
(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}
NOTE: x and y should be sorted in increasing order before calling this function. (FPCore (x y) :precision binary64 (fma x (- 1.0 y) y))
assert(x < y);
double code(double x, double y) {
return fma(x, (1.0 - y), y);
}
x, y = sort([x, y]) function code(x, y) return fma(x, Float64(1.0 - y), y) end
NOTE: x and y should be sorted in increasing order before calling this function. code[x_, y_] := N[(x * N[(1.0 - y), $MachinePrecision] + y), $MachinePrecision]
\begin{array}{l}
[x, y] = \mathsf{sort}([x, y])\\
\\
\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%
NOTE: x and y should be sorted in increasing order before calling this function. (FPCore (x y) :precision binary64 (if (<= y -6.6e+25) (* x (- y)) (if (<= y 1.0) (+ x y) (- y (* x y)))))
assert(x < y);
double code(double x, double y) {
double tmp;
if (y <= -6.6e+25) {
tmp = x * -y;
} else if (y <= 1.0) {
tmp = x + y;
} else {
tmp = y - (x * y);
}
return tmp;
}
NOTE: x and y should be sorted in increasing order before calling this function.
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (y <= (-6.6d+25)) then
tmp = x * -y
else if (y <= 1.0d0) then
tmp = x + y
else
tmp = y - (x * y)
end if
code = tmp
end function
assert x < y;
public static double code(double x, double y) {
double tmp;
if (y <= -6.6e+25) {
tmp = x * -y;
} else if (y <= 1.0) {
tmp = x + y;
} else {
tmp = y - (x * y);
}
return tmp;
}
[x, y] = sort([x, y]) def code(x, y): tmp = 0 if y <= -6.6e+25: tmp = x * -y elif y <= 1.0: tmp = x + y else: tmp = y - (x * y) return tmp
x, y = sort([x, y]) function code(x, y) tmp = 0.0 if (y <= -6.6e+25) tmp = Float64(x * Float64(-y)); elseif (y <= 1.0) tmp = Float64(x + y); else tmp = Float64(y - Float64(x * y)); end return tmp end
x, y = num2cell(sort([x, y])){:}
function tmp_2 = code(x, y)
tmp = 0.0;
if (y <= -6.6e+25)
tmp = x * -y;
elseif (y <= 1.0)
tmp = x + y;
else
tmp = y - (x * y);
end
tmp_2 = tmp;
end
NOTE: x and y should be sorted in increasing order before calling this function. code[x_, y_] := If[LessEqual[y, -6.6e+25], N[(x * (-y)), $MachinePrecision], If[LessEqual[y, 1.0], N[(x + y), $MachinePrecision], N[(y - N[(x * y), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
[x, y] = \mathsf{sort}([x, y])\\
\\
\begin{array}{l}
\mathbf{if}\;y \leq -6.6 \cdot 10^{+25}:\\
\;\;\;\;x \cdot \left(-y\right)\\
\mathbf{elif}\;y \leq 1:\\
\;\;\;\;x + y\\
\mathbf{else}:\\
\;\;\;\;y - x \cdot y\\
\end{array}
\end{array}
if y < -6.6000000000000002e25Initial program 100.0%
associate--l+100.0%
+-commutative100.0%
remove-double-neg100.0%
unsub-neg100.0%
cancel-sign-sub-inv100.0%
associate--l+100.0%
neg-mul-1100.0%
cancel-sign-sub-inv100.0%
distribute-lft-neg-out100.0%
distribute-rgt-neg-out100.0%
*-commutative100.0%
distribute-rgt-out100.0%
+-commutative100.0%
sub-neg100.0%
metadata-eval100.0%
Simplified100.0%
Taylor expanded in y around inf 100.0%
neg-mul-1100.0%
sub-neg100.0%
Simplified100.0%
Taylor expanded in x around inf 42.9%
mul-1-neg42.9%
distribute-rgt-neg-in42.9%
Simplified42.9%
if -6.6000000000000002e25 < y < 1Initial program 100.0%
associate--l+100.0%
+-commutative100.0%
remove-double-neg100.0%
unsub-neg100.0%
cancel-sign-sub-inv100.0%
associate--l+100.0%
neg-mul-1100.0%
cancel-sign-sub-inv100.0%
distribute-lft-neg-out100.0%
distribute-rgt-neg-out100.0%
*-commutative100.0%
distribute-rgt-out100.0%
+-commutative100.0%
sub-neg100.0%
