
(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 2.7e-90) x (if (<= y 9.2e+203) 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 <= 2.7e-90) {
tmp = x;
} else if (y <= 9.2e+203) {
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 <= 2.7d-90) then
tmp = x
else if (y <= 9.2d+203) 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 <= 2.7e-90) {
tmp = x;
} else if (y <= 9.2e+203) {
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 <= 2.7e-90: tmp = x elif y <= 9.2e+203: 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 <= 2.7e-90) tmp = x; elseif (y <= 9.2e+203) 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 <= 2.7e-90) tmp = x; elseif (y <= 9.2e+203) 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, 2.7e-90], x, If[LessEqual[y, 9.2e+203], 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 2.7 \cdot 10^{-90}:\\
\;\;\;\;x\\
\mathbf{elif}\;y \leq 9.2 \cdot 10^{+203}:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;t\_0\\
\end{array}
\end{array}
if y < -1 or 9.1999999999999996e203 < y Initial program 100.0%
Taylor expanded in y around inf 100.0%
Taylor expanded in x around inf 56.2%
associate-*r*56.2%
neg-mul-156.2%
*-commutative56.2%
Simplified56.2%
if -1 < y < 2.69999999999999996e-90Initial program 100.0%
Taylor expanded in x around inf 80.2%
Taylor expanded in y around 0 79.5%
if 2.69999999999999996e-90 < y < 9.1999999999999996e203Initial program 100.0%
Taylor expanded in y around inf 81.5%
Taylor expanded in x around 0 59.8%
Final simplification66.4%
(FPCore (x y) :precision binary64 (if (<= y -1.0) (* x (- y)) (if (<= y 3.6e-90) 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-90) {
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-90) 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-90) {
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-90: 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-90) 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-90) 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-90], 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^{-90}:\\
\;\;\;\;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 100.0%
Taylor expanded in x around inf 53.0%
associate-*r*53.0%
neg-mul-153.0%
*-commutative53.0%
Simplified53.0%
if -1 < y < 3.59999999999999981e-90Initial program 100.0%
Taylor expanded in x around inf 80.2%
Taylor expanded in y around 0 79.5%
if 3.59999999999999981e-90 < y Initial program 100.0%
Taylor expanded in y around inf 88.3%
Final simplification76.7%
(FPCore (x y) :precision binary64 (if (<= y 9.2e-91) (- x (* x y)) (* y (- 1.0 x))))
double code(double x, double y) {
double tmp;
if (y <= 9.2e-91) {
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 <= 9.2d-91) 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 <= 9.2e-91) {
tmp = x - (x * y);
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
def code(x, y): tmp = 0 if y <= 9.2e-91: tmp = x - (x * y) else: tmp = y * (1.0 - x) return tmp
function code(x, y) tmp = 0.0 if (y <= 9.2e-91) 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 <= 9.2e-91) tmp = x - (x * y); else tmp = y * (1.0 - x); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, 9.2e-91], 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 9.2 \cdot 10^{-91}:\\
\;\;\;\;x - x \cdot y\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(1 - x\right)\\
\end{array}
\end{array}
if y < 9.19999999999999982e-91Initial program 100.0%
Taylor expanded in x around inf 70.4%
if 9.19999999999999982e-91 < y Initial program 100.0%
Taylor expanded in y around inf 88.3%
(FPCore (x y) :precision binary64 (if (<= y 4.5e-92) x y))
double code(double x, double y) {
double tmp;
if (y <= 4.5e-92) {
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 <= 4.5d-92) then
tmp = x
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (y <= 4.5e-92) {
tmp = x;
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if y <= 4.5e-92: tmp = x else: tmp = y return tmp
function code(x, y) tmp = 0.0 if (y <= 4.5e-92) tmp = x; else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (y <= 4.5e-92) tmp = x; else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, 4.5e-92], x, y]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq 4.5 \cdot 10^{-92}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if y < 4.5e-92Initial program 100.0%
Taylor expanded in x around inf 70.4%
Taylor expanded in y around 0 52.5%
if 4.5e-92 < y Initial program 100.0%
Taylor expanded in y around inf 88.3%
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 x around inf 62.8%
Taylor expanded in y around 0 37.6%
(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 63.7%
Taylor expanded in x around inf 27.7%
associate-*r*27.7%
neg-mul-127.7%
*-commutative27.7%
Simplified27.7%
add-log-exp18.1%
add-sqr-sqrt18.1%
sqrt-unprod18.1%
exp-prod18.1%
add-sqr-sqrt9.8%
sqrt-unprod10.2%
sqr-neg10.2%
sqrt-unprod1.7%
add-sqr-sqrt1.9%
pow-flip1.9%
exp-prod1.7%
rgt-mult-inverse2.7%
metadata-eval2.7%
metadata-eval2.7%
Applied egg-rr2.7%
herbie shell --seed 2024172
(FPCore (x y)
:name "Data.Colour.RGBSpace.HSL:hsl from colour-2.3.3, A"
:precision binary64
(- (+ x y) (* x y)))