
(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 (+ (* 2.0 x) y))
double code(double x, double y) {
return (2.0 * x) + y;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (2.0d0 * x) + y
end function
public static double code(double x, double y) {
return (2.0 * x) + y;
}
def code(x, y): return (2.0 * x) + y
function code(x, y) return Float64(Float64(2.0 * x) + y) end
function tmp = code(x, y) tmp = (2.0 * x) + y; end
code[x_, y_] := N[(N[(2.0 * x), $MachinePrecision] + y), $MachinePrecision]
\begin{array}{l}
\\
2 \cdot x + y
\end{array}
Initial program 100.0%
Taylor expanded in x around 0 100.0%
Final simplification100.0%
(FPCore (x y)
:precision binary64
(if (<= y -2.2e+17)
y
(if (<= y 9e-58)
(+ x x)
(if (<= y 6e+96) y (if (<= y 6.8e+105) (+ x x) y)))))
double code(double x, double y) {
double tmp;
if (y <= -2.2e+17) {
tmp = y;
} else if (y <= 9e-58) {
tmp = x + x;
} else if (y <= 6e+96) {
tmp = y;
} else if (y <= 6.8e+105) {
tmp = x + x;
} else {
tmp = y;
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (y <= (-2.2d+17)) then
tmp = y
else if (y <= 9d-58) then
tmp = x + x
else if (y <= 6d+96) then
tmp = y
else if (y <= 6.8d+105) then
tmp = x + x
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (y <= -2.2e+17) {
tmp = y;
} else if (y <= 9e-58) {
tmp = x + x;
} else if (y <= 6e+96) {
tmp = y;
} else if (y <= 6.8e+105) {
tmp = x + x;
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if y <= -2.2e+17: tmp = y elif y <= 9e-58: tmp = x + x elif y <= 6e+96: tmp = y elif y <= 6.8e+105: tmp = x + x else: tmp = y return tmp
function code(x, y) tmp = 0.0 if (y <= -2.2e+17) tmp = y; elseif (y <= 9e-58) tmp = Float64(x + x); elseif (y <= 6e+96) tmp = y; elseif (y <= 6.8e+105) tmp = Float64(x + x); else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (y <= -2.2e+17) tmp = y; elseif (y <= 9e-58) tmp = x + x; elseif (y <= 6e+96) tmp = y; elseif (y <= 6.8e+105) tmp = x + x; else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, -2.2e+17], y, If[LessEqual[y, 9e-58], N[(x + x), $MachinePrecision], If[LessEqual[y, 6e+96], y, If[LessEqual[y, 6.8e+105], N[(x + x), $MachinePrecision], y]]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -2.2 \cdot 10^{+17}:\\
\;\;\;\;y\\
\mathbf{elif}\;y \leq 9 \cdot 10^{-58}:\\
\;\;\;\;x + x\\
\mathbf{elif}\;y \leq 6 \cdot 10^{+96}:\\
\;\;\;\;y\\
\mathbf{elif}\;y \leq 6.8 \cdot 10^{+105}:\\
\;\;\;\;x + x\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if y < -2.2e17 or 9.0000000000000006e-58 < y < 6.0000000000000001e96 or 6.7999999999999999e105 < y Initial program 100.0%
Taylor expanded in x around 0 84.2%
if -2.2e17 < y < 9.0000000000000006e-58 or 6.0000000000000001e96 < y < 6.7999999999999999e105Initial program 100.0%
Taylor expanded in x around inf 78.0%
count-278.0%
Simplified78.0%
Final simplification81.1%
(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%
Taylor expanded in x around 0 55.1%
Final simplification55.1%
(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 2023224
(FPCore (x y)
:name "Graphics.Rendering.Plot.Render.Plot.Legend:renderLegendOutside from plot-0.2.3.4, A"
:precision binary64
:herbie-target
(+ y (* 2.0 x))
(+ (+ x y) x))