
(FPCore (x y z t) :precision binary64 (+ (- (* (/ 1.0 8.0) x) (/ (* y z) 2.0)) t))
double code(double x, double y, double z, double t) {
return (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = (((1.0d0 / 8.0d0) * x) - ((y * z) / 2.0d0)) + t
end function
public static double code(double x, double y, double z, double t) {
return (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t;
}
def code(x, y, z, t): return (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t
function code(x, y, z, t) return Float64(Float64(Float64(Float64(1.0 / 8.0) * x) - Float64(Float64(y * z) / 2.0)) + t) end
function tmp = code(x, y, z, t) tmp = (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t; end
code[x_, y_, z_, t_] := N[(N[(N[(N[(1.0 / 8.0), $MachinePrecision] * x), $MachinePrecision] - N[(N[(y * z), $MachinePrecision] / 2.0), $MachinePrecision]), $MachinePrecision] + t), $MachinePrecision]
\begin{array}{l}
\\
\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 3 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y z t) :precision binary64 (+ (- (* (/ 1.0 8.0) x) (/ (* y z) 2.0)) t))
double code(double x, double y, double z, double t) {
return (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = (((1.0d0 / 8.0d0) * x) - ((y * z) / 2.0d0)) + t
end function
public static double code(double x, double y, double z, double t) {
return (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t;
}
def code(x, y, z, t): return (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t
function code(x, y, z, t) return Float64(Float64(Float64(Float64(1.0 / 8.0) * x) - Float64(Float64(y * z) / 2.0)) + t) end
function tmp = code(x, y, z, t) tmp = (((1.0 / 8.0) * x) - ((y * z) / 2.0)) + t; end
code[x_, y_, z_, t_] := N[(N[(N[(N[(1.0 / 8.0), $MachinePrecision] * x), $MachinePrecision] - N[(N[(y * z), $MachinePrecision] / 2.0), $MachinePrecision]), $MachinePrecision] + t), $MachinePrecision]
\begin{array}{l}
\\
\left(\frac{1}{8} \cdot x - \frac{y \cdot z}{2}\right) + t
\end{array}
(FPCore (x y z t) :precision binary64 (+ (- (* 0.125 x) (* (/ y 2.0) z)) t))
double code(double x, double y, double z, double t) {
return ((0.125 * x) - ((y / 2.0) * z)) + t;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = ((0.125d0 * x) - ((y / 2.0d0) * z)) + t
end function
public static double code(double x, double y, double z, double t) {
return ((0.125 * x) - ((y / 2.0) * z)) + t;
}
def code(x, y, z, t): return ((0.125 * x) - ((y / 2.0) * z)) + t
function code(x, y, z, t) return Float64(Float64(Float64(0.125 * x) - Float64(Float64(y / 2.0) * z)) + t) end
function tmp = code(x, y, z, t) tmp = ((0.125 * x) - ((y / 2.0) * z)) + t; end
code[x_, y_, z_, t_] := N[(N[(N[(0.125 * x), $MachinePrecision] - N[(N[(y / 2.0), $MachinePrecision] * z), $MachinePrecision]), $MachinePrecision] + t), $MachinePrecision]
\begin{array}{l}
\\
\left(0.125 \cdot x - \frac{y}{2} \cdot z\right) + t
\end{array}
Initial program 100.0%
sub-neg100.0%
+-commutative100.0%
neg-sub0100.0%
associate-+l-100.0%
sub-neg100.0%
+-commutative100.0%
associate--r+100.0%
neg-sub0100.0%
distribute-rgt-neg-in100.0%
distribute-rgt-neg-in100.0%
metadata-eval100.0%
remove-double-neg100.0%
associate-*l/100.0%
Simplified100.0%
Final simplification100.0%
(FPCore (x y z t)
:precision binary64
(if (or (<= z -4.8e-70)
(and (not (<= z 410000000.0))
(or (<= z 2.8e+130) (not (<= z 1.75e+161)))))
(+ t (* y (* z -0.5)))
(+ (* 0.125 x) t)))
double code(double x, double y, double z, double t) {
double tmp;
if ((z <= -4.8e-70) || (!(z <= 410000000.0) && ((z <= 2.8e+130) || !(z <= 1.75e+161)))) {
tmp = t + (y * (z * -0.5));
} else {
tmp = (0.125 * x) + t;
}
return tmp;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8) :: tmp
if ((z <= (-4.8d-70)) .or. (.not. (z <= 410000000.0d0)) .and. (z <= 2.8d+130) .or. (.not. (z <= 1.75d+161))) then
tmp = t + (y * (z * (-0.5d0)))
else
tmp = (0.125d0 * x) + t
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if ((z <= -4.8e-70) || (!(z <= 410000000.0) && ((z <= 2.8e+130) || !(z <= 1.75e+161)))) {
tmp = t + (y * (z * -0.5));
} else {
tmp = (0.125 * x) + t;
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if (z <= -4.8e-70) or (not (z <= 410000000.0) and ((z <= 2.8e+130) or not (z <= 1.75e+161))): tmp = t + (y * (z * -0.5)) else: tmp = (0.125 * x) + t return tmp
