
(FPCore (x) :precision binary64 (let* ((t_0 (sin (* x 0.5)))) (/ (* (* (/ 8.0 3.0) t_0) t_0) (sin x))))
double code(double x) {
double t_0 = sin((x * 0.5));
return (((8.0 / 3.0) * t_0) * t_0) / sin(x);
}
real(8) function code(x)
real(8), intent (in) :: x
real(8) :: t_0
t_0 = sin((x * 0.5d0))
code = (((8.0d0 / 3.0d0) * t_0) * t_0) / sin(x)
end function
public static double code(double x) {
double t_0 = Math.sin((x * 0.5));
return (((8.0 / 3.0) * t_0) * t_0) / Math.sin(x);
}
def code(x): t_0 = math.sin((x * 0.5)) return (((8.0 / 3.0) * t_0) * t_0) / math.sin(x)
function code(x) t_0 = sin(Float64(x * 0.5)) return Float64(Float64(Float64(Float64(8.0 / 3.0) * t_0) * t_0) / sin(x)) end
function tmp = code(x) t_0 = sin((x * 0.5)); tmp = (((8.0 / 3.0) * t_0) * t_0) / sin(x); end
code[x_] := Block[{t$95$0 = N[Sin[N[(x * 0.5), $MachinePrecision]], $MachinePrecision]}, N[(N[(N[(N[(8.0 / 3.0), $MachinePrecision] * t$95$0), $MachinePrecision] * t$95$0), $MachinePrecision] / N[Sin[x], $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \sin \left(x \cdot 0.5\right)\\
\frac{\left(\frac{8}{3} \cdot t\_0\right) \cdot t\_0}{\sin x}
\end{array}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 6 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x) :precision binary64 (let* ((t_0 (sin (* x 0.5)))) (/ (* (* (/ 8.0 3.0) t_0) t_0) (sin x))))
double code(double x) {
double t_0 = sin((x * 0.5));
return (((8.0 / 3.0) * t_0) * t_0) / sin(x);
}
real(8) function code(x)
real(8), intent (in) :: x
real(8) :: t_0
t_0 = sin((x * 0.5d0))
code = (((8.0d0 / 3.0d0) * t_0) * t_0) / sin(x)
end function
public static double code(double x) {
double t_0 = Math.sin((x * 0.5));
return (((8.0 / 3.0) * t_0) * t_0) / Math.sin(x);
}
def code(x): t_0 = math.sin((x * 0.5)) return (((8.0 / 3.0) * t_0) * t_0) / math.sin(x)
function code(x) t_0 = sin(Float64(x * 0.5)) return Float64(Float64(Float64(Float64(8.0 / 3.0) * t_0) * t_0) / sin(x)) end
function tmp = code(x) t_0 = sin((x * 0.5)); tmp = (((8.0 / 3.0) * t_0) * t_0) / sin(x); end
code[x_] := Block[{t$95$0 = N[Sin[N[(x * 0.5), $MachinePrecision]], $MachinePrecision]}, N[(N[(N[(N[(8.0 / 3.0), $MachinePrecision] * t$95$0), $MachinePrecision] * t$95$0), $MachinePrecision] / N[Sin[x], $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \sin \left(x \cdot 0.5\right)\\
\frac{\left(\frac{8}{3} \cdot t\_0\right) \cdot t\_0}{\sin x}
\end{array}
\end{array}
(FPCore (x) :precision binary64 (/ (* (tan (* 0.5 x)) 0.5) 0.375))
double code(double x) {
return (tan((0.5 * x)) * 0.5) / 0.375;
}
real(8) function code(x)
real(8), intent (in) :: x
code = (tan((0.5d0 * x)) * 0.5d0) / 0.375d0
end function
public static double code(double x) {
return (Math.tan((0.5 * x)) * 0.5) / 0.375;
}
def code(x): return (math.tan((0.5 * x)) * 0.5) / 0.375
function code(x) return Float64(Float64(tan(Float64(0.5 * x)) * 0.5) / 0.375) end
function tmp = code(x) tmp = (tan((0.5 * x)) * 0.5) / 0.375; end
code[x_] := N[(N[(N[Tan[N[(0.5 * x), $MachinePrecision]], $MachinePrecision] * 0.5), $MachinePrecision] / 0.375), $MachinePrecision]
