
(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%
Final simplification100.0%
(FPCore (x y)
:precision binary64
(let* ((t_0 (* y (- x))))
(if (<= x -1.12e+182)
x
(if (<= x -1.6e+157)
t_0
(if (<= x -9.5e+57)
x
(if (<= x -1.55e+19)
t_0
(if (<= x -1.8e-69) x (if (<= x 1.0) y t_0))))))))
double code(double x, double y) {
double t_0 = y * -x;
double tmp;
if (x <= -1.12e+182) {
tmp = x;
} else if (x <= -1.6e+157) {
tmp = t_0;
} else if (x <= -9.5e+57) {
tmp = x;
} else if (x <= -1.55e+19) {
tmp = t_0;
} else if (x <= -1.8e-69) {
tmp = x;
} else if (x <= 1.0) {
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 = y * -x
if (x <= (-1.12d+182)) then
tmp = x
else if (x <= (-1.6d+157)) then
tmp = t_0
else if (x <= (-9.5d+57)) then
tmp = x
else if (x <= (-1.55d+19)) then
tmp = t_0
else if (x <= (-1.8d-69)) then
tmp = x
else if (x <= 1.0d0) then
tmp = y
else
tmp = t_0
end if
code = tmp
end function
public static double code(double x, double y) {
double t_0 = y * -x;
double tmp;
if (x <= -1.12e+182) {
tmp = x;
} else if (x <= -1.6e+157) {
tmp = t_0;
} else if (x <= -9.5e+57) {
tmp = x;
} else if (x <= -1.55e+19) {
tmp = t_0;
} else if (x <= -1.8e-69) {
tmp = x;
} else if (x <= 1.0) {
tmp = y;
} else {
tmp = t_0;
}
return tmp;
}
def code(x, y): t_0 = y * -x tmp = 0 if x <= -1.12e+182: tmp = x elif x <= -1.6e+157: tmp = t_0 elif x <= -9.5e+57: tmp = x elif x <= -1.55e+19: tmp = t_0 elif x <= -1.8e-69: tmp = x elif x <= 1.0: tmp = y else: tmp = t_0 return tmp
function code(x, y) t_0 = Float64(y * Float64(-x)) tmp = 0.0 if (x <= -1.12e+182) tmp = x; elseif (x <= -1.6e+157) tmp = t_0; elseif (x <= -9.5e+57) tmp = x; elseif (x <= -1.55e+19) tmp = t_0; elseif (x <= -1.8e-69) tmp = x; elseif (x <= 1.0) tmp = y; else tmp = t_0; end return tmp end
function tmp_2 = code(x, y) t_0 = y * -x; tmp = 0.0; if (x <= -1.12e+182) tmp = x; elseif (x <= -1.6e+157) tmp = t_0; elseif (x <= -9.5e+57) tmp = x; elseif (x <= -1.55e+19) tmp = t_0; elseif (x <= -1.8e-69) tmp = x; elseif (x <= 1.0) tmp = y; else tmp = t_0; end tmp_2 = tmp; end
code[x_, y_] := Block[{t$95$0 = N[(y * (-x)), $MachinePrecision]}, If[LessEqual[x, -1.12e+182], x, If[LessEqual[x, -1.6e+157], t$95$0, If[LessEqual[x, -9.5e+57], x, If[LessEqual[x, -1.55e+19], t$95$0, If[LessEqual[x, -1.8e-69], x, If[LessEqual[x, 1.0], y, t$95$0]]]]]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := y \cdot \left(-x\right)\\
\mathbf{if}\;x \leq -1.12 \cdot 10^{+182}:\\
\;\;\;\;x\\
\mathbf{elif}\;x \leq -1.6 \cdot 10^{+157}:\\
\;\;\;\;t\_0\\
\mathbf{elif}\;x \leq -9.5 \cdot 10^{+57}:\\
\;\;\;\;x\\
\mathbf{elif}\;x \leq -1.55 \cdot 10^{+19}:\\
\;\;\;\;t\_0\\
\mathbf{elif}\;x \leq -1.8 \cdot 10^{-69}:\\
\;\;\;\;x\\
\mathbf{elif}\;x \leq 1:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;t\_0\\
\end{array}
\end{array}
if x < -1.11999999999999994e182 or -1.6e157 < x < -9.4999999999999997e57 or -1.55e19 < x < -1.80000000000000009e-69Initial program 100.0%
Taylor expanded in y around 0 55.5%
if -1.11999999999999994e182 < x < -1.6e157 or -9.4999999999999997e57 < x < -1.55e19 or 1 < x Initial program 100.0%
Taylor expanded in x around inf 99.8%
Taylor expanded in y around inf 59.0%
mul-1-neg59.0%
distribute-lft-neg-out59.0%
*-commutative59.0%
Simplified59.0%
if -1.80000000000000009e-69 < x < 1Initial program 100.0%
Taylor expanded in x around 0 75.7%
Final simplification65.1%
(FPCore (x y) :precision binary64 (if (or (<= x -4e-75) (not (<= x 7.2e-9))) (* x (- 1.0 y)) y))
double code(double x, double y) {
double tmp;
if ((x <= -4e-75) || !(x <= 7.2e-9)) {
tmp = x * (1.0 - y);
} 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 <= (-4d-75)) .or. (.not. (x <= 7.2d-9))) then
tmp = x * (1.0d0 - y)
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if ((x <= -4e-75) || !(x <= 7.2e-9)) {
tmp = x * (1.0 - y);
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if (x <= -4e-75) or not (x <= 7.2e-9): tmp = x * (1.0 - y) else: tmp = y return tmp
function code(x, y) tmp = 0.0 if ((x <= -4e-75) || !(x <= 7.2e-9)) tmp = Float64(x * Float64(1.0 - y)); else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if ((x <= -4e-75) || ~((x <= 7.2e-9))) tmp = x * (1.0 - y); else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[Or[LessEqual[x, -4e-75], N[Not[LessEqual[x, 7.2e-9]], $MachinePrecision]], N[(x * N[(1.0 - y), $MachinePrecision]), $MachinePrecision], y]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -4 \cdot 10^{-75} \lor \neg \left(x \leq 7.2 \cdot 10^{-9}\right):\\
