
(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 (<= y -1.0) t_0 (if (<= y 2.05e-94) x (if (<= y 4.8e+217) y t_0)))))
double code(double x, double y) {
double t_0 = x * -y;
double tmp;
if (y <= -1.0) {
tmp = t_0;
} else if (y <= 2.05e-94) {
tmp = x;
} else if (y <= 4.8e+217) {
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 (y <= (-1.0d0)) then
tmp = t_0
else if (y <= 2.05d-94) then
tmp = x
else if (y <= 4.8d+217) 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 (y <= -1.0) {
tmp = t_0;
} else if (y <= 2.05e-94) {
tmp = x;
} else if (y <= 4.8e+217) {
tmp = y;
} else {
tmp = t_0;
}
return tmp;
}
def code(x, y): t_0 = x * -y tmp = 0 if y <= -1.0: tmp = t_0 elif y <= 2.05e-94: tmp = x elif y <= 4.8e+217: tmp = y else: tmp = t_0 return tmp
function code(x, y) t_0 = Float64(x * Float64(-y)) tmp = 0.0 if (y <= -1.0) tmp = t_0; elseif (y <= 2.05e-94) tmp = x; elseif (y <= 4.8e+217) tmp = y; else tmp = t_0; end return tmp end
function tmp_2 = code(x, y) t_0 = x * -y; tmp = 0.0; if (y <= -1.0) tmp = t_0; elseif (y <= 2.05e-94) tmp = x; elseif (y <= 4.8e+217) tmp = y; else tmp = t_0; end tmp_2 = tmp; end
code[x_, y_] := Block[{t$95$0 = N[(x * (-y)), $MachinePrecision]}, If[LessEqual[y, -1.0], t$95$0, If[LessEqual[y, 2.05e-94], x, If[LessEqual[y, 4.8e+217], y, t$95$0]]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := x \cdot \left(-y\right)\\
\mathbf{if}\;y \leq -1:\\
\;\;\;\;t\_0\\
\mathbf{elif}\;y \leq 2.05 \cdot 10^{-94}:\\
\;\;\;\;x\\
\mathbf{elif}\;y \leq 4.8 \cdot 10^{+217}:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;t\_0\\
\end{array}
\end{array}
if y < -1 or 4.7999999999999996e217 < y Initial program 100.0%
Taylor expanded in x around inf 50.8%
Taylor expanded in y around inf 50.7%
mul-1-neg50.7%
distribute-rgt-neg-out50.7%
Simplified50.7%
if -1 < y < 2.05e-94Initial program 100.0%
Taylor expanded in x around inf 82.6%
Taylor expanded in y around 0 82.6%
if 2.05e-94 < y < 4.7999999999999996e217Initial program 100.0%
Taylor expanded in x around 0 90.0%
Taylor expanded in x around 0 54.9%
(FPCore (x y) :precision binary64 (if (<= x -1.35e-124) (- x (* x y)) (if (<= x 1.0) y (* x (- y)))))
double code(double x, double y) {
double tmp;
if (x <= -1.35e-124) {
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 <= (-1.35d-124)) 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 <= -1.35e-124) {
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 <= -1.35e-124: 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 <= -1.35e-124) 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 <= -1.35e-124) 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, -1.35e-124], 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 -1.35 \cdot 10^{-124}:\\
\;\;\;\;x - x \cdot y\\
\mathbf{elif}\;x \leq 1:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;x \cdot \left(-y\right)\\
\end{array}
\end{array}
if x < -1.35000000000000009e-124Initial program 100.0%
Taylor expanded in x around inf 80.0%
if -1.35000000000000009e-124 < x < 1Initial program 100.0%
Taylor expanded in x around 0 80.3%
Taylor expanded in x around 0 79.7%
if 1 < x Initial program 100.0%
Taylor expanded in x around inf 98.8%
Taylor expanded in y around inf 60.2%
mul-1-neg60.2%
distribute-rgt-neg-out60.2%
Simplified60.2%
(FPCore (x y) :precision binary64 (if (<= x -1.35e-124) (- x (* x y)) (- y (* x y))))
double code(double x, double y) {
double tmp;
if (x <= -1.35e-124) {
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-124)) 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-124) {
tmp = x - (x * y);
} else {
tmp = y - (x * y);
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.35e-124: tmp = x - (x * y) else: tmp = y - (x * y) return tmp
function code(x, y) tmp = 0.0 if (x <= -1.35e-124) 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-124) tmp = x - (x * y); else tmp = y - (x * y); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.35e-124], 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^{-124}:\\
\;\;\;\;x - x \cdot y\\
\mathbf{else}:\\
\;\;\;\;y - x \cdot y\\
\end{array}
\end{array}
if x < -1.35000000000000009e-124Initial program 100.0%
Taylor expanded in x around inf 80.0%
if -1.35000000000000009e-124 < x Initial program 100.0%
Taylor expanded in x around 0 72.8%
(FPCore (x y) :precision binary64 (if (<= y 2e-94) x y))
double code(double x, double y) {
double tmp;
if (y <= 2e-94) {
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 <= 2d-94) then
tmp = x
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (y <= 2e-94) {
tmp = x;
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if y <= 2e-94: tmp = x else: tmp = y return tmp
function code(x, y) tmp = 0.0 if (y <= 2e-94) tmp = x; else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (y <= 2e-94) tmp = x; else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, 2e-94], x, y]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq 2 \cdot 10^{-94}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if y < 1.9999999999999999e-94Initial program 100.0%
Taylor expanded in x around inf 68.6%
Taylor expanded in y around 0 50.6%
if 1.9999999999999999e-94 < y Initial program 100.0%
Taylor expanded in x around 0 91.8%
Taylor expanded in x around 0 52.1%
(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 x around inf 62.2%
Taylor expanded in y around 0 36.2%
(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 62.2%
Taylor expanded in y around inf 28.8%
mul-1-neg28.8%
distribute-rgt-neg-out28.8%
Simplified28.8%
add-log-exp18.8%
add-sqr-sqrt18.8%
sqrt-unprod18.8%
exp-prod18.7%
add-sqr-sqrt10.1%
sqrt-unprod10.3%
sqr-neg10.3%
sqrt-unprod1.8%
add-sqr-sqrt2.2%
pow-flip2.2%
exp-prod1.6%
rgt-mult-inverse2.5%
metadata-eval2.5%
metadata-eval2.5%
Applied egg-rr2.5%
herbie shell --seed 2024144
(FPCore (x y)
:name "Data.Colour.RGBSpace.HSL:hsl from colour-2.3.3, A"
:precision binary64
(- (+ x y) (* x y)))