
(FPCore (x y) :precision binary64 (+ (+ (* x 2.0) (* x x)) (* y y)))
double code(double x, double y) {
return ((x * 2.0) + (x * x)) + (y * y);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = ((x * 2.0d0) + (x * x)) + (y * y)
end function
public static double code(double x, double y) {
return ((x * 2.0) + (x * x)) + (y * y);
}
def code(x, y): return ((x * 2.0) + (x * x)) + (y * y)
function code(x, y) return Float64(Float64(Float64(x * 2.0) + Float64(x * x)) + Float64(y * y)) end
function tmp = code(x, y) tmp = ((x * 2.0) + (x * x)) + (y * y); end
code[x_, y_] := N[(N[(N[(x * 2.0), $MachinePrecision] + N[(x * x), $MachinePrecision]), $MachinePrecision] + N[(y * y), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\left(x \cdot 2 + x \cdot x\right) + y \cdot y
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 6 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y) :precision binary64 (+ (+ (* x 2.0) (* x x)) (* y y)))
double code(double x, double y) {
return ((x * 2.0) + (x * x)) + (y * y);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = ((x * 2.0d0) + (x * x)) + (y * y)
end function
public static double code(double x, double y) {
return ((x * 2.0) + (x * x)) + (y * y);
}
def code(x, y): return ((x * 2.0) + (x * x)) + (y * y)
function code(x, y) return Float64(Float64(Float64(x * 2.0) + Float64(x * x)) + Float64(y * y)) end
function tmp = code(x, y) tmp = ((x * 2.0) + (x * x)) + (y * y); end
code[x_, y_] := N[(N[(N[(x * 2.0), $MachinePrecision] + N[(x * x), $MachinePrecision]), $MachinePrecision] + N[(y * y), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\left(x \cdot 2 + x \cdot x\right) + y \cdot y
\end{array}
(FPCore (x y) :precision binary64 (fma y y (* x (+ x 2.0))))
double code(double x, double y) {
return fma(y, y, (x * (x + 2.0)));
}
function code(x, y) return fma(y, y, Float64(x * Float64(x + 2.0))) end
code[x_, y_] := N[(y * y + N[(x * N[(x + 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(y, y, x \cdot \left(x + 2\right)\right)
\end{array}
Initial program 100.0%
distribute-lft-out100.0%
Simplified100.0%
+-commutative100.0%
fma-def100.0%
+-commutative100.0%
Applied egg-rr100.0%
Final simplification100.0%
(FPCore (x y)
:precision binary64
(if (<= (* y y) 6.2e-86)
(* x (+ x 2.0))
(if (<= (* y y) 1.16e+20)
(* y y)
(if (<= (* y y) 1.8e+124) (* x x) (* y y)))))
double code(double x, double y) {
double tmp;
if ((y * y) <= 6.2e-86) {
tmp = x * (x + 2.0);
} else if ((y * y) <= 1.16e+20) {
tmp = y * y;
} else if ((y * y) <= 1.8e+124) {
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) <= 6.2d-86) then
tmp = x * (x + 2.0d0)
else if ((y * y) <= 1.16d+20) then
tmp = y * y
else if ((y * y) <= 1.8d+124) 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) <= 6.2e-86) {
tmp = x * (x + 2.0);
} else if ((y * y) <= 1.16e+20) {
tmp = y * y;
} else if ((y * y) <= 1.8e+124) {
tmp = x * x;
} else {
tmp = y * y;
}
return tmp;
}
def code(x, y): tmp = 0 if (y * y) <= 6.2e-86: tmp = x * (x + 2.0) elif (y * y) <= 1.16e+20: tmp = y * y elif (y * y) <= 1.8e+124: tmp = x * x else: tmp = y * y return tmp
