
(FPCore (x y) :precision binary64 (+ (+ (+ (* x x) (* y y)) (* y y)) (* y y)))
double code(double x, double y) {
return (((x * x) + (y * y)) + (y * y)) + (y * y);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (((x * x) + (y * y)) + (y * y)) + (y * y)
end function
public static double code(double x, double y) {
return (((x * x) + (y * y)) + (y * y)) + (y * y);
}
def code(x, y): return (((x * x) + (y * y)) + (y * y)) + (y * y)
function code(x, y) return Float64(Float64(Float64(Float64(x * x) + Float64(y * y)) + Float64(y * y)) + Float64(y * y)) end
function tmp = code(x, y) tmp = (((x * x) + (y * y)) + (y * y)) + (y * y); end
code[x_, y_] := N[(N[(N[(N[(x * x), $MachinePrecision] + N[(y * y), $MachinePrecision]), $MachinePrecision] + N[(y * y), $MachinePrecision]), $MachinePrecision] + N[(y * y), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\left(\left(x \cdot x + y \cdot y\right) + y \cdot y\right) + y \cdot y
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 5 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y) :precision binary64 (+ (+ (+ (* x x) (* y y)) (* y y)) (* y y)))
double code(double x, double y) {
return (((x * x) + (y * y)) + (y * y)) + (y * y);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (((x * x) + (y * y)) + (y * y)) + (y * y)
end function
public static double code(double x, double y) {
return (((x * x) + (y * y)) + (y * y)) + (y * y);
}
def code(x, y): return (((x * x) + (y * y)) + (y * y)) + (y * y)
function code(x, y) return Float64(Float64(Float64(Float64(x * x) + Float64(y * y)) + Float64(y * y)) + Float64(y * y)) end
function tmp = code(x, y) tmp = (((x * x) + (y * y)) + (y * y)) + (y * y); end
code[x_, y_] := N[(N[(N[(N[(x * x), $MachinePrecision] + N[(y * y), $MachinePrecision]), $MachinePrecision] + N[(y * y), $MachinePrecision]), $MachinePrecision] + N[(y * y), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\left(\left(x \cdot x + y \cdot y\right) + y \cdot y\right) + y \cdot y
\end{array}
(FPCore (x y) :precision binary64 (fma x x (* 3.0 (* y y))))
double code(double x, double y) {
return fma(x, x, (3.0 * (y * y)));
}
function code(x, y) return fma(x, x, Float64(3.0 * Float64(y * y))) end
code[x_, y_] := N[(x * x + N[(3.0 * N[(y * y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(x, x, 3 \cdot \left(y \cdot y\right)\right)
\end{array}
Initial program 99.9%
Taylor expanded in x around 0
+-commutativeN/A
associate-+r+N/A
distribute-lft1-inN/A
metadata-evalN/A
unpow2N/A
associate-*r*N/A
*-commutativeN/A
lower-fma.f64N/A
*-commutativeN/A
lower-*.f64N/A
unpow2N/A
lower-*.f6499.9
Simplified99.9%
Taylor expanded in y around 0
+-commutativeN/A
unpow2N/A
lower-fma.f64N/A
lower-*.f64N/A
unpow2N/A
lower-*.f6499.9
Simplified99.9%
(FPCore (x y) :precision binary64 (if (<= (* x x) 1e-214) (* 3.0 (* y y)) (fma x x (* y y))))
double code(double x, double y) {
double tmp;
if ((x * x) <= 1e-214) {
tmp = 3.0 * (y * y);
} else {
tmp = fma(x, x, (y * y));
}
return tmp;
}
function code(x, y) tmp = 0.0 if (Float64(x * x) <= 1e-214) tmp = Float64(3.0 * Float64(y * y)); else tmp = fma(x, x, Float64(y * y)); end return tmp end
code[x_, y_] := If[LessEqual[N[(x * x), $MachinePrecision], 1e-214], N[(3.0 * N[(y * y), $MachinePrecision]), $MachinePrecision], N[(x * x + N[(y * y), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \cdot x \leq 10^{-214}:\\
\;\;\;\;3 \cdot \left(y \cdot y\right)\\
\mathbf{else}:\\
\;\;\;\;\mathsf{fma}\left(x, x, y \cdot y\right)\\
\end{array}
\end{array}
if (*.f64 x x) < 9.99999999999999913e-215Initial program 99.8%
Taylor expanded in x around 0
+-commutativeN/A
associate-+r+N/A
distribute-lft1-inN/A
metadata-evalN/A
unpow2N/A
associate-*r*N/A
*-commutativeN/A
lower-fma.f64N/A
*-commutativeN/A
lower-*.f64N/A
unpow2N/A
lower-*.f6499.7
Simplified99.7%
Taylor expanded in y around inf
lower-*.f64N/A
unpow2N/A
lower-*.f6497.0
Simplified97.0%
if 9.99999999999999913e-215 < (*.f64 x x) Initial program 99.9%
Taylor expanded in x around inf
unpow2N/A
lower-*.f6488.6
Simplified88.6%
Taylor expanded in x around 0
unpow2N/A
lower-fma.f64N/A
unpow2N/A
lower-*.f6488.7
Simplified88.7%
(FPCore (x y) :precision binary64 (if (<= (* y y) 1e+25) (* x x) (* 3.0 (* y y))))
double code(double x, double y) {
double tmp;
if ((y * y) <= 1e+25) {
tmp = x * x;
} else {
tmp = 3.0 * (y * y);
