
(FPCore (x y z t a) :precision binary64 (/ (- (* x y) (* (* z 9.0) t)) (* a 2.0)))
double code(double x, double y, double z, double t, double a) {
return ((x * y) - ((z * 9.0) * t)) / (a * 2.0);
}
real(8) function code(x, y, z, t, a)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8), intent (in) :: a
code = ((x * y) - ((z * 9.0d0) * t)) / (a * 2.0d0)
end function
public static double code(double x, double y, double z, double t, double a) {
return ((x * y) - ((z * 9.0) * t)) / (a * 2.0);
}
def code(x, y, z, t, a): return ((x * y) - ((z * 9.0) * t)) / (a * 2.0)
function code(x, y, z, t, a) return Float64(Float64(Float64(x * y) - Float64(Float64(z * 9.0) * t)) / Float64(a * 2.0)) end
function tmp = code(x, y, z, t, a) tmp = ((x * y) - ((z * 9.0) * t)) / (a * 2.0); end
code[x_, y_, z_, t_, a_] := N[(N[(N[(x * y), $MachinePrecision] - N[(N[(z * 9.0), $MachinePrecision] * t), $MachinePrecision]), $MachinePrecision] / N[(a * 2.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{x \cdot y - \left(z \cdot 9\right) \cdot t}{a \cdot 2}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 9 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y z t a) :precision binary64 (/ (- (* x y) (* (* z 9.0) t)) (* a 2.0)))
double code(double x, double y, double z, double t, double a) {
return ((x * y) - ((z * 9.0) * t)) / (a * 2.0);
}
real(8) function code(x, y, z, t, a)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8), intent (in) :: a
code = ((x * y) - ((z * 9.0d0) * t)) / (a * 2.0d0)
end function
public static double code(double x, double y, double z, double t, double a) {
return ((x * y) - ((z * 9.0) * t)) / (a * 2.0);
}
def code(x, y, z, t, a): return ((x * y) - ((z * 9.0) * t)) / (a * 2.0)
function code(x, y, z, t, a) return Float64(Float64(Float64(x * y) - Float64(Float64(z * 9.0) * t)) / Float64(a * 2.0)) end
function tmp = code(x, y, z, t, a) tmp = ((x * y) - ((z * 9.0) * t)) / (a * 2.0); end
code[x_, y_, z_, t_, a_] := N[(N[(N[(x * y), $MachinePrecision] - N[(N[(z * 9.0), $MachinePrecision] * t), $MachinePrecision]), $MachinePrecision] / N[(a * 2.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{x \cdot y - \left(z \cdot 9\right) \cdot t}{a \cdot 2}
\end{array}
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
(FPCore (x y z t a)
:precision binary64
(let* ((t_1 (fma (- t) (/ (* z 4.5) a) (* x (/ y (* a 2.0)))))
(t_2 (- (* x y) (* (* z 9.0) t))))
(if (<= t_2 -5e+293) t_1 (if (<= t_2 2e+228) (/ t_2 (* a 2.0)) t_1))))assert(x < y && y < z && z < t && t < a);
assert(x < y && y < z && z < t && t < a);
double code(double x, double y, double z, double t, double a) {
double t_1 = fma(-t, ((z * 4.5) / a), (x * (y / (a * 2.0))));
double t_2 = (x * y) - ((z * 9.0) * t);
double tmp;
if (t_2 <= -5e+293) {
tmp = t_1;
} else if (t_2 <= 2e+228) {
tmp = t_2 / (a * 2.0);
} else {
tmp = t_1;
}
return tmp;
}
x, y, z, t, a = sort([x, y, z, t, a]) x, y, z, t, a = sort([x, y, z, t, a]) function code(x, y, z, t, a) t_1 = fma(Float64(-t), Float64(Float64(z * 4.5) / a), Float64(x * Float64(y / Float64(a * 2.0)))) t_2 = Float64(Float64(x * y) - Float64(Float64(z * 9.0) * t)) tmp = 0.0 if (t_2 <= -5e+293) tmp = t_1; elseif (t_2 <= 2e+228) tmp = Float64(t_2 / Float64(a * 2.0)); else tmp = t_1; end return tmp end
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[((-t) * N[(N[(z * 4.5), $MachinePrecision] / a), $MachinePrecision] + N[(x * N[(y / N[(a * 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$2 = N[(N[(x * y), $MachinePrecision] - N[(N[(z * 9.0), $MachinePrecision] * t), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[t$95$2, -5e+293], t$95$1, If[LessEqual[t$95$2, 2e+228], N[(t$95$2 / N[(a * 2.0), $MachinePrecision]), $MachinePrecision], t$95$1]]]]
