
(FPCore (x y) :precision binary64 (- x (/ y 200.0)))
double code(double x, double y) {
return x - (y / 200.0);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = x - (y / 200.0d0)
end function
public static double code(double x, double y) {
return x - (y / 200.0);
}
def code(x, y): return x - (y / 200.0)
function code(x, y) return Float64(x - Float64(y / 200.0)) end
function tmp = code(x, y) tmp = x - (y / 200.0); end
code[x_, y_] := N[(x - N[(y / 200.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x - \frac{y}{200}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 7 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y) :precision binary64 (- x (/ y 200.0)))
double code(double x, double y) {
return x - (y / 200.0);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = x - (y / 200.0d0)
end function
public static double code(double x, double y) {
return x - (y / 200.0);
}
def code(x, y): return x - (y / 200.0)
function code(x, y) return Float64(x - Float64(y / 200.0)) end
function tmp = code(x, y) tmp = x - (y / 200.0); end
code[x_, y_] := N[(x - N[(y / 200.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x - \frac{y}{200}
\end{array}
(FPCore (x y) :precision binary64 (- x (/ y 200.0)))
double code(double x, double y) {
return x - (y / 200.0);
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = x - (y / 200.0d0)
end function
public static double code(double x, double y) {
return x - (y / 200.0);
}
def code(x, y): return x - (y / 200.0)
function code(x, y) return Float64(x - Float64(y / 200.0)) end
function tmp = code(x, y) tmp = x - (y / 200.0); end
code[x_, y_] := N[(x - N[(y / 200.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x - \frac{y}{200}
\end{array}
Initial program 100.0%
(FPCore (x y) :precision binary64 (if (<= x -1.85e-10) (- x y) (if (<= x 3.5e-19) (* y -0.005) (- x y))))
double code(double x, double y) {
double tmp;
if (x <= -1.85e-10) {
tmp = x - y;
} else if (x <= 3.5e-19) {
tmp = y * -0.005;
} 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 <= (-1.85d-10)) then
tmp = x - y
else if (x <= 3.5d-19) then
tmp = y * (-0.005d0)
else
tmp = x - y
end if
code = tmp
end function
public static double code(double x, double y) {
double tmp;
if (x <= -1.85e-10) {
tmp = x - y;
} else if (x <= 3.5e-19) {
tmp = y * -0.005;
} else {
tmp = x - y;
}
return tmp;
}
def code(x, y): tmp = 0 if x <= -1.85e-10: tmp = x - y elif x <= 3.5e-19: tmp = y * -0.005 else: tmp = x - y return tmp
function code(x, y) tmp = 0.0 if (x <= -1.85e-10) tmp = Float64(x - y); elseif (x <= 3.5e-19) tmp = Float64(y * -0.005); else tmp = Float64(x - y); end return tmp end
function tmp_2 = code(x, y) tmp = 0.0; if (x <= -1.85e-10) tmp = x - y; elseif (x <= 3.5e-19) tmp = y * -0.005; else tmp = x - y; end tmp_2 = tmp; end
code[x_, y_] := If[LessEqual[x, -1.85e-10], N[(x - y), $MachinePrecision], If[LessEqual[x, 3.5e-19], N[(y * -0.005), $MachinePrecision], N[(x - y), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.85 \cdot 10^{-10}:\\
\;\;\;\;x - y\\
\mathbf{elif}\;x \leq 3.5 \cdot 10^{-19}:\\
\;\;\;\;y \cdot -0.005\\
\mathbf{else}:\\
\;\;\;\;x - y\\
\end{array}
\end{array}
if x < -1.85000000000000007e-10 or 3.50000000000000015e-19 < x Initial program 100.0%
