
(FPCore (x y) :precision binary64 (/ (- x y) (- 2.0 (+ x y))))
double code(double x, double y) {
return (x - y) / (2.0 - (x + y));
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (x - y) / (2.0d0 - (x + y))
end function
public static double code(double x, double y) {
return (x - y) / (2.0 - (x + y));
}
def code(x, y): return (x - y) / (2.0 - (x + y))
function code(x, y) return Float64(Float64(x - y) / Float64(2.0 - Float64(x + y))) end
function tmp = code(x, y) tmp = (x - y) / (2.0 - (x + y)); end
code[x_, y_] := N[(N[(x - y), $MachinePrecision] / N[(2.0 - N[(x + y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{x - y}{2 - \left(x + y\right)}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 6 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y) :precision binary64 (/ (- x y) (- 2.0 (+ x y))))
double code(double x, double y) {
return (x - y) / (2.0 - (x + y));
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (x - y) / (2.0d0 - (x + y))
end function
public static double code(double x, double y) {
return (x - y) / (2.0 - (x + y));
}
def code(x, y): return (x - y) / (2.0 - (x + y))
function code(x, y) return Float64(Float64(x - y) / Float64(2.0 - Float64(x + y))) end
function tmp = code(x, y) tmp = (x - y) / (2.0 - (x + y)); end
code[x_, y_] := N[(N[(x - y), $MachinePrecision] / N[(2.0 - N[(x + y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{x - y}{2 - \left(x + y\right)}
\end{array}
(FPCore (x y) :precision binary64 (/ (- x y) (- 2.0 (+ x y))))
double code(double x, double y) {
return (x - y) / (2.0 - (x + y));
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = (x - y) / (2.0d0 - (x + y))
end function
public static double code(double x, double y) {
return (x - y) / (2.0 - (x + y));
}
def code(x, y): return (x - y) / (2.0 - (x + y))
function code(x, y) return Float64(Float64(x - y) / Float64(2.0 - Float64(x + y))) end
function tmp = code(x, y) tmp = (x - y) / (2.0 - (x + y)); end
code[x_, y_] := N[(N[(x - y), $MachinePrecision] / N[(2.0 - N[(x + y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{x - y}{2 - \left(x + y\right)}
\end{array}
Initial program 100.0%
Final simplification100.0%
(FPCore (x y) :precision binary64 (if (<= x -2.2e+58) -1.0 (if (<= x 2.5e-159) (/ (- y) (- 2.0 y)) (/ x (- 2.0 x)))))
double code(double x, double y) {
double tmp;
if (x <= -2.2e+58) {
tmp = -1.0;
} else if (x <= 2.5e-159) {
tmp = -y / (2.0 - y);
} else {
tmp = x / (2.0 - x);
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (x <= (-2.2d+58)) then
tmp = -1.0d0
else if (x <= 2.5d-159) then
tmp = -y / (2.0d0 - y)
else
tmp = x / (2.0d0 - x)
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -2.2e+58) {
tmp = -1.0;
} else if (x <= 2.5e-159) {
tmp = -y / (2.0 - y);
} else {
tmp = x / (2.0 - x);
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -2.2e+58: tmp = -1.0 elif x <= 2.5e-159: tmp = -y / (2.0 - y) else: tmp = x / (2.0 - x) return tmp
function code(x, y) tmp = 0.0 if (x <= -2.2e+58) tmp = -1.0; elseif (x <= 2.5e-159) tmp = Float64(Float64(-y) / Float64(2.0 - y)); else tmp = Float64(x / Float64(2.0 - x)); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -2.2e+58) tmp = -1.0; elseif (x <= 2.5e-159) tmp = -y / (2.0 - y); else tmp = x / (2.0 - x); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -2.2e+58], -1.0, If[LessEqual[x, 2.5e-159], N[((-y) / N[(2.0 - y), $MachinePrecision]), $MachinePrecision], N[(x / N[(2.0 - x), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -2.2 \cdot 10^{+58}:\\
\;\;\;\;-1\\
\mathbf{elif}\;x \leq 2.5 \cdot 10^{-159}:\\
\;\;\;\;\frac{-y}{2 - y}\\
\mathbf{else}:\\
\;\;\;\;\frac{x}{2 - x}\\
\end{array}
\end{array}
if x < -2.2000000000000001e58Initial program 100.0%
associate--r+100.0%
Simplified100.0%
Taylor expanded in x around inf 82.0%
if -2.2000000000000001e58 < x < 2.50000000000000016e-159Initial program 100.0%
