
(FPCore (v t) :precision binary64 (/ (- 1.0 (* 5.0 (* v v))) (* (* (* PI t) (sqrt (* 2.0 (- 1.0 (* 3.0 (* v v)))))) (- 1.0 (* v v)))))
double code(double v, double t) {
return (1.0 - (5.0 * (v * v))) / (((((double) M_PI) * t) * sqrt((2.0 * (1.0 - (3.0 * (v * v)))))) * (1.0 - (v * v)));
}
public static double code(double v, double t) {
return (1.0 - (5.0 * (v * v))) / (((Math.PI * t) * Math.sqrt((2.0 * (1.0 - (3.0 * (v * v)))))) * (1.0 - (v * v)));
}
def code(v, t): return (1.0 - (5.0 * (v * v))) / (((math.pi * t) * math.sqrt((2.0 * (1.0 - (3.0 * (v * v)))))) * (1.0 - (v * v)))
function code(v, t) return Float64(Float64(1.0 - Float64(5.0 * Float64(v * v))) / Float64(Float64(Float64(pi * t) * sqrt(Float64(2.0 * Float64(1.0 - Float64(3.0 * Float64(v * v)))))) * Float64(1.0 - Float64(v * v)))) end
function tmp = code(v, t) tmp = (1.0 - (5.0 * (v * v))) / (((pi * t) * sqrt((2.0 * (1.0 - (3.0 * (v * v)))))) * (1.0 - (v * v))); end
code[v_, t_] := N[(N[(1.0 - N[(5.0 * N[(v * v), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / N[(N[(N[(Pi * t), $MachinePrecision] * N[Sqrt[N[(2.0 * N[(1.0 - N[(3.0 * N[(v * v), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] * N[(1.0 - N[(v * v), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{1 - 5 \cdot \left(v \cdot v\right)}{\left(\left(\pi \cdot t\right) \cdot \sqrt{2 \cdot \left(1 - 3 \cdot \left(v \cdot v\right)\right)}\right) \cdot \left(1 - v \cdot v\right)}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 8 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (v t) :precision binary64 (/ (- 1.0 (* 5.0 (* v v))) (* (* (* PI t) (sqrt (* 2.0 (- 1.0 (* 3.0 (* v v)))))) (- 1.0 (* v v)))))
double code(double v, double t) {
return (1.0 - (5.0 * (v * v))) / (((((double) M_PI) * t) * sqrt((2.0 * (1.0 - (3.0 * (v * v)))))) * (1.0 - (v * v)));
}
public static double code(double v, double t) {
return (1.0 - (5.0 * (v * v))) / (((Math.PI * t) * Math.sqrt((2.0 * (1.0 - (3.0 * (v * v)))))) * (1.0 - (v * v)));
}
def code(v, t): return (1.0 - (5.0 * (v * v))) / (((math.pi * t) * math.sqrt((2.0 * (1.0 - (3.0 * (v * v)))))) * (1.0 - (v * v)))
function code(v, t) return Float64(Float64(1.0 - Float64(5.0 * Float64(v * v))) / Float64(Float64(Float64(pi * t) * sqrt(Float64(2.0 * Float64(1.0 - Float64(3.0 * Float64(v * v)))))) * Float64(1.0 - Float64(v * v)))) end
function tmp = code(v, t) tmp = (1.0 - (5.0 * (v * v))) / (((pi * t) * sqrt((2.0 * (1.0 - (3.0 * (v * v)))))) * (1.0 - (v * v))); end
code[v_, t_] := N[(N[(1.0 - N[(5.0 * N[(v * v), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / N[(N[(N[(Pi * t), $MachinePrecision] * N[Sqrt[N[(2.0 * N[(1.0 - N[(3.0 * N[(v * v), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] * N[(1.0 - N[(v * v), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{1 - 5 \cdot \left(v \cdot v\right)}{\left(\left(\pi \cdot t\right) \cdot \sqrt{2 \cdot \left(1 - 3 \cdot \left(v \cdot v\right)\right)}\right) \cdot \left(1 - v \cdot v\right)}
\end{array}
(FPCore (v t) :precision binary64 (/ (/ (fma -5.0 (* v v) 1.0) PI) (* (sqrt (fma -6.0 (* v v) 2.0)) (* (- 1.0 (* v v)) t))))
