x \cdot t_1}{2}\\
\mathbf{else}:\\
\;\;\;\;\frac{x \cdot \frac{t_0 \cdot t_0 - 4}{t_1 - 2}}{2}\\
\end{array}
\end{array}
if x < -1.00000000000000004e154 or 1e103 < 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 -1.00000000000000004e154 < x < 1e103Initial program 37.7%
Taylor expanded in x around 0 75.4%
unpow375.4%
associate-*r*75.4%
distribute-rgt-out75.4%
*-commutative75.4%
+-commutative75.4%
associate-*l*75.4%
fma-def75.4%
Simplified75.4%
fma-udef75.4%
flip-+81.1%
metadata-eval81.1%
Applied egg-rr81.1%
Taylor expanded in x around 0 81.1%
unpow275.4%
Simplified81.1%
Final simplification87.0%
(FPCore (x) :precision binary64 (if (or (<= x -2.5) (not (<= x 2.4))) (/ (* x (* 0.3333333333333333 (* x x))) 2.0) x))
double code(double x) {
double tmp;
if ((x <= -2.5) || !(x <= 2.4)) {
tmp = (x * (0.3333333333333333 * (x * x))) / 2.0;
} else {
tmp = x;
}
return tmp;
}
real(8) function code(x)
real(8), intent (in) :: x
real(8) :: tmp
if ((x <= (-2.5d0)) .or. (.not. (x <= 2.4d0))) then
tmp = (x * (0.3333333333333333d0 * (x * x))) / 2.0d0
else
tmp = x
end if
code = tmp
end function
public static double code(double x) {
double tmp;
if ((x <= -2.5) || !(x <= 2.4)) {
tmp = (x * (0.3333333333333333 * (x * x))) / 2.0;
} else {
tmp = x;
}
return tmp;
}
def code(x): tmp = 0 if (x <= -2.5) or not (x <= 2.4): tmp = (x * (0.3333333333333333 * (x * x))) / 2.0 else: tmp = x return tmp
function code(x) tmp = 0.0 if ((x <= -2.5) || !(x <= 2.4)) tmp = Float64(Float64(x * Float64(0.3333333333333333 * Float64(x * x))) / 2.0); else tmp = x; end return tmp end
function tmp_2 = code(x) tmp = 0.0; if ((x <= -2.5) || ~((x <= 2.4))) tmp = (x * (0.3333333333333333 * (x * x))) / 2.0; else tmp = x; end tmp_2 = tmp; end
code[x_] := If[Or[LessEqual[x, -2.5], N[Not[LessEqual[x, 2.4]], $MachinePrecision]], N[(N[(x * N[(0.3333333333333333 * N[(x * x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision], x]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -2.5 \lor \neg \left(x \leq 2.4\right):\\
\;\;\;\;\frac{x \cdot \left(0.3333333333333333 \cdot \left(x \cdot x\right)\right)}{2}\\
\mathbf{else}:\\
\;\;\;\;x\\
\end{array}
\end{array}
if x < -2.5 or 2.39999999999999991 < x Initial program 100.0%
Taylor expanded in x around 0 68.7%
unpow368.7%
associate-*r*68.7%
distribute-rgt-out68.7%
*-commutative68.7%
+-commutative68.7%
associate-*l*68.7%
fma-def68.7%
Simplified68.7%
Taylor expanded in x around inf 68.7%
unpow268.7%
Simplified68.7%
if -2.5 < x < 2.39999999999999991Initial program 5.8%
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 0 100.0%
Taylor expanded in x around 0 100.0%
Final simplification83.0%
(FPCore (x) :precision binary64 (/ (* x (+ (* 0.3333333333333333 (* x x)) 2.0)) 2.0))
double code(double x) {
return (x * ((0.3333333333333333 * (x * x)) + 2.0)) / 2.0;
}
real(8) function code(x)
real(8), intent (in) :: x
code = (x * ((0.3333333333333333d0 * (x * x)) + 2.0d0)) / 2.0d0
end function
public static double code(double x) {
return (x * ((0.3333333333333333 * (x * x)) + 2.0)) / 2.0;
}
def code(x): return (x * ((0.3333333333333333 * (x * x)) + 2.0)) / 2.0
function code(x) return Float64(Float64(x * Float64(Float64(0.3333333333333333 * Float64(x * x)) + 2.0)) / 2.0) end
function tmp = code(x) tmp = (x * ((0.3333333333333333 * (x * x)) + 2.0)) / 2.0; end
code[x_] := N[(N[(x * N[(N[(0.3333333333333333 * N[(x * x), $MachinePrecision]), $MachinePrecision] + 2.0), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]
\begin{array}{l}
\\
\frac{x \cdot \left(0.3333333333333333 \cdot \left(x \cdot x\right) + 2\right)}{2}
\end{array}
Initial program 56.9%
Taylor expanded in x around 0 83.0%
unpow383.0%
associate-*r*83.0%
distribute-rgt-out83.0%
*-commutative83.0%
+-commutative83.0%
associate-*l*83.0%
fma-def83.0%
Simplified83.0%
fma-udef83.0%
Applied egg-rr83.0%
Taylor expanded in x around 0 83.0%
unpow283.0%
Simplified83.0%
Final simplification83.0%
(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 56.9%
Taylor expanded in x around 0 48.9%
Final simplification48.9%
(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 56.9%
Taylor expanded in x around 0 83.0%
unpow383.0%
associate-*r*83.0%
distribute-rgt-out83.0%
*-commutative83.0%
+-commutative83.0%
associate-*l*83.0%
fma-def83.0%
Simplified83.0%
Taylor expanded in x around 0 48.9%
Taylor expanded in x around 0 48.6%
Final simplification48.6%
herbie shell --seed 2023214
(FPCore (x)
:name "Hyperbolic sine"
:precision binary64
(/ (- (exp x) (exp (- x))) 2.0))