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#ifndef __CSC_H__
#define __CSC_H__
#include "csr.h"
/*
* Compute Y += A*X for CSC matrix A and dense vectors X,Y
*
*
* Input Arguments:
* I n_row - number of rows in A
* I n_col - number of columns in A
* I Ap[n_row+1] - column pointer
* I Ai[nnz(A)] - row indices
* T Ax[n_col] - nonzeros
* T Xx[n_col] - input vector
*
* Output Arguments:
* T Yx[n_row] - output vector
*
* Note:
* Output array Yx must be preallocated
*
* Complexity: Linear. Specifically O(nnz(A) + n_col)
*
*/
template <class I, class T>
void csc_matvec(const I n_row,
const I n_col,
const I Ap[],
const I Ai[],
const T Ax[],
const T Xx[],
T Yx[])
{
for(I j = 0; j < n_col; j++){
I col_start = Ap[j];
I col_end = Ap[j+1];
for(I ii = col_start; ii < col_end; ii++){
I i = Ai[ii];
Yx[i] += Ax[ii] * Xx[j];
}
}
}
/*
* Compute Y += A*X for CSC matrix A and dense block vectors X,Y
*
*
* Input Arguments:
* I n_row - number of rows in A
* I n_col - number of columns in A
* I n_vecs - number of column vectors in X and Y
* I Ap[n_row+1] - row pointer
* I Aj[nnz(A)] - column indices
* T Ax[nnz(A)] - nonzeros
* T Xx[n_col,n_vecs] - input vector
*
* Output Arguments:
* T Yx[n_row,n_vecs] - output vector
*
* Note:
* Output array Yx must be preallocated
*
*/
template <class I, class T>
void csc_matvecs(const I n_row,
const I n_col,
const I n_vecs,
const I Ap[],
const I Ai[],
const T Ax[],
const T Xx[],
T Yx[])
{
for(I j = 0; j < n_col; j++){
for(I ii = Ap[j]; ii < Ap[j+1]; ii++){
const I i = Ai[ii];
axpy(n_vecs, Ax[ii], Xx + n_vecs * j, Yx + n_vecs * i);
}
}
}
/*
* Derived methods
*/
template <class I, class T>
void csc_diagonal(const I n_row,
const I n_col,
const I Ap[],
const I Aj[],
const T Ax[],
T Yx[])
{ csr_diagonal(n_col, n_row, Ap, Aj, Ax, Yx); }
template <class I, class T>
void csc_tocsr(const I n_row,
const I n_col,
const I Ap[],
const I Ai[],
const T Ax[],
I Bp[],
I Bj[],
T Bx[])
{ csr_tocsc<I,T>(n_col, n_row, Ap, Ai, Ax, Bp, Bj, Bx); }
template <class I>
void csc_matmat_pass1(const I n_row,
const I n_col,
const I Ap[],
const I Ai[],
const I Bp[],
const I Bi[],
I Cp[])
{ csr_matmat_pass1(n_col, n_row, Bp, Bi, Ap, Ai, Cp); }
template <class I, class T>
void csc_matmat_pass2(const I n_row,
const I n_col,
const I Ap[],
const I Ai[],
const T Ax[],
const I Bp[],
const I Bi[],
const T Bx[],
I Cp[],
I Ci[],
T Cx[])
{ csr_matmat_pass2(n_col, n_row, Bp, Bi, Bx, Ap, Ai, Ax, Cp, Ci, Cx); }
template <class I, class T>
void csc_elmul_csc(const I n_row, const I n_col,
const I Ap[], const I Ai[], const T Ax[],
const I Bp[], const I Bi[], const T Bx[],
I Cp[], I Ci[], T Cx[])
{
csr_elmul_csr(n_col, n_row, Ap, Ai, Ax, Bp, Bi, Bx, Cp, Ci, Cx);
}
template <class I, class T>
void csc_eldiv_csc(const I n_row, const I n_col,
const I Ap[], const I Ai[], const T Ax[],
const I Bp[], const I Bi[], const T Bx[],
I Cp[], I Ci[], T Cx[])
{
csr_eldiv_csr(n_col, n_row, Ap, Ai, Ax, Bp, Bi, Bx, Cp, Ci, Cx);
}
template <class I, class T>
void csc_plus_csc(const I n_row, const I n_col,
const I Ap[], const I Ai[], const T Ax[],
const I Bp[], const I Bi[], const T Bx[],
I Cp[], I Ci[], T Cx[])
{
csr_plus_csr(n_col, n_row, Ap, Ai, Ax, Bp, Bi, Bx, Cp, Ci, Cx);
}
template <class I, class T>
void csc_minus_csc(const I n_row, const I n_col,
const I Ap[], const I Ai[], const T Ax[],
const I Bp[], const I Bi[], const T Bx[],
I Cp[], I Ci[], T Cx[])
{
csr_minus_csr(n_col, n_row, Ap, Ai, Ax, Bp, Bi, Bx, Cp, Ci, Cx);
}
#endif
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