double code(double v, double t) {
return (fma(-5.0, (v * v), 1.0) / ((double) M_PI)) / (sqrt(fma(-6.0, (v * v), 2.0)) * ((1.0 - (v * v)) * t));
}
function code(v, t) return Float64(Float64(fma(-5.0, Float64(v * v), 1.0) / pi) / Float64(sqrt(fma(-6.0, Float64(v * v), 2.0)) * Float64(Float64(1.0 - Float64(v * v)) * t))) end
code[v_, t_] := N[(N[(N[(-5.0 * N[(v * v), $MachinePrecision] + 1.0), $MachinePrecision] / Pi), $MachinePrecision] / N[(N[Sqrt[N[(-6.0 * N[(v * v), $MachinePrecision] + 2.0), $MachinePrecision]], $MachinePrecision] * N[(N[(1.0 - N[(v * v), $MachinePrecision]), $MachinePrecision] * t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{\frac{\mathsf{fma}\left(-5, v \cdot v, 1\right)}{\pi}}{\sqrt{\mathsf{fma}\left(-6, v \cdot v, 2\right)} \cdot \left(\left(1 - v \cdot v\right) \cdot t\right)}
\end{array}
Initial program 99.4%
lift-/.f64N/A
lift-*.f64N/A
associate-/r*N/A
div-invN/A
lift-*.f64N/A
lift-*.f64N/A
associate-*l*N/A
associate-/r*N/A
frac-timesN/A
Applied rewrites99.6%
Applied rewrites99.6%
lift-/.f64N/A
lift-neg.f64N/A
distribute-frac-neg2N/A
distribute-frac-negN/A
lift-fma.f64N/A
+-commutativeN/A
distribute-neg-inN/A
metadata-evalN/A
sub-negN/A
lift-*.f64N/A
lower-/.f64N/A
lift-*.f64N/A
sub-negN/A
+-commutativeN/A
distribute-lft-neg-inN/A
lower-fma.f64N/A
metadata-eval99.6
Applied rewrites99.6%
Final simplification99.6%
(FPCore (v t) :precision binary64 (/ (- 1.0 (* 5.0 (* v v))) (* (* (* (sqrt (fma -6.0 (* v v) 2.0)) PI) t) (- 1.0 (* v v)))))
double code(double v, double t) {
return (1.0 - (5.0 * (v * v))) / (((sqrt(fma(-6.0, (v * v), 2.0)) * ((double) M_PI)) * t) * (1.0 - (v * v)));
}
function code(v, t) return Float64(Float64(1.0 - Float64(5.0 * Float64(v * v))) / Float64(Float64(Float64(sqrt(fma(-6.0, Float64(v * v), 2.0)) * pi) * t) * Float64(1.0 - Float64(v * v)))) end
code[v_, t_] := N[(N[(1.0 - N[(5.0 * N[(v * v), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / N[(N[(N[(N[Sqrt[N[(-6.0 * N[(v * v), $MachinePrecision] + 2.0), $MachinePrecision]], $MachinePrecision] * Pi), $MachinePrecision] * t), $MachinePrecision] * N[(1.0 - N[(v * v), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{1 - 5 \cdot \left(v \cdot v\right)}{\left(\left(\sqrt{\mathsf{fma}\left(-6, v \cdot v, 2\right)} \cdot \pi\right) \cdot t\right) \cdot \left(1 - v \cdot v\right)}
\end{array}
Initial program 99.4%
lift-*.f64N/A
*-commutativeN/A
lift-*.f64N/A
associate-*r*N/A
lower-*.f64N/A
Applied rewrites99.5%
(FPCore (v t) :precision binary64 (/ (fma 5.0 (* v v) -1.0) (* (* (fma (* t v) v (- t)) PI) (sqrt (fma -6.0 (* v v) 2.0)))))
double code(double v, double t) {
return fma(5.0, (v * v), -1.0) / ((fma((t * v), v, -t) * ((double) M_PI)) * sqrt(fma(-6.0, (v * v), 2.0)));
}
function code(v, t) return Float64(fma(5.0, Float64(v * v), -1.0) / Float64(Float64(fma(Float64(t * v), v, Float64(-t)) * pi) * sqrt(fma(-6.0, Float64(v * v), 2.0)))) end
