
(FPCore (x y) :precision binary64 (- (+ x y) (* x y)))
double code(double x, double y) {
return (x + y) - (x * y);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (x + y) - (x * y)
end function
public static double code(double x, double y) {
return (x + y) - (x * y);
}
def code(x, y): return (x + y) - (x * y)
function code(x, y) return Float64(Float64(x + y) - Float64(x * y)) end
function tmp = code(x, y) tmp = (x + y) - (x * y); end
code[x_, y_] := N[(N[(x + y), $MachinePrecision] - N[(x * y), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\left(x + y\right) - x \cdot y
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 7 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y) :precision binary64 (- (+ x y) (* x y)))
double code(double x, double y) {
return (x + y) - (x * y);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (x + y) - (x * y)
end function
public static double code(double x, double y) {
return (x + y) - (x * y);
}
def code(x, y): return (x + y) - (x * y)
function code(x, y) return Float64(Float64(x + y) - Float64(x * y)) end
function tmp = code(x, y) tmp = (x + y) - (x * y); end
code[x_, y_] := N[(N[(x + y), $MachinePrecision] - N[(x * y), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\left(x + y\right) - x \cdot y
\end{array}
(FPCore (x y) :precision binary64 (- (+ x y) (* x y)))
double code(double x, double y) {
return (x + y) - (x * y);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (x + y) - (x * y)
end function
public static double code(double x, double y) {
return (x + y) - (x * y);
}
def code(x, y): return (x + y) - (x * y)
function code(x, y) return Float64(Float64(x + y) - Float64(x * y)) end
function tmp = code(x, y) tmp = (x + y) - (x * y); end
code[x_, y_] := N[(N[(x + y), $MachinePrecision] - N[(x * y), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\left(x + y\right) - x \cdot y
\end{array}
Initial program 100.0%
Final simplification100.0%
(FPCore (x y) :precision binary64 (let* ((t_0 (* y (- x)))) (if (<= y -1.0) t_0 (if (<= y 2e-78) x (if (<= y 6.6e+192) y t_0)))))
double code(double x, double y) {
double t_0 = y * -x;
double tmp;
if (y <= -1.0) {
tmp = t_0;
} else if (y <= 2e-78) {
tmp = x;
} else if (y <= 6.6e+192) {
tmp = y;
} else {
tmp = t_0;
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: t_0
real(8) :: tmp
t_0 = y * -x
if (y <= (-1.0d0)) then
tmp = t_0
else if (y <= 2d-78) then
tmp = x
else if (y <= 6.6d+192) then
tmp = y
else
tmp = t_0
end if
code = tmp
end function
public static double code(double x, double y) {
double t_0 = y * -x;
double tmp;
if (y <= -1.0) {
tmp = t_0;
} else if (y <= 2e-78) {
tmp = x;
} else if (y <= 6.6e+192) {
tmp = y;
} else {
tmp = t_0;
}
return tmp;
}
def code(x, y): t_0 = y * -x tmp = 0 if y <= -1.0: tmp = t_0 elif y <= 2e-78: tmp = x elif y <= 6.6e+192: tmp = y else: tmp = t_0 return tmp
function code(x, y) t_0 = Float64(y * Float64(-x)) tmp = 0.0 if (y <= -1.0) tmp = t_0; elseif (y <= 2e-78) tmp = x; elseif (y <= 6.6e+192) tmp = y; else tmp = t_0; end return tmp end
function tmp_2 = code(x, y) t_0 = y * -x; tmp = 0.0; if (y <= -1.0) tmp = t_0; elseif (y <= 2e-78) tmp = x; elseif (y <= 6.6e+192) tmp = y; else tmp = t_0; end tmp_2 = tmp; end
code[x_, y_] := Block[{t$95$0 = N[(y * (-x)), $MachinePrecision]}, If[LessEqual[y, -1.0], t$95$0, If[LessEqual[y, 2e-78], x, If[LessEqual[y, 6.6e+192], y, t$95$0]]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := y \cdot \left(-x\right)\\
\mathbf{if}\;y \leq -1:\\
\;\;\;\;t\_0\\
\mathbf{elif}\;y \leq 2 \cdot 10^{-78}:\\
\;\;\;\;x\\
\mathbf{elif}\;y \leq 6.6 \cdot 10^{+192}:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;t\_0\\
\end{array}
\end{array}
if y < -1 or 6.60000000000000019e192 < y Initial program 100.0%
Taylor expanded in x around inf 51.2%
Taylor expanded in y around inf 50.4%
mul-1-neg50.4%
distribute-lft-neg-out50.4%
*-commutative50.4%
Simplified50.4%
if -1 < y < 2e-78Initial program 100.0%
Taylor expanded in y around 0 76.2%
if 2e-78 < y < 6.60000000000000019e192Initial program 100.0%
Taylor expanded in x around 0 48.7%
Final simplification61.5%
(FPCore (x y) :precision binary64 (if (<= x -1.25e-82) (* x (- 1.0 y)) (if (<= x 1.0) y (* y (- x)))))
double code(double x, double y) {
double tmp;
if (x <= -1.25e-82) {
tmp = x * (1.0 - y);
} else if (x <= 1.0) {
tmp = y;
} else {
tmp = y * -x;
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (x <= (-1.25d-82)) then
tmp = x * (1.0d0 - y)
else if (x <= 1.0d0) then
tmp = y
else
tmp = y * -x
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -1.25e-82) {
tmp = x * (1.0 - y);
} else if (x <= 1.0) {
tmp = y;
} else {
tmp = y * -x;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.25e-82: tmp = x * (1.0 - y) elif x <= 1.0: tmp = y else: tmp = y * -x return tmp