\begin{array}{l}
\\
\frac{\tan \left(0.5 \cdot x\right) \cdot 0.5}{0.375}
\end{array}
Initial program 78.5%
Applied rewrites53.4%
Applied rewrites99.8%
lift-*.f64N/A
*-commutativeN/A
lower-*.f6499.8
lift-/.f64N/A
div-invN/A
metadata-evalN/A
lower-*.f6499.8
Applied rewrites99.8%
Final simplification99.8%
(FPCore (x) :precision binary64 (* (tan (* 0.5 x)) 1.3333333333333333))
double code(double x) {
return tan((0.5 * x)) * 1.3333333333333333;
}
real(8) function code(x)
real(8), intent (in) :: x
code = tan((0.5d0 * x)) * 1.3333333333333333d0
end function
public static double code(double x) {
return Math.tan((0.5 * x)) * 1.3333333333333333;
}
def code(x): return math.tan((0.5 * x)) * 1.3333333333333333
function code(x) return Float64(tan(Float64(0.5 * x)) * 1.3333333333333333) end
function tmp = code(x) tmp = tan((0.5 * x)) * 1.3333333333333333; end
code[x_] := N[(N[Tan[N[(0.5 * x), $MachinePrecision]], $MachinePrecision] * 1.3333333333333333), $MachinePrecision]
\begin{array}{l}
\\
\tan \left(0.5 \cdot x\right) \cdot 1.3333333333333333
\end{array}
Initial program 78.5%
Applied rewrites53.4%
Taylor expanded in x around inf
*-commutativeN/A
lower-*.f64N/A
hang-p0-tanN/A
*-rgt-identityN/A
associate-/l*N/A
metadata-evalN/A
*-commutativeN/A
lower-tan.f64N/A
lower-*.f6499.5
Applied rewrites99.5%
(FPCore (x) :precision binary64 (/ 2.6666666666666665 (/ (fma -0.3333333333333333 (* x x) 4.0) x)))
double code(double x) {
return 2.6666666666666665 / (fma(-0.3333333333333333, (x * x), 4.0) / x);
}
function code(x) return Float64(2.6666666666666665 / Float64(fma(-0.3333333333333333, Float64(x * x), 4.0) / x)) end
code[x_] := N[(2.6666666666666665 / N[(N[(-0.3333333333333333 * N[(x * x), $MachinePrecision] + 4.0), $MachinePrecision] / x), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{2.6666666666666665}{\frac{\mathsf{fma}\left(-0.3333333333333333, x \cdot x, 4\right)}{x}}
\end{array}
Initial program 78.5%
lift-/.f64N/A
lift-*.f64N/A
lift-*.f64N/A
associate-*l*N/A
*-commutativeN/A
associate-/l*N/A
lift-sin.f64N/A
lift-sin.f64N/A
sin-multN/A
clear-numN/A
frac-timesN/A
lift-/.f64N/A
metadata-evalN/A
metadata-evalN/A
metadata-evalN/A
lift-/.f64N/A
Applied rewrites53.5%
Taylor expanded in x around 0
lower-/.f64N/A
+-commutativeN/A
lower-fma.f64N/A
unpow2N/A
lower-*.f6450.6
Applied rewrites50.6%
(FPCore (x) :precision binary64 (/ (* 0.25 x) 0.375))
double code(double x) {
return (0.25 * x) / 0.375;
}
real(8) function code(x)
real(8), intent (in) :: x
code = (0.25d0 * x) / 0.375d0
end function
public static double code(double x) {
return (0.25 * x) / 0.375;
}
def code(x): return (0.25 * x) / 0.375
function code(x) return Float64(Float64(0.25 * x) / 0.375) end
function tmp = code(x) tmp = (0.25 * x) / 0.375; end
code[x_] := N[(N[(0.25 * x), $MachinePrecision] / 0.375), $MachinePrecision]
\begin{array}{l}
\\
\frac{0.25 \cdot x}{0.375}
\end{array}
Initial program 78.5%
Applied rewrites53.4%
Applied rewrites99.8%
Taylor expanded in x around 0
lower-*.f6450.1
Applied rewrites50.1%