associate--r+100.0%
Simplified100.0%
Taylor expanded in x around 0 81.2%
mul-1-neg81.2%
distribute-neg-frac81.2%
Simplified81.2%
if 2.50000000000000016e-159 < x Initial program 100.0%
associate--r+100.0%
Simplified100.0%
Taylor expanded in y around 0 66.8%
Final simplification76.5%
(FPCore (x y)
:precision binary64
(if (<= x -1.65e+57)
-1.0
(if (<= x 7.2e-165)
1.0
(if (<= x 3.2e-59) (* x 0.5) (if (<= x 52000000000000.0) 1.0 -1.0)))))
double code(double x, double y) {
double tmp;
if (x <= -1.65e+57) {
tmp = -1.0;
} else if (x <= 7.2e-165) {
tmp = 1.0;
} else if (x <= 3.2e-59) {
tmp = x * 0.5;
} else if (x <= 52000000000000.0) {
tmp = 1.0;
} else {
tmp = -1.0;
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (x <= (-1.65d+57)) then
tmp = -1.0d0
else if (x <= 7.2d-165) then
tmp = 1.0d0
else if (x <= 3.2d-59) then
tmp = x * 0.5d0
else if (x <= 52000000000000.0d0) then
tmp = 1.0d0
else
tmp = -1.0d0
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -1.65e+57) {
tmp = -1.0;
} else if (x <= 7.2e-165) {
tmp = 1.0;
} else if (x <= 3.2e-59) {
tmp = x * 0.5;
} else if (x <= 52000000000000.0) {
tmp = 1.0;
} else {
tmp = -1.0;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.65e+57: tmp = -1.0 elif x <= 7.2e-165: tmp = 1.0 elif x <= 3.2e-59: tmp = x * 0.5 elif x <= 52000000000000.0: tmp = 1.0 else: tmp = -1.0 return tmp
function code(x, y) tmp = 0.0 if (x <= -1.65e+57) tmp = -1.0; elseif (x <= 7.2e-165) tmp = 1.0; elseif (x <= 3.2e-59) tmp = Float64(x * 0.5); elseif (x <= 52000000000000.0) tmp = 1.0; else tmp = -1.0; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -1.65e+57) tmp = -1.0; elseif (x <= 7.2e-165) tmp = 1.0; elseif (x <= 3.2e-59) tmp = x * 0.5; elseif (x <= 52000000000000.0) tmp = 1.0; else tmp = -1.0; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.65e+57], -1.0, If[LessEqual[x, 7.2e-165], 1.0, If[LessEqual[x, 3.2e-59], N[(x * 0.5), $MachinePrecision], If[LessEqual[x, 52000000000000.0], 1.0, -1.0]]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.65 \cdot 10^{+57}:\\
\;\;\;\;-1\\
\mathbf{elif}\;x \leq 7.2 \cdot 10^{-165}:\\
\;\;\;\;1\\
\mathbf{elif}\;x \leq 3.2 \cdot 10^{-59}:\\
\;\;\;\;x \cdot 0.5\\
\mathbf{elif}\;x \leq 52000000000000:\\
\;\;\;\;1\\
\mathbf{else}:\\
\;\;\;\;-1\\
\end{array}
\end{array}
if x < -1.6500000000000001e57 or 5.2e13 < x Initial program 99.9%
associate--r+99.9%
Simplified99.9%
Taylor expanded in x around inf 78.6%
if -1.6500000000000001e57 < x < 7.19999999999999969e-165 or 3.1999999999999999e-59 < x < 5.2e13Initial program 100.0%
associate--r+100.0%
Simplified100.0%
Taylor expanded in y around inf 53.3%
if 7.19999999999999969e-165 < x < 3.1999999999999999e-59Initial program 100.0%
associate--r+100.0%
Simplified100.0%
Taylor expanded in y around 0 63.0%
Taylor expanded in x around 0 63.0%
*-commutative63.0%
Simplified63.0%
Final simplification65.8%
(FPCore (x y) :precision binary64 (if (<= y -2.8e+27) 1.0 (if (<= y 8.2e+48) (/ x (- 2.0 x)) 1.0)))
double code(double x, double y) {
double tmp;
if (y <= -2.8e+27) {
tmp = 1.0;
} else if (y <= 8.2e+48) {
tmp = x / (2.0 - x);
} else {
tmp = 1.0;
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (y <= (-2.8d+27)) then
tmp = 1.0d0
else if (y <= 8.2d+48) then
tmp = x / (2.0d0 - x)
else
tmp = 1.0d0
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (y <= -2.8e+27) {
tmp = 1.0;
} else if (y <= 8.2e+48) {
tmp = x / (2.0 - x);
} else {
tmp = 1.0;
}
return tmp;
}
def code(x, y): tmp = 0 if y <= -2.8e+27: tmp = 1.0 elif y <= 8.2e+48: tmp = x / (2.0 - x) else: tmp = 1.0 return tmp
function code(x, y) tmp = 0.0 if (y <= -2.8e+27) tmp = 1.0; elseif (y <= 8.2e+48) tmp = Float64(x / Float64(2.0 - x)); else tmp = 1.0; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (y <= -2.8e+27) tmp = 1.0; elseif (y <= 8.2e+48) tmp = x / (2.0 - x); else tmp = 1.0; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, -2.8e+27], 1.0, If[LessEqual[y, 8.2e+48], N[(x / N[(2.0 - x), $MachinePrecision]), $MachinePrecision], 1.0]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -2.8 \cdot 10^{+27}:\\
