
(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 6 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 (fma (* x y) 3.0 (- z)))
double code(double x, double y, double z) {
return fma((x * y), 3.0, -z);
}
function code(x, y, z) return fma(Float64(x * y), 3.0, Float64(-z)) end
code[x_, y_, z_] := N[(N[(x * y), $MachinePrecision] * 3.0 + (-z)), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(x \cdot y, 3, -z\right)
\end{array}
Initial program 99.8%
lift-*.f64N/A
lift-*.f64N/A
sub-negN/A
lift-*.f64N/A
*-commutativeN/A
lift-*.f64N/A
associate-*r*N/A
lower-fma.f64N/A
*-commutativeN/A
lower-*.f64N/A
lower-neg.f6499.9
Applied egg-rr99.9%
(FPCore (x y z) :precision binary64 (let* ((t_0 (* y (* x 3.0)))) (if (<= t_0 -1e-20) t_0 (if (<= t_0 2e-28) (- z) (* x (* y 3.0))))))
double code(double x, double y, double z) {
double t_0 = y * (x * 3.0);
double tmp;
if (t_0 <= -1e-20) {
tmp = t_0;
} else if (t_0 <= 2e-28) {
tmp = -z;
} else {
tmp = x * (y * 3.0);
}
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 = y * (x * 3.0d0)
if (t_0 <= (-1d-20)) then
tmp = t_0
else if (t_0 <= 2d-28) then
tmp = -z
else
tmp = x * (y * 3.0d0)
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double t_0 = y * (x * 3.0);
double tmp;
if (t_0 <= -1e-20) {
tmp = t_0;
} else if (t_0 <= 2e-28) {
tmp = -z;
} else {
tmp = x * (y * 3.0);
}
return tmp;
}
def code(x, y, z): t_0 = y * (x * 3.0) tmp = 0 if t_0 <= -1e-20: tmp = t_0 elif t_0 <= 2e-28: tmp = -z else: tmp = x * (y * 3.0) return tmp
function code(x, y, z) t_0 = Float64(y * Float64(x * 3.0)) tmp = 0.0 if (t_0 <= -1e-20) tmp = t_0; elseif (t_0 <= 2e-28) tmp = Float64(-z); else tmp = Float64(x * Float64(y * 3.0)); end return tmp end
function tmp_2 = code(x, y, z) t_0 = y * (x * 3.0); tmp = 0.0; if (t_0 <= -1e-20) tmp = t_0; elseif (t_0 <= 2e-28) tmp = -z; else tmp = x * (y * 3.0); end tmp_2 = tmp; end
code[x_, y_, z_] := Block[{t$95$0 = N[(y * N[(x * 3.0), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[t$95$0, -1e-20], t$95$0, If[LessEqual[t$95$0, 2e-28], (-z), N[(x * N[(y * 3.0), $MachinePrecision]), $MachinePrecision]]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := y \cdot \left(x \cdot 3\right)\\
\mathbf{if}\;t\_0 \leq -1 \cdot 10^{-20}:\\
\;\;\;\;t\_0\\
\mathbf{elif}\;t\_0 \leq 2 \cdot 10^{-28}:\\
\;\;\;\;-z\\
\mathbf{else}:\\
\;\;\;\;x \cdot \left(y \cdot 3\right)\\
\end{array}
\end{array}
if (*.f64 (*.f64 x #s(literal 3 binary64)) y) < -9.99999999999999945e-21Initial program 99.7%
Taylor expanded in x around inf
*-commutativeN/A
associate-*r*N/A
metadata-evalN/A
distribute-lft-neg-inN/A
*-commutativeN/A
lower-*.f64N/A
distribute-lft-neg-inN/A
metadata-evalN/A
lower-*.f6483.7
Simplified83.7%
associate-*r*N/A
lower-*.f64N/A
lower-*.f6483.7
Applied egg-rr83.7%
if -9.99999999999999945e-21 < (*.f64 (*.f64 x #s(literal 3 binary64)) y) < 1.99999999999999994e-28Initial program 99.9%
Taylor expanded in x around 0
mul-1-negN/A
lower-neg.f6488.0
Simplified88.0%
if 1.99999999999999994e-28 < (*.f64 (*.f64 x #s(literal 3 binary64)) y) Initial program 99.8%
Taylor expanded in x around inf
*-commutativeN/A
associate-*r*N/A
metadata-evalN/A
distribute-lft-neg-inN/A
*-commutativeN/A
lower-*.f64N/A
distribute-lft-neg-inN/A
metadata-evalN/A
lower-*.f6475.5
Simplified75.5%
Final simplification83.0%
(FPCore (x y z) :precision binary64 (let* ((t_0 (* y (* x 3.0))) (t_1 (* x (* y 3.0)))) (if (<= t_0 -1e-20) t_1 (if (<= t_0 2e-28) (- z) t_1))))
double code(double x, double y, double z) {
double t_0 = y * (x * 3.0);
double t_1 = x * (y * 3.0);
double tmp;
if (t_0 <= -1e-20) {
tmp = t_1;
} else if (t_0 <= 2e-28) {
