
(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 5 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 (* x 0.5)) 0.75))
double code(double x) {
return tan((x * 0.5)) / 0.75;
}
real(8) function code(x)
real(8), intent (in) :: x
code = tan((x * 0.5d0)) / 0.75d0
end function
public static double code(double x) {
return Math.tan((x * 0.5)) / 0.75;
}
def code(x): return math.tan((x * 0.5)) / 0.75
function code(x) return Float64(tan(Float64(x * 0.5)) / 0.75) end
function tmp = code(x) tmp = tan((x * 0.5)) / 0.75; end
code[x_] := N[(N[Tan[N[(x * 0.5), $MachinePrecision]], $MachinePrecision] / 0.75), $MachinePrecision]
\begin{array}{l}
\\
\frac{\tan \left(x \cdot 0.5\right)}{0.75}
\end{array}
Initial program 77.4%
lift-/.f64N/A
clear-numN/A
lift-*.f64N/A
lift-*.f64N/A
associate-*l*N/A
associate-/r*N/A
clear-numN/A
lift-sin.f64N/A
lift-sin.f64N/A
sin-multN/A
div-invN/A
metadata-evalN/A
associate-/l*N/A
Applied rewrites54.2%
lift-*.f64N/A
lift-/.f64N/A
frac-2negN/A
metadata-evalN/A
associate-*r/N/A
*-commutativeN/A
lift--.f64N/A
sub-negN/A
distribute-rgt-inN/A
metadata-evalN/A
metadata-evalN/A
distribute-lft-neg-inN/A
distribute-neg-inN/A
+-commutativeN/A
lift-fma.f64N/A
frac-2negN/A
lift-*.f64N/A
associate-/l/N/A
lift-/.f64N/A
lift-/.f6454.2
Applied rewrites99.8%
lift-/.f64N/A
lift-*.f64N/A
associate-/l*N/A
metadata-evalN/A
metadata-evalN/A
div-invN/A
lower-/.f6499.8
lift-/.f64N/A
clear-numN/A
associate-/r/N/A
metadata-evalN/A
lower-*.f6499.8
Applied rewrites99.8%
Final simplification99.8%
(FPCore (x) :precision binary64 (* 1.3333333333333333 (tan (* x 0.5))))
double code(double x) {
return 1.3333333333333333 * tan((x * 0.5));
}
real(8) function code(x)
real(8), intent (in) :: x
code = 1.3333333333333333d0 * tan((x * 0.5d0))
end function
public static double code(double x) {
return 1.3333333333333333 * Math.tan((x * 0.5));
}
def code(x): return 1.3333333333333333 * math.tan((x * 0.5))
function code(x) return Float64(1.3333333333333333 * tan(Float64(x * 0.5))) end
function tmp = code(x) tmp = 1.3333333333333333 * tan((x * 0.5)); end
code[x_] := N[(1.3333333333333333 * N[Tan[N[(x * 0.5), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
1.3333333333333333 \cdot \tan \left(x \cdot 0.5\right)
\end{array}
Initial program 76.9%
lift-/.f64N/A
clear-numN/A
associate-/r/N/A
remove-double-negN/A
lift-*.f64N/A
lift-*.f64N/A
associate-*l*N/A
distribute-rgt-neg-inN/A
distribute-lft-neg-inN/A
associate-*r*N/A
lower-*.f64N/A
Applied rewrites52.7%
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%
Final simplification99.5%
(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 2024230
(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)))