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if ((y * y) <= 1d+25) then
tmp = x * x
else
tmp = 3.0d0 * (y * y)
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if ((y * y) <= 1e+25) {
tmp = x * x;
} else {
tmp = 3.0 * (y * y);
}
return tmp;
}
def code(x, y): tmp = 0 if (y * y) <= 1e+25: tmp = x * x else: tmp = 3.0 * (y * y) return tmp
function code(x, y) tmp = 0.0 if (Float64(y * y) <= 1e+25) tmp = Float64(x * x); else tmp = Float64(3.0 * Float64(y * y)); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if ((y * y) <= 1e+25) tmp = x * x; else tmp = 3.0 * (y * y); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[N[(y * y), $MachinePrecision], 1e+25], N[(x * x), $MachinePrecision], N[(3.0 * N[(y * y), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \cdot y \leq 10^{+25}:\\
\;\;\;\;x \cdot x\\
\mathbf{else}:\\
\;\;\;\;3 \cdot \left(y \cdot y\right)\\
\end{array}
\end{array}
if (*.f64 y y) < 1.00000000000000009e25Initial program 99.9%
Taylor expanded in x around inf
unpow2N/A
lower-*.f6482.7
Simplified82.7%
if 1.00000000000000009e25 < (*.f64 y y) Initial program 99.8%
Taylor expanded in x around 0
+-commutativeN/A
associate-+r+N/A
distribute-lft1-inN/A
metadata-evalN/A
unpow2N/A
associate-*r*N/A
*-commutativeN/A
lower-fma.f64N/A
*-commutativeN/A
lower-*.f64N/A
unpow2N/A
lower-*.f6499.8
Simplified99.8%
Taylor expanded in y around inf
lower-*.f64N/A
unpow2N/A
lower-*.f6482.4
Simplified82.4%
(FPCore (x y) :precision binary64 (if (<= (* y y) 2.6e+293) (* x x) (* y y)))
double code(double x, double y) {
double tmp;
if ((y * y) <= 2.6e+293) {
tmp = x * x;
} else {
tmp = y * y;
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if ((y * y) <= 2.6d+293) then
tmp = x * x
else
tmp = y * y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if ((y * y) <= 2.6e+293) {
tmp = x * x;
} else {
tmp = y * y;
}
return tmp;
}
def code(x, y): tmp = 0 if (y * y) <= 2.6e+293: tmp = x * x else: tmp = y * y return tmp
function code(x, y) tmp = 0.0 if (Float64(y * y) <= 2.6e+293) tmp = Float64(x * x); else tmp = Float64(y * y); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if ((y * y) <= 2.6e+293) tmp = x * x; else tmp = y * y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[N[(y * y), $MachinePrecision], 2.6e+293], N[(x * x), $MachinePrecision], N[(y * y), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \cdot y \leq 2.6 \cdot 10^{+293}:\\
\;\;\;\;x \cdot x\\
\mathbf{else}:\\
\;\;\;\;y \cdot y\\
\end{array}
\end{array}
if (*.f64 y y) < 2.5999999999999999e293Initial program 99.9%
Taylor expanded in x around inf
unpow2N/A
lower-*.f6469.4
Simplified69.4%
if 2.5999999999999999e293 < (*.f64 y y) Initial program 99.9%
Taylor expanded in x around inf
unpow2N/A
lower-*.f6493.0
Simplified93.0%
Taylor expanded in x around 0
unpow2N/A
lower-*.f6493.0
Simplified93.0%
(FPCore (x y) :precision binary64 (* x x))
double code(double x, double y) {
return x * x;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = x * x
end function
public static double code(double x, double y) {
return x * x;
}
def code(x, y): return x * x
function code(x, y) return Float64(x * x) end
function tmp = code(x, y) tmp = x * x; end
code[x_, y_] := N[(x * x), $MachinePrecision]
\begin{array}{l}
\\
x \cdot x
\end{array}
Initial program 99.9%
Taylor expanded in x around inf
unpow2N/A
lower-*.f6458.2
Simplified58.2%
(FPCore (x y) :precision binary64 (+ (* x x) (* y (+ y (+ y y)))))
double code(double x, double y) {
return (x * x) + (y * (y + (y + y)));
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (x * x) + (y * (y + (y + y)))
end function
public static double code(double x, double y) {
return (x * x) + (y * (y + (y + y)));
}
def code(x, y): return (x * x) + (y * (y + (y + y)))
function code(x, y) return Float64(Float64(x * x) + Float64(y * Float64(y + Float64(y + y)))) end
function tmp = code(x, y) tmp = (x * x) + (y * (y + (y + y))); end
code[x_, y_] := N[(N[(x * x), $MachinePrecision] + N[(y * N[(y + N[(y + y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x \cdot x + y \cdot \left(y + \left(y + y\right)\right)
\end{array}
herbie shell --seed 2024215
(FPCore (x y)
:name "Linear.Quaternion:$c/ from linear-1.19.1.3, E"
:precision binary64
:alt
(! :herbie-platform default (+ (* x x) (* y (+ y (+ y y)))))
(+ (+ (+ (* x x) (* y y)) (* y y)) (* y y)))