
(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 8 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 3.6e-78) x (* y (- 1.0 x)))))
double code(double x, double y) {
double tmp;
if (y <= -1.0) {
tmp = x * -y;
} else if (y <= 3.6e-78) {
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 <= 3.6d-78) 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 <= 3.6e-78) {
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 <= 3.6e-78: 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 <= 3.6e-78) 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 <= 3.6e-78) 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, 3.6e-78], 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 3.6 \cdot 10^{-78}:\\
\;\;\;\;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 99.9%
Taylor expanded in x around inf 39.1%
associate-*r*39.1%
neg-mul-139.1%
*-commutative39.1%
Simplified39.1%
if -1 < y < 3.6000000000000002e-78Initial program 100.0%
Taylor expanded in x around inf 75.3%
Taylor expanded in y around 0 74.5%
if 3.6000000000000002e-78 < y Initial program 100.0%
Taylor expanded in y around inf 87.2%
Final simplification71.4%
(FPCore (x y) :precision binary64 (if (<= x -1.45e-145) x (if (<= x 1.0) y (* x (- y)))))
double code(double x, double y) {
double tmp;
if (x <= -1.45e-145) {
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 <= (-1.45d-145)) 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 <= -1.45e-145) {
tmp = x;
} else if (x <= 1.0) {
tmp = y;
} else {
tmp = x * -y;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.45e-145: tmp = x elif x <= 1.0: tmp = y else: tmp = x * -y return tmp
function code(x, y) tmp = 0.0 if (x <= -1.45e-145) 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 <= -1.45e-145) tmp = x; elseif (x <= 1.0) tmp = y; else tmp = x * -y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.45e-145], x, If[LessEqual[x, 1.0], y, N[(x * (-y)), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.45 \cdot 10^{-145}:\\
\;\;\;\;x\\
\mathbf{elif}\;x \leq 1:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;x \cdot \left(-y\right)\\
\end{array}
\end{array}
if x < -1.44999999999999992e-145Initial program 100.0%
Taylor expanded in x around inf 82.0%
Taylor expanded in y around 0 55.5%
if -1.44999999999999992e-145 < x < 1Initial program 100.0%
Taylor expanded in y around inf 83.9%
Taylor expanded in x around 0 83.9%
if 1 < x Initial program 100.0%
Taylor expanded in y around inf 45.1%
Taylor expanded in x around inf 45.1%
associate-*r*45.1%
neg-mul-145.1%
*-commutative45.1%
Simplified45.1%
Final simplification64.9%
(FPCore (x y) :precision binary64 (if (<= y 3.2e-78) (- x (* x y)) (- y (* x y))))
double code(double x, double y) {
double tmp;
if (y <= 3.2e-78) {
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 (y <= 3.2d-78) 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 (y <= 3.2e-78) {
tmp = x - (x * y);
} else {
tmp = y - (x * y);
}
return tmp;
}
def code(x, y): tmp = 0 if y <= 3.2e-78: tmp = x - (x * y) else: tmp = y - (x * y) return tmp
function code(x, y) tmp = 0.0 if (y <= 3.2e-78) 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 (y <= 3.2e-78) tmp = x - (x * y); else tmp = y - (x * y); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, 3.2e-78], N[(x - N[(x * y), $MachinePrecision]), $MachinePrecision], N[(y - N[(x * y), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq 3.2 \cdot 10^{-78}:\\
\;\;\;\;x - x \cdot y\\
\mathbf{else}:\\
\;\;\;\;y - x \cdot y\\
\end{array}
\end{array}
if y < 3.2e-78Initial program 100.0%
Taylor expanded in x around inf 64.8%
if 3.2e-78 < y Initial program 100.0%
Taylor expanded in x around 0 87.2%
(FPCore (x y) :precision binary64 (if (<= y 3.6e-78) (- x (* x y)) (* y (- 1.0 x))))
double code(double x, double y) {
double tmp;
if (y <= 3.6e-78) {
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 <= 3.6d-78) 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 <= 3.6e-78) {
tmp = x - (x * y);
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
def code(x, y): tmp = 0 if y <= 3.6e-78: tmp = x - (x * y) else: tmp = y * (1.0 - x) return tmp
function code(x, y) tmp = 0.0 if (y <= 3.6e-78) 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 <= 3.6e-78) tmp = x - (x * y); else tmp = y * (1.0 - x); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, 3.6e-78], 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 3.6 \cdot 10^{-78}:\\
\;\;\;\;x - x \cdot y\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(1 - x\right)\\
\end{array}
\end{array}
if y < 3.6000000000000002e-78Initial program 100.0%
Taylor expanded in x around inf 64.8%
if 3.6000000000000002e-78 < y Initial program 100.0%
Taylor expanded in y around inf 87.2%
(FPCore (x y) :precision binary64 (if (<= y 2.1e-78) x y))
double code(double x, double y) {
double tmp;
if (y <= 2.1e-78) {
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 <= 2.1d-78) then
tmp = x
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (y <= 2.1e-78) {
tmp = x;
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if y <= 2.1e-78: tmp = x else: tmp = y return tmp
function code(x, y) tmp = 0.0 if (y <= 2.1e-78) tmp = x; else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (y <= 2.1e-78) tmp = x; else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, 2.1e-78], x, y]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq 2.1 \cdot 10^{-78}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if y < 2.1000000000000001e-78Initial program 100.0%
Taylor expanded in x around inf 64.8%
Taylor expanded in y around 0 53.9%
if 2.1000000000000001e-78 < y Initial program 100.0%
Taylor expanded in y around inf 87.2%
Taylor expanded in x around 0 52.8%
(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 59.8%
Taylor expanded in y around 0 40.1%
(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 60.8%
Taylor expanded in x around inf 21.3%
associate-*r*21.3%
neg-mul-121.3%
*-commutative21.3%
Simplified21.3%
add-log-exp11.6%
add-sqr-sqrt11.6%
sqrt-unprod11.6%
exp-prod11.6%
add-sqr-sqrt5.9%
sqrt-unprod6.2%
sqr-neg6.2%
sqrt-unprod1.8%
add-sqr-sqrt2.1%
pow-flip2.1%
exp-prod1.8%
rgt-mult-inverse2.7%
metadata-eval2.7%
metadata-eval2.7%
Applied egg-rr2.7%
herbie shell --seed 2024160
(FPCore (x y)
:name "Data.Colour.RGBSpace.HSL:hsl from colour-2.3.3, A"
:precision binary64
(- (+ x y) (* x y)))