function code(x, y) tmp = 0.0 if (x <= -1.25e-82) tmp = Float64(x * Float64(1.0 - y)); elseif (x <= 1.0) tmp = y; else tmp = Float64(y * Float64(-x)); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -1.25e-82) tmp = x * (1.0 - y); elseif (x <= 1.0) tmp = y; else tmp = y * -x; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.25e-82], N[(x * N[(1.0 - y), $MachinePrecision]), $MachinePrecision], If[LessEqual[x, 1.0], y, N[(y * (-x)), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.25 \cdot 10^{-82}:\\
\;\;\;\;x \cdot \left(1 - y\right)\\
\mathbf{elif}\;x \leq 1:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(-x\right)\\
\end{array}
\end{array}
if x < -1.25e-82Initial program 100.0%
Taylor expanded in x around inf 94.5%
if -1.25e-82 < x < 1Initial program 100.0%
Taylor expanded in x around 0 75.8%
if 1 < x Initial program 100.0%
Taylor expanded in x around inf 100.0%
Taylor expanded in y around inf 53.2%
mul-1-neg53.2%
distribute-lft-neg-out53.2%
*-commutative53.2%
Simplified53.2%
Final simplification75.0%
(FPCore (x y) :precision binary64 (if (<= y 1.85e-78) (* x (- 1.0 y)) (* y (- 1.0 x))))
double code(double x, double y) {
double tmp;
if (y <= 1.85e-78) {
tmp = x * (1.0 - y);
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (y <= 1.85d-78) then
tmp = x * (1.0d0 - y)
else
tmp = y * (1.0d0 - x)
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (y <= 1.85e-78) {
tmp = x * (1.0 - y);
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
def code(x, y): tmp = 0 if y <= 1.85e-78: tmp = x * (1.0 - y) else: tmp = y * (1.0 - x) return tmp
function code(x, y) tmp = 0.0 if (y <= 1.85e-78) tmp = Float64(x * Float64(1.0 - y)); else tmp = Float64(y * Float64(1.0 - x)); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (y <= 1.85e-78) tmp = x * (1.0 - y); else tmp = y * (1.0 - x); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, 1.85e-78], N[(x * N[(1.0 - y), $MachinePrecision]), $MachinePrecision], N[(y * N[(1.0 - x), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq 1.85 \cdot 10^{-78}:\\
\;\;\;\;x \cdot \left(1 - y\right)\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(1 - x\right)\\
\end{array}
\end{array}
if y < 1.85000000000000003e-78Initial program 100.0%
Taylor expanded in x around inf 66.4%
if 1.85000000000000003e-78 < y Initial program 100.0%
Taylor expanded in y around inf 88.7%
Final simplification73.3%
(FPCore (x y) :precision binary64 (if (<= y 9.2e-80) (- x (* x y)) (* y (- 1.0 x))))
double code(double x, double y) {
double tmp;
if (y <= 9.2e-80) {
tmp = x - (x * y);
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (y <= 9.2d-80) then
tmp = x - (x * y)
else
tmp = y * (1.0d0 - x)
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (y <= 9.2e-80) {
tmp = x - (x * y);
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
def code(x, y): tmp = 0 if y <= 9.2e-80: tmp = x - (x * y) else: tmp = y * (1.0 - x) return tmp
function code(x, y) tmp = 0.0 if (y <= 9.2e-80) tmp = Float64(x - Float64(x * y)); else tmp = Float64(y * Float64(1.0 - x)); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (y <= 9.2e-80) tmp = x - (x * y); else tmp = y * (1.0 - x); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, 9.2e-80], N[(x - N[(x * y), $MachinePrecision]), $MachinePrecision], N[(y * N[(1.0 - x), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq 9.2 \cdot 10^{-80}:\\
\;\;\;\;x - x \cdot y\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(1 - x\right)\\
\end{array}
\end{array}
if y < 9.1999999999999993e-80Initial program 100.0%
Taylor expanded in x around inf 66.4%
sub-neg66.4%
distribute-rgt-in66.4%
*-un-lft-identity66.4%
Applied egg-rr66.4%
if 9.1999999999999993e-80 < y Initial program 100.0%
Taylor expanded in y around inf 88.7%
Final simplification73.3%
(FPCore (x y) :precision binary64 (if (<= y 5e-81) x y))
double code(double x, double y) {
double tmp;
if (y <= 5e-81) {
tmp = 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 <= 5d-81) then
tmp = x
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (y <= 5e-81) {
tmp = x;
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if y <= 5e-81: tmp = x else: tmp = y return tmp
function code(x, y) tmp = 0.0 if (y <= 5e-81) tmp = x; else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (y <= 5e-81) tmp = x; else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, 5e-81], x, y]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq 5 \cdot 10^{-81}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if y < 4.99999999999999981e-81Initial program 100.0%
Taylor expanded in y around 0 50.7%
if 4.99999999999999981e-81 < y Initial program 100.0%
Taylor expanded in x around 0 45.9%
Final simplification49.2%
(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 y around 0 38.3%
Final simplification38.3%
herbie shell --seed 2024080
(FPCore (x y)
:name "Data.Colour.RGBSpace.HSL:hsl from colour-2.3.3, A"
:precision binary64
(- (+ x y) (* x y)))