function code(x, y) tmp = 0.0 if (Float64(y * y) <= 6.2e-86) tmp = Float64(x * Float64(x + 2.0)); elseif (Float64(y * y) <= 1.16e+20) tmp = Float64(y * y); elseif (Float64(y * y) <= 1.8e+124) 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) <= 6.2e-86) tmp = x * (x + 2.0); elseif ((y * y) <= 1.16e+20) tmp = y * y; elseif ((y * y) <= 1.8e+124) tmp = x * x; else tmp = y * y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[N[(y * y), $MachinePrecision], 6.2e-86], N[(x * N[(x + 2.0), $MachinePrecision]), $MachinePrecision], If[LessEqual[N[(y * y), $MachinePrecision], 1.16e+20], N[(y * y), $MachinePrecision], If[LessEqual[N[(y * y), $MachinePrecision], 1.8e+124], N[(x * x), $MachinePrecision], N[(y * y), $MachinePrecision]]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \cdot y \leq 6.2 \cdot 10^{-86}:\\
\;\;\;\;x \cdot \left(x + 2\right)\\
\mathbf{elif}\;y \cdot y \leq 1.16 \cdot 10^{+20}:\\
\;\;\;\;y \cdot y\\
\mathbf{elif}\;y \cdot y \leq 1.8 \cdot 10^{+124}:\\
\;\;\;\;x \cdot x\\
\mathbf{else}:\\
\;\;\;\;y \cdot y\\
\end{array}
\end{array}
if (*.f64 y y) < 6.19999999999999977e-86Initial program 100.0%
distribute-lft-out100.0%
Simplified100.0%
Taylor expanded in y around 0 95.8%
if 6.19999999999999977e-86 < (*.f64 y y) < 1.16e20 or 1.79999999999999993e124 < (*.f64 y y) Initial program 100.0%
distribute-lft-out100.0%
Simplified100.0%
Taylor expanded in x around 0 82.6%
unpow282.6%
Simplified82.6%
if 1.16e20 < (*.f64 y y) < 1.79999999999999993e124Initial program 100.0%
distribute-lft-out100.0%
Simplified100.0%
Taylor expanded in x around inf 70.2%
unpow270.2%
Simplified70.2%
Final simplification87.0%
(FPCore (x y) :precision binary64 (if (<= x -1.2e+28) (* x x) (if (<= x 4.7e-26) (+ (* y y) (+ x x)) (* x (+ x 2.0)))))
double code(double x, double y) {
double tmp;
if (x <= -1.2e+28) {
tmp = x * x;
} else if (x <= 4.7e-26) {
tmp = (y * y) + (x + x);
} else {
tmp = x * (x + 2.0);
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (x <= (-1.2d+28)) then
tmp = x * x
else if (x <= 4.7d-26) then
tmp = (y * y) + (x + x)
else
tmp = x * (x + 2.0d0)
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -1.2e+28) {
tmp = x * x;
} else if (x <= 4.7e-26) {
tmp = (y * y) + (x + x);
} else {
tmp = x * (x + 2.0);
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.2e+28: tmp = x * x elif x <= 4.7e-26: tmp = (y * y) + (x + x) else: tmp = x * (x + 2.0) return tmp
function code(x, y) tmp = 0.0 if (x <= -1.2e+28) tmp = Float64(x * x); elseif (x <= 4.7e-26) tmp = Float64(Float64(y * y) + Float64(x + x)); else tmp = Float64(x * Float64(x + 2.0)); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -1.2e+28) tmp = x * x; elseif (x <= 4.7e-26) tmp = (y * y) + (x + x); else tmp = x * (x + 2.0); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.2e+28], N[(x * x), $MachinePrecision], If[LessEqual[x, 4.7e-26], N[(N[(y * y), $MachinePrecision] + N[(x + x), $MachinePrecision]), $MachinePrecision], N[(x * N[(x + 2.0), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.2 \cdot 10^{+28}:\\
\;\;\;\;x \cdot x\\
\mathbf{elif}\;x \leq 4.7 \cdot 10^{-26}:\\
\;\;\;\;y \cdot y + \left(x + x\right)\\
\mathbf{else}:\\
\;\;\;\;x \cdot \left(x + 2\right)\\
\end{array}
\end{array}
if x < -1.19999999999999991e28Initial program 100.0%
distribute-lft-out100.0%
Simplified100.0%
Taylor expanded in x around inf 86.2%
unpow286.2%
Simplified86.2%
if -1.19999999999999991e28 < x < 4.69999999999999989e-26Initial program 100.0%
distribute-lft-out100.0%
Simplified100.0%
Taylor expanded in x around 0 97.3%
count-297.3%
Simplified97.3%
if 4.69999999999999989e-26 < x Initial program 99.9%
distribute-lft-out100.0%
Simplified100.0%
Taylor expanded in y around 0 85.2%
Final simplification91.4%
(FPCore (x y) :precision binary64 (+ (* x (+ x 2.0)) (* y y)))
double code(double x, double y) {
return (x * (x + 2.0)) + (y * y);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (x * (x + 2.0d0)) + (y * y)
