
(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 5 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 (/ z 2.0))) t))
double code(double x, double y, double z, double t) {
return ((0.125 * 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 = ((0.125d0 * x) - (y * (z / 2.0d0))) + t
end function
public static double code(double x, double y, double z, double t) {
return ((0.125 * x) - (y * (z / 2.0))) + t;
}
def code(x, y, z, t): return ((0.125 * x) - (y * (z / 2.0))) + t
function code(x, y, z, t) return Float64(Float64(Float64(0.125 * x) - Float64(y * Float64(z / 2.0))) + t) end
function tmp = code(x, y, z, t) tmp = ((0.125 * x) - (y * (z / 2.0))) + t; end
code[x_, y_, z_, t_] := N[(N[(N[(0.125 * x), $MachinePrecision] - N[(y * N[(z / 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + t), $MachinePrecision]
\begin{array}{l}
\\
\left(0.125 \cdot x - y \cdot \frac{z}{2}\right) + t
\end{array}
Initial program 99.7%
associate-+l-99.7%
*-commutative99.7%
associate-+l-99.7%
metadata-eval99.7%
*-commutative99.7%
associate-/l*100.0%
Simplified100.0%
(FPCore (x y z t) :precision binary64 (if (or (<= x -6.2e+177) (not (<= x 1.35e-6))) (+ (* 0.125 x) t) (+ t (* y (* z -0.5)))))
double code(double x, double y, double z, double t) {
double tmp;
if ((x <= -6.2e+177) || !(x <= 1.35e-6)) {
tmp = (0.125 * x) + t;
} else {
tmp = t + (y * (z * -0.5));
}
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 ((x <= (-6.2d+177)) .or. (.not. (x <= 1.35d-6))) then
tmp = (0.125d0 * x) + t
else
tmp = t + (y * (z * (-0.5d0)))
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if ((x <= -6.2e+177) || !(x <= 1.35e-6)) {
tmp = (0.125 * x) + t;
} else {
tmp = t + (y * (z * -0.5));
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if (x <= -6.2e+177) or not (x <= 1.35e-6): tmp = (0.125 * x) + t else: tmp = t + (y * (z * -0.5)) return tmp
function code(x, y, z, t) tmp = 0.0 if ((x <= -6.2e+177) || !(x <= 1.35e-6)) tmp = Float64(Float64(0.125 * x) + t); else tmp = Float64(t + Float64(y * Float64(z * -0.5))); end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if ((x <= -6.2e+177) || ~((x <= 1.35e-6))) tmp = (0.125 * x) + t; else tmp = t + (y * (z * -0.5)); end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Or[LessEqual[x, -6.2e+177], N[Not[LessEqual[x, 1.35e-6]], $MachinePrecision]], N[(N[(0.125 * x), $MachinePrecision] + t), $MachinePrecision], N[(t + N[(y * N[(z * -0.5), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -6.2 \cdot 10^{+177} \lor \neg \left(x \leq 1.35 \cdot 10^{-6}\right):\\
\;\;\;\;0.125 \cdot x + t\\
\mathbf{else}:\\
\;\;\;\;t + y \cdot \left(z \cdot -0.5\right)\\
\end{array}
\end{array}
if x < -6.1999999999999998e177 or 1.34999999999999999e-6 < x Initial program 100.0%
associate-+l-100.0%
*-commutative100.0%
associate-+l-100.0%
metadata-eval100.0%
*-commutative100.0%
associate-/l*100.0%
Simplified100.0%
Taylor expanded in x around inf 83.8%
if -6.1999999999999998e177 < x < 1.34999999999999999e-6Initial program 99.6%
associate-+l-99.6%
*-commutative99.6%
associate-+l-99.6%
metadata-eval99.6%
*-commutative99.6%
associate-/l*100.0%
Simplified100.0%
Taylor expanded in x around 0 86.4%
*-commutative86.4%
associate-*r*86.8%
Simplified86.8%
Final simplification85.9%
(FPCore (x y z t) :precision binary64 (if (<= t -1.36e+19) t (if (<= t 265000000.0) (* 0.125 x) t)))
double code(double x, double y, double z, double t) {
double tmp;
if (t <= -1.36e+19) {
tmp = t;
} else if (t <= 265000000.0) {
tmp = 0.125 * x;
} else {
tmp = 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 (t <= (-1.36d+19)) then
tmp = t
else if (t <= 265000000.0d0) then
tmp = 0.125d0 * x
else
tmp = t
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if (t <= -1.36e+19) {
tmp = t;
} else if (t <= 265000000.0) {
tmp = 0.125 * x;
} else {
tmp = t;
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if t <= -1.36e+19: tmp = t elif t <= 265000000.0: tmp = 0.125 * x else: tmp = t return tmp
function code(x, y, z, t) tmp = 0.0 if (t <= -1.36e+19) tmp = t; elseif (t <= 265000000.0) tmp = Float64(0.125 * x); else tmp = t; end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if (t <= -1.36e+19) tmp = t; elseif (t <= 265000000.0) tmp = 0.125 * x; else tmp = t; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[LessEqual[t, -1.36e+19], t, If[LessEqual[t, 265000000.0], N[(0.125 * x), $MachinePrecision], t]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;t \leq -1.36 \cdot 10^{+19}:\\
\;\;\;\;t\\
\mathbf{elif}\;t \leq 265000000:\\
\;\;\;\;0.125 \cdot x\\
\mathbf{else}:\\
\;\;\;\;t\\
\end{array}
\end{array}
if t < -1.36e19 or 2.65e8 < t Initial program 99.4%
associate-+l-99.4%
*-commutative99.4%
associate-+l-99.4%
metadata-eval99.4%
*-commutative99.4%
associate-/l*100.0%
Simplified100.0%
Taylor expanded in t around inf 59.4%
if -1.36e19 < t < 2.65e8Initial program 100.0%
associate-+l-100.0%
*-commutative100.0%
associate-+l-100.0%
metadata-eval100.0%
*-commutative100.0%
associate-/l*100.0%
Simplified100.0%
Taylor expanded in x around inf 54.6%
Taylor expanded in x around inf 47.5%
(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 99.7%
associate-+l-99.7%
*-commutative99.7%
associate-+l-99.7%
metadata-eval99.7%
*-commutative99.7%
associate-/l*100.0%
Simplified100.0%
Taylor expanded in x around inf 63.5%
(FPCore (x y z t) :precision binary64 t)
double code(double x, double y, double z, double t) {
return 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 = t
end function
public static double code(double x, double y, double z, double t) {
return t;
}
def code(x, y, z, t): return t
function code(x, y, z, t) return t end
function tmp = code(x, y, z, t) tmp = t; end
code[x_, y_, z_, t_] := t
\begin{array}{l}
\\
t
\end{array}
Initial program 99.7%
associate-+l-99.7%
*-commutative99.7%
associate-+l-99.7%
metadata-eval99.7%
*-commutative99.7%
associate-/l*100.0%
Simplified100.0%
Taylor expanded in t around inf 34.4%
(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 2024146
(FPCore (x y z t)
:name "Diagrams.Solve.Polynomial:quartForm from diagrams-solve-0.1, B"
:precision binary64
:alt
(! :herbie-platform default (- (+ (/ x 8) t) (* (/ z 2) y)))
(+ (- (* (/ 1.0 8.0) x) (/ (* y z) 2.0)) t))