
(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 y y (fma x x (* y (+ y y)))))
double code(double x, double y) {
return fma(y, y, fma(x, x, (y * (y + y))));
}
function code(x, y) return fma(y, y, fma(x, x, Float64(y * Float64(y + y)))) end
code[x_, y_] := N[(y * y + N[(x * x + N[(y * N[(y + y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(y, y, \mathsf{fma}\left(x, x, y \cdot \left(y + y\right)\right)\right)
\end{array}
Initial program 99.9%
+-commutative99.9%
fma-def100.0%
associate-+l+100.0%
fma-def100.0%
distribute-lft-out100.0%
Simplified100.0%
Final simplification100.0%
(FPCore (x y)
:precision binary64
(if (<= (* y y) 5e-177)
(* x x)
(if (<= (* y y) 5e-79)
(* 3.0 (* y y))
(if (<= (* y y) 2e+96) (* x x) (* y (* y 3.0))))))
double code(double x, double y) {
double tmp;
if ((y * y) <= 5e-177) {
tmp = x * x;
} else if ((y * y) <= 5e-79) {
tmp = 3.0 * (y * y);
} else if ((y * y) <= 2e+96) {
tmp = x * x;
} else {
tmp = y * (y * 3.0);
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if ((y * y) <= 5d-177) then
tmp = x * x
else if ((y * y) <= 5d-79) then
tmp = 3.0d0 * (y * y)
else if ((y * y) <= 2d+96) then
tmp = x * x
else
tmp = y * (y * 3.0d0)
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if ((y * y) <= 5e-177) {
tmp = x * x;
} else if ((y * y) <= 5e-79) {
tmp = 3.0 * (y * y);
} else if ((y * y) <= 2e+96) {
tmp = x * x;
} else {
tmp = y * (y * 3.0);
}
return tmp;
}
def code(x, y): tmp = 0 if (y * y) <= 5e-177: tmp = x * x elif (y * y) <= 5e-79: tmp = 3.0 * (y * y) elif (y * y) <= 2e+96: tmp = x * x else: tmp = y * (y * 3.0) return tmp
function code(x, y) tmp = 0.0 if (Float64(y * y) <= 5e-177) tmp = Float64(x * x); elseif (Float64(y * y) <= 5e-79) tmp = Float64(3.0 * Float64(y * y)); elseif (Float64(y * y) <= 2e+96) tmp = Float64(x * x); else tmp = Float64(y * Float64(y * 3.0)); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if ((y * y) <= 5e-177) tmp = x * x; elseif ((y * y) <= 5e-79) tmp = 3.0 * (y * y); elseif ((y * y) <= 2e+96) tmp = x * x; else tmp = y * (y * 3.0); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[N[(y * y), $MachinePrecision], 5e-177], N[(x * x), $MachinePrecision], If[LessEqual[N[(y * y), $MachinePrecision], 5e-79], N[(3.0 * N[(y * y), $MachinePrecision]), $MachinePrecision], If[LessEqual[N[(y * y), $MachinePrecision], 2e+96], N[(x * x), $MachinePrecision], N[(y * N[(y * 3.0), $MachinePrecision]), $MachinePrecision]]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \cdot y \leq 5 \cdot 10^{-177}:\\
\;\;\;\;x \cdot x\\
\mathbf{elif}\;y \cdot y \leq 5 \cdot 10^{-79}:\\
\;\;\;\;3 \cdot \left(y \cdot y\right)\\
\mathbf{elif}\;y \cdot y \leq 2 \cdot 10^{+96}:\\
\;\;\;\;x \cdot x\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(y \cdot 3\right)\\
\end{array}
\end{array}
if (*.f64 y y) < 5e-177 or 4.99999999999999999e-79 < (*.f64 y y) < 2.0000000000000001e96Initial program 99.9%
Taylor expanded in x around inf 88.2%
unpow288.2%
Simplified88.2%
if 5e-177 < (*.f64 y y) < 4.99999999999999999e-79Initial program 99.8%
Taylor expanded in x around 0 71.1%
unpow271.1%
*-commutative71.1%
associate-*l*71.1%
*-commutative71.1%
count-271.1%
Simplified71.1%
distribute-lft-out71.0%
count-271.0%
metadata-eval71.0%
*-un-lft-identity71.0%
distribute-rgt-out71.0%
metadata-eval71.0%
metadata-eval71.0%
associate-*r*71.1%
Applied egg-rr71.1%
if 2.0000000000000001e96 < (*.f64 y y) Initial program 99.8%
Taylor expanded in x around 0 86.9%
unpow286.9%
unpow286.9%
distribute-rgt1-in86.9%
metadata-eval86.9%
*-commutative86.9%