\begin{array}{l}
[x, y, z, t, a] = \mathsf{sort}([x, y, z, t, a])\\\\
[x, y, z, t, a] = \mathsf{sort}([x, y, z, t, a])\\
\\
\begin{array}{l}
t_1 := \mathsf{fma}\left(-t, \frac{z \cdot 4.5}{a}, x \cdot \frac{y}{a \cdot 2}\right)\\
t_2 := x \cdot y - \left(z \cdot 9\right) \cdot t\\
\mathbf{if}\;t\_2 \leq -5 \cdot 10^{+293}:\\
\;\;\;\;t\_1\\
\mathbf{elif}\;t\_2 \leq 2 \cdot 10^{+228}:\\
\;\;\;\;\frac{t\_2}{a \cdot 2}\\
\mathbf{else}:\\
\;\;\;\;t\_1\\
\end{array}
\end{array}
if (-.f64 (*.f64 x y) (*.f64 (*.f64 z #s(literal 9 binary64)) t)) < -5.00000000000000033e293 or 1.9999999999999998e228 < (-.f64 (*.f64 x y) (*.f64 (*.f64 z #s(literal 9 binary64)) t)) Initial program 79.0%
lift-/.f64N/A
lift--.f64N/A
div-subN/A
sub-negN/A
+-commutativeN/A
lift-*.f64N/A
*-commutativeN/A
associate-/l*N/A
distribute-lft-neg-inN/A
lower-fma.f64N/A
lower-neg.f64N/A
lift-*.f64N/A
*-commutativeN/A
associate-/r*N/A
lower-/.f64N/A
lift-*.f64N/A
associate-/l*N/A
lower-*.f64N/A
metadata-evalN/A
lift-*.f64N/A
associate-/l*N/A
lower-*.f64N/A
Applied rewrites97.3%
if -5.00000000000000033e293 < (-.f64 (*.f64 x y) (*.f64 (*.f64 z #s(literal 9 binary64)) t)) < 1.9999999999999998e228Initial program 99.1%
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
(FPCore (x y z t a)
:precision binary64
(let* ((t_1 (* (* z 9.0) t)))
(if (<= t_1 -1e+40)
(* t (* -4.5 (/ z a)))
(if (<= t_1 4e+20) (/ (* x y) (* a 2.0)) (* t (/ (* z -4.5) a))))))assert(x < y && y < z && z < t && t < a);
assert(x < y && y < z && z < t && t < a);
double code(double x, double y, double z, double t, double a) {
double t_1 = (z * 9.0) * t;
double tmp;
if (t_1 <= -1e+40) {
tmp = t * (-4.5 * (z / a));
} else if (t_1 <= 4e+20) {
tmp = (x * y) / (a * 2.0);
} else {
tmp = t * ((z * -4.5) / a);
}
return tmp;
}
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
real(8) function code(x, y, z, t, a)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8), intent (in) :: a
real(8) :: t_1
real(8) :: tmp
t_1 = (z * 9.0d0) * t
if (t_1 <= (-1d+40)) then
tmp = t * ((-4.5d0) * (z / a))
else if (t_1 <= 4d+20) then
tmp = (x * y) / (a * 2.0d0)
else
tmp = t * ((z * (-4.5d0)) / a)
end if
code = tmp
end function
assert x < y && y < z && z < t && t < a;
assert x < y && y < z && z < t && t < a;
public static double code(double x, double y, double z, double t, double a) {
double t_1 = (z * 9.0) * t;
double tmp;
if (t_1 <= -1e+40) {
tmp = t * (-4.5 * (z / a));
} else if (t_1 <= 4e+20) {
tmp = (x * y) / (a * 2.0);
} else {
tmp = t * ((z * -4.5) / a);
}
return tmp;
}
[x, y, z, t, a] = sort([x, y, z, t, a]) [x, y, z, t, a] = sort([x, y, z, t, a]) def code(x, y, z, t, a): t_1 = (z * 9.0) * t tmp = 0 if t_1 <= -1e+40: tmp = t * (-4.5 * (z / a)) elif t_1 <= 4e+20: tmp = (x * y) / (a * 2.0) else: tmp = t * ((z * -4.5) / a) return tmp
x, y, z, t, a = sort([x, y, z, t, a]) x, y, z, t, a = sort([x, y, z, t, a]) function code(x, y, z, t, a) t_1 = Float64(Float64(z * 9.0) * t) tmp = 0.0 if (t_1 <= -1e+40) tmp = Float64(t * Float64(-4.5 * Float64(z / a))); elseif (t_1 <= 4e+20) tmp = Float64(Float64(x * y) / Float64(a * 2.0)); else tmp = Float64(t * Float64(Float64(z * -4.5) / a)); end return tmp end
x, y, z, t, a = num2cell(sort([x, y, z, t, a])){:}
x, y, z, t, a = num2cell(sort([x, y, z, t, a])){:}
function tmp_2 = code(x, y, z, t, a)
t_1 = (z * 9.0) * t;
tmp = 0.0;
if (t_1 <= -1e+40)
tmp = t * (-4.5 * (z / a));
elseif (t_1 <= 4e+20)
tmp = (x * y) / (a * 2.0);
else
tmp = t * ((z * -4.5) / a);
end
tmp_2 = tmp;
end
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
NOTE: x, y, z, t, and a should be sorted in increasing order before calling this function.
