
(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 -7e+197) t_0 (if (<= x -3e-53) x (if (<= x 1.0) y t_0)))))
double code(double x, double y) {
double t_0 = x * -y;
double tmp;
if (x <= -7e+197) {
tmp = t_0;
} else if (x <= -3e-53) {
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 <= (-7d+197)) then
tmp = t_0
else if (x <= (-3d-53)) 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 <= -7e+197) {
tmp = t_0;
} else if (x <= -3e-53) {
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 <= -7e+197: tmp = t_0 elif x <= -3e-53: 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 <= -7e+197) tmp = t_0; elseif (x <= -3e-53) 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 <= -7e+197) tmp = t_0; elseif (x <= -3e-53) 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, -7e+197], t$95$0, If[LessEqual[x, -3e-53], 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 -7 \cdot 10^{+197}:\\
\;\;\;\;t\_0\\
\mathbf{elif}\;x \leq -3 \cdot 10^{-53}:\\
\;\;\;\;x\\
\mathbf{elif}\;x \leq 1:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;t\_0\\
\end{array}
\end{array}
if x < -6.99999999999999999e197 or 1 < x Initial program 100.0%
Taylor expanded in x around inf 98.5%
Taylor expanded in y around inf 54.6%
mul-1-neg54.6%
distribute-rgt-neg-out54.6%
Simplified54.6%
if -6.99999999999999999e197 < x < -3.0000000000000002e-53Initial program 100.0%
Taylor expanded in x around inf 92.1%
Taylor expanded in y around 0 49.3%
if -3.0000000000000002e-53 < x < 1Initial program 100.0%
Taylor expanded in x around 0 74.8%
Taylor expanded in x around 0 74.8%
(FPCore (x y) :precision binary64 (if (<= x -1.25e-65) (- x (* x y)) (if (<= x 1.0) y (* x (- y)))))
double code(double x, double y) {
double tmp;
if (x <= -1.25e-65) {
tmp = x - (x * y);
} else if (x <= 1.0) {
tmp = y;
} 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 (x <= (-1.25d-65)) then
tmp = x - (x * y)
else if (x <= 1.0d0) then
tmp = y
else
tmp = x * -y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -1.25e-65) {
tmp = x - (x * y);
} else if (x <= 1.0) {
tmp = y;
} else {
tmp = x * -y;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.25e-65: tmp = x - (x * y) elif x <= 1.0: tmp = y else: tmp = x * -y return tmp
function code(x, y) tmp = 0.0 if (x <= -1.25e-65) tmp = Float64(x - Float64(x * y)); elseif (x <= 1.0) tmp = y; else tmp = Float64(x * Float64(-y)); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -1.25e-65) tmp = x - (x * y); elseif (x <= 1.0) tmp = y; else tmp = x * -y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.25e-65], N[(x - N[(x * y), $MachinePrecision]), $MachinePrecision], If[LessEqual[x, 1.0], y, N[(x * (-y)), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.25 \cdot 10^{-65}:\\
\;\;\;\;x - x \cdot y\\
\mathbf{elif}\;x \leq 1:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;x \cdot \left(-y\right)\\
\end{array}
\end{array}
if x < -1.24999999999999996e-65Initial program 100.0%
Taylor expanded in x around inf 93.9%
if -1.24999999999999996e-65 < x < 1Initial program 100.0%
Taylor expanded in x around 0 75.8%
Taylor expanded in x around 0 75.8%
if 1 < x Initial program 100.0%
Taylor expanded in x around inf 98.0%
Taylor expanded in y around inf 50.7%
mul-1-neg50.7%
distribute-rgt-neg-out50.7%
Simplified50.7%
(FPCore (x y) :precision binary64 (if (<= x -1.35e-65) (- x (* x y)) (- y (* x y))))
double code(double x, double y) {
double tmp;
if (x <= -1.35e-65) {
tmp = x - (x * y);
} else {
tmp = y - (x * y);
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (x <= (-1.35d-65)) then
tmp = x - (x * y)
else
tmp = y - (x * y)
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -1.35e-65) {
tmp = x - (x * y);
} else {
tmp = y - (x * y);
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.35e-65: tmp = x - (x * y) else: tmp = y - (x * y) return tmp
function code(x, y) tmp = 0.0 if (x <= -1.35e-65) tmp = Float64(x - Float64(x * y)); else tmp = Float64(y - Float64(x * y)); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -1.35e-65) tmp = x - (x * y); else tmp = y - (x * y); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.35e-65], N[(x - N[(x * y), $MachinePrecision]), $MachinePrecision], N[(y - N[(x * y), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.35 \cdot 10^{-65}:\\
\;\;\;\;x - x \cdot y\\
\mathbf{else}:\\
\;\;\;\;y - x \cdot y\\
\end{array}
\end{array}
if x < -1.3499999999999999e-65Initial program 100.0%
Taylor expanded in x around inf 93.9%
if -1.3499999999999999e-65 < x Initial program 100.0%
Taylor expanded in x around 0 67.4%
(FPCore (x y) :precision binary64 (if (<= x -2.9e-54) x y))
double code(double x, double y) {
double tmp;
if (x <= -2.9e-54) {
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 <= (-2.9d-54)) then
tmp = x
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -2.9e-54) {
tmp = x;
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -2.9e-54: tmp = x else: tmp = y return tmp
function code(x, y) tmp = 0.0 if (x <= -2.9e-54) tmp = x; else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -2.9e-54) tmp = x; else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -2.9e-54], x, y]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -2.9 \cdot 10^{-54}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if x < -2.90000000000000015e-54Initial program 100.0%
Taylor expanded in x around inf 94.9%
Taylor expanded in y around 0 45.1%
if -2.90000000000000015e-54 < x Initial program 100.0%
Taylor expanded in x around 0 66.9%
Taylor expanded in x around 0 48.7%
(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 inf 63.3%
Taylor expanded in y around 0 36.8%
(FPCore (x y) :precision binary64 0.0)
double code(double x, double y) {
return 0.0;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = 0.0d0
end function
public static double code(double x, double y) {
return 0.0;
}
def code(x, y): return 0.0
function code(x, y) return 0.0 end
function tmp = code(x, y) tmp = 0.0; end
code[x_, y_] := 0.0
\begin{array}{l}
\\
0
\end{array}
Initial program 100.0%
Taylor expanded in x around inf 63.3%
Taylor expanded in y around inf 29.3%
mul-1-neg29.3%
distribute-rgt-neg-out29.3%
Simplified29.3%
add-log-exp16.4%
add-sqr-sqrt16.4%
sqrt-unprod16.4%
exp-prod16.3%
add-sqr-sqrt11.4%
sqrt-unprod11.8%
sqr-neg11.8%
sqrt-unprod1.8%
add-sqr-sqrt2.2%
pow-flip2.2%
exp-prod1.9%
rgt-mult-inverse2.8%
metadata-eval2.8%
metadata-eval2.8%
Applied egg-rr2.8%
herbie shell --seed 2024143
(FPCore (x y)
:name "Data.Colour.RGBSpace.HSL:hsl from colour-2.3.3, A"
:precision binary64
(- (+ x y) (* x y)))