
(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 99.9%
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 (<= x -0.26) (+ x x) (if (<= x 4.2e+63) (+ x y) (+ x x))))
double code(double x, double y) {
double tmp;
if (x <= -0.26) {
tmp = x + x;
} else if (x <= 4.2e+63) {
tmp = x + 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 <= (-0.26d0)) then
tmp = x + x
else if (x <= 4.2d+63) then
tmp = x + y
else
tmp = x + x
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -0.26) {
tmp = x + x;
} else if (x <= 4.2e+63) {
tmp = x + y;
} else {
tmp = x + x;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -0.26: tmp = x + x elif x <= 4.2e+63: tmp = x + y else: tmp = x + x return tmp
function code(x, y) tmp = 0.0 if (x <= -0.26) tmp = Float64(x + x); elseif (x <= 4.2e+63) tmp = Float64(x + y); else tmp = Float64(x + x); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -0.26) tmp = x + x; elseif (x <= 4.2e+63) tmp = x + y; else tmp = x + x; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -0.26], N[(x + x), $MachinePrecision], If[LessEqual[x, 4.2e+63], N[(x + y), $MachinePrecision], N[(x + x), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -0.26:\\
\;\;\;\;x + x\\
\mathbf{elif}\;x \leq 4.2 \cdot 10^{+63}:\\
\;\;\;\;x + y\\
\mathbf{else}:\\
\;\;\;\;x + x\\
\end{array}
\end{array}
if x < -0.26000000000000001 or 4.2000000000000004e63 < x Initial program 99.9%
Taylor expanded in x around inf
Simplified84.7%
if -0.26000000000000001 < x < 4.2000000000000004e63Initial program 100.0%
Taylor expanded in x around 0
Simplified77.7%
Final simplification80.4%
(FPCore (x y) :precision binary64 (if (<= x -1.45) (+ x x) (if (<= x 2.35e+64) y (+ x x))))
double code(double x, double y) {
double tmp;
if (x <= -1.45) {
tmp = x + x;
} else if (x <= 2.35e+64) {
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 <= (-1.45d0)) then
tmp = x + x
else if (x <= 2.35d+64) 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 <= -1.45) {
tmp = x + x;
} else if (x <= 2.35e+64) {
tmp = y;
} else {
tmp = x + x;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.45: tmp = x + x elif x <= 2.35e+64: tmp = y else: tmp = x + x return tmp
function code(x, y) tmp = 0.0 if (x <= -1.45) tmp = Float64(x + x); elseif (x <= 2.35e+64) tmp = y; else tmp = Float64(x + x); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -1.45) tmp = x + x; elseif (x <= 2.35e+64) tmp = y; else tmp = x + x; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.45], N[(x + x), $MachinePrecision], If[LessEqual[x, 2.35e+64], y, N[(x + x), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.45:\\
\;\;\;\;x + x\\
\mathbf{elif}\;x \leq 2.35 \cdot 10^{+64}:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;x + x\\
\end{array}
\end{array}
if x < -1.44999999999999996 or 2.35000000000000015e64 < x Initial program 99.9%
Taylor expanded in x around inf
Simplified84.7%
if -1.44999999999999996 < x < 2.35000000000000015e64Initial program 100.0%
Taylor expanded in x around 0
Simplified74.4%
(FPCore (x y) :precision binary64 (if (<= x 1.38e+107) y x))
double code(double x, double y) {
double tmp;
if (x <= 1.38e+107) {
tmp = y;
} else {
tmp = x;
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (x <= 1.38d+107) then
tmp = y
else
tmp = x
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= 1.38e+107) {
tmp = y;
} else {
tmp = x;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= 1.38e+107: tmp = y else: tmp = x return tmp
function code(x, y) tmp = 0.0 if (x <= 1.38e+107) tmp = y; else tmp = x; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= 1.38e+107) tmp = y; else tmp = x; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, 1.38e+107], y, x]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq 1.38 \cdot 10^{+107}:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;x\\
\end{array}
\end{array}
if x < 1.38e107Initial program 99.9%
Taylor expanded in x around 0
Simplified59.4%
if 1.38e107 < x Initial program 99.9%
Taylor expanded in x around 0
Simplified18.8%
Taylor expanded in y around 0
Simplified18.7%
(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 99.9%
Final simplification99.9%
(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 99.9%
Taylor expanded in x around 0
Simplified58.4%
Taylor expanded in y around 0
Simplified11.1%
(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 2024196
(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))