\;\;\;\;1\\
\mathbf{elif}\;y \leq 8.2 \cdot 10^{+48}:\\
\;\;\;\;\frac{x}{2 - x}\\
\mathbf{else}:\\
\;\;\;\;1\\
\end{array}
\end{array}
if y < -2.7999999999999999e27 or 8.2000000000000005e48 < y Initial program 99.9%
associate--r+99.9%
Simplified99.9%
Taylor expanded in y around inf 76.8%
if -2.7999999999999999e27 < y < 8.2000000000000005e48Initial program 100.0%
associate--r+100.0%
Simplified100.0%
Taylor expanded in y around 0 73.7%
Final simplification75.1%
(FPCore (x y) :precision binary64 (if (<= x -2e+58) -1.0 (if (<= x 1.65e+14) 1.0 -1.0)))
double code(double x, double y) {
double tmp;
if (x <= -2e+58) {
tmp = -1.0;
} else if (x <= 1.65e+14) {
tmp = 1.0;
} else {
tmp = -1.0;
}
return tmp;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (x <= (-2d+58)) then
tmp = -1.0d0
else if (x <= 1.65d+14) then
tmp = 1.0d0
else
tmp = -1.0d0
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -2e+58) {
tmp = -1.0;
} else if (x <= 1.65e+14) {
tmp = 1.0;
} else {
tmp = -1.0;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -2e+58: tmp = -1.0 elif x <= 1.65e+14: tmp = 1.0 else: tmp = -1.0 return tmp
function code(x, y) tmp = 0.0 if (x <= -2e+58) tmp = -1.0; elseif (x <= 1.65e+14) tmp = 1.0; else tmp = -1.0; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -2e+58) tmp = -1.0; elseif (x <= 1.65e+14) tmp = 1.0; else tmp = -1.0; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -2e+58], -1.0, If[LessEqual[x, 1.65e+14], 1.0, -1.0]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -2 \cdot 10^{+58}:\\
\;\;\;\;-1\\
\mathbf{elif}\;x \leq 1.65 \cdot 10^{+14}:\\
\;\;\;\;1\\
\mathbf{else}:\\
\;\;\;\;-1\\
\end{array}
\end{array}
if x < -1.99999999999999989e58 or 1.65e14 < x Initial program 99.9%
associate--r+99.9%
Simplified99.9%
Taylor expanded in x around inf 78.6%
if -1.99999999999999989e58 < x < 1.65e14Initial program 100.0%
associate--r+100.0%
Simplified100.0%
Taylor expanded in y around inf 49.3%
Final simplification62.9%
(FPCore (x y) :precision binary64 -1.0)
double code(double x, double y) {
return -1.0;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = -1.0d0
end function
public static double code(double x, double y) {
return -1.0;
}
def code(x, y): return -1.0
function code(x, y) return -1.0 end
function tmp = code(x, y) tmp = -1.0; end
code[x_, y_] := -1.0
\begin{array}{l}
\\
-1
\end{array}
Initial program 100.0%
associate--r+100.0%
Simplified100.0%
Taylor expanded in x around inf 38.8%
Final simplification38.8%
(FPCore (x y) :precision binary64 (let* ((t_0 (- 2.0 (+ x y)))) (- (/ x t_0) (/ y t_0))))
double code(double x, double y) {
double t_0 = 2.0 - (x + y);
return (x / t_0) - (y / t_0);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: t_0
t_0 = 2.0d0 - (x + y)
code = (x / t_0) - (y / t_0)
end function
public static double code(double x, double y) {
double t_0 = 2.0 - (x + y);
return (x / t_0) - (y / t_0);
}
def code(x, y): t_0 = 2.0 - (x + y) return (x / t_0) - (y / t_0)
function code(x, y) t_0 = Float64(2.0 - Float64(x + y)) return Float64(Float64(x / t_0) - Float64(y / t_0)) end
function tmp = code(x, y) t_0 = 2.0 - (x + y); tmp = (x / t_0) - (y / t_0); end
code[x_, y_] := Block[{t$95$0 = N[(2.0 - N[(x + y), $MachinePrecision]), $MachinePrecision]}, N[(N[(x / t$95$0), $MachinePrecision] - N[(y / t$95$0), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := 2 - \left(x + y\right)\\
\frac{x}{t_0} - \frac{y}{t_0}
\end{array}
\end{array}
herbie shell --seed 2023257
(FPCore (x y)
:name "Data.Colour.RGB:hslsv from colour-2.3.3, C"
:precision binary64
:herbie-target
(- (/ x (- 2.0 (+ x y))) (/ y (- 2.0 (+ x y))))
(/ (- x y) (- 2.0 (+ x y))))