code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(N[(z * 9.0), $MachinePrecision] * t), $MachinePrecision]}, If[LessEqual[t$95$1, -1e+40], N[(t * N[(-4.5 * N[(z / a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], If[LessEqual[t$95$1, 4e+20], N[(N[(x * y), $MachinePrecision] / N[(a * 2.0), $MachinePrecision]), $MachinePrecision], N[(t * N[(N[(z * -4.5), $MachinePrecision] / a), $MachinePrecision]), $MachinePrecision]]]]
\begin{array}{l}
[x, y, z, t, a] = \mathsf{sort}([x, y, z, t, a])\\\\
[x, y, z, t, a] = \mathsf{sort}([x, y, z, t, a])\\
\\
\begin{array}{l}
t_1 := \left(z \cdot 9\right) \cdot t\\
\mathbf{if}\;t\_1 \leq -1 \cdot 10^{+40}:\\
\;\;\;\;t \cdot \left(-4.5 \cdot \frac{z}{a}\right)\\
\mathbf{elif}\;t\_1 \leq 4 \cdot 10^{+20}:\\
\;\;\;\;\frac{x \cdot y}{a \cdot 2}\\
\mathbf{else}:\\
\;\;\;\;t \cdot \frac{z \cdot -4.5}{a}\\
\end{array}
\end{array}
if (*.f64 (*.f64 z #s(literal 9 binary64)) t) < -1.00000000000000003e40Initial program 85.9%
Taylor expanded in x around 0
lower-*.f64N/A
associate-/l*N/A
lower-*.f64N/A
lower-/.f6477.6
Applied rewrites77.6%
Applied rewrites77.6%
if -1.00000000000000003e40 < (*.f64 (*.f64 z #s(literal 9 binary64)) t) < 4e20Initial program 94.6%
Taylor expanded in x around inf
lower-*.f6472.9
Applied rewrites72.9%
if 4e20 < (*.f64 (*.f64 z #s(literal 9 binary64)) t) Initial program 87.6%
Taylor expanded in x around 0
lower-*.f64N/A
associate-/l*N/A
lower-*.f64N/A
lower-/.f6476.4
Applied rewrites76.4%
Applied rewrites76.3%
Final simplification74.7%
(FPCore (x y z t a)
:precision binary64
(if (< a -2.090464557976709e+86)
(- (* 0.5 (/ (* y x) a)) (* 4.5 (/ t (/ a z))))
(if (< a 2.144030707833976e+99)
(/ (- (* x y) (* z (* 9.0 t))) (* a 2.0))
(- (* (/ y a) (* x 0.5)) (* (/ t a) (* z 4.5))))))
double code(double x, double y, double z, double t, double a) {
double tmp;
if (a < -2.090464557976709e+86) {
tmp = (0.5 * ((y * x) / a)) - (4.5 * (t / (a / z)));
} else if (a < 2.144030707833976e+99) {
tmp = ((x * y) - (z * (9.0 * t))) / (a * 2.0);
} else {
tmp = ((y / a) * (x * 0.5)) - ((t / a) * (z * 4.5));
}
return tmp;
}
real(8) function code(x, y, z, t, a)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8), intent (in) :: a
real(8) :: tmp
if (a < (-2.090464557976709d+86)) then
tmp = (0.5d0 * ((y * x) / a)) - (4.5d0 * (t / (a / z)))
else if (a < 2.144030707833976d+99) then
tmp = ((x * y) - (z * (9.0d0 * t))) / (a * 2.0d0)
else
tmp = ((y / a) * (x * 0.5d0)) - ((t / a) * (z * 4.5d0))
end if
code = tmp
end function
public static double code(double x, double y, double z, double t, double a) {
double tmp;
if (a < -2.090464557976709e+86) {
tmp = (0.5 * ((y * x) / a)) - (4.5 * (t / (a / z)));
} else if (a < 2.144030707833976e+99) {