tmp = -z;
} else {
tmp = t_1;
}
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) :: t_1
real(8) :: tmp
t_0 = y * (x * 3.0d0)
t_1 = x * (y * 3.0d0)
if (t_0 <= (-1d-20)) then
tmp = t_1
else if (t_0 <= 2d-28) then
tmp = -z
else
tmp = t_1
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double t_0 = y * (x * 3.0);
double t_1 = x * (y * 3.0);
double tmp;
if (t_0 <= -1e-20) {
tmp = t_1;
} else if (t_0 <= 2e-28) {
tmp = -z;
} else {
tmp = t_1;
}
return tmp;
}
def code(x, y, z): t_0 = y * (x * 3.0) t_1 = x * (y * 3.0) tmp = 0 if t_0 <= -1e-20: tmp = t_1 elif t_0 <= 2e-28: tmp = -z else: tmp = t_1 return tmp
function code(x, y, z) t_0 = Float64(y * Float64(x * 3.0)) t_1 = Float64(x * Float64(y * 3.0)) tmp = 0.0 if (t_0 <= -1e-20) tmp = t_1; elseif (t_0 <= 2e-28) tmp = Float64(-z); else tmp = t_1; end return tmp end
function tmp_2 = code(x, y, z) t_0 = y * (x * 3.0); t_1 = x * (y * 3.0); tmp = 0.0; if (t_0 <= -1e-20) tmp = t_1; elseif (t_0 <= 2e-28) tmp = -z; else tmp = t_1; end tmp_2 = tmp; end
code[x_, y_, z_] := Block[{t$95$0 = N[(y * N[(x * 3.0), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$1 = N[(x * N[(y * 3.0), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[t$95$0, -1e-20], t$95$1, If[LessEqual[t$95$0, 2e-28], (-z), t$95$1]]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := y \cdot \left(x \cdot 3\right)\\
t_1 := x \cdot \left(y \cdot 3\right)\\
\mathbf{if}\;t\_0 \leq -1 \cdot 10^{-20}:\\
\;\;\;\;t\_1\\
\mathbf{elif}\;t\_0 \leq 2 \cdot 10^{-28}:\\
\;\;\;\;-z\\
\mathbf{else}:\\
\;\;\;\;t\_1\\
\end{array}
\end{array}
if (*.f64 (*.f64 x #s(literal 3 binary64)) y) < -9.99999999999999945e-21 or 1.99999999999999994e-28 < (*.f64 (*.f64 x #s(literal 3 binary64)) y) Initial program 99.8%
Taylor expanded in x around inf
*-commutativeN/A
associate-*r*N/A
metadata-evalN/A
distribute-lft-neg-inN/A
*-commutativeN/A
lower-*.f64N/A
distribute-lft-neg-inN/A
metadata-evalN/A
lower-*.f6479.2
Simplified79.2%
if -9.99999999999999945e-21 < (*.f64 (*.f64 x #s(literal 3 binary64)) y) < 1.99999999999999994e-28Initial program 99.9%
Taylor expanded in x around 0
mul-1-negN/A
lower-neg.f6488.0
Simplified88.0%
Final simplification83.0%
(FPCore (x y z) :precision binary64 (- (* y (* x 3.0)) z))
double code(double x, double y, double z) {
return (y * (x * 3.0)) - z;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = (y * (x * 3.0d0)) - z
end function
public static double code(double x, double y, double z) {
return (y * (x * 3.0)) - z;
}
def code(x, y, z): return (y * (x * 3.0)) - z
function code(x, y, z) return Float64(Float64(y * Float64(x * 3.0)) - z) end
function tmp = code(x, y, z) tmp = (y * (x * 3.0)) - z; end
code[x_, y_, z_] := N[(N[(y * N[(x * 3.0), $MachinePrecision]), $MachinePrecision] - z), $MachinePrecision]
\begin{array}{l}
\\
y \cdot \left(x \cdot 3\right) - z
\end{array}
Initial program 99.8%
Final simplification99.8%
(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 99.8%
Taylor expanded in x around 0
mul-1-negN/A
lower-neg.f6449.9
Simplified49.9%
(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 99.8%
Taylor expanded in x around 0
mul-1-negN/A
lower-neg.f6449.9
Simplified49.9%
neg-sub0N/A
flip3--N/A
metadata-evalN/A
neg-sub0N/A
cube-negN/A
lift-neg.f64N/A
sqr-powN/A
pow-prod-downN/A
lift-neg.f64N/A
lift-neg.f64N/A
sqr-negN/A
unpow-prod-downN/A
sqr-powN/A
remove-double-negN/A
lift-neg.f64N/A
neg-mul-1N/A
*-commutativeN/A
unpow-prod-downN/A
metadata-evalN/A
associate-*l/N/A
Applied egg-rr2.5%
(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 2024208
(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))