
(FPCore (x y z) :precision binary64 (+ (+ x y) z))
double code(double x, double y, double z) {
return (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 = (x + y) + z
end function
public static double code(double x, double y, double z) {
return (x + y) + z;
}
def code(x, y, z): return (x + y) + z
function code(x, y, z) return Float64(Float64(x + y) + z) end
function tmp = code(x, y, z) tmp = (x + y) + z; end
code[x_, y_, z_] := N[(N[(x + y), $MachinePrecision] + z), $MachinePrecision]
\begin{array}{l}
\\
\left(x + y\right) + z
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 5 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y z) :precision binary64 (+ (+ x y) z))
double code(double x, double y, double z) {
return (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 = (x + y) + z
end function
public static double code(double x, double y, double z) {
return (x + y) + z;
}
def code(x, y, z): return (x + y) + z
function code(x, y, z) return Float64(Float64(x + y) + z) end
function tmp = code(x, y, z) tmp = (x + y) + z; end
code[x_, y_, z_] := N[(N[(x + y), $MachinePrecision] + z), $MachinePrecision]
\begin{array}{l}
\\
\left(x + y\right) + z
\end{array}
(FPCore (x y z) :precision binary64 (+ (+ y z) x))
double code(double x, double y, double z) {
return (y + z) + x;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = (y + z) + x
end function
public static double code(double x, double y, double z) {
return (y + z) + x;
}
def code(x, y, z): return (y + z) + x
function code(x, y, z) return Float64(Float64(y + z) + x) end
function tmp = code(x, y, z) tmp = (y + z) + x; end
code[x_, y_, z_] := N[(N[(y + z), $MachinePrecision] + x), $MachinePrecision]
\begin{array}{l}
\\
\left(y + z\right) + x
\end{array}
Initial program 100.0%
associate-+l+N/A
+-commutativeN/A
lower-+.f64N/A
lower-+.f64100.0
Applied rewrites100.0%
(FPCore (x y z) :precision binary64 (if (<= (+ z (+ y x)) -1e-119) (+ y x) (+ y z)))
double code(double x, double y, double z) {
double tmp;
if ((z + (y + x)) <= -1e-119) {
tmp = y + x;
} else {
tmp = y + 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 ((z + (y + x)) <= (-1d-119)) then
tmp = y + x
else
tmp = y + z
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double tmp;
if ((z + (y + x)) <= -1e-119) {
tmp = y + x;
} else {
tmp = y + z;
}
return tmp;
}
def code(x, y, z): tmp = 0 if (z + (y + x)) <= -1e-119: tmp = y + x else: tmp = y + z return tmp
function code(x, y, z) tmp = 0.0 if (Float64(z + Float64(y + x)) <= -1e-119) tmp = Float64(y + x); else tmp = Float64(y + z); end return tmp end
function tmp_2 = code(x, y, z) tmp = 0.0; if ((z + (y + x)) <= -1e-119) tmp = y + x; else tmp = y + z; end tmp_2 = tmp; end
code[x_, y_, z_] := If[LessEqual[N[(z + N[(y + x), $MachinePrecision]), $MachinePrecision], -1e-119], N[(y + x), $MachinePrecision], N[(y + z), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;z + \left(y + x\right) \leq -1 \cdot 10^{-119}:\\
\;\;\;\;y + x\\
\mathbf{else}:\\
\;\;\;\;y + z\\
\end{array}
\end{array}
if (+.f64 (+.f64 x y) z) < -1.00000000000000001e-119Initial program 100.0%
Taylor expanded in z around 0
+-commutativeN/A
lower-+.f6468.5
Applied rewrites68.5%
if -1.00000000000000001e-119 < (+.f64 (+.f64 x y) z) Initial program 100.0%
Taylor expanded in x around 0
lower-+.f6473.0
Applied rewrites73.0%
Final simplification70.8%
(FPCore (x y z) :precision binary64 (+ z (+ y x)))
double code(double x, double y, double z) {
return z + (y + x);
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = z + (y + x)
end function
public static double code(double x, double y, double z) {
return z + (y + x);
}
def code(x, y, z): return z + (y + x)
function code(x, y, z) return Float64(z + Float64(y + x)) end
function tmp = code(x, y, z) tmp = z + (y + x); end
code[x_, y_, z_] := N[(z + N[(y + x), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
z + \left(y + x\right)
\end{array}
Initial program 100.0%
Final simplification100.0%
(FPCore (x y z) :precision binary64 (+ z x))
double code(double x, double y, double z) {
return z + x;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = z + x
end function
public static double code(double x, double y, double z) {
return z + x;
}
def code(x, y, z): return z + x
function code(x, y, z) return Float64(z + x) end
function tmp = code(x, y, z) tmp = z + x; end
code[x_, y_, z_] := N[(z + x), $MachinePrecision]
\begin{array}{l}
\\
z + x
\end{array}
Initial program 100.0%
Taylor expanded in y around 0
+-commutativeN/A
lower-+.f6465.7
Applied rewrites65.7%
(FPCore (x y z) :precision binary64 (+ y x))
double code(double x, double y, double z) {
return y + x;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = y + x
end function
public static double code(double x, double y, double z) {
return y + x;
}
def code(x, y, z): return y + x
function code(x, y, z) return Float64(y + x) end
function tmp = code(x, y, z) tmp = y + x; end
code[x_, y_, z_] := N[(y + x), $MachinePrecision]
\begin{array}{l}
\\
y + x
\end{array}
Initial program 100.0%
Taylor expanded in z around 0
+-commutativeN/A
lower-+.f6465.7
Applied rewrites65.7%
herbie shell --seed 2024216
(FPCore (x y z)
:name "Optimisation.CirclePacking:place from circle-packing-0.1.0.4, I"
:precision binary64
(+ (+ x y) z))