function code(x, y, z, t) tmp = 0.0 if ((z <= -4.8e-70) || (!(z <= 410000000.0) && ((z <= 2.8e+130) || !(z <= 1.75e+161)))) tmp = Float64(t + Float64(y * Float64(z * -0.5))); else tmp = Float64(Float64(0.125 * x) + t); end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if ((z <= -4.8e-70) || (~((z <= 410000000.0)) && ((z <= 2.8e+130) || ~((z <= 1.75e+161))))) tmp = t + (y * (z * -0.5)); else tmp = (0.125 * x) + t; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Or[LessEqual[z, -4.8e-70], And[N[Not[LessEqual[z, 410000000.0]], $MachinePrecision], Or[LessEqual[z, 2.8e+130], N[Not[LessEqual[z, 1.75e+161]], $MachinePrecision]]]], N[(t + N[(y * N[(z * -0.5), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[(0.125 * x), $MachinePrecision] + t), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;z \leq -4.8 \cdot 10^{-70} \lor \neg \left(z \leq 410000000\right) \land \left(z \leq 2.8 \cdot 10^{+130} \lor \neg \left(z \leq 1.75 \cdot 10^{+161}\right)\right):\\
\;\;\;\;t + y \cdot \left(z \cdot -0.5\right)\\
\mathbf{else}:\\
\;\;\;\;0.125 \cdot x + t\\
\end{array}
\end{array}
if z < -4.8000000000000002e-70 or 4.1e8 < z < 2.7999999999999999e130 or 1.74999999999999994e161 < z Initial program 100.0%
sub-neg100.0%
+-commutative100.0%
neg-sub0100.0%
associate-+l-100.0%
sub-neg100.0%
+-commutative100.0%
associate--r+100.0%
neg-sub0100.0%
distribute-rgt-neg-in100.0%
distribute-rgt-neg-in100.0%
metadata-eval100.0%
remove-double-neg100.0%
associate-*l/100.0%
Simplified100.0%
Taylor expanded in x around 0 80.3%
associate-*r*80.3%
*-commutative80.3%
associate-*r*80.3%
Simplified80.3%
if -4.8000000000000002e-70 < z < 4.1e8 or 2.7999999999999999e130 < z < 1.74999999999999994e161Initial program 100.0%
sub-neg100.0%
+-commutative100.0%
neg-sub0100.0%
associate-+l-100.0%
sub-neg100.0%
+-commutative100.0%
associate--r+100.0%
neg-sub0100.0%
distribute-rgt-neg-in100.0%
distribute-rgt-neg-in100.0%
metadata-eval100.0%
remove-double-neg100.0%
associate-*l/100.0%
Simplified100.0%
Taylor expanded in x around inf 90.2%
Final simplification84.7%
(FPCore (x y z t) :precision binary64 (+ (* 0.125 x) t))
double code(double x, double y, double z, double t) {
return (0.125 * x) + t;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = (0.125d0 * x) + t
end function
public static double code(double x, double y, double z, double t) {
return (0.125 * x) + t;
}
def code(x, y, z, t): return (0.125 * x) + t
function code(x, y, z, t) return Float64(Float64(0.125 * x) + t) end
function tmp = code(x, y, z, t) tmp = (0.125 * x) + t; end
code[x_, y_, z_, t_] := N[(N[(0.125 * x), $MachinePrecision] + t), $MachinePrecision]
\begin{array}{l}
\\
0.125 \cdot x + t
\end{array}
Initial program 100.0%
sub-neg100.0%
+-commutative100.0%
neg-sub0100.0%
associate-+l-100.0%
sub-neg100.0%
+-commutative100.0%
associate--r+100.0%
neg-sub0100.0%
distribute-rgt-neg-in100.0%
distribute-rgt-neg-in100.0%
metadata-eval100.0%
remove-double-neg100.0%
associate-*l/100.0%
Simplified100.0%
Taylor expanded in x around inf 66.2%
Final simplification66.2%
(FPCore (x y z t) :precision binary64 (- (+ (/ x 8.0) t) (* (/ z 2.0) y)))
double code(double x, double y, double z, double t) {
return ((x / 8.0) + t) - ((z / 2.0) * y);
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = ((x / 8.0d0) + t) - ((z / 2.0d0) * y)
end function
public static double code(double x, double y, double z, double t) {
return ((x / 8.0) + t) - ((z / 2.0) * y);
}
def code(x, y, z, t): return ((x / 8.0) + t) - ((z / 2.0) * y)
function code(x, y, z, t) return Float64(Float64(Float64(x / 8.0) + t) - Float64(Float64(z / 2.0) * y)) end
function tmp = code(x, y, z, t) tmp = ((x / 8.0) + t) - ((z / 2.0) * y); end
code[x_, y_, z_, t_] := N[(N[(N[(x / 8.0), $MachinePrecision] + t), $MachinePrecision] - N[(N[(z / 2.0), $MachinePrecision] * y), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\left(\frac{x}{8} + t\right) - \frac{z}{2} \cdot y
\end{array}
herbie shell --seed 2023196
(FPCore (x y z t)
:name "Diagrams.Solve.Polynomial:quartForm from diagrams-solve-0.1, B"
:precision binary64
:herbie-target
(- (+ (/ x 8.0) t) (* (/ z 2.0) y))
(+ (- (* (/ 1.0 8.0) x) (/ (* y z) 2.0)) t))