metadata-eval100.0%
Simplified100.0%
Taylor expanded in y around 0 95.8%
if 1 < y Initial program 100.0%
associate--l+100.0%
+-commutative100.0%
remove-double-neg100.0%
unsub-neg100.0%
cancel-sign-sub-inv100.0%
associate--l+100.0%
neg-mul-1100.0%
cancel-sign-sub-inv100.0%
distribute-lft-neg-out100.0%
distribute-rgt-neg-out100.0%
*-commutative100.0%
distribute-rgt-out100.0%
+-commutative100.0%
sub-neg100.0%
metadata-eval100.0%
Simplified100.0%
Taylor expanded in y around inf 98.3%
neg-mul-198.3%
sub-neg98.3%
Simplified98.3%
Taylor expanded in x around 0 98.3%
mul-1-neg98.3%
*-commutative98.3%
sub-neg98.3%
Simplified98.3%
Final simplification85.7%
NOTE: x and y should be sorted in increasing order before calling this function. (FPCore (x y) :precision binary64 (if (<= y -54000000000.0) (* x (- y)) (if (<= y 1.0) (+ x y) (* y (- 1.0 x)))))
assert(x < y);
double code(double x, double y) {
double tmp;
if (y <= -54000000000.0) {
tmp = x * -y;
} else if (y <= 1.0) {
tmp = x + y;
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
NOTE: x and y should be sorted in increasing order before calling this function.
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (y <= (-54000000000.0d0)) then
tmp = x * -y
else if (y <= 1.0d0) then
tmp = x + y
else
tmp = y * (1.0d0 - x)
end if
code = tmp
end function
assert x < y;
public static double code(double x, double y) {
double tmp;
if (y <= -54000000000.0) {
tmp = x * -y;
} else if (y <= 1.0) {
tmp = x + y;
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
[x, y] = sort([x, y]) def code(x, y): tmp = 0 if y <= -54000000000.0: tmp = x * -y elif y <= 1.0: tmp = x + y else: tmp = y * (1.0 - x) return tmp
x, y = sort([x, y]) function code(x, y) tmp = 0.0 if (y <= -54000000000.0) tmp = Float64(x * Float64(-y)); elseif (y <= 1.0) tmp = Float64(x + y); else tmp = Float64(y * Float64(1.0 - x)); end return tmp end
x, y = num2cell(sort([x, y])){:}
function tmp_2 = code(x, y)
tmp = 0.0;
if (y <= -54000000000.0)
tmp = x * -y;
elseif (y <= 1.0)
tmp = x + y;
else
tmp = y * (1.0 - x);
end
tmp_2 = tmp;
end
NOTE: x and y should be sorted in increasing order before calling this function. code[x_, y_] := If[LessEqual[y, -54000000000.0], N[(x * (-y)), $MachinePrecision], If[LessEqual[y, 1.0], N[(x + y), $MachinePrecision], N[(y * N[(1.0 - x), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
[x, y] = \mathsf{sort}([x, y])\\
\\
\begin{array}{l}
\mathbf{if}\;y \leq -54000000000:\\
\;\;\;\;x \cdot \left(-y\right)\\
\mathbf{elif}\;y \leq 1:\\
\;\;\;\;x + y\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(1 - x\right)\\
\end{array}
\end{array}
if y < -5.4e10Initial program 100.0%
associate--l+100.0%
+-commutative100.0%
remove-double-neg100.0%
unsub-neg100.0%
cancel-sign-sub-inv100.0%
associate--l+100.0%
neg-mul-1100.0%
cancel-sign-sub-inv100.0%
distribute-lft-neg-out100.0%
distribute-rgt-neg-out100.0%
*-commutative100.0%
distribute-rgt-out100.0%
+-commutative100.0%
sub-neg100.0%
metadata-eval100.0%
Simplified100.0%
Taylor expanded in y around inf 100.0%
neg-mul-1100.0%
sub-neg100.0%
Simplified100.0%
Taylor expanded in x around inf 41.2%
mul-1-neg41.2%
distribute-rgt-neg-in41.2%
Simplified41.2%
if -5.4e10 < y < 1Initial program 100.0%
associate--l+100.0%
+-commutative100.0%
remove-double-neg100.0%
unsub-neg100.0%
cancel-sign-sub-inv100.0%
associate--l+100.0%
neg-mul-1100.0%
cancel-sign-sub-inv100.0%
distribute-lft-neg-out100.0%