tmp = ((x * y) - (z * (9.0 * t))) / (a * 2.0);
} else {
tmp = ((y / a) * (x * 0.5)) - ((t / a) * (z * 4.5));
}
return tmp;
}
def code(x, y, z, t, a): tmp = 0 if a < -2.090464557976709e+86: tmp = (0.5 * ((y * x) / a)) - (4.5 * (t / (a / z))) elif a < 2.144030707833976e+99: tmp = ((x * y) - (z * (9.0 * t))) / (a * 2.0) else: tmp = ((y / a) * (x * 0.5)) - ((t / a) * (z * 4.5)) return tmp
function code(x, y, z, t, a) tmp = 0.0 if (a < -2.090464557976709e+86) tmp = Float64(Float64(0.5 * Float64(Float64(y * x) / a)) - Float64(4.5 * Float64(t / Float64(a / z)))); elseif (a < 2.144030707833976e+99) tmp = Float64(Float64(Float64(x * y) - Float64(z * Float64(9.0 * t))) / Float64(a * 2.0)); else tmp = Float64(Float64(Float64(y / a) * Float64(x * 0.5)) - Float64(Float64(t / a) * Float64(z * 4.5))); end return tmp end
function tmp_2 = code(x, y, z, t, a) tmp = 0.0; if (a < -2.090464557976709e+86) tmp = (0.5 * ((y * x) / a)) - (4.5 * (t / (a / z))); elseif (a < 2.144030707833976e+99) tmp = ((x * y) - (z * (9.0 * t))) / (a * 2.0); else tmp = ((y / a) * (x * 0.5)) - ((t / a) * (z * 4.5)); end tmp_2 = tmp; end
code[x_, y_, z_, t_, a_] := If[Less[a, -2.090464557976709e+86], N[(N[(0.5 * N[(N[(y * x), $MachinePrecision] / a), $MachinePrecision]), $MachinePrecision] - N[(4.5 * N[(t / N[(a / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], If[Less[a, 2.144030707833976e+99], N[(N[(N[(x * y), $MachinePrecision] - N[(z * N[(9.0 * t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / N[(a * 2.0), $MachinePrecision]), $MachinePrecision], N[(N[(N[(y / a), $MachinePrecision] * N[(x * 0.5), $MachinePrecision]), $MachinePrecision] - N[(N[(t / a), $MachinePrecision] * N[(z * 4.5), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a < -2.090464557976709 \cdot 10^{+86}:\\
\;\;\;\;0.5 \cdot \frac{y \cdot x}{a} - 4.5 \cdot \frac{t}{\frac{a}{z}}\\
\mathbf{elif}\;a < 2.144030707833976 \cdot 10^{+99}:\\
\;\;\;\;\frac{x \cdot y - z \cdot \left(9 \cdot t\right)}{a \cdot 2}\\
\mathbf{else}:\\
\;\;\;\;\frac{y}{a} \cdot \left(x \cdot 0.5\right) - \frac{t}{a} \cdot \left(z \cdot 4.5\right)\\
\end{array}
\end{array}
herbie shell --seed 2024223
(FPCore (x y z t a)
:name "Diagrams.Solve.Polynomial:cubForm from diagrams-solve-0.1, I"
:precision binary64
:alt
(! :herbie-platform default (if (< a -209046455797670900000000000000000000000000000000000000000000000000000000000000000000000) (- (* 1/2 (/ (* y x) a)) (* 9/2 (/ t (/ a z)))) (if (< a 2144030707833976000000000000000000000000000000000000000000000000000000000000000000000000000000000000) (/ (- (* x y) (* z (* 9 t))) (* a 2)) (- (* (/ y a) (* x 1/2)) (* (/ t a) (* z 9/2))))))
(/ (- (* x y) (* (* z 9.0) t)) (* a 2.0)))