
(FPCore (x y z t) :precision binary64 (+ (* (+ (* x y) z) y) t))
double code(double x, double y, double z, double t) {
return (((x * y) + z) * y) + 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 = (((x * y) + z) * y) + t
end function
public static double code(double x, double y, double z, double t) {
return (((x * y) + z) * y) + t;
}
def code(x, y, z, t): return (((x * y) + z) * y) + t
function code(x, y, z, t) return Float64(Float64(Float64(Float64(x * y) + z) * y) + t) end
function tmp = code(x, y, z, t) tmp = (((x * y) + z) * y) + t; end
code[x_, y_, z_, t_] := N[(N[(N[(N[(x * y), $MachinePrecision] + z), $MachinePrecision] * y), $MachinePrecision] + t), $MachinePrecision]
\begin{array}{l}
\\
\left(x \cdot y + z\right) \cdot y + t
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 7 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y z t) :precision binary64 (+ (* (+ (* x y) z) y) t))
double code(double x, double y, double z, double t) {
return (((x * y) + z) * y) + 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 = (((x * y) + z) * y) + t
end function
public static double code(double x, double y, double z, double t) {
return (((x * y) + z) * y) + t;
}
def code(x, y, z, t): return (((x * y) + z) * y) + t
function code(x, y, z, t) return Float64(Float64(Float64(Float64(x * y) + z) * y) + t) end
function tmp = code(x, y, z, t) tmp = (((x * y) + z) * y) + t; end
code[x_, y_, z_, t_] := N[(N[(N[(N[(x * y), $MachinePrecision] + z), $MachinePrecision] * y), $MachinePrecision] + t), $MachinePrecision]
\begin{array}{l}
\\
\left(x \cdot y + z\right) \cdot y + t
\end{array}
(FPCore (x y z t) :precision binary64 (fma (fma x y z) y t))
double code(double x, double y, double z, double t) {
return fma(fma(x, y, z), y, t);
}
function code(x, y, z, t) return fma(fma(x, y, z), y, t) end
code[x_, y_, z_, t_] := N[(N[(x * y + z), $MachinePrecision] * y + t), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(\mathsf{fma}\left(x, y, z\right), y, t\right)
\end{array}
(FPCore (x y z t) :precision binary64 (if (or (<= y -240000000000.0) (not (<= y 0.86))) (* y (+ z (* x y))) (+ t (* y z))))
double code(double x, double y, double z, double t) {
double tmp;
if ((y <= -240000000000.0) || !(y <= 0.86)) {
tmp = y * (z + (x * y));
} else {
tmp = t + (y * z);
}
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 ((y <= (-240000000000.0d0)) .or. (.not. (y <= 0.86d0))) then
tmp = y * (z + (x * y))
else
tmp = t + (y * z)
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if ((y <= -240000000000.0) || !(y <= 0.86)) {
tmp = y * (z + (x * y));
} else {
tmp = t + (y * z);
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if (y <= -240000000000.0) or not (y <= 0.86): tmp = y * (z + (x * y)) else: tmp = t + (y * z) return tmp
function code(x, y, z, t) tmp = 0.0 if ((y <= -240000000000.0) || !(y <= 0.86)) tmp = Float64(y * Float64(z + Float64(x * y))); else tmp = Float64(t + Float64(y * z)); end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if ((y <= -240000000000.0) || ~((y <= 0.86))) tmp = y * (z + (x * y)); else tmp = t + (y * z); end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Or[LessEqual[y, -240000000000.0], N[Not[LessEqual[y, 0.86]], $MachinePrecision]], N[(y * N[(z + N[(x * y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(t + N[(y * z), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -240000000000 \lor \neg \left(y \leq 0.86\right):\\
\;\;\;\;y \cdot \left(z + x \cdot y\right)\\
\mathbf{else}:\\
\;\;\;\;t + y \cdot z\\
\end{array}
\end{array}
(FPCore (x y z t) :precision binary64 (if (or (<= y -110.0) (not (<= y 0.92))) (* y (* x y)) t))
double code(double x, double y, double z, double t) {
double tmp;
if ((y <= -110.0) || !(y <= 0.92)) {
tmp = y * (x * y);
} 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 ((y <= (-110.0d0)) .or. (.not. (y <= 0.92d0))) then
tmp = y * (x * y)
else
tmp = t
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if ((y <= -110.0) || !(y <= 0.92)) {
tmp = y * (x * y);
} else {
tmp = t;
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if (y <= -110.0) or not (y <= 0.92): tmp = y * (x * y) else: tmp = t return tmp