(FPCore (x) :precision binary64 (* (* 0.25 x) 2.6666666666666665))
double code(double x) {
return (0.25 * x) * 2.6666666666666665;
}
real(8) function code(x)
real(8), intent (in) :: x
code = (0.25d0 * x) * 2.6666666666666665d0
end function
public static double code(double x) {
return (0.25 * x) * 2.6666666666666665;
}
def code(x): return (0.25 * x) * 2.6666666666666665
function code(x) return Float64(Float64(0.25 * x) * 2.6666666666666665) end
function tmp = code(x) tmp = (0.25 * x) * 2.6666666666666665; end
code[x_] := N[(N[(0.25 * x), $MachinePrecision] * 2.6666666666666665), $MachinePrecision]
\begin{array}{l}
\\
\left(0.25 \cdot x\right) \cdot 2.6666666666666665
\end{array}
Initial program 78.5%
Applied rewrites53.4%
Applied rewrites99.8%
Taylor expanded in x around 0
lower-*.f6450.1
Applied rewrites50.1%
lift-/.f64N/A
div-invN/A
metadata-evalN/A
lower-*.f6449.8
Applied rewrites49.8%
(FPCore (x) :precision binary64 (* 0.6666666666666666 x))
double code(double x) {
return 0.6666666666666666 * x;
}
real(8) function code(x)
real(8), intent (in) :: x
code = 0.6666666666666666d0 * x
end function
public static double code(double x) {
return 0.6666666666666666 * x;
}
def code(x): return 0.6666666666666666 * x
function code(x) return Float64(0.6666666666666666 * x) end
function tmp = code(x) tmp = 0.6666666666666666 * x; end
code[x_] := N[(0.6666666666666666 * x), $MachinePrecision]
\begin{array}{l}
\\
0.6666666666666666 \cdot x
\end{array}
Initial program 78.5%
Taylor expanded in x around 0
*-commutativeN/A
lower-*.f6449.8
Applied rewrites49.8%
Final simplification49.8%
(FPCore (x) :precision binary64 (let* ((t_0 (sin (* x 0.5)))) (/ (/ (* 8.0 t_0) 3.0) (/ (sin x) t_0))))
double code(double x) {
double t_0 = sin((x * 0.5));
return ((8.0 * t_0) / 3.0) / (sin(x) / t_0);
}
real(8) function code(x)
real(8), intent (in) :: x
real(8) :: t_0
t_0 = sin((x * 0.5d0))
code = ((8.0d0 * t_0) / 3.0d0) / (sin(x) / t_0)
end function
public static double code(double x) {
double t_0 = Math.sin((x * 0.5));
return ((8.0 * t_0) / 3.0) / (Math.sin(x) / t_0);
}
def code(x): t_0 = math.sin((x * 0.5)) return ((8.0 * t_0) / 3.0) / (math.sin(x) / t_0)
function code(x) t_0 = sin(Float64(x * 0.5)) return Float64(Float64(Float64(8.0 * t_0) / 3.0) / Float64(sin(x) / t_0)) end
function tmp = code(x) t_0 = sin((x * 0.5)); tmp = ((8.0 * t_0) / 3.0) / (sin(x) / t_0); end
code[x_] := Block[{t$95$0 = N[Sin[N[(x * 0.5), $MachinePrecision]], $MachinePrecision]}, N[(N[(N[(8.0 * t$95$0), $MachinePrecision] / 3.0), $MachinePrecision] / N[(N[Sin[x], $MachinePrecision] / t$95$0), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \sin \left(x \cdot 0.5\right)\\
\frac{\frac{8 \cdot t\_0}{3}}{\frac{\sin x}{t\_0}}
\end{array}
\end{array}
herbie shell --seed 2024270
(FPCore (x)
:name "Graphics.Rasterific.Svg.PathConverter:segmentToBezier from rasterific-svg-0.2.3.1, A"
:precision binary64
:alt
(! :herbie-platform default (/ (/ (* 8 (sin (* x 1/2))) 3) (/ (sin x) (sin (* x 1/2)))))
(/ (* (* (/ 8.0 3.0) (sin (* x 0.5))) (sin (* x 0.5))) (sin x)))