
(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 4 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 79.4%
associate-*r/99.2%
associate-*l*99.3%
metadata-eval99.3%
Simplified99.3%
associate-*r/79.5%
associate-*r/79.4%
expm1-log1p-u65.8%
associate-*l/65.8%
expm1-udef40.2%
Applied egg-rr39.0%
expm1-def39.1%
expm1-log1p52.7%
associate-*r/52.6%
associate-*l/52.7%
metadata-eval52.7%
metadata-eval52.7%
distribute-lft-neg-in52.7%
distribute-rgt-neg-in52.7%
distribute-lft-in52.7%
sub-neg52.7%
cos-052.7%
metadata-eval52.7%
associate-/r/52.7%
associate-/l*52.7%
*-lft-identity52.7%
times-frac52.6%
*-commutative52.6%
times-frac52.7%
metadata-eval52.7%
Simplified99.5%
tan-quot99.4%
div-inv99.4%
metadata-eval99.4%
div-inv99.4%
div-inv99.4%
metadata-eval99.4%
Applied egg-rr99.4%
associate-*r*99.3%
*-commutative99.3%
metadata-eval99.3%
div-inv99.6%
associate-*l/99.6%
un-div-inv99.7%
quot-tan99.7%
Applied egg-rr99.7%
Final simplification99.7%
(FPCore (x) :precision binary64 (* 1.3333333333333333 (tan (/ x 2.0))))
double code(double x) {
return 1.3333333333333333 * tan((x / 2.0));
}
real(8) function code(x)
real(8), intent (in) :: x
code = 1.3333333333333333d0 * tan((x / 2.0d0))
end function
public static double code(double x) {
return 1.3333333333333333 * Math.tan((x / 2.0));
}
def code(x): return 1.3333333333333333 * math.tan((x / 2.0))
function code(x) return Float64(1.3333333333333333 * tan(Float64(x / 2.0))) end
function tmp = code(x) tmp = 1.3333333333333333 * tan((x / 2.0)); end
code[x_] := N[(1.3333333333333333 * N[Tan[N[(x / 2.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
1.3333333333333333 \cdot \tan \left(\frac{x}{2}\right)
\end{array}
Initial program 79.4%
associate-*r/99.2%
associate-*l*99.3%
metadata-eval99.3%
Simplified99.3%
associate-*r/79.5%
associate-*r/79.4%
expm1-log1p-u65.8%
associate-*l/65.8%
expm1-udef40.2%
Applied egg-rr39.0%
expm1-def39.1%
expm1-log1p52.7%
associate-*r/52.6%
associate-*l/52.7%
metadata-eval52.7%
metadata-eval52.7%
distribute-lft-neg-in52.7%
distribute-rgt-neg-in52.7%
distribute-lft-in52.7%
sub-neg52.7%
cos-052.7%
metadata-eval52.7%
associate-/r/52.7%
associate-/l*52.7%
*-lft-identity52.7%
times-frac52.6%
*-commutative52.6%
times-frac52.7%
metadata-eval52.7%
Simplified99.5%
Final simplification99.5%
(FPCore (x) :precision binary64 (* 2.6666666666666665 (/ 1.0 (+ (* x -0.3333333333333333) (* 4.0 (/ 1.0 x))))))
double code(double x) {
return 2.6666666666666665 * (1.0 / ((x * -0.3333333333333333) + (4.0 * (1.0 / x))));
}
real(8) function code(x)
real(8), intent (in) :: x
code = 2.6666666666666665d0 * (1.0d0 / ((x * (-0.3333333333333333d0)) + (4.0d0 * (1.0d0 / x))))
end function
public static double code(double x) {
return 2.6666666666666665 * (1.0 / ((x * -0.3333333333333333) + (4.0 * (1.0 / x))));
}
def code(x): return 2.6666666666666665 * (1.0 / ((x * -0.3333333333333333) + (4.0 * (1.0 / x))))
function code(x) return Float64(2.6666666666666665 * Float64(1.0 / Float64(Float64(x * -0.3333333333333333) + Float64(4.0 * Float64(1.0 / x))))) end
function tmp = code(x) tmp = 2.6666666666666665 * (1.0 / ((x * -0.3333333333333333) + (4.0 * (1.0 / x)))); end
code[x_] := N[(2.6666666666666665 * N[(1.0 / N[(N[(x * -0.3333333333333333), $MachinePrecision] + N[(4.0 * N[(1.0 / x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
2.6666666666666665 \cdot \frac{1}{x \cdot -0.3333333333333333 + 4 \cdot \frac{1}{x}}
\end{array}
Initial program 79.4%
associate-*r/99.2%
associate-*l*99.3%
metadata-eval99.3%
Simplified99.3%
associate-*r/79.5%
clear-num79.4%
sqr-sin-a52.7%
cancel-sign-sub-inv52.7%
metadata-eval52.7%
*-commutative52.7%
associate-*r*52.7%
metadata-eval52.7%
*-un-lft-identity52.7%
Applied egg-rr52.7%
Taylor expanded in x around 0 51.3%
Final simplification51.3%
(FPCore (x) :precision binary64 (* x 0.6666666666666666))
double code(double x) {
return x * 0.6666666666666666;
}
real(8) function code(x)
real(8), intent (in) :: x
code = x * 0.6666666666666666d0
end function
public static double code(double x) {
return x * 0.6666666666666666;
}
def code(x): return x * 0.6666666666666666
function code(x) return Float64(x * 0.6666666666666666) end
function tmp = code(x) tmp = x * 0.6666666666666666; end
code[x_] := N[(x * 0.6666666666666666), $MachinePrecision]
\begin{array}{l}
\\
x \cdot 0.6666666666666666
\end{array}
Initial program 79.4%
associate-*r/99.2%
associate-*l*99.3%
metadata-eval99.3%
Simplified99.3%
Taylor expanded in x around 0 50.8%
Final simplification50.8%
(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 2023174
(FPCore (x)
:name "Graphics.Rasterific.Svg.PathConverter:segmentToBezier from rasterific-svg-0.2.3.1, A"
:precision binary64
:herbie-target
(/ (/ (* 8.0 (sin (* x 0.5))) 3.0) (/ (sin x) (sin (* x 0.5))))
(/ (* (* (/ 8.0 3.0) (sin (* x 0.5))) (sin (* x 0.5))) (sin x)))