
(FPCore (x y z) :precision binary64 (- (* (* x 3.0) y) z))
double code(double x, double y, double z) {
return ((x * 3.0) * y) - z;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = ((x * 3.0d0) * y) - z
end function
public static double code(double x, double y, double z) {
return ((x * 3.0) * y) - z;
}
def code(x, y, z): return ((x * 3.0) * y) - z
function code(x, y, z) return Float64(Float64(Float64(x * 3.0) * y) - z) end
function tmp = code(x, y, z) tmp = ((x * 3.0) * y) - z; end
code[x_, y_, z_] := N[(N[(N[(x * 3.0), $MachinePrecision] * y), $MachinePrecision] - z), $MachinePrecision]
\begin{array}{l}
\\
\left(x \cdot 3\right) \cdot y - z
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 5 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y z) :precision binary64 (- (* (* x 3.0) y) z))
double code(double x, double y, double z) {
return ((x * 3.0) * y) - z;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = ((x * 3.0d0) * y) - z
end function
public static double code(double x, double y, double z) {
return ((x * 3.0) * y) - z;
}
def code(x, y, z): return ((x * 3.0) * y) - z
function code(x, y, z) return Float64(Float64(Float64(x * 3.0) * y) - z) end
function tmp = code(x, y, z) tmp = ((x * 3.0) * y) - z; end
code[x_, y_, z_] := N[(N[(N[(x * 3.0), $MachinePrecision] * y), $MachinePrecision] - z), $MachinePrecision]
\begin{array}{l}
\\
\left(x \cdot 3\right) \cdot y - z
\end{array}
(FPCore (x y z) :precision binary64 (- (* (* 3.0 x) y) z))
double code(double x, double y, double z) {
return ((3.0 * x) * y) - z;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = ((3.0d0 * x) * y) - z
end function
public static double code(double x, double y, double z) {
return ((3.0 * x) * y) - z;
}
def code(x, y, z): return ((3.0 * x) * y) - z
function code(x, y, z) return Float64(Float64(Float64(3.0 * x) * y) - z) end
function tmp = code(x, y, z) tmp = ((3.0 * x) * y) - z; end
code[x_, y_, z_] := N[(N[(N[(3.0 * x), $MachinePrecision] * y), $MachinePrecision] - z), $MachinePrecision]
\begin{array}{l}
\\
\left(3 \cdot x\right) \cdot y - z
\end{array}
Initial program 99.9%
Final simplification99.9%
(FPCore (x y z) :precision binary64 (let* ((t_0 (* (* 3.0 x) y))) (if (<= t_0 -5e-41) (* (* y 3.0) x) (if (<= t_0 2e-114) (- z) t_0))))
double code(double x, double y, double z) {
double t_0 = (3.0 * x) * y;
double tmp;
if (t_0 <= -5e-41) {
tmp = (y * 3.0) * x;
} else if (t_0 <= 2e-114) {
tmp = -z;
} else {
tmp = t_0;
}
return tmp;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8) :: t_0
real(8) :: tmp
t_0 = (3.0d0 * x) * y
if (t_0 <= (-5d-41)) then
tmp = (y * 3.0d0) * x
else if (t_0 <= 2d-114) then
tmp = -z
else
tmp = t_0
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double t_0 = (3.0 * x) * y;
double tmp;
if (t_0 <= -5e-41) {
tmp = (y * 3.0) * x;
} else if (t_0 <= 2e-114) {
tmp = -z;
} else {
tmp = t_0;
}
return tmp;
}
def code(x, y, z): t_0 = (3.0 * x) * y tmp = 0 if t_0 <= -5e-41: tmp = (y * 3.0) * x elif t_0 <= 2e-114: tmp = -z else: tmp = t_0 return tmp
