
(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%
+-commutativeN/A
associate-+l+N/A
+-lowering-+.f64N/A
count-2N/A
*-commutativeN/A
*-lowering-*.f64100.0%
Simplified100.0%
(FPCore (x y) :precision binary64 (if (<= y -2.3e+37) y (if (<= y 2.9e+108) (* x 2.0) y)))
double code(double x, double y) {
double tmp;
if (y <= -2.3e+37) {
tmp = y;
} else if (y <= 2.9e+108) {
tmp = x * 2.0;
} 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 <= (-2.3d+37)) then
tmp = y
else if (y <= 2.9d+108) then
tmp = x * 2.0d0
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (y <= -2.3e+37) {
tmp = y;
} else if (y <= 2.9e+108) {
tmp = x * 2.0;
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if y <= -2.3e+37: tmp = y elif y <= 2.9e+108: tmp = x * 2.0 else: tmp = y return tmp
function code(x, y) tmp = 0.0 if (y <= -2.3e+37) tmp = y; elseif (y <= 2.9e+108) tmp = Float64(x * 2.0); else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (y <= -2.3e+37) tmp = y; elseif (y <= 2.9e+108) tmp = x * 2.0; else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, -2.3e+37], y, If[LessEqual[y, 2.9e+108], N[(x * 2.0), $MachinePrecision], y]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -2.3 \cdot 10^{+37}:\\
\;\;\;\;y\\
\mathbf{elif}\;y \leq 2.9 \cdot 10^{+108}:\\
\;\;\;\;x \cdot 2\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if y < -2.30000000000000002e37 or 2.90000000000000007e108 < y Initial program 100.0%
+-commutativeN/A
associate-+l+N/A
+-lowering-+.f64N/A
count-2N/A
*-commutativeN/A
*-lowering-*.f64100.0%
Simplified100.0%
Taylor expanded in y around inf
Simplified86.3%
if -2.30000000000000002e37 < y < 2.90000000000000007e108Initial program 100.0%
+-commutativeN/A
associate-+l+N/A
+-lowering-+.f64N/A
count-2N/A
*-commutativeN/A
*-lowering-*.f64100.0%
Simplified100.0%
Taylor expanded in y around 0
*-lowering-*.f6476.5%
Simplified76.5%
Final simplification80.3%
(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%
+-commutativeN/A
associate-+l+N/A
+-lowering-+.f64N/A
count-2N/A
*-commutativeN/A
*-lowering-*.f64100.0%
Simplified100.0%
Taylor expanded in y around inf
Simplified49.0%
(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 2024152
(FPCore (x y)
:name "Graphics.Rendering.Plot.Render.Plot.Legend:renderLegendOutside from plot-0.2.3.4, A"
:precision binary64
:alt
(! :herbie-platform default (+ y (* 2 x)))
(+ (+ x y) x))