code[v_, t_] := N[(N[(5.0 * N[(v * v), $MachinePrecision] + -1.0), $MachinePrecision] / N[(N[(N[(N[(t * v), $MachinePrecision] * v + (-t)), $MachinePrecision] * Pi), $MachinePrecision] * N[Sqrt[N[(-6.0 * N[(v * v), $MachinePrecision] + 2.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{\mathsf{fma}\left(5, v \cdot v, -1\right)}{\left(\mathsf{fma}\left(t \cdot v, v, -t\right) \cdot \pi\right) \cdot \sqrt{\mathsf{fma}\left(-6, v \cdot v, 2\right)}}
\end{array}
Initial program 99.4%
lift-/.f64N/A
frac-2negN/A
lower-/.f64N/A
lift--.f64N/A
sub-negN/A
+-commutativeN/A
distribute-neg-inN/A
remove-double-negN/A
lift-*.f64N/A
metadata-evalN/A
lower-fma.f64N/A
lift-*.f64N/A
lift-*.f64N/A
associate-*l*N/A
Applied rewrites99.4%
Taylor expanded in v around 0
+-commutativeN/A
associate-*r*N/A
associate-*r*N/A
distribute-rgt-outN/A
lower-*.f64N/A
lower-PI.f64N/A
unpow2N/A
associate-*r*N/A
lower-fma.f64N/A
lower-*.f64N/A
mul-1-negN/A
lower-neg.f6499.4
Applied rewrites99.4%
Final simplification99.4%
(FPCore (v t) :precision binary64 (/ (fma 5.0 (* v v) -1.0) (* (* (* (fma v v -1.0) PI) t) (sqrt (fma -6.0 (* v v) 2.0)))))
double code(double v, double t) {
return fma(5.0, (v * v), -1.0) / (((fma(v, v, -1.0) * ((double) M_PI)) * t) * sqrt(fma(-6.0, (v * v), 2.0)));
}
function code(v, t) return Float64(fma(5.0, Float64(v * v), -1.0) / Float64(Float64(Float64(fma(v, v, -1.0) * pi) * t) * sqrt(fma(-6.0, Float64(v * v), 2.0)))) end
code[v_, t_] := N[(N[(5.0 * N[(v * v), $MachinePrecision] + -1.0), $MachinePrecision] / N[(N[(N[(N[(v * v + -1.0), $MachinePrecision] * Pi), $MachinePrecision] * t), $MachinePrecision] * N[Sqrt[N[(-6.0 * N[(v * v), $MachinePrecision] + 2.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{\mathsf{fma}\left(5, v \cdot v, -1\right)}{\left(\left(\mathsf{fma}\left(v, v, -1\right) \cdot \pi\right) \cdot t\right) \cdot \sqrt{\mathsf{fma}\left(-6, v \cdot v, 2\right)}}
\end{array}
Initial program 99.4%
lift-/.f64N/A
frac-2negN/A
lower-/.f64N/A
lift--.f64N/A
sub-negN/A
+-commutativeN/A
distribute-neg-inN/A
remove-double-negN/A
lift-*.f64N/A
metadata-evalN/A
lower-fma.f64N/A
lift-*.f64N/A
lift-*.f64N/A
associate-*l*N/A
Applied rewrites99.4%
Taylor expanded in v around 0
+-commutativeN/A
associate-*r*N/A
associate-*r*N/A
distribute-rgt-outN/A
lower-*.f64N/A
lower-PI.f64N/A
unpow2N/A
associate-*r*N/A
lower-fma.f64N/A
lower-*.f64N/A
mul-1-negN/A
lower-neg.f6499.4
Applied rewrites99.4%
Taylor expanded in v around 0
+-commutativeN/A
*-commutativeN/A
associate-*r*N/A
*-commutativeN/A
distribute-lft-inN/A
metadata-evalN/A
sub-negN/A
associate-*r*N/A
*-commutativeN/A
lower-*.f64N/A
*-commutativeN/A
lower-*.f64N/A
sub-negN/A
unpow2N/A
metadata-evalN/A
lower-fma.f64N/A
lower-PI.f6499.4
Applied rewrites99.4%
(FPCore (v t) :precision binary64 (/ (/ 1.0 (* (sqrt 2.0) PI)) t))
double code(double v, double t) {
return (1.0 / (sqrt(2.0) * ((double) M_PI))) / t;
}
public static double code(double v, double t) {
return (1.0 / (Math.sqrt(2.0) * Math.PI)) / t;
}
def code(v, t): return (1.0 / (math.sqrt(2.0) * math.pi)) / t
function code(v, t) return Float64(Float64(1.0 / Float64(sqrt(2.0) * pi)) / t) end
function tmp = code(v, t) tmp = (1.0 / (sqrt(2.0) * pi)) / t; end
code[v_, t_] := N[(N[(1.0 / N[(N[Sqrt[2.0], $MachinePrecision] * Pi), $MachinePrecision]), $MachinePrecision] / t), $MachinePrecision]
