
(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%
(FPCore (x y) :precision binary64 (let* ((t_0 (* x (- y)))) (if (<= x -6.5e+231) t_0 (if (<= x -4.6e-104) x (if (<= x 1.0) y t_0)))))
double code(double x, double y) {
double t_0 = x * -y;
double tmp;
if (x <= -6.5e+231) {
tmp = t_0;
} else if (x <= -4.6e-104) {
tmp = x;
} else if (x <= 1.0) {
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 = x * -y
if (x <= (-6.5d+231)) then
tmp = t_0
else if (x <= (-4.6d-104)) then
tmp = x
else if (x <= 1.0d0) then
tmp = y
else
tmp = t_0
end if
code = tmp
end function
public static double code(double x, double y) {
double t_0 = x * -y;
double tmp;
if (x <= -6.5e+231) {
tmp = t_0;
} else if (x <= -4.6e-104) {
tmp = x;
} else if (x <= 1.0) {
tmp = y;
} else {
tmp = t_0;
}
return tmp;
}
def code(x, y): t_0 = x * -y tmp = 0 if x <= -6.5e+231: tmp = t_0 elif x <= -4.6e-104: tmp = x elif x <= 1.0: tmp = y else: tmp = t_0 return tmp
function code(x, y) t_0 = Float64(x * Float64(-y)) tmp = 0.0 if (x <= -6.5e+231) tmp = t_0; elseif (x <= -4.6e-104) tmp = x; elseif (x <= 1.0) tmp = y; else tmp = t_0; end return tmp end
function tmp_2 = code(x, y) t_0 = x * -y; tmp = 0.0; if (x <= -6.5e+231) tmp = t_0; elseif (x <= -4.6e-104) tmp = x; elseif (x <= 1.0) tmp = y; else tmp = t_0; end tmp_2 = tmp; end
code[x_, y_] := Block[{t$95$0 = N[(x * (-y)), $MachinePrecision]}, If[LessEqual[x, -6.5e+231], t$95$0, If[LessEqual[x, -4.6e-104], x, If[LessEqual[x, 1.0], y, t$95$0]]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := x \cdot \left(-y\right)\\
\mathbf{if}\;x \leq -6.5 \cdot 10^{+231}:\\
\;\;\;\;t\_0\\
\mathbf{elif}\;x \leq -4.6 \cdot 10^{-104}:\\
\;\;\;\;x\\
\mathbf{elif}\;x \leq 1:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;t\_0\\
\end{array}
\end{array}
if x < -6.49999999999999933e231 or 1 < x Initial program 100.0%
Taylor expanded in y around inf 48.0%
Taylor expanded in x around inf 47.3%
mul-1-neg47.3%
distribute-rgt-neg-out47.3%
Simplified47.3%
if -6.49999999999999933e231 < x < -4.5999999999999999e-104Initial program 100.0%
Taylor expanded in y around 0 48.9%
if -4.5999999999999999e-104 < x < 1Initial program 100.0%
Taylor expanded in x around 0 77.5%
(FPCore (x y) :precision binary64 (if (or (<= x -9.2e-113) (not (<= x 0.00016))) (* x (- 1.0 y)) y))
double code(double x, double y) {
double tmp;
if ((x <= -9.2e-113) || !(x <= 0.00016)) {
tmp = x * (1.0 - y);
} 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 ((x <= (-9.2d-113)) .or. (.not. (x <= 0.00016d0))) then
tmp = x * (1.0d0 - y)
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if ((x <= -9.2e-113) || !(x <= 0.00016)) {
tmp = x * (1.0 - y);
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if (x <= -9.2e-113) or not (x <= 0.00016): tmp = x * (1.0 - y) else: tmp = y return tmp
function code(x, y) tmp = 0.0 if ((x <= -9.2e-113) || !(x <= 0.00016)) tmp = Float64(x * Float64(1.0 - y)); else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if ((x <= -9.2e-113) || ~((x <= 0.00016))) tmp = x * (1.0 - y); else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[Or[LessEqual[x, -9.2e-113], N[Not[LessEqual[x, 0.00016]], $MachinePrecision]], N[(x * N[(1.0 - y), $MachinePrecision]), $MachinePrecision], y]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -9.2 \cdot 10^{-113} \lor \neg \left(x \leq 0.00016\right):\\
\;\;\;\;x \cdot \left(1 - y\right)\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if x < -9.20000000000000032e-113 or 1.60000000000000013e-4 < x Initial program 100.0%
Taylor expanded in x around inf 88.3%
if -9.20000000000000032e-113 < x < 1.60000000000000013e-4Initial program 100.0%
