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Refactoring codes for numeric updates

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Desire NUENTSA W.
2012-07-27 11:36:58 +02:00
parent 925ace196c
commit c0fa5811ec
6 changed files with 224 additions and 91 deletions
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51
Eigen/src/SparseLU/SparseLU_panel_bmod.h
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@@ -73,12 +73,12 @@ void LU_panel_bmod(const int m, const int w, const int jcol, const int nseg, Sca
IndexVector& xlusup = glu.xlusup;
ScalarVector& lusup = glu.lusup;
int i,ksub,jj,nextl_col,irow;
int ksub,jj,nextl_col;
int fsupc, nsupc, nsupr, nrow;
int krep, kfnz;
int lptr; // points to the row subscripts of a supernode
int luptr; // ...
int segsize,no_zeros,isub ;
int segsize,no_zeros ;
// For each nonz supernode segment of U[*,j] in topological order
int k = nseg - 1;
for (ksub = 0; ksub < nseg; ksub++)
@@ -118,52 +118,7 @@ void LU_panel_bmod(const int m, const int w, const int jcol, const int nseg, Sca
// Perform a trianglar solve and block update,
// then scatter the result of sup-col update to dense[]
no_zeros = kfnz - fsupc;
// First Copy U[*,j] segment from dense[*] to tempv[*] :
// The result of triangular solve is in tempv[*];
// The result of matric-vector update is in dense_col[*]
isub = lptr + no_zeros;
for (i = 0; i < segsize; ++i)
{
irow = lsub(isub);
tempv(i) = dense_col(irow); // Gather to a compact vector
++isub;
}
// Start effective triangle
luptr += nsupr * no_zeros + no_zeros;
// triangular solve with Eigen
Map<Matrix<Scalar,Dynamic, Dynamic>, 0, OuterStride<> > A( &(lusup.data()[luptr]), segsize, segsize, OuterStride<>(nsupr) );
VectorBlock<ScalarVector> u(tempv, 0, segsize);
u = A.template triangularView<UnitLower>().solve(u);
luptr += segsize;
// Dense Matrix vector product y <-- A*x;
new (&A) Map<Matrix<Scalar,Dynamic, Dynamic>, 0, OuterStride<> > ( &(lusup.data()[luptr]), nrow, segsize, OuterStride<>(nsupr) );
VectorBlock<ScalarVector> l(tempv, segsize, nrow);
l= A * u;
// Scatter tempv(*) into SPA dense(*) such that tempv(*)
// can be used for the triangular solve of the next
// column of the panel. The y will be copied into ucol(*)
// after the whole panel has been finished... after column_dfs() and column_bmod()
isub = lptr + no_zeros;
for (i = 0; i < segsize; i++)
{
irow = lsub(isub);
dense_col(irow) = tempv(i);
tempv(i) = Scalar(0.0);
isub++;
}
// Scatter the update from &tempv[segsize] into SPA dense(*)
// Start dense rectangular L
for (i = 0; i < nrow; i++)
{
irow = lsub(isub);
dense_col(irow) -= l(i);
l(i) = Scalar(0);
++isub;
}
LU_kernel_bmod(segsize, dense_col, tempv, lusup, luptr, nsupr, nrow, lsub, lptr, no_zeros);
} // End for each column in the panel
} // End for each updating supernode