
(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 9 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 (fma x (- 1.0 y) y))
double code(double x, double y) {
return fma(x, (1.0 - y), y);
}
function code(x, y) return fma(x, Float64(1.0 - y), y) end
code[x_, y_] := N[(x * N[(1.0 - y), $MachinePrecision] + y), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(x, 1 - y, y\right)
\end{array}
Initial program 100.0%
+-commutative100.0%
*-commutative100.0%
associate--l+100.0%
+-commutative100.0%
*-lft-identity100.0%
metadata-eval100.0%
distribute-rgt-out--100.0%
fma-define100.0%
metadata-eval100.0%
Simplified100.0%
(FPCore (x y) :precision binary64 (if (<= y -1.0) (* x (- y)) (if (<= y 4.1e-103) x (* y (- 1.0 x)))))
double code(double x, double y) {
double tmp;
if (y <= -1.0) {
tmp = x * -y;
} else if (y <= 4.1e-103) {
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 <= 4.1d-103) 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 <= 4.1e-103) {
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 <= 4.1e-103: 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 <= 4.1e-103) 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 <= 4.1e-103) 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, 4.1e-103], 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 4.1 \cdot 10^{-103}:\\
\;\;\;\;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 98.0%
Taylor expanded in x around inf 46.8%
associate-*r*46.8%
neg-mul-146.8%
*-commutative46.8%
Simplified46.8%
if -1 < y < 4.09999999999999996e-103Initial program 100.0%
Taylor expanded in x around inf 82.7%
Taylor expanded in y around 0 82.1%
if 4.09999999999999996e-103 < y Initial program 100.0%
Taylor expanded in y around inf 85.6%
Final simplification75.1%
(FPCore (x y) :precision binary64 (if (<= x -6.4e-153) x (if (<= x 1.0) y (* x (- y)))))
double code(double x, double y) {
double tmp;
if (x <= -6.4e-153) {
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 <= (-6.4d-153)) 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 <= -6.4e-153) {
tmp = x;
} else if (x <= 1.0) {
tmp = y;
} else {
tmp = x * -y;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -6.4e-153: tmp = x elif x <= 1.0: tmp = y else: tmp = x * -y return tmp
function code(x, y) tmp = 0.0 if (x <= -6.4e-153) 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 <= -6.4e-153) tmp = x; elseif (x <= 1.0) tmp = y; else tmp = x * -y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -6.4e-153], x, If[LessEqual[x, 1.0], y, N[(x * (-y)), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -6.4 \cdot 10^{-153}:\\
\;\;\;\;x\\
\mathbf{elif}\;x \leq 1:\\
\;\;\;\;y\\
\mathbf{else}:\\
\;\;\;\;x \cdot \left(-y\right)\\
\end{array}
\end{array}
if x < -6.3999999999999998e-153Initial program 100.0%
Taylor expanded in x around inf 82.6%
Taylor expanded in y around 0 53.2%
if -6.3999999999999998e-153 < x < 1Initial program 100.0%
Taylor expanded in y around inf 78.2%
Taylor expanded in x around 0 77.1%
if 1 < x Initial program 100.0%
Taylor expanded in y around inf 47.0%
Taylor expanded in x around inf 47.0%
associate-*r*47.0%
neg-mul-147.0%
*-commutative47.0%
Simplified47.0%
Final simplification60.7%
(FPCore (x y) :precision binary64 (if (<= x -6.4e-153) (- x (* x y)) (- y (* x y))))
double code(double x, double y) {
double tmp;
if (x <= -6.4e-153) {
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 (x <= (-6.4d-153)) 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 (x <= -6.4e-153) {
tmp = x - (x * y);
} else {
tmp = y - (x * y);
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -6.4e-153: tmp = x - (x * y) else: tmp = y - (x * y) return tmp
function code(x, y) tmp = 0.0 if (x <= -6.4e-153) 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 (x <= -6.4e-153) tmp = x - (x * y); else tmp = y - (x * y); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -6.4e-153], N[(x - N[(x * y), $MachinePrecision]), $MachinePrecision], N[(y - N[(x * y), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -6.4 \cdot 10^{-153}:\\
\;\;\;\;x - x \cdot y\\
\mathbf{else}:\\
\;\;\;\;y - x \cdot y\\
\end{array}
\end{array}
if x < -6.3999999999999998e-153Initial program 100.0%
Taylor expanded in x around inf 82.6%
if -6.3999999999999998e-153 < x Initial program 100.0%
Taylor expanded in x around 0 65.8%
(FPCore (x y) :precision binary64 (if (<= x -6.4e-153) (- x (* x y)) (* y (- 1.0 x))))
double code(double x, double y) {
double tmp;
if (x <= -6.4e-153) {
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 <= (-6.4d-153)) 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 <= -6.4e-153) {
tmp = x - (x * y);
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -6.4e-153: tmp = x - (x * y) else: tmp = y * (1.0 - x) return tmp
function code(x, y) tmp = 0.0 if (x <= -6.4e-153) 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 <= -6.4e-153) tmp = x - (x * y); else tmp = y * (1.0 - x); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -6.4e-153], 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 -6.4 \cdot 10^{-153}:\\
\;\;\;\;x - x \cdot y\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(1 - x\right)\\
\end{array}
\end{array}
if x < -6.3999999999999998e-153Initial program 100.0%
Taylor expanded in x around inf 82.6%
if -6.3999999999999998e-153 < x Initial program 100.0%
Taylor expanded in y around inf 65.8%
(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 5.6e-104) x y))
double code(double x, double y) {
double tmp;
if (y <= 5.6e-104) {
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 <= 5.6d-104) then
tmp = x
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (y <= 5.6e-104) {
tmp = x;
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if y <= 5.6e-104: tmp = x else: tmp = y return tmp
function code(x, y) tmp = 0.0 if (y <= 5.6e-104) tmp = x; else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (y <= 5.6e-104) tmp = x; else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, 5.6e-104], x, y]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq 5.6 \cdot 10^{-104}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if y < 5.6e-104Initial program 100.0%
Taylor expanded in x around inf 70.8%
Taylor expanded in y around 0 55.0%
if 5.6e-104 < y Initial program 100.0%
Taylor expanded in y around inf 84.6%
Taylor expanded in x around 0 50.4%
(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 64.3%
Taylor expanded in y around 0 41.8%
(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 59.8%
Taylor expanded in x around inf 24.9%
associate-*r*24.9%
neg-mul-124.9%
*-commutative24.9%
Simplified24.9%
add-log-exp15.7%
add-sqr-sqrt15.7%
sqrt-unprod15.7%
exp-prod15.6%
add-sqr-sqrt8.5%
sqrt-unprod8.8%
sqr-neg8.8%
sqrt-unprod1.9%
add-sqr-sqrt2.3%
pow-flip2.3%
exp-prod1.8%
rgt-mult-inverse2.7%
metadata-eval2.7%
metadata-eval2.7%
Applied egg-rr2.7%
herbie shell --seed 2024130
(FPCore (x y)
:name "Data.Colour.RGBSpace.HSL:hsl from colour-2.3.3, A"
:precision binary64
(- (+ x y) (* x y)))