
(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 6 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 (+ (fma z (/ y -2.0) (* 0.125 x)) t))
double code(double x, double y, double z, double t) {
return fma(z, (y / -2.0), (0.125 * x)) + t;
}
function code(x, y, z, t) return Float64(fma(z, Float64(y / -2.0), Float64(0.125 * x)) + t) end
code[x_, y_, z_, t_] := N[(N[(z * N[(y / -2.0), $MachinePrecision] + N[(0.125 * x), $MachinePrecision]), $MachinePrecision] + t), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(z, \frac{y}{-2}, 0.125 \cdot x\right) + t
\end{array}
(FPCore (x y z t)
:precision binary64
(if (or (<= z -2.05e-38)
(not
(or (<= z 1.45e+60) (and (not (<= z 1.06e+82)) (<= z 5.2e+156)))))
(* y (* z -0.5))
(+ (* 0.125 x) t)))
double code(double x, double y, double z, double t) {
double tmp;
if ((z <= -2.05e-38) || !((z <= 1.45e+60) || (!(z <= 1.06e+82) && (z <= 5.2e+156)))) {
tmp = 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 <= (-2.05d-38)) .or. (.not. (z <= 1.45d+60) .or. (.not. (z <= 1.06d+82)) .and. (z <= 5.2d+156))) then
tmp = 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 <= -2.05e-38) || !((z <= 1.45e+60) || (!(z <= 1.06e+82) && (z <= 5.2e+156)))) {
tmp = y * (z * -0.5);
} else {
tmp = (0.125 * x) + t;
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if (z <= -2.05e-38) or not ((z <= 1.45e+60) or (not (z <= 1.06e+82) and (z <= 5.2e+156))): tmp = y * (z * -0.5) else: tmp = (0.125 * x) + t return tmp
function code(x, y, z, t) tmp = 0.0 if ((z <= -2.05e-38) || !((z <= 1.45e+60) || (!(z <= 1.06e+82) && (z <= 5.2e+156)))) tmp = 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 <= -2.05e-38) || ~(((z <= 1.45e+60) || (~((z <= 1.06e+82)) && (z <= 5.2e+156))))) tmp = y * (z * -0.5); else tmp = (0.125 * x) + t; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Or[LessEqual[z, -2.05e-38], N[Not[Or[LessEqual[z, 1.45e+60], And[N[Not[LessEqual[z, 1.06e+82]], $MachinePrecision], LessEqual[z, 5.2e+156]]]], $MachinePrecision]], N[(y * N[(z * -0.5), $MachinePrecision]), $MachinePrecision], N[(N[(0.125 * x), $MachinePrecision] + t), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;z \leq -2.05 \cdot 10^{-38} \lor \neg \left(z \leq 1.45 \cdot 10^{+60} \lor \neg \left(z \leq 1.06 \cdot 10^{+82}\right) \land z \leq 5.2 \cdot 10^{+156}\right):\\
\;\;\;\;y \cdot \left(z \cdot -0.5\right)\\
\mathbf{else}:\\
\;\;\;\;0.125 \cdot x + t\\
\end{array}
\end{array}
(FPCore (x y z t) :precision binary64 (if (or (<= z -3.4e-39) (not (<= z 3.1e+37))) (+ t (* z (* y -0.5))) (+ (* 0.125 x) t)))
double code(double x, double y, double z, double t) {
double tmp;
if ((z <= -3.4e-39) || !(z <= 3.1e+37)) {
tmp = t + (z * (y * -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 <= (-3.4d-39)) .or. (.not. (z <= 3.1d+37))) then
tmp = t + (z * (y * (-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 <= -3.4e-39) || !(z <= 3.1e+37)) {
tmp = t + (z * (y * -0.5));
} else {
tmp = (0.125 * x) + t;
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if (z <= -3.4e-39) or not (z <= 3.1e+37): tmp = t + (z * (y * -0.5)) else: tmp = (0.125 * x) + t return tmp
function code(x, y, z, t) tmp = 0.0 if ((z <= -3.4e-39) || !(z <= 3.1e+37)) tmp = Float64(t + Float64(z * Float64(y * -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 <= -3.4e-39) || ~((z <= 3.1e+37))) tmp = t + (z * (y * -0.5)); else tmp = (0.125 * x) + t; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Or[LessEqual[z, -3.4e-39], N[Not[LessEqual[z, 3.1e+37]], $MachinePrecision]], N[(t + N[(z * N[(y * -0.5), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[(0.125 * x), $MachinePrecision] + t), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;z \leq -3.4 \cdot 10^{-39} \lor \neg \left(z \leq 3.1 \cdot 10^{+37}\right):\\
\;\;\;\;t + z \cdot \left(y \cdot -0.5\right)\\
\mathbf{else}:\\
\;\;\;\;0.125 \cdot x + t\\
\end{array}
\end{array}
(FPCore (x y z t) :precision binary64 (+ t (- (* 0.125 x) (* y (* z 0.5)))))
double code(double x, double y, double z, double t) {
return t + ((0.125 * x) - (y * (z * 0.5)));
}
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 + ((0.125d0 * x) - (y * (z * 0.5d0)))
end function
public static double code(double x, double y, double z, double t) {
return t + ((0.125 * x) - (y * (z * 0.5)));
}
def code(x, y, z, t): return t + ((0.125 * x) - (y * (z * 0.5)))
function code(x, y, z, t) return Float64(t + Float64(Float64(0.125 * x) - Float64(y * Float64(z * 0.5)))) end
function tmp = code(x, y, z, t) tmp = t + ((0.125 * x) - (y * (z * 0.5))); end
code[x_, y_, z_, t_] := N[(t + N[(N[(0.125 * x), $MachinePrecision] - N[(y * N[(z * 0.5), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
t + \left(0.125 \cdot x - y \cdot \left(z \cdot 0.5\right)\right)
\end{array}
(FPCore (x y z t) :precision binary64 (if (<= t -4e+42) t (if (<= t 8.5e+43) (* y (* z -0.5)) t)))
double code(double x, double y, double z, double t) {
double tmp;
if (t <= -4e+42) {
tmp = t;
} else if (t <= 8.5e+43) {
tmp = y * (z * -0.5);
} 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 <= (-4d+42)) then
tmp = t
else if (t <= 8.5d+43) then
tmp = y * (z * (-0.5d0))
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 <= -4e+42) {
tmp = t;
} else if (t <= 8.5e+43) {
tmp = y * (z * -0.5);
} else {
tmp = t;
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if t <= -4e+42: tmp = t elif t <= 8.5e+43: tmp = y * (z * -0.5) else: tmp = t return tmp
function code(x, y, z, t) tmp = 0.0 if (t <= -4e+42) tmp = t; elseif (t <= 8.5e+43) tmp = Float64(y * Float64(z * -0.5)); else tmp = t; end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if (t <= -4e+42) tmp = t; elseif (t <= 8.5e+43) tmp = y * (z * -0.5); else tmp = t; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[LessEqual[t, -4e+42], t, If[LessEqual[t, 8.5e+43], N[(y * N[(z * -0.5), $MachinePrecision]), $MachinePrecision], t]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;t \leq -4 \cdot 10^{+42}:\\
\;\;\;\;t\\
\mathbf{elif}\;t \leq 8.5 \cdot 10^{+43}:\\
\;\;\;\;y \cdot \left(z \cdot -0.5\right)\\
\mathbf{else}:\\
\;\;\;\;t\\
\end{array}
\end{array}
(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}
(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 2024010
(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))