Taylor expanded in x around 0 78.9%
Final simplification84.3%
(FPCore (x y) :precision binary64 (if (<= x -1.55e-112) (- x (* x y)) (* y (- 1.0 x))))
double code(double x, double y) {
double tmp;
if (x <= -1.55e-112) {
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 (x <= (-1.55d-112)) 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 (x <= -1.55e-112) {
tmp = x - (x * y);
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.55e-112: tmp = x - (x * y) else: tmp = y * (1.0 - x) return tmp
function code(x, y) tmp = 0.0 if (x <= -1.55e-112) 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 (x <= -1.55e-112) tmp = x - (x * y); else tmp = y * (1.0 - x); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.55e-112], N[(x - N[(x * y), $MachinePrecision]), $MachinePrecision], N[(y * N[(1.0 - x), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.55 \cdot 10^{-112}:\\
\;\;\;\;x - x \cdot y\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(1 - x\right)\\
\end{array}
\end{array}
if x < -1.5499999999999999e-112Initial program 100.0%
Taylor expanded in x around inf 82.4%
sub-neg82.4%
distribute-rgt-in82.4%
*-un-lft-identity82.4%
Applied egg-rr82.4%
distribute-lft-neg-out82.4%
unsub-neg82.4%
Applied egg-rr82.4%
if -1.5499999999999999e-112 < x Initial program 100.0%
Taylor expanded in y around inf 66.8%
Final simplification72.6%
(FPCore (x y) :precision binary64 (if (<= x -1.5e-112) (* x (- 1.0 y)) (* y (- 1.0 x))))
double code(double x, double y) {
double tmp;
if (x <= -1.5e-112) {
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 (x <= (-1.5d-112)) 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 (x <= -1.5e-112) {
tmp = x * (1.0 - y);
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.5e-112: tmp = x * (1.0 - y) else: tmp = y * (1.0 - x) return tmp
function code(x, y) tmp = 0.0 if (x <= -1.5e-112) 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 (x <= -1.5e-112) tmp = x * (1.0 - y); else tmp = y * (1.0 - x); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.5e-112], N[(x * N[(1.0 - y), $MachinePrecision]), $MachinePrecision], N[(y * N[(1.0 - x), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.5 \cdot 10^{-112}:\\
\;\;\;\;x \cdot \left(1 - y\right)\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(1 - x\right)\\
\end{array}
\end{array}
if x < -1.5e-112Initial program 100.0%
Taylor expanded in x around inf 82.4%
if -1.5e-112 < x Initial program 100.0%
Taylor expanded in y around inf 66.8%
(FPCore (x y) :precision binary64 (if (<= x -3.8e-104) x y))
double code(double x, double y) {
double tmp;
if (x <= -3.8e-104) {
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 (x <= (-3.8d-104)) then
tmp = x
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -3.8e-104) {
tmp = x;
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -3.8e-104: tmp = x else: tmp = y return tmp
function code(x, y) tmp = 0.0 if (x <= -3.8e-104) tmp = x; else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -3.8e-104) tmp = x; else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -3.8e-104], x, y]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -3.8 \cdot 10^{-104}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if x < -3.8000000000000001e-104Initial program 100.0%
Taylor expanded in y around 0 45.4%
if -3.8000000000000001e-104 < x Initial program 100.0%
Taylor expanded in x around 0 53.1%
(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 39.0%
herbie shell --seed 2024111
(FPCore (x y)
:name "Data.Colour.RGBSpace.HSL:hsl from colour-2.3.3, A"
:precision binary64
(- (+ x y) (* x y)))