Taylor expanded in y around -inf
mul-1-negN/A
lower-neg.f6482.1
Simplified82.1%
lift-neg.f64N/A
remove-double-divN/A
inv-powN/A
metadata-evalN/A
metadata-evalN/A
pow-powN/A
pow2N/A
lift-neg.f64N/A
lift-neg.f64N/A
sqr-negN/A
pow-prod-downN/A
sqr-powN/A
inv-powN/A
remove-double-divN/A
lower--.f6484.1
Applied egg-rr84.1%
if -1.85000000000000007e-10 < x < 3.50000000000000015e-19Initial program 100.0%
Taylor expanded in x around 0
*-commutativeN/A
lower-*.f6474.5
Simplified74.5%
(FPCore (x y) :precision binary64 (fma y -0.005 x))
double code(double x, double y) {
return fma(y, -0.005, x);
}
function code(x, y) return fma(y, -0.005, x) end
code[x_, y_] := N[(y * -0.005 + x), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(y, -0.005, x\right)
\end{array}
Initial program 100.0%
lift-/.f64N/A
sub-negN/A
+-commutativeN/A
lift-/.f64N/A
distribute-neg-frac2N/A
div-invN/A
lower-fma.f64N/A
metadata-evalN/A
metadata-eval99.9
Applied egg-rr99.9%
(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%
Taylor expanded in y around -inf
mul-1-negN/A
lower-neg.f6454.1
Simplified54.1%
lift-neg.f64N/A
remove-double-divN/A
inv-powN/A
metadata-evalN/A
metadata-evalN/A
pow-powN/A
pow2N/A
lift-neg.f64N/A
lift-neg.f64N/A
sqr-negN/A
pow-prod-downN/A
sqr-powN/A
inv-powN/A
remove-double-divN/A
lower--.f6459.8
Applied egg-rr59.8%
(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%
Taylor expanded in y around -inf
mul-1-negN/A
lower-neg.f6454.1
Simplified54.1%
lift-neg.f64N/A
sub-negN/A
lift-neg.f64N/A
remove-double-negN/A
+-commutativeN/A
lower-+.f6454.1
Applied egg-rr54.1%
Final simplification54.1%
(FPCore (x y) :precision binary64 (- y))
double code(double x, double y) {
return -y;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = -y
end function
public static double code(double x, double y) {
return -y;
}
def code(x, y): return -y
function code(x, y) return Float64(-y) end
function tmp = code(x, y) tmp = -y; end
code[x_, y_] := (-y)
\begin{array}{l}
\\
-y
\end{array}
Initial program 100.0%
Taylor expanded in x around 0
*-commutativeN/A
lower-*.f6444.4
Simplified44.4%
Taylor expanded in y around -inf
mul-1-negN/A
lower-neg.f648.3
Simplified8.3%
(FPCore (x y) :precision binary64 y)
double code(double x, double y) {
return y;
}
real(8) function code(x, y)
real(8), intent (in) :: x
real(8), intent (in) :: y
code = y
end function
public static double code(double x, double y) {
return y;
}
def code(x, y): return y
function code(x, y) return y end
function tmp = code(x, y) tmp = y; end
code[x_, y_] := y
\begin{array}{l}
\\
y
\end{array}
Initial program 100.0%
Taylor expanded in x around 0
*-commutativeN/A
lower-*.f6444.4
Simplified44.4%
Taylor expanded in y around -inf
mul-1-negN/A
lower-neg.f648.3
Simplified8.3%
neg-sub0N/A
flip3--N/A
metadata-evalN/A
neg-sub0N/A
cube-negN/A
lift-neg.f64N/A
sqr-powN/A
unpow-prod-downN/A
lift-neg.f64N/A
lift-neg.f64N/A
sqr-negN/A
pow-prod-downN/A
sqr-powN/A
metadata-evalN/A
+-lft-identityN/A
distribute-rgt-outN/A
+-commutativeN/A
+-lft-identityN/A
pow2N/A
pow-divN/A
metadata-evalN/A
unpow12.5
Applied egg-rr2.5%
herbie shell --seed 2024214
(FPCore (x y)
:name "Data.Colour.CIE:cieLAB from colour-2.3.3, D"
:precision binary64
(- x (/ y 200.0)))