LIS_INT lis_precon_create_sainv_csr(LIS_SOLVER solver, LIS_PRECON precon)
{
LIS_INT err;
LIS_INT i,j,k,ii,jj,len,lfil;
LIS_INT n,nnz,annz,cl,cu,cc,m;
LIS_INT *wu,*wl,*il,*iu,*ic,*pc;
LIS_SCALAR t,v;
LIS_REAL tol,tol_dd,nrm;
LIS_SCALAR *d,*r,*c,*l,*u,*tmp;
LIS_MATRIX A,B;
LIS_MATRIX_ILU W,Z;
LIS_VECTOR D;
LIS_DEBUG_FUNC_IN;
A = solver->A;
n = A->n;
nnz = A->nnz;
tol = solver->params[LIS_PARAMS_DROP-LIS_OPTIONS_LEN];
m = solver->params[LIS_PARAMS_RATE-LIS_OPTIONS_LEN];
annz = 10+A->nnz / A->n;
lfil = (LIS_INT)((double)A->nnz/(2.0*n))*m;
W = NULL;
Z = NULL;
wu = NULL;
wl = NULL;
d = NULL;
l = NULL;
u = NULL;
il = NULL;
iu = NULL;
err = lis_matrix_ilu_create(n,1,&W);
if( err ) return err;
err = lis_matrix_ilu_create(n,1,&Z);
if( err ) return err;
err = lis_matrix_ilu_setCR(W);
if( err ) return err;
err = lis_matrix_ilu_setCR(Z);
if( err ) return err;
err = lis_vector_duplicate(A,&D);
if( err ) return err;
d = D->value;
tmp = (LIS_SCALAR *)lis_malloc(n*sizeof(LIS_SCALAR),"lis_precon_create_sainv_csr::l");
if( tmp==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_SCALAR));
return LIS_OUT_OF_MEMORY;
}
r = (LIS_SCALAR *)lis_malloc(n*sizeof(LIS_SCALAR),"lis_precon_create_sainv_csr::l");
if( r==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_SCALAR));
return LIS_OUT_OF_MEMORY;
}
c = (LIS_SCALAR *)lis_malloc(n*sizeof(LIS_SCALAR),"lis_precon_create_sainv_csr::u");
if( c==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_SCALAR));
return LIS_OUT_OF_MEMORY;
}