distribute-rgt-neg-out100.0%
*-commutative100.0%
distribute-rgt-out100.0%
+-commutative100.0%
sub-neg100.0%
metadata-eval100.0%
Simplified100.0%
Taylor expanded in y around 0 96.3%
if 1 < y Initial program 100.0%
associate--l+100.0%
+-commutative100.0%
remove-double-neg100.0%
unsub-neg100.0%
cancel-sign-sub-inv100.0%
associate--l+100.0%
neg-mul-1100.0%
cancel-sign-sub-inv100.0%
distribute-lft-neg-out100.0%
distribute-rgt-neg-out100.0%
*-commutative100.0%
distribute-rgt-out100.0%
+-commutative100.0%
sub-neg100.0%
metadata-eval100.0%
Simplified100.0%
Taylor expanded in y around inf 98.3%
neg-mul-198.3%
sub-neg98.3%
Simplified98.3%
Final simplification84.6%
NOTE: x and y should be sorted in increasing order before calling this function. (FPCore (x y) :precision binary64 (if (<= x 220000.0) (+ x y) (* x (- y))))
assert(x < y);
double code(double x, double y) {
double tmp;
if (x <= 220000.0) {
tmp = x + y;
} else {
tmp = x * -y;
}
return tmp;
}
NOTE: x and y should be sorted in increasing order before calling this function.
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8) :: tmp
if (x <= 220000.0d0) then
tmp = x + y
else
tmp = x * -y
end if
code = tmp
end function
assert x < y;
public static double code(double x, double y) {
double tmp;
if (x <= 220000.0) {
tmp = x + y;
} else {
tmp = x * -y;
}
return tmp;
}
[x, y] = sort([x, y]) def code(x, y): tmp = 0 if x <= 220000.0: tmp = x + y else: tmp = x * -y return tmp
x, y = sort([x, y]) function code(x, y) tmp = 0.0 if (x <= 220000.0) tmp = Float64(x + y); else tmp = Float64(x * Float64(-y)); end return tmp end
x, y = num2cell(sort([x, y])){:}
function tmp_2 = code(x, y)
tmp = 0.0;
if (x <= 220000.0)
tmp = x + y;
else
tmp = x * -y;
end
tmp_2 = tmp;
end
NOTE: x and y should be sorted in increasing order before calling this function. code[x_, y_] := If[LessEqual[x, 220000.0], N[(x + y), $MachinePrecision], N[(x * (-y)), $MachinePrecision]]
\begin{array}{l}
[x, y] = \mathsf{sort}([x, y])\\
\\
\begin{array}{l}
\mathbf{if}\;x \leq 220000:\\
\;\;\;\;x + y\\
\mathbf{else}:\\
\;\;\;\;x \cdot \left(-y\right)\\
\end{array}
\end{array}
if x < 2.2e5Initial program 100.0%
associate--l+100.0%
+-commutative100.0%
remove-double-neg100.0%
unsub-neg100.0%
cancel-sign-sub-inv100.0%
associate--l+100.0%
neg-mul-1100.0%
cancel-sign-sub-inv100.0%
distribute-lft-neg-out100.0%
distribute-rgt-neg-out100.0%
*-commutative100.0%
distribute-rgt-out100.0%
+-commutative100.0%
sub-neg100.0%
metadata-eval100.0%
Simplified100.0%
Taylor expanded in y around 0 83.7%
if 2.2e5 < x Initial program 100.0%
associate--l+100.0%
+-commutative100.0%
remove-double-neg100.0%
unsub-neg100.0%
cancel-sign-sub-inv100.0%
associate--l+100.0%
neg-mul-1100.0%
cancel-sign-sub-inv100.0%
distribute-lft-neg-out100.0%
distribute-rgt-neg-out100.0%
*-commutative100.0%
distribute-rgt-out100.0%
+-commutative100.0%
sub-neg100.0%
metadata-eval100.0%
Simplified100.0%
Taylor expanded in y around inf 44.0%
neg-mul-144.0%
sub-neg44.0%
Simplified44.0%
Taylor expanded in x around inf 44.0%
mul-1-neg44.0%
distribute-rgt-neg-in44.0%
Simplified44.0%
Final simplification72.4%
NOTE: x and y should be sorted in increasing order before calling this function. (FPCore (x y) :precision binary64 (+ y (* x (- 1.0 y))))
assert(x < y);
double code(double x, double y) {
return y + (x * (1.0 - y));
}
NOTE: x and y should be sorted in increasing order before calling this function.