end function
public static double code(double x, double y) {
return (x * (x + 2.0)) + (y * y);
}
def code(x, y): return (x * (x + 2.0)) + (y * y)
function code(x, y) return Float64(Float64(x * Float64(x + 2.0)) + Float64(y * y)) end
function tmp = code(x, y) tmp = (x * (x + 2.0)) + (y * y); end
code[x_, y_] := N[(N[(x * N[(x + 2.0), $MachinePrecision]), $MachinePrecision] + N[(y * y), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x \cdot \left(x + 2\right) + y \cdot y
\end{array}
Initial program 100.0%
distribute-lft-out100.0%
Simplified100.0%
Final simplification100.0%
(FPCore (x y) :precision binary64 (if (<= x -1.38e+23) (* x x) (if (<= x 4.7e-26) (* y y) (* x x))))
double code(double x, double y) {
double tmp;
if (x <= -1.38e+23) {
tmp = x * x;
} else if (x <= 4.7e-26) {
tmp = y * y;
} else {
tmp = x * x;
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (x <= (-1.38d+23)) then
tmp = x * x
else if (x <= 4.7d-26) then
tmp = y * y
else
tmp = x * x
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -1.38e+23) {
tmp = x * x;
} else if (x <= 4.7e-26) {
tmp = y * y;
} else {
tmp = x * x;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.38e+23: tmp = x * x elif x <= 4.7e-26: tmp = y * y else: tmp = x * x return tmp
function code(x, y) tmp = 0.0 if (x <= -1.38e+23) tmp = Float64(x * x); elseif (x <= 4.7e-26) tmp = Float64(y * y); else tmp = Float64(x * x); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -1.38e+23) tmp = x * x; elseif (x <= 4.7e-26) tmp = y * y; else tmp = x * x; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.38e+23], N[(x * x), $MachinePrecision], If[LessEqual[x, 4.7e-26], N[(y * y), $MachinePrecision], N[(x * x), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.38 \cdot 10^{+23}:\\
\;\;\;\;x \cdot x\\
\mathbf{elif}\;x \leq 4.7 \cdot 10^{-26}:\\
\;\;\;\;y \cdot y\\
\mathbf{else}:\\
\;\;\;\;x \cdot x\\
\end{array}
\end{array}
if x < -1.38e23 or 4.69999999999999989e-26 < x Initial program 100.0%
distribute-lft-out100.0%
Simplified100.0%
Taylor expanded in x around inf 81.5%
unpow281.5%
Simplified81.5%
if -1.38e23 < x < 4.69999999999999989e-26Initial program 100.0%
distribute-lft-out100.0%
Simplified100.0%
Taylor expanded in x around 0 62.8%
unpow262.8%
Simplified62.8%
Final simplification72.3%
(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 100.0%
distribute-lft-out100.0%
Simplified100.0%
Taylor expanded in x around inf 43.5%
unpow243.5%
Simplified43.5%
Final simplification43.5%
(FPCore (x y) :precision binary64 (+ (* y y) (+ (* 2.0 x) (* x x))))
double code(double x, double y) {
return (y * y) + ((2.0 * x) + (x * x));
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (y * y) + ((2.0d0 * x) + (x * x))
end function
public static double code(double x, double y) {
return (y * y) + ((2.0 * x) + (x * x));
}
def code(x, y): return (y * y) + ((2.0 * x) + (x * x))
function code(x, y) return Float64(Float64(y * y) + Float64(Float64(2.0 * x) + Float64(x * x))) end
function tmp = code(x, y) tmp = (y * y) + ((2.0 * x) + (x * x)); end
code[x_, y_] := N[(N[(y * y), $MachinePrecision] + N[(N[(2.0 * x), $MachinePrecision] + N[(x * x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
y \cdot y + \left(2 \cdot x + x \cdot x\right)
\end{array}
herbie shell --seed 2023171
(FPCore (x y)
:name "Numeric.Log:$clog1p from log-domain-0.10.2.1, A"
:precision binary64
:herbie-target
(+ (* y y) (+ (* 2.0 x) (* x x)))
(+ (+ (* x 2.0) (* x x)) (* y y)))