function code(x, y, z) t_0 = Float64(Float64(3.0 * x) * y) tmp = 0.0 if (t_0 <= -5e-41) tmp = Float64(Float64(y * 3.0) * x); elseif (t_0 <= 2e-114) tmp = Float64(-z); else tmp = t_0; end return tmp end
function tmp_2 = code(x, y, z) t_0 = (3.0 * x) * y; tmp = 0.0; if (t_0 <= -5e-41) tmp = (y * 3.0) * x; elseif (t_0 <= 2e-114) tmp = -z; else tmp = t_0; end tmp_2 = tmp; end
code[x_, y_, z_] := Block[{t$95$0 = N[(N[(3.0 * x), $MachinePrecision] * y), $MachinePrecision]}, If[LessEqual[t$95$0, -5e-41], N[(N[(y * 3.0), $MachinePrecision] * x), $MachinePrecision], If[LessEqual[t$95$0, 2e-114], (-z), t$95$0]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \left(3 \cdot x\right) \cdot y\\
\mathbf{if}\;t\_0 \leq -5 \cdot 10^{-41}:\\
\;\;\;\;\left(y \cdot 3\right) \cdot x\\
\mathbf{elif}\;t\_0 \leq 2 \cdot 10^{-114}:\\
\;\;\;\;-z\\
\mathbf{else}:\\
\;\;\;\;t\_0\\
\end{array}
\end{array}
if (*.f64 (*.f64 x #s(literal 3 binary64)) y) < -4.9999999999999996e-41Initial program 99.8%
lift--.f64N/A
sub-negN/A
lift-*.f64N/A
lift-*.f64N/A
associate-*l*N/A
*-commutativeN/A
associate-*r*N/A
lower-fma.f64N/A
*-commutativeN/A
lower-*.f64N/A
lower-neg.f6499.7
Applied rewrites99.7%
Taylor expanded in x around inf
*-commutativeN/A
associate-*r*N/A
lower-*.f64N/A
lower-*.f6477.9
Applied rewrites77.9%
if -4.9999999999999996e-41 < (*.f64 (*.f64 x #s(literal 3 binary64)) y) < 2.0000000000000001e-114Initial program 100.0%
Taylor expanded in x around 0
mul-1-negN/A
lower-neg.f6485.7
Applied rewrites85.7%
if 2.0000000000000001e-114 < (*.f64 (*.f64 x #s(literal 3 binary64)) y) Initial program 99.8%
lift--.f64N/A
sub-negN/A
lift-*.f64N/A
lift-*.f64N/A
associate-*l*N/A
*-commutativeN/A
associate-*r*N/A
lower-fma.f64N/A
*-commutativeN/A
lower-*.f64N/A
lower-neg.f6499.7
Applied rewrites99.7%
Taylor expanded in x around inf
*-commutativeN/A
associate-*r*N/A
lower-*.f64N/A
lower-*.f6474.2
Applied rewrites74.2%
Applied rewrites74.4%
Final simplification80.1%
(FPCore (x y z) :precision binary64 (let* ((t_0 (* (* 3.0 x) y))) (if (<= t_0 -5e-41) t_0 (if (<= t_0 2e-114) (- z) t_0))))
double code(double x, double y, double z) {
double t_0 = (3.0 * x) * y;
double tmp;
if (t_0 <= -5e-41) {
tmp = t_0;
} else if (t_0 <= 2e-114) {
tmp = -z;
} else {
tmp = t_0;
}
return tmp;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8) :: t_0
real(8) :: tmp
t_0 = (3.0d0 * x) * y
if (t_0 <= (-5d-41)) then
tmp = t_0
else if (t_0 <= 2d-114) then
tmp = -z
else
tmp = t_0
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double t_0 = (3.0 * x) * y;
double tmp;
if (t_0 <= -5e-41) {
tmp = t_0;
} else if (t_0 <= 2e-114) {
tmp = -z;
} else {
tmp = t_0;
}
return tmp;
}
def code(x, y, z): t_0 = (3.0 * x) * y tmp = 0 if t_0 <= -5e-41: tmp = t_0 elif t_0 <= 2e-114: tmp = -z else: tmp = t_0 return tmp
function code(x, y, z) t_0 = Float64(Float64(3.0 * x) * y) tmp = 0.0 if (t_0 <= -5e-41) tmp = t_0; elseif (t_0 <= 2e-114) tmp = Float64(-z); else tmp = t_0; end return tmp end
function tmp_2 = code(x, y, z) t_0 = (3.0 * x) * y; tmp = 0.0; if (t_0 <= -5e-41) tmp = t_0; elseif (t_0 <= 2e-114) tmp = -z; else tmp = t_0; end tmp_2 = tmp; end