\;\;\;\;x \cdot \left(1 - y\right)\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if x < -3.9999999999999998e-75 or 7.2e-9 < x Initial program 100.0%
Taylor expanded in x around inf 96.2%
if -3.9999999999999998e-75 < x < 7.2e-9Initial program 100.0%
Taylor expanded in x around 0 76.4%
Final simplification88.0%
(FPCore (x y) :precision binary64 (if (<= x -1.65e-69) (* x (- 1.0 y)) (* y (- 1.0 x))))
double code(double x, double y) {
double tmp;
if (x <= -1.65e-69) {
tmp = x * (1.0 - 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 (x <= (-1.65d-69)) then
tmp = x * (1.0d0 - y)
else
tmp = y * (1.0d0 - x)
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -1.65e-69) {
tmp = x * (1.0 - y);
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.65e-69: tmp = x * (1.0 - y) else: tmp = y * (1.0 - x) return tmp
function code(x, y) tmp = 0.0 if (x <= -1.65e-69) tmp = Float64(x * Float64(1.0 - y)); else tmp = Float64(y * Float64(1.0 - x)); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -1.65e-69) tmp = x * (1.0 - y); else tmp = y * (1.0 - x); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.65e-69], N[(x * N[(1.0 - y), $MachinePrecision]), $MachinePrecision], N[(y * N[(1.0 - x), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.65 \cdot 10^{-69}:\\
\;\;\;\;x \cdot \left(1 - y\right)\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(1 - x\right)\\
\end{array}
\end{array}
if x < -1.65e-69Initial program 100.0%
Taylor expanded in x around inf 92.8%
if -1.65e-69 < x Initial program 100.0%
Taylor expanded in y around inf 66.3%
Final simplification74.3%
(FPCore (x y) :precision binary64 (if (<= x -1.35e-70) (- x (* x y)) (* y (- 1.0 x))))
double code(double x, double y) {
double tmp;
if (x <= -1.35e-70) {
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 (x <= (-1.35d-70)) 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 (x <= -1.35e-70) {
tmp = x - (x * y);
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.35e-70: tmp = x - (x * y) else: tmp = y * (1.0 - x) return tmp
function code(x, y) tmp = 0.0 if (x <= -1.35e-70) 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 (x <= -1.35e-70) tmp = x - (x * y); else tmp = y * (1.0 - x); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.35e-70], N[(x - N[(x * y), $MachinePrecision]), $MachinePrecision], N[(y * N[(1.0 - x), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.35 \cdot 10^{-70}:\\
\;\;\;\;x - x \cdot y\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(1 - x\right)\\
\end{array}
\end{array}
if x < -1.3500000000000001e-70Initial program 100.0%
Taylor expanded in x around inf 92.8%
sub-neg92.8%
distribute-rgt-in92.8%
*-un-lft-identity92.8%
Applied egg-rr92.8%
if -1.3500000000000001e-70 < x Initial program 100.0%
Taylor expanded in y around inf 66.3%
Final simplification74.3%
(FPCore (x y) :precision binary64 (if (<= x -1.05e-71) x y))
double code(double x, double y) {
double tmp;
if (x <= -1.05e-71) {
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 <= (-1.05d-71)) then
tmp = x
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -1.05e-71) {
tmp = x;
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.05e-71: tmp = x else: tmp = y return tmp
function code(x, y) tmp = 0.0 if (x <= -1.05e-71) tmp = x; else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -1.05e-71) tmp = x; else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.05e-71], x, y]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.05 \cdot 10^{-71}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if x < -1.0500000000000001e-71Initial program 100.0%
Taylor expanded in y around 0 47.3%
if -1.0500000000000001e-71 < x Initial program 100.0%
Taylor expanded in x around 0 45.7%
Final simplification46.2%
(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 38.3%
Final simplification38.3%
herbie shell --seed 2024067
(FPCore (x y)
:name "Data.Colour.RGBSpace.HSL:hsl from colour-2.3.3, A"
:precision binary64
(- (+ x y) (* x y)))