
(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 8 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 -8500.0) (* x (- y)) (if (<= y 1.22e-14) (+ x y) (* y (- 1.0 x)))))
double code(double x, double y) {
double tmp;
if (y <= -8500.0) {
tmp = x * -y;
} else if (y <= 1.22e-14) {
tmp = 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 (y <= (-8500.0d0)) then
tmp = x * -y
else if (y <= 1.22d-14) then
tmp = 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 (y <= -8500.0) {
tmp = x * -y;
} else if (y <= 1.22e-14) {
tmp = x + y;
} else {
tmp = y * (1.0 - x);
}
return tmp;
}
def code(x, y): tmp = 0 if y <= -8500.0: tmp = x * -y elif y <= 1.22e-14: tmp = x + y else: tmp = y * (1.0 - x) return tmp
function code(x, y) tmp = 0.0 if (y <= -8500.0) tmp = Float64(x * Float64(-y)); elseif (y <= 1.22e-14) tmp = 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 (y <= -8500.0) tmp = x * -y; elseif (y <= 1.22e-14) tmp = x + y; else tmp = y * (1.0 - x); end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[y, -8500.0], N[(x * (-y)), $MachinePrecision], If[LessEqual[y, 1.22e-14], N[(x + y), $MachinePrecision], N[(y * N[(1.0 - x), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -8500:\\
\;\;\;\;x \cdot \left(-y\right)\\
\mathbf{elif}\;y \leq 1.22 \cdot 10^{-14}:\\
\;\;\;\;x + y\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(1 - x\right)\\
\end{array}
\end{array}
if y < -8500Initial 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 99.1%
neg-mul-199.1%
sub-neg99.1%
Simplified99.1%
Taylor expanded in x around inf 45.5%
mul-1-neg45.5%
distribute-lft-neg-out45.5%
*-commutative45.5%
Simplified45.5%
if -8500 < y < 1.21999999999999994e-14Initial 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 98.4%
if 1.21999999999999994e-14 < 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 99.0%
neg-mul-199.0%
sub-neg99.0%
Simplified99.0%
Final simplification84.9%
(FPCore (x y) :precision binary64 (if (<= x 18000.0) (+ x y) (* x (- y))))
double code(double x, double y) {
double tmp;
if (x <= 18000.0) {
tmp = x + 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 <= 18000.0d0) then
tmp = x + y
else
tmp = x * -y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= 18000.0) {
tmp = x + y;
} else {
tmp = x * -y;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= 18000.0: tmp = x + y else: tmp = x * -y return tmp
function code(x, y) tmp = 0.0 if (x <= 18000.0) tmp = Float64(x + y); else tmp = Float64(x * Float64(-y)); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= 18000.0) tmp = x + y; else tmp = x * -y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, 18000.0], N[(x + y), $MachinePrecision], N[(x * (-y)), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq 18000:\\
\;\;\;\;x + y\\
\mathbf{else}:\\
\;\;\;\;x \cdot \left(-y\right)\\
\end{array}
\end{array}
if x < 18000Initial 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 84.2%
if 18000 < 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 44.3%
neg-mul-144.3%
sub-neg44.3%
Simplified44.3%
Taylor expanded in x around inf 42.7%
mul-1-neg42.7%
distribute-lft-neg-out42.7%
*-commutative42.7%
Simplified42.7%
Final simplification71.9%
(FPCore (x y) :precision binary64 (+ y (* x (- 1.0 y))))
double code(double x, double y) {
return y + (x * (1.0 - y));
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = y + (x * (1.0d0 - y))
end function
public static double code(double x, double y) {
return y + (x * (1.0 - y));
}
def code(x, y): return y + (x * (1.0 - y))
function code(x, y) return Float64(y + Float64(x * Float64(1.0 - y))) end
function tmp = code(x, y) tmp = y + (x * (1.0 - y)); end
code[x_, y_] := N[(y + N[(x * N[(1.0 - y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
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%
(FPCore (x y) :precision binary64 (if (<= x -1.35e-146) x y))
double code(double x, double y) {
double tmp;
if (x <= -1.35e-146) {
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 <= (-1.35d-146)) then
tmp = x
else
tmp = y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -1.35e-146) {
tmp = x;
} else {
tmp = y;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.35e-146: tmp = x else: tmp = y return tmp
function code(x, y) tmp = 0.0 if (x <= -1.35e-146) tmp = x; else tmp = y; end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -1.35e-146) tmp = x; else tmp = y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.35e-146], x, y]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.35 \cdot 10^{-146}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;y\\
\end{array}
\end{array}
if x < -1.34999999999999997e-146Initial 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 67.6%
Taylor expanded in y around 0 43.0%
if -1.34999999999999997e-146 < 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 x around 0 46.8%
(FPCore (x y) :precision binary64 (+ x y))
double code(double x, double y) {
return x + y;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = x + y
end function
public static double code(double x, double y) {
return x + y;
}
def code(x, y): return x + y
function code(x, y) return Float64(x + y) end
function tmp = code(x, y) tmp = x + y; end
code[x_, y_] := N[(x + y), $MachinePrecision]
\begin{array}{l}
\\
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%
(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%
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%
Taylor expanded in y around 0 38.0%
(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%
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 63.7%
neg-mul-163.7%
sub-neg63.7%
Simplified63.7%
Taylor expanded in x around inf 25.9%
mul-1-neg25.9%
distribute-lft-neg-out25.9%
*-commutative25.9%
Simplified25.9%
add-log-exp12.9%
add-sqr-sqrt12.9%
sqrt-unprod12.9%
exp-prod12.9%
add-sqr-sqrt8.0%
sqrt-unprod8.2%
sqr-neg8.2%
sqrt-unprod1.6%
add-sqr-sqrt1.8%
pow-flip1.8%
exp-prod1.6%
rgt-mult-inverse2.6%
metadata-eval2.6%
metadata-eval2.6%
Applied egg-rr2.6%
herbie shell --seed 2024135
(FPCore (x y)
:name "Data.Colour.RGBSpace.HSL:hsl from colour-2.3.3, A"
:precision binary64
(- (+ x y) (* x y)))