code[x_, y_, z_] := Block[{t$95$0 = N[(N[(3.0 * x), $MachinePrecision] * y), $MachinePrecision]}, If[LessEqual[t$95$0, -5e-41], t$95$0, If[LessEqual[t$95$0, 2e-114], (-z), t$95$0]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \left(3 \cdot x\right) \cdot y\\
\mathbf{if}\;t\_0 \leq -5 \cdot 10^{-41}:\\
\;\;\;\;t\_0\\
\mathbf{elif}\;t\_0 \leq 2 \cdot 10^{-114}:\\
\;\;\;\;-z\\
\mathbf{else}:\\
\;\;\;\;t\_0\\
\end{array}
\end{array}
if (*.f64 (*.f64 x #s(literal 3 binary64)) y) < -4.9999999999999996e-41 or 2.0000000000000001e-114 < (*.f64 (*.f64 x #s(literal 3 binary64)) y) Initial program 99.8%
lift--.f64N/A
sub-negN/A
lift-*.f64N/A
lift-*.f64N/A
associate-*l*N/A
*-commutativeN/A
associate-*r*N/A
lower-fma.f64N/A
*-commutativeN/A
lower-*.f64N/A
lower-neg.f6499.7
Applied rewrites99.7%
Taylor expanded in x around inf
*-commutativeN/A
associate-*r*N/A
lower-*.f64N/A
lower-*.f6476.0
Applied rewrites76.0%
Applied rewrites76.1%
if -4.9999999999999996e-41 < (*.f64 (*.f64 x #s(literal 3 binary64)) y) < 2.0000000000000001e-114Initial program 100.0%
Taylor expanded in x around 0
mul-1-negN/A
lower-neg.f6485.7
Applied rewrites85.7%
Final simplification80.1%
(FPCore (x y z) :precision binary64 (- z))
double code(double x, double y, double z) {
return -z;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = -z
end function
public static double code(double x, double y, double z) {
return -z;
}
def code(x, y, z): return -z
function code(x, y, z) return Float64(-z) end
function tmp = code(x, y, z) tmp = -z; end
code[x_, y_, z_] := (-z)
\begin{array}{l}
\\
-z
\end{array}
Initial program 99.9%
Taylor expanded in x around 0
mul-1-negN/A
lower-neg.f6451.2
Applied rewrites51.2%
(FPCore (x y z) :precision binary64 z)
double code(double x, double y, double z) {
return z;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = z
end function
public static double code(double x, double y, double z) {
return z;
}
def code(x, y, z): return z
function code(x, y, z) return z end
function tmp = code(x, y, z) tmp = z; end
code[x_, y_, z_] := z
\begin{array}{l}
\\
z
\end{array}
Initial program 99.9%
Taylor expanded in x around 0
mul-1-negN/A
lower-neg.f6451.2
Applied rewrites51.2%
Applied rewrites2.4%
(FPCore (x y z) :precision binary64 (- (* x (* 3.0 y)) z))
double code(double x, double y, double z) {
return (x * (3.0 * y)) - z;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = (x * (3.0d0 * y)) - z
end function
public static double code(double x, double y, double z) {
return (x * (3.0 * y)) - z;
}
def code(x, y, z): return (x * (3.0 * y)) - z
function code(x, y, z) return Float64(Float64(x * Float64(3.0 * y)) - z) end
function tmp = code(x, y, z) tmp = (x * (3.0 * y)) - z; end
code[x_, y_, z_] := N[(N[(x * N[(3.0 * y), $MachinePrecision]), $MachinePrecision] - z), $MachinePrecision]
\begin{array}{l}
\\
x \cdot \left(3 \cdot y\right) - z
\end{array}
herbie shell --seed 2024298
(FPCore (x y z)
:name "Diagrams.Solve.Polynomial:cubForm from diagrams-solve-0.1, B"
:precision binary64
:alt
(! :herbie-platform default (- (* x (* 3 y)) z))
(- (* (* x 3.0) y) z))