
(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 (if (<= y -1.0) (* x (- y)) (if (<= y 4.2e-46) x (* y (- 1.0 x)))))
double code(double x, double y) {
double tmp;
if (y <= -1.0) {
tmp = x * -y;
} else if (y <= 4.2e-46) {
tmp = x;
} 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 <= (-1.0d0)) then
tmp = x * -y
else if (y <= 4.2d-46) then
tmp = x
else
tmp = y * (1.0d0 - x)
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (y <= -1.0) {
tmp = x * -y;
} else if (y <= 4.2e-46) {
tmp = x;
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
def code(x, y): tmp = 0 if y <= -1.0: tmp = x * -y elif y <= 4.2e-46: tmp = x else: tmp = y * (1.0 - x) return tmp
function code(x, y) tmp = 0.0 if (y <= -1.0) tmp = Float64(x * Float64(-y)); elseif (y <= 4.2e-46) tmp = x; else tmp = Float64(y * Float64(1.0 - x)); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (y <= -1.0) tmp = x * -y; elseif (y <= 4.2e-46) tmp = x; else tmp = y * (1.0 - x); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, -1.0], N[(x * (-y)), $MachinePrecision], If[LessEqual[y, 4.2e-46], x, N[(y * N[(1.0 - x), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -1:\\
\;\;\;\;x \cdot \left(-y\right)\\
\mathbf{elif}\;y \leq 4.2 \cdot 10^{-46}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(1 - x\right)\\
\end{array}
\end{array}
if y < -1Initial program 100.0%
Taylor expanded in y around inf 99.0%
Taylor expanded in x around inf 49.1%
associate-*r*49.1%
neg-mul-149.1%
*-commutative49.1%
Simplified49.1%
if -1 < y < 4.19999999999999975e-46Initial program 100.0%
Taylor expanded in x around inf 84.3%
Taylor expanded in y around 0 83.8%
if 4.19999999999999975e-46 < y Initial program 100.0%
Taylor expanded in y around inf 97.2%
Final simplification79.5%
(FPCore (x y) :precision binary64 (if (<= x -4.65e-61) x (if (<= x 1.0) y (* x (- y)))))
double code(double x, double y) {
double tmp;
if (x <= -4.65e-61) {
tmp = x;
} 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 <= (-4.65d-61)) then
tmp = x
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 <= -4.65e-61) {
tmp = x;
} else if (x <= 1.0) {
tmp = y;
} else {
tmp = x * -y;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -4.65e-61: tmp = x elif x <= 1.0: tmp = y else: tmp = x * -y return tmp
function code(x, y) tmp = 0.0 if (x <= -4.65e-61) tmp = x; 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 <= -4.65e-61) tmp = x; elseif (x <= 1.0) tmp = y; else tmp = x * -y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -4.65e-61], x, If[LessEqual[x, 1.0], y, N[(x * (-y)), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -4.65 \cdot 10^{-61}:\\
\;\;\;\;x\\
\mathbf{elif}\;x \leq 1:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;x \cdot \left(-y\right)\\
\end{array}
\end{array}
if x < -4.6500000000000001e-61Initial program 100.0%
Taylor expanded in x around inf 85.1%
Taylor expanded in y around 0 45.4%
if -4.6500000000000001e-61 < x < 1Initial program 100.0%
Taylor expanded in y around inf 78.2%
Taylor expanded in x around 0 78.1%
if 1 < x Initial program 100.0%
Taylor expanded in y around inf 49.4%
Taylor expanded in x around inf 49.0%
associate-*r*49.0%
neg-mul-149.0%
*-commutative49.0%
Simplified49.0%
Final simplification61.2%
(FPCore (x y) :precision binary64 (if (<= y 1.1e-45) (- x (* x y)) (* y (- 1.0 x))))
double code(double x, double y) {
double tmp;
if (y <= 1.1e-45) {
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 <= 1.1d-45) 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 <= 1.1e-45) {
tmp = x - (x * y);
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
def code(x, y): tmp = 0 if y <= 1.1e-45: tmp = x - (x * y) else: tmp = y * (1.0 - x) return tmp
function code(x, y) tmp = 0.0 if (y <= 1.1e-45) 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 <= 1.1e-45) tmp = x - (x * y); else tmp = y * (1.0 - x); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, 1.1e-45], 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 1.1 \cdot 10^{-45}:\\
\;\;\;\;x - x \cdot y\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(1 - x\right)\\
\end{array}
\end{array}
if y < 1.09999999999999997e-45Initial program 100.0%
Taylor expanded in x around inf 71.7%
if 1.09999999999999997e-45 < y Initial program 100.0%
Taylor expanded in y around inf 97.2%
(FPCore (x y) :precision binary64 (if (<= y 3.8e-46) x y))
double code(double x, double y) {
double tmp;
if (y <= 3.8e-46) {
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 <= 3.8d-46) then
tmp = x
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (y <= 3.8e-46) {
tmp = x;
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if y <= 3.8e-46: tmp = x else: tmp = y return tmp
function code(x, y) tmp = 0.0 if (y <= 3.8e-46) tmp = x; else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (y <= 3.8e-46) tmp = x; else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, 3.8e-46], x, y]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq 3.8 \cdot 10^{-46}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if y < 3.7999999999999997e-46Initial program 100.0%
Taylor expanded in x around inf 71.7%
Taylor expanded in y around 0 54.5%
if 3.7999999999999997e-46 < y Initial program 100.0%
Taylor expanded in y around inf 97.2%
Taylor expanded in x around 0 58.7%
(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 62.2%
Taylor expanded in y around 0 38.2%
(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 y around inf 64.2%
Taylor expanded in x around inf 26.8%
associate-*r*26.8%
neg-mul-126.8%
*-commutative26.8%
Simplified26.8%
add-log-exp16.2%
add-sqr-sqrt16.2%
sqrt-unprod16.2%
exp-prod16.2%
add-sqr-sqrt10.6%
sqrt-unprod10.9%
sqr-neg10.9%
sqrt-unprod1.6%
add-sqr-sqrt1.8%
pow-flip1.8%
exp-prod1.6%
rgt-mult-inverse2.5%
metadata-eval2.5%
metadata-eval2.5%
Applied egg-rr2.5%
herbie shell --seed 2024182
(FPCore (x y)
:name "Data.Colour.RGBSpace.HSL:hsl from colour-2.3.3, A"
:precision binary64
(- (+ x y) (* x y)))