function code(x, y, z, t) tmp = 0.0 if ((y <= -110.0) || !(y <= 0.92)) tmp = Float64(y * Float64(x * y)); else tmp = t; end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if ((y <= -110.0) || ~((y <= 0.92))) tmp = y * (x * y); else tmp = t; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Or[LessEqual[y, -110.0], N[Not[LessEqual[y, 0.92]], $MachinePrecision]], N[(y * N[(x * y), $MachinePrecision]), $MachinePrecision], t]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -110 \lor \neg \left(y \leq 0.92\right):\\
\;\;\;\;y \cdot \left(x \cdot y\right)\\
\mathbf{else}:\\
\;\;\;\;t\\
\end{array}
\end{array}
(FPCore (x y z t) :precision binary64 (if (or (<= y -4.6e+160) (not (<= y 1.25e+50))) (* y (* x y)) (+ t (* y z))))
double code(double x, double y, double z, double t) {
double tmp;
if ((y <= -4.6e+160) || !(y <= 1.25e+50)) {
tmp = y * (x * y);
} else {
tmp = t + (y * z);
}
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 ((y <= (-4.6d+160)) .or. (.not. (y <= 1.25d+50))) then
tmp = y * (x * y)
else
tmp = t + (y * z)
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if ((y <= -4.6e+160) || !(y <= 1.25e+50)) {
tmp = y * (x * y);
} else {
tmp = t + (y * z);
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if (y <= -4.6e+160) or not (y <= 1.25e+50): tmp = y * (x * y) else: tmp = t + (y * z) return tmp
function code(x, y, z, t) tmp = 0.0 if ((y <= -4.6e+160) || !(y <= 1.25e+50)) tmp = Float64(y * Float64(x * y)); else tmp = Float64(t + Float64(y * z)); end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if ((y <= -4.6e+160) || ~((y <= 1.25e+50))) tmp = y * (x * y); else tmp = t + (y * z); end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Or[LessEqual[y, -4.6e+160], N[Not[LessEqual[y, 1.25e+50]], $MachinePrecision]], N[(y * N[(x * y), $MachinePrecision]), $MachinePrecision], N[(t + N[(y * z), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -4.6 \cdot 10^{+160} \lor \neg \left(y \leq 1.25 \cdot 10^{+50}\right):\\
\;\;\;\;y \cdot \left(x \cdot y\right)\\
\mathbf{else}:\\
\;\;\;\;t + y \cdot z\\
\end{array}
\end{array}
(FPCore (x y z t) :precision binary64 (+ t (* y (+ z (* x y)))))
double code(double x, double y, double z, double t) {
return t + (y * (z + (x * 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 = t + (y * (z + (x * y)))
end function
public static double code(double x, double y, double z, double t) {
return t + (y * (z + (x * y)));
}
def code(x, y, z, t): return t + (y * (z + (x * y)))
function code(x, y, z, t) return Float64(t + Float64(y * Float64(z + Float64(x * y)))) end
function tmp = code(x, y, z, t) tmp = t + (y * (z + (x * y))); end
code[x_, y_, z_, t_] := N[(t + N[(y * N[(z + N[(x * y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
t + y \cdot \left(z + x \cdot y\right)
\end{array}
(FPCore (x y z t) :precision binary64 (if (or (<= z -2.35e+204) (not (<= z 3.4e+145))) (* y z) t))
double code(double x, double y, double z, double t) {
double tmp;
if ((z <= -2.35e+204) || !(z <= 3.4e+145)) {
tmp = y * z;
} 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 ((z <= (-2.35d+204)) .or. (.not. (z <= 3.4d+145))) then
tmp = y * z
else
tmp = t
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if ((z <= -2.35e+204) || !(z <= 3.4e+145)) {
tmp = y * z;
} else {
tmp = t;
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if (z <= -2.35e+204) or not (z <= 3.4e+145): tmp = y * z else: tmp = t return tmp
function code(x, y, z, t) tmp = 0.0 if ((z <= -2.35e+204) || !(z <= 3.4e+145)) tmp = Float64(y * z); else tmp = t; end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if ((z <= -2.35e+204) || ~((z <= 3.4e+145))) tmp = y * z; else tmp = t; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Or[LessEqual[z, -2.35e+204], N[Not[LessEqual[z, 3.4e+145]], $MachinePrecision]], N[(y * z), $MachinePrecision], t]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;z \leq -2.35 \cdot 10^{+204} \lor \neg \left(z \leq 3.4 \cdot 10^{+145}\right):\\
\;\;\;\;y \cdot z\\
\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}
herbie shell --seed 2023343
(FPCore (x y z t)
:name "Language.Haskell.HsColour.ColourHighlight:unbase from hscolour-1.23"
:precision binary64
(+ (* (+ (* x y) z) y) t))