
(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 (<= x -1.45e+103)
(+ x x)
(if (<= x -9e+42)
y
(if (<= x -1.25e-30) (+ x x) (if (<= x 7.2e+63) y (+ x x))))))
double code(double x, double y) {
double tmp;
if (x <= -1.45e+103) {
tmp = x + x;
} else if (x <= -9e+42) {
tmp = y;
} else if (x <= -1.25e-30) {
tmp = x + x;
} else if (x <= 7.2e+63) {
tmp = 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 <= (-1.45d+103)) then
tmp = x + x
else if (x <= (-9d+42)) then
tmp = y
else if (x <= (-1.25d-30)) then
tmp = x + x
else if (x <= 7.2d+63) then
tmp = y
else
tmp = x + x
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -1.45e+103) {
tmp = x + x;
} else if (x <= -9e+42) {
tmp = y;
} else if (x <= -1.25e-30) {
tmp = x + x;
} else if (x <= 7.2e+63) {
tmp = y;
} else {
tmp = x + x;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.45e+103: tmp = x + x elif x <= -9e+42: tmp = y elif x <= -1.25e-30: tmp = x + x elif x <= 7.2e+63: tmp = y else: tmp = x + x return tmp
function code(x, y) tmp = 0.0 if (x <= -1.45e+103) tmp = Float64(x + x); elseif (x <= -9e+42) tmp = y; elseif (x <= -1.25e-30) tmp = Float64(x + x); elseif (x <= 7.2e+63) tmp = y; else tmp = Float64(x + x); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -1.45e+103) tmp = x + x; elseif (x <= -9e+42) tmp = y; elseif (x <= -1.25e-30) tmp = x + x; elseif (x <= 7.2e+63) tmp = y; else tmp = x + x; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.45e+103], N[(x + x), $MachinePrecision], If[LessEqual[x, -9e+42], y, If[LessEqual[x, -1.25e-30], N[(x + x), $MachinePrecision], If[LessEqual[x, 7.2e+63], y, N[(x + x), $MachinePrecision]]]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.45 \cdot 10^{+103}:\\
\;\;\;\;x + x\\
\mathbf{elif}\;x \leq -9 \cdot 10^{+42}:\\
\;\;\;\;y\\
\mathbf{elif}\;x \leq -1.25 \cdot 10^{-30}:\\
\;\;\;\;x + x\\
\mathbf{elif}\;x \leq 7.2 \cdot 10^{+63}:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;x + x\\
\end{array}
\end{array}
if x < -1.4499999999999999e103 or -9.00000000000000025e42 < x < -1.24999999999999993e-30 or 7.19999999999999998e63 < x Initial program 100.0%
Taylor expanded in x around inf 80.0%
count-280.0%
Simplified80.0%
if -1.4499999999999999e103 < x < -9.00000000000000025e42 or -1.24999999999999993e-30 < x < 7.19999999999999998e63Initial program 100.0%
Taylor expanded in x around 0 78.4%
Final simplification79.1%
(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 52.4%
Final simplification52.4%
(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 2023192
(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))