
(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 6 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%
Final simplification100.0%
(FPCore (x y) :precision binary64 (if (<= x -9.5e-154) x (if (<= x 1.0) y (* x (- y)))))
double code(double x, double y) {
double tmp;
if (x <= -9.5e-154) {
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 <= (-9.5d-154)) 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 <= -9.5e-154) {
tmp = x;
} else if (x <= 1.0) {
tmp = y;
} else {
tmp = x * -y;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -9.5e-154: tmp = x elif x <= 1.0: tmp = y else: tmp = x * -y return tmp
function code(x, y) tmp = 0.0 if (x <= -9.5e-154) 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 <= -9.5e-154) tmp = x; elseif (x <= 1.0) tmp = y; else tmp = x * -y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -9.5e-154], x, If[LessEqual[x, 1.0], y, N[(x * (-y)), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -9.5 \cdot 10^{-154}:\\
\;\;\;\;x\\
\mathbf{elif}\;x \leq 1:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;x \cdot \left(-y\right)\\
\end{array}
\end{array}
if x < -9.50000000000000057e-154Initial program 100.0%
Taylor expanded in y around 0 56.7%
if -9.50000000000000057e-154 < x < 1Initial program 100.0%
Taylor expanded in x around 0 78.2%
if 1 < x Initial program 100.0%
Taylor expanded in x around inf 98.3%
Taylor expanded in y around inf 43.1%
mul-1-neg43.1%
distribute-rgt-neg-out43.1%
Simplified43.1%
Final simplification61.9%
(FPCore (x y) :precision binary64 (if (<= x -9.5e-154) (* x (- 1.0 y)) (if (<= x 1.0) y (* x (- y)))))
double code(double x, double y) {
double tmp;
if (x <= -9.5e-154) {
tmp = x * (1.0 - 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 <= (-9.5d-154)) then
tmp = x * (1.0d0 - 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 <= -9.5e-154) {
tmp = x * (1.0 - y);
} else if (x <= 1.0) {
tmp = y;
} else {
tmp = x * -y;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -9.5e-154: tmp = x * (1.0 - y) elif x <= 1.0: tmp = y else: tmp = x * -y return tmp
function code(x, y) tmp = 0.0 if (x <= -9.5e-154) tmp = Float64(x * Float64(1.0 - 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 <= -9.5e-154) tmp = x * (1.0 - y); elseif (x <= 1.0) tmp = y; else tmp = x * -y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -9.5e-154], N[(x * N[(1.0 - y), $MachinePrecision]), $MachinePrecision], If[LessEqual[x, 1.0], y, N[(x * (-y)), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -9.5 \cdot 10^{-154}:\\
\;\;\;\;x \cdot \left(1 - y\right)\\
\mathbf{elif}\;x \leq 1:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;x \cdot \left(-y\right)\\
\end{array}
\end{array}
if x < -9.50000000000000057e-154Initial program 100.0%
Taylor expanded in x around inf 86.5%
if -9.50000000000000057e-154 < x < 1Initial program 100.0%
Taylor expanded in x around 0 78.2%
if 1 < x Initial program 100.0%
Taylor expanded in x around inf 98.3%
Taylor expanded in y around inf 43.1%
mul-1-neg43.1%
distribute-rgt-neg-out43.1%
Simplified43.1%
Final simplification72.7%
(FPCore (x y) :precision binary64 (if (<= x -9.5e-154) (* x (- 1.0 y)) (- y (* x y))))
double code(double x, double y) {
double tmp;
if (x <= -9.5e-154) {
tmp = x * (1.0 - 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 <= (-9.5d-154)) then
tmp = x * (1.0d0 - y)
else
tmp = y - (x * y)
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -9.5e-154) {
tmp = x * (1.0 - y);
} else {
tmp = y - (x * y);
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -9.5e-154: tmp = x * (1.0 - y) else: tmp = y - (x * y) return tmp
function code(x, y) tmp = 0.0 if (x <= -9.5e-154) tmp = Float64(x * Float64(1.0 - y)); else tmp = Float64(y - Float64(x * y)); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -9.5e-154) tmp = x * (1.0 - y); else tmp = y - (x * y); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -9.5e-154], N[(x * N[(1.0 - y), $MachinePrecision]), $MachinePrecision], N[(y - N[(x * y), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -9.5 \cdot 10^{-154}:\\
\;\;\;\;x \cdot \left(1 - y\right)\\
\mathbf{else}:\\
\;\;\;\;y - x \cdot y\\
\end{array}
\end{array}
if x < -9.50000000000000057e-154Initial program 100.0%
Taylor expanded in x around inf 86.5%
if -9.50000000000000057e-154 < x Initial program 100.0%
Taylor expanded in y around inf 66.1%
distribute-lft-out--66.1%
*-rgt-identity66.1%
Simplified66.1%
Final simplification73.5%
(FPCore (x y) :precision binary64 (if (<= x -9.5e-154) x y))
double code(double x, double y) {
double tmp;
if (x <= -9.5e-154) {
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 (x <= (-9.5d-154)) then
tmp = x
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -9.5e-154) {
tmp = x;
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -9.5e-154: tmp = x else: tmp = y return tmp
function code(x, y) tmp = 0.0 if (x <= -9.5e-154) tmp = x; else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -9.5e-154) tmp = x; else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -9.5e-154], x, y]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -9.5 \cdot 10^{-154}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if x < -9.50000000000000057e-154Initial program 100.0%
Taylor expanded in y around 0 56.7%
if -9.50000000000000057e-154 < x Initial program 100.0%
Taylor expanded in x around 0 49.1%
Final simplification51.8%
(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 y around 0 42.1%
Final simplification42.1%
herbie shell --seed 2023278
(FPCore (x y)
:name "Data.Colour.RGBSpace.HSL:hsl from colour-2.3.3, A"
:precision binary64
(- (+ x y) (* x y)))