
(FPCore (x y) :precision binary64 (+ (+ x y) x))
double code(double x, double y) {
return (x + y) + x;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (x + y) + x
end function
public static double code(double x, double y) {
return (x + y) + x;
}
def code(x, y): return (x + y) + x
function code(x, y) return Float64(Float64(x + y) + x) end
function tmp = code(x, y) tmp = (x + y) + x; end
code[x_, y_] := N[(N[(x + y), $MachinePrecision] + x), $MachinePrecision]
\begin{array}{l}
\\
\left(x + y\right) + x
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 3 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y) :precision binary64 (+ (+ x y) x))
double code(double x, double y) {
return (x + y) + x;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (x + y) + x
end function
public static double code(double x, double y) {
return (x + y) + x;
}
def code(x, y): return (x + y) + x
function code(x, y) return Float64(Float64(x + y) + x) end
function tmp = code(x, y) tmp = (x + y) + x; end
code[x_, y_] := N[(N[(x + y), $MachinePrecision] + x), $MachinePrecision]
\begin{array}{l}
\\
\left(x + y\right) + x
\end{array}
(FPCore (x y) :precision binary64 (+ y (* x 2.0)))
double code(double x, double y) {
return y + (x * 2.0);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = y + (x * 2.0d0)
end function
public static double code(double x, double y) {
return y + (x * 2.0);
}
def code(x, y): return y + (x * 2.0)
function code(x, y) return Float64(y + Float64(x * 2.0)) end
function tmp = code(x, y) tmp = y + (x * 2.0); end
code[x_, y_] := N[(y + N[(x * 2.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
y + x \cdot 2
\end{array}
Initial program 100.0%
Simplified0
(FPCore (x y)
:precision binary64
(if (<= x -3.8e+79)
(* 2.0 x)
(if (<= x -2.5e+28)
y
(if (<= x -8.5e-47) (* 2.0 x) (if (<= x 6e-35) y (* 2.0 x))))))
double code(double x, double y) {
double tmp;
if (x <= -3.8e+79) {
tmp = 2.0 * x;
} else if (x <= -2.5e+28) {
tmp = y;
} else if (x <= -8.5e-47) {
tmp = 2.0 * x;
} else if (x <= 6e-35) {
tmp = y;
} else {
tmp = 2.0 * x;
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (x <= (-3.8d+79)) then
tmp = 2.0d0 * x
else if (x <= (-2.5d+28)) then
tmp = y
else if (x <= (-8.5d-47)) then
tmp = 2.0d0 * x
else if (x <= 6d-35) then
tmp = y
else
tmp = 2.0d0 * x
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -3.8e+79) {
tmp = 2.0 * x;
} else if (x <= -2.5e+28) {
tmp = y;
} else if (x <= -8.5e-47) {
tmp = 2.0 * x;
} else if (x <= 6e-35) {
tmp = y;
} else {
tmp = 2.0 * x;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -3.8e+79: tmp = 2.0 * x elif x <= -2.5e+28: tmp = y elif x <= -8.5e-47: tmp = 2.0 * x elif x <= 6e-35: tmp = y else: tmp = 2.0 * x return tmp
function code(x, y) tmp = 0.0 if (x <= -3.8e+79) tmp = Float64(2.0 * x); elseif (x <= -2.5e+28) tmp = y; elseif (x <= -8.5e-47) tmp = Float64(2.0 * x); elseif (x <= 6e-35) tmp = y; else tmp = Float64(2.0 * x); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -3.8e+79) tmp = 2.0 * x; elseif (x <= -2.5e+28) tmp = y; elseif (x <= -8.5e-47) tmp = 2.0 * x; elseif (x <= 6e-35) tmp = y; else tmp = 2.0 * x; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -3.8e+79], N[(2.0 * x), $MachinePrecision], If[LessEqual[x, -2.5e+28], y, If[LessEqual[x, -8.5e-47], N[(2.0 * x), $MachinePrecision], If[LessEqual[x, 6e-35], y, N[(2.0 * x), $MachinePrecision]]]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -3.8 \cdot 10^{+79}:\\
\;\;\;\;2 \cdot x\\
\mathbf{elif}\;x \leq -2.5 \cdot 10^{+28}:\\
\;\;\;\;y\\
\mathbf{elif}\;x \leq -8.5 \cdot 10^{-47}:\\
\;\;\;\;2 \cdot x\\
\mathbf{elif}\;x \leq 6 \cdot 10^{-35}:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;2 \cdot x\\
\end{array}
\end{array}
if x < -3.8000000000000002e79 or -2.49999999999999979e28 < x < -8.4999999999999999e-47 or 5.99999999999999978e-35 < x Initial program 100.0%
Simplified0
Taylor expanded in y around 0 0
Simplified0
if -3.8000000000000002e79 < x < -2.49999999999999979e28 or -8.4999999999999999e-47 < x < 5.99999999999999978e-35Initial program 100.0%
Simplified0
Taylor expanded in y around inf 0
Simplified0
(FPCore (x y) :precision binary64 y)
double code(double x, double y) {
return y;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = y
end function
public static double code(double x, double y) {
return y;
}
def code(x, y): return y
function code(x, y) return y end
function tmp = code(x, y) tmp = y; end
code[x_, y_] := y
\begin{array}{l}
\\
y
\end{array}
Initial program 100.0%
Simplified0
Taylor expanded in y around inf 0
Simplified0
(FPCore (x y) :precision binary64 (+ y (* 2.0 x)))
double code(double x, double y) {
return y + (2.0 * x);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = y + (2.0d0 * x)
end function
public static double code(double x, double y) {
return y + (2.0 * x);
}
def code(x, y): return y + (2.0 * x)
function code(x, y) return Float64(y + Float64(2.0 * x)) end
function tmp = code(x, y) tmp = y + (2.0 * x); end
code[x_, y_] := N[(y + N[(2.0 * x), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
y + 2 \cdot x
\end{array}
herbie shell --seed 2024110
(FPCore (x y)
:name "Graphics.Rendering.Plot.Render.Plot.Legend:renderLegendOutside from plot-0.2.3.4, A"
:precision binary64
:alt
(+ y (* 2.0 x))
(+ (+ x y) x))