
(FPCore (x y z) :precision binary64 (- (* (* x 3.0) y) z))
double code(double x, double y, double z) {
return ((x * 3.0) * y) - z;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = ((x * 3.0d0) * y) - z
end function
public static double code(double x, double y, double z) {
return ((x * 3.0) * y) - z;
}
def code(x, y, z): return ((x * 3.0) * y) - z
function code(x, y, z) return Float64(Float64(Float64(x * 3.0) * y) - z) end
function tmp = code(x, y, z) tmp = ((x * 3.0) * y) - z; end
code[x_, y_, z_] := N[(N[(N[(x * 3.0), $MachinePrecision] * y), $MachinePrecision] - z), $MachinePrecision]
\begin{array}{l}
\\
\left(x \cdot 3\right) \cdot y - z
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 4 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y z) :precision binary64 (- (* (* x 3.0) y) z))
double code(double x, double y, double z) {
return ((x * 3.0) * y) - z;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = ((x * 3.0d0) * y) - z
end function
public static double code(double x, double y, double z) {
return ((x * 3.0) * y) - z;
}
def code(x, y, z): return ((x * 3.0) * y) - z
function code(x, y, z) return Float64(Float64(Float64(x * 3.0) * y) - z) end
function tmp = code(x, y, z) tmp = ((x * 3.0) * y) - z; end
code[x_, y_, z_] := N[(N[(N[(x * 3.0), $MachinePrecision] * y), $MachinePrecision] - z), $MachinePrecision]
\begin{array}{l}
\\
\left(x \cdot 3\right) \cdot y - z
\end{array}
(FPCore (x y z) :precision binary64 (- (* 3.0 (* x y)) z))
double code(double x, double y, double z) {
return (3.0 * (x * y)) - z;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = (3.0d0 * (x * y)) - z
end function
public static double code(double x, double y, double z) {
return (3.0 * (x * y)) - z;
}
def code(x, y, z): return (3.0 * (x * y)) - z
function code(x, y, z) return Float64(Float64(3.0 * Float64(x * y)) - z) end
function tmp = code(x, y, z) tmp = (3.0 * (x * y)) - z; end
code[x_, y_, z_] := N[(N[(3.0 * N[(x * y), $MachinePrecision]), $MachinePrecision] - z), $MachinePrecision]
\begin{array}{l}
\\
3 \cdot \left(x \cdot y\right) - z
\end{array}
Initial program 99.8%
associate-*l*99.8%
Simplified99.8%
Taylor expanded in x around 0 99.8%
(FPCore (x y z) :precision binary64 (if (or (<= z -4.9e-51) (not (<= z 2.9e+126))) (- z) (* 3.0 (* x y))))
double code(double x, double y, double z) {
double tmp;
if ((z <= -4.9e-51) || !(z <= 2.9e+126)) {
tmp = -z;
} else {
tmp = 3.0 * (x * y);
}
return tmp;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8) :: tmp
if ((z <= (-4.9d-51)) .or. (.not. (z <= 2.9d+126))) then
tmp = -z
else
tmp = 3.0d0 * (x * y)
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double tmp;
if ((z <= -4.9e-51) || !(z <= 2.9e+126)) {
tmp = -z;
} else {
tmp = 3.0 * (x * y);
}
return tmp;
}
def code(x, y, z): tmp = 0 if (z <= -4.9e-51) or not (z <= 2.9e+126): tmp = -z else: tmp = 3.0 * (x * y) return tmp
function code(x, y, z) tmp = 0.0 if ((z <= -4.9e-51) || !(z <= 2.9e+126)) tmp = Float64(-z); else tmp = Float64(3.0 * Float64(x * y)); end return tmp end
function tmp_2 = code(x, y, z) tmp = 0.0; if ((z <= -4.9e-51) || ~((z <= 2.9e+126))) tmp = -z; else tmp = 3.0 * (x * y); end tmp_2 = tmp; end
code[x_, y_, z_] := If[Or[LessEqual[z, -4.9e-51], N[Not[LessEqual[z, 2.9e+126]], $MachinePrecision]], (-z), N[(3.0 * N[(x * y), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;z \leq -4.9 \cdot 10^{-51} \lor \neg \left(z \leq 2.9 \cdot 10^{+126}\right):\\
\;\;\;\;-z\\
\mathbf{else}:\\
\;\;\;\;3 \cdot \left(x \cdot y\right)\\
\end{array}
\end{array}
if z < -4.89999999999999974e-51 or 2.89999999999999986e126 < z Initial program 99.9%
associate-*l*99.9%
Simplified99.9%
Taylor expanded in x around 0 78.4%
neg-mul-178.4%
Simplified78.4%
if -4.89999999999999974e-51 < z < 2.89999999999999986e126Initial program 99.7%
associate-*l*99.8%
Simplified99.8%
Taylor expanded in z around inf 85.2%
Taylor expanded in z around 0 71.7%
Final simplification74.8%
(FPCore (x y z) :precision binary64 (- z))
double code(double x, double y, double z) {
return -z;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = -z
end function
public static double code(double x, double y, double z) {
return -z;
}
def code(x, y, z): return -z
function code(x, y, z) return Float64(-z) end
function tmp = code(x, y, z) tmp = -z; end
code[x_, y_, z_] := (-z)
\begin{array}{l}
\\
-z
\end{array}
Initial program 99.8%
associate-*l*99.8%
Simplified99.8%
Taylor expanded in x around 0 51.2%
neg-mul-151.2%
Simplified51.2%
(FPCore (x y z) :precision binary64 z)
double code(double x, double y, double z) {
return z;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = z
end function
public static double code(double x, double y, double z) {
return z;
}
def code(x, y, z): return z
function code(x, y, z) return z end
function tmp = code(x, y, z) tmp = z; end
code[x_, y_, z_] := z
\begin{array}{l}
\\
z
\end{array}
Initial program 99.8%
associate-*l*99.8%
Simplified99.8%
Taylor expanded in x around 0 51.2%
neg-mul-151.2%
Simplified51.2%
neg-sub051.2%
sub-neg51.2%
add-sqr-sqrt23.3%
sqrt-unprod14.7%
sqr-neg14.7%
sqrt-unprod1.3%
add-sqr-sqrt2.3%
Applied egg-rr2.3%
+-lft-identity2.3%
Simplified2.3%
(FPCore (x y z) :precision binary64 (- (* x (* 3.0 y)) z))
double code(double x, double y, double z) {
return (x * (3.0 * y)) - z;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = (x * (3.0d0 * y)) - z
end function
public static double code(double x, double y, double z) {
return (x * (3.0 * y)) - z;
}
def code(x, y, z): return (x * (3.0 * y)) - z
function code(x, y, z) return Float64(Float64(x * Float64(3.0 * y)) - z) end
function tmp = code(x, y, z) tmp = (x * (3.0 * y)) - z; end
code[x_, y_, z_] := N[(N[(x * N[(3.0 * y), $MachinePrecision]), $MachinePrecision] - z), $MachinePrecision]
\begin{array}{l}
\\
x \cdot \left(3 \cdot y\right) - z
\end{array}
herbie shell --seed 2024182
(FPCore (x y z)
:name "Diagrams.Solve.Polynomial:cubForm from diagrams-solve-0.1, B"
:precision binary64
:alt
(! :herbie-platform default (- (* x (* 3 y)) z))
(- (* (* x 3.0) y) z))