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* move some compile time "if" to their respective unroller (assign and dot)

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* fix a couple of compilation issues when unrolling is disabled
* reduce default unrolling limit to a more reasonable value
This commit is contained in:
Gael Guennebaud
2008-06-07 01:07:48 +00:00
parent a172385720
commit 6998037930
7 changed files with 145 additions and 133 deletions
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30
Eigen/src/Core/Redux.h
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@@ -63,7 +63,17 @@ template<typename BinaryOp, typename Derived, int Start>
struct ei_redux_unroller<BinaryOp, Derived, Start, Dynamic>
{
typedef typename ei_result_of<BinaryOp(typename Derived::Scalar)>::type Scalar;
static Scalar run(const Derived&, const BinaryOp&) { return Scalar(); }
static Scalar run(const Derived& mat, const BinaryOp& func)
{
Scalar res;
res = mat.coeff(0,0);
for(int i = 1; i < mat.rows(); i++)
res = func(res, mat.coeff(i, 0));
for(int j = 1; j < mat.cols(); j++)
for(int i = 0; i < mat.rows(); i++)
res = func(res, mat.coeff(i, j));
return res;
}
};
/** \returns the result of a full redux operation on the whole matrix or vector using \a func
@@ -81,21 +91,9 @@ MatrixBase<Derived>::redux(const BinaryOp& func) const
const bool unroll = SizeAtCompileTime * CoeffReadCost
+ (SizeAtCompileTime-1) * ei_functor_traits<BinaryOp>::Cost
<= EIGEN_UNROLLING_LIMIT;
if(unroll)
return ei_redux_unroller<BinaryOp, Derived, 0,
unroll ? int(SizeAtCompileTime) : Dynamic>
::run(derived(), func);
else
{
Scalar res;
res = coeff(0,0);
for(int i = 1; i < rows(); i++)
res = func(res, coeff(i, 0));
for(int j = 1; j < cols(); j++)
for(int i = 0; i < rows(); i++)
res = func(res, coeff(i, j));
return res;
}
return ei_redux_unroller<BinaryOp, Derived, 0,
unroll ? int(SizeAtCompileTime) : Dynamic>
::run(derived(), func);
}
/** \returns the sum of all coefficients of *this