
(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 6 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 (fma x 2.0 y))
double code(double x, double y) {
return fma(x, 2.0, y);
}
function code(x, y) return fma(x, 2.0, y) end
code[x_, y_] := N[(x * 2.0 + y), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(x, 2, y\right)
\end{array}
Initial program 100.0%
Taylor expanded in x around 0
+-commutativeN/A
*-rgt-identityN/A
*-inversesN/A
associate-/l*N/A
associate-*l/N/A
associate-*r/N/A
associate-*r/N/A
*-commutativeN/A
associate-/l*N/A
associate-*l*N/A
accelerator-lowering-fma.f64N/A
associate-*l/N/A
*-rgt-identityN/A
*-inversesN/A
associate-/l*N/A
associate-/r/N/A
associate-*l/N/A
associate-*r*N/A
associate-/l*N/A
*-inversesN/A
metadata-eval100.0
Simplified100.0%
(FPCore (x y) :precision binary64 (if (<= y -3.2e+56) (+ x y) (if (<= y 6e-70) (+ x x) (+ x y))))
double code(double x, double y) {
double tmp;
if (y <= -3.2e+56) {
tmp = x + y;
} else if (y <= 6e-70) {
tmp = x + x;
} else {
tmp = x + y;
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (y <= (-3.2d+56)) then
tmp = x + y
else if (y <= 6d-70) then
tmp = x + x
else
tmp = x + y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (y <= -3.2e+56) {
tmp = x + y;
} else if (y <= 6e-70) {
tmp = x + x;
} else {
tmp = x + y;
}
return tmp;
}
def code(x, y): tmp = 0 if y <= -3.2e+56: tmp = x + y elif y <= 6e-70: tmp = x + x else: tmp = x + y return tmp
function code(x, y) tmp = 0.0 if (y <= -3.2e+56) tmp = Float64(x + y); elseif (y <= 6e-70) tmp = Float64(x + x); else tmp = Float64(x + y); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (y <= -3.2e+56) tmp = x + y; elseif (y <= 6e-70) tmp = x + x; else tmp = x + y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, -3.2e+56], N[(x + y), $MachinePrecision], If[LessEqual[y, 6e-70], N[(x + x), $MachinePrecision], N[(x + y), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -3.2 \cdot 10^{+56}:\\
\;\;\;\;x + y\\
\mathbf{elif}\;y \leq 6 \cdot 10^{-70}:\\
\;\;\;\;x + x\\
\mathbf{else}:\\
\;\;\;\;x + y\\
\end{array}
\end{array}
if y < -3.20000000000000003e56 or 6.0000000000000003e-70 < y Initial program 100.0%
Taylor expanded in x around 0
Simplified80.5%
if -3.20000000000000003e56 < y < 6.0000000000000003e-70Initial program 99.9%
Taylor expanded in x around inf
Simplified82.8%
Final simplification81.6%
(FPCore (x y) :precision binary64 (if (<= y -5.4e+72) y (if (<= y 5e-19) (+ x x) y)))
double code(double x, double y) {
double tmp;
if (y <= -5.4e+72) {
tmp = y;
} else if (y <= 5e-19) {
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 <= (-5.4d+72)) then
tmp = y
else if (y <= 5d-19) 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 <= -5.4e+72) {
tmp = y;
} else if (y <= 5e-19) {
tmp = x + x;
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if y <= -5.4e+72: tmp = y elif y <= 5e-19: tmp = x + x else: tmp = y return tmp
function code(x, y) tmp = 0.0 if (y <= -5.4e+72) tmp = y; elseif (y <= 5e-19) tmp = Float64(x + x); else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (y <= -5.4e+72) tmp = y; elseif (y <= 5e-19) tmp = x + x; else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, -5.4e+72], y, If[LessEqual[y, 5e-19], N[(x + x), $MachinePrecision], y]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -5.4 \cdot 10^{+72}:\\
\;\;\;\;y\\
\mathbf{elif}\;y \leq 5 \cdot 10^{-19}:\\
\;\;\;\;x + x\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if y < -5.4000000000000001e72 or 5.0000000000000004e-19 < y Initial program 100.0%
Taylor expanded in x around 0
Simplified80.1%
if -5.4000000000000001e72 < y < 5.0000000000000004e-19Initial program 99.9%
Taylor expanded in x around inf
Simplified80.3%
(FPCore (x y) :precision binary64 (+ x (+ x y)))
double code(double x, double y) {
return x + (x + y);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = x + (x + y)
end function
public static double code(double x, double y) {
return x + (x + y);
}
def code(x, y): return x + (x + y)
function code(x, y) return Float64(x + Float64(x + y)) end
function tmp = code(x, y) tmp = x + (x + y); end
code[x_, y_] := N[(x + N[(x + y), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x + \left(x + y\right)
\end{array}
Initial program 100.0%
Final simplification100.0%
(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
Simplified49.4%
(FPCore (x y) :precision binary64 x)
double code(double x, double y) {
return x;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = x
end function
public static double code(double x, double y) {
return x;
}
def code(x, y): return x
function code(x, y) return x end
function tmp = code(x, y) tmp = x; end
code[x_, y_] := x
\begin{array}{l}
\\
x
\end{array}
Initial program 100.0%
Taylor expanded in x around 0
Simplified57.2%
Taylor expanded in y around 0
Simplified11.0%
(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 2024204
(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))