
(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*99.9%
Simplified99.9%
Taylor expanded in x around 0 99.9%
(FPCore (x y z) :precision binary64 (if (or (<= x -4.5e+31) (not (<= x 2.6e-74))) (* 3.0 (* x y)) (- z)))
double code(double x, double y, double z) {
double tmp;
if ((x <= -4.5e+31) || !(x <= 2.6e-74)) {
tmp = 3.0 * (x * y);
} else {
tmp = -z;
}
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 ((x <= (-4.5d+31)) .or. (.not. (x <= 2.6d-74))) then
tmp = 3.0d0 * (x * y)
else
tmp = -z
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double tmp;
if ((x <= -4.5e+31) || !(x <= 2.6e-74)) {
tmp = 3.0 * (x * y);
} else {
tmp = -z;
}
return tmp;
}
def code(x, y, z): tmp = 0 if (x <= -4.5e+31) or not (x <= 2.6e-74): tmp = 3.0 * (x * y) else: tmp = -z return tmp
function code(x, y, z) tmp = 0.0 if ((x <= -4.5e+31) || !(x <= 2.6e-74)) tmp = Float64(3.0 * Float64(x * y)); else tmp = Float64(-z); end return tmp end
function tmp_2 = code(x, y, z) tmp = 0.0; if ((x <= -4.5e+31) || ~((x <= 2.6e-74))) tmp = 3.0 * (x * y); else tmp = -z; end tmp_2 = tmp; end
code[x_, y_, z_] := If[Or[LessEqual[x, -4.5e+31], N[Not[LessEqual[x, 2.6e-74]], $MachinePrecision]], N[(3.0 * N[(x * y), $MachinePrecision]), $MachinePrecision], (-z)]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -4.5 \cdot 10^{+31} \lor \neg \left(x \leq 2.6 \cdot 10^{-74}\right):\\
\;\;\;\;3 \cdot \left(x \cdot y\right)\\
\mathbf{else}:\\
\;\;\;\;-z\\
\end{array}
\end{array}
if x < -4.4999999999999996e31 or 2.6000000000000001e-74 < x Initial program 99.8%
associate-*l*99.8%
Simplified99.8%
Taylor expanded in x around 0 99.8%
Taylor expanded in x around inf 65.6%
if -4.4999999999999996e31 < x < 2.6000000000000001e-74Initial program 99.9%
associate-*l*99.9%
Simplified99.9%
Taylor expanded in x around 0 77.9%
neg-mul-177.9%
Simplified77.9%
Final simplification71.2%
(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 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*99.9%
Simplified99.9%
Taylor expanded in x around 0 55.1%
neg-mul-155.1%
Simplified55.1%
(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*99.9%
Simplified99.9%
Taylor expanded in x around 0 55.1%
neg-mul-155.1%
Simplified55.1%
neg-sub055.1%
sub-neg55.1%
add-sqr-sqrt30.7%
sqrt-unprod23.7%
sqr-neg23.7%
sqrt-unprod0.9%
add-sqr-sqrt2.1%
Applied egg-rr2.1%
+-lft-identity2.1%
Simplified2.1%
(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 2024133
(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))