associate-*r*87.0%
Simplified87.0%
Final simplification86.2%
(FPCore (x y) :precision binary64 (if (or (<= y 3.9e-88) (and (not (<= y 1.2e-38)) (<= y 1.6e+48))) (* x x) (* y (* y 3.0))))
double code(double x, double y) {
double tmp;
if ((y <= 3.9e-88) || (!(y <= 1.2e-38) && (y <= 1.6e+48))) {
tmp = x * x;
} else {
tmp = y * (y * 3.0);
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if ((y <= 3.9d-88) .or. (.not. (y <= 1.2d-38)) .and. (y <= 1.6d+48)) then
tmp = x * x
else
tmp = y * (y * 3.0d0)
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if ((y <= 3.9e-88) || (!(y <= 1.2e-38) && (y <= 1.6e+48))) {
tmp = x * x;
} else {
tmp = y * (y * 3.0);
}
return tmp;
}
def code(x, y): tmp = 0 if (y <= 3.9e-88) or (not (y <= 1.2e-38) and (y <= 1.6e+48)): tmp = x * x else: tmp = y * (y * 3.0) return tmp
function code(x, y) tmp = 0.0 if ((y <= 3.9e-88) || (!(y <= 1.2e-38) && (y <= 1.6e+48))) tmp = Float64(x * x); else tmp = Float64(y * Float64(y * 3.0)); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if ((y <= 3.9e-88) || (~((y <= 1.2e-38)) && (y <= 1.6e+48))) tmp = x * x; else tmp = y * (y * 3.0); end tmp_2 = tmp; end
code[x_, y_] := If[Or[LessEqual[y, 3.9e-88], And[N[Not[LessEqual[y, 1.2e-38]], $MachinePrecision], LessEqual[y, 1.6e+48]]], N[(x * x), $MachinePrecision], N[(y * N[(y * 3.0), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq 3.9 \cdot 10^{-88} \lor \neg \left(y \leq 1.2 \cdot 10^{-38}\right) \land y \leq 1.6 \cdot 10^{+48}:\\
\;\;\;\;x \cdot x\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(y \cdot 3\right)\\
\end{array}
\end{array}
if y < 3.89999999999999992e-88 or 1.20000000000000011e-38 < y < 1.6000000000000001e48Initial program 99.9%
Taylor expanded in x around inf 68.5%
unpow268.5%
Simplified68.5%
if 3.89999999999999992e-88 < y < 1.20000000000000011e-38 or 1.6000000000000001e48 < y Initial program 99.7%
Taylor expanded in x around 0 83.2%
unpow283.2%
unpow283.2%
distribute-rgt1-in83.2%
metadata-eval83.2%
*-commutative83.2%
associate-*r*83.4%
Simplified83.4%
Final simplification72.4%
(FPCore (x y) :precision binary64 (+ (* y (* y 3.0)) (* x x)))
double code(double x, double y) {
return (y * (y * 3.0)) + (x * x);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (y * (y * 3.0d0)) + (x * x)
end function
public static double code(double x, double y) {
return (y * (y * 3.0)) + (x * x);
}
def code(x, y): return (y * (y * 3.0)) + (x * x)
function code(x, y) return Float64(Float64(y * Float64(y * 3.0)) + Float64(x * x)) end
function tmp = code(x, y) tmp = (y * (y * 3.0)) + (x * x); end
code[x_, y_] := N[(N[(y * N[(y * 3.0), $MachinePrecision]), $MachinePrecision] + N[(x * x), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
y \cdot \left(y \cdot 3\right) + x \cdot x
\end{array}
Initial program 99.9%
associate-+l+99.9%
associate-+l+99.9%
fma-def99.9%
count-299.9%
distribute-rgt1-in99.9%
*-commutative99.9%
metadata-eval99.9%
Simplified99.9%
fma-udef99.9%
+-commutative99.9%
associate-*l*99.9%
Applied egg-rr99.9%
Final simplification99.9%
(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 58.6%
unpow258.6%
Simplified58.6%
Final simplification58.6%
(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]), $MachinePrecision]
\begin{array}{l}
\\
x \cdot x + y \cdot \left(y + \left(y + y\right)\right)
\end{array}
herbie shell --seed 2023221
(FPCore (x y)
:name "Linear.Quaternion:$c/ from linear-1.19.1.3, E"
:precision binary64
:herbie-target
(+ (* x x) (* y (+ y (+ y y))))
(+ (+ (+ (* x x) (* y y)) (* y y)) (* y y)))