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = y + (x * (1.0d0 - y))
end function
assert x < y;
public static double code(double x, double y) {
return y + (x * (1.0 - y));
}
[x, y] = sort([x, y]) def code(x, y): return y + (x * (1.0 - y))
x, y = sort([x, y]) function code(x, y) return Float64(y + Float64(x * Float64(1.0 - y))) end
x, y = num2cell(sort([x, y])){:}
function tmp = code(x, y)
tmp = y + (x * (1.0 - y));
end
NOTE: x and y should be sorted in increasing order before calling this function. code[x_, y_] := N[(y + N[(x * N[(1.0 - y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
[x, y] = \mathsf{sort}([x, y])\\
\\
y + x \cdot \left(1 - y\right)
\end{array}
Initial program 100.0%
associate--l+100.0%
+-commutative100.0%
remove-double-neg100.0%
unsub-neg100.0%
cancel-sign-sub-inv100.0%
associate--l+100.0%
neg-mul-1100.0%
cancel-sign-sub-inv100.0%
distribute-lft-neg-out100.0%
distribute-rgt-neg-out100.0%
*-commutative100.0%
distribute-rgt-out100.0%
+-commutative100.0%
sub-neg100.0%
metadata-eval100.0%
Simplified100.0%
NOTE: x and y should be sorted in increasing order before calling this function. (FPCore (x y) :precision binary64 (+ x y))
assert(x < y);
double code(double x, double y) {
return x + y;
}
NOTE: x and y should be sorted in increasing order before calling this function.
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = x + y
end function
assert x < y;
public static double code(double x, double y) {
return x + y;
}
[x, y] = sort([x, y]) def code(x, y): return x + y
x, y = sort([x, y]) function code(x, y) return Float64(x + y) end
x, y = num2cell(sort([x, y])){:}
function tmp = code(x, y)
tmp = x + y;
end
NOTE: x and y should be sorted in increasing order before calling this function. code[x_, y_] := N[(x + y), $MachinePrecision]
\begin{array}{l}
[x, y] = \mathsf{sort}([x, y])\\
\\
x + y
\end{array}
Initial program 100.0%
associate--l+100.0%
+-commutative100.0%
remove-double-neg100.0%
unsub-neg100.0%
cancel-sign-sub-inv100.0%
associate--l+100.0%
neg-mul-1100.0%
cancel-sign-sub-inv100.0%
distribute-lft-neg-out100.0%
distribute-rgt-neg-out100.0%
*-commutative100.0%
distribute-rgt-out100.0%
+-commutative100.0%
sub-neg100.0%
metadata-eval100.0%
Simplified100.0%
Taylor expanded in y around 0 75.7%
Final simplification75.7%
NOTE: x and y should be sorted in increasing order before calling this function. (FPCore (x y) :precision binary64 y)
assert(x < y);
double code(double x, double y) {
return y;
}
NOTE: x and y should be sorted in increasing order before calling this function.
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = y
end function
assert x < y;
public static double code(double x, double y) {
return y;
}
[x, y] = sort([x, y]) def code(x, y): return y
x, y = sort([x, y]) function code(x, y) return y end
x, y = num2cell(sort([x, y])){:}
function tmp = code(x, y)
tmp = y;
end
NOTE: x and y should be sorted in increasing order before calling this function. code[x_, y_] := y
\begin{array}{l}
[x, y] = \mathsf{sort}([x, y])\\
\\
y
\end{array}
Initial program 100.0%
associate--l+100.0%
+-commutative100.0%
remove-double-neg100.0%
unsub-neg100.0%
cancel-sign-sub-inv100.0%
associate--l+100.0%
neg-mul-1100.0%
cancel-sign-sub-inv100.0%
distribute-lft-neg-out100.0%
distribute-rgt-neg-out100.0%
*-commutative100.0%
distribute-rgt-out100.0%
+-commutative100.0%
sub-neg100.0%
metadata-eval100.0%
Simplified100.0%
Taylor expanded in x around 0 38.3%
herbie shell --seed 2024100
(FPCore (x y)
:name "Data.Colour.RGBSpace.HSL:hsl from colour-2.3.3, A"
:precision binary64
(- (+ x y) (* x y)))