\begin{array}{l}
\\
\frac{\frac{1}{\sqrt{2} \cdot \pi}}{t}
\end{array}
Initial program 99.4%
Taylor expanded in v around 0
lower-/.f64N/A
*-commutativeN/A
lower-*.f64N/A
*-commutativeN/A
lower-*.f64N/A
lower-sqrt.f64N/A
lower-PI.f6498.7
Applied rewrites98.7%
Applied rewrites99.1%
(FPCore (v t) :precision binary64 (/ 1.0 (* (* (sqrt 2.0) PI) t)))
double code(double v, double t) {
return 1.0 / ((sqrt(2.0) * ((double) M_PI)) * t);
}
public static double code(double v, double t) {
return 1.0 / ((Math.sqrt(2.0) * Math.PI) * t);
}
def code(v, t): return 1.0 / ((math.sqrt(2.0) * math.pi) * t)
function code(v, t) return Float64(1.0 / Float64(Float64(sqrt(2.0) * pi) * t)) end
function tmp = code(v, t) tmp = 1.0 / ((sqrt(2.0) * pi) * t); end
code[v_, t_] := N[(1.0 / N[(N[(N[Sqrt[2.0], $MachinePrecision] * Pi), $MachinePrecision] * t), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{1}{\left(\sqrt{2} \cdot \pi\right) \cdot t}
\end{array}
Initial program 99.4%
Taylor expanded in v around 0
lower-/.f64N/A
*-commutativeN/A
lower-*.f64N/A
*-commutativeN/A
lower-*.f64N/A
lower-sqrt.f64N/A
lower-PI.f6498.7
Applied rewrites98.7%
(FPCore (v t) :precision binary64 (/ 1.0 (* (* t PI) (sqrt 2.0))))
double code(double v, double t) {
return 1.0 / ((t * ((double) M_PI)) * sqrt(2.0));
}
public static double code(double v, double t) {
return 1.0 / ((t * Math.PI) * Math.sqrt(2.0));
}
def code(v, t): return 1.0 / ((t * math.pi) * math.sqrt(2.0))
function code(v, t) return Float64(1.0 / Float64(Float64(t * pi) * sqrt(2.0))) end
function tmp = code(v, t) tmp = 1.0 / ((t * pi) * sqrt(2.0)); end
code[v_, t_] := N[(1.0 / N[(N[(t * Pi), $MachinePrecision] * N[Sqrt[2.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{1}{\left(t \cdot \pi\right) \cdot \sqrt{2}}
\end{array}
Initial program 99.4%
Taylor expanded in v around 0
lower-/.f64N/A
*-commutativeN/A
lower-*.f64N/A
*-commutativeN/A
lower-*.f64N/A
lower-sqrt.f64N/A
lower-PI.f6498.7
Applied rewrites98.7%
Applied rewrites98.6%
(FPCore (v t) :precision binary64 (/ (sqrt 0.5) (* t PI)))
double code(double v, double t) {
return sqrt(0.5) / (t * ((double) M_PI));
}
public static double code(double v, double t) {
return Math.sqrt(0.5) / (t * Math.PI);
}
def code(v, t): return math.sqrt(0.5) / (t * math.pi)
function code(v, t) return Float64(sqrt(0.5) / Float64(t * pi)) end
function tmp = code(v, t) tmp = sqrt(0.5) / (t * pi); end
code[v_, t_] := N[(N[Sqrt[0.5], $MachinePrecision] / N[(t * Pi), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{\sqrt{0.5}}{t \cdot \pi}
\end{array}
Initial program 99.4%
lift-*.f64N/A
lift-*.f64N/A
associate-*l*N/A
*-commutativeN/A
lower-*.f64N/A
Applied rewrites99.3%
Taylor expanded in v around 0
lower-/.f64N/A
lower-sqrt.f64N/A
*-commutativeN/A
lower-*.f64N/A
lower-PI.f6498.2
Applied rewrites98.2%
Final simplification98.2%
herbie shell --seed 2024235
(FPCore (v t)
:name "Falkner and Boettcher, Equation (20:1,3)"
:precision binary64
(/ (- 1.0 (* 5.0 (* v v))) (* (* (* PI t) (sqrt (* 2.0 (- 1.0 (* 3.0 (* v v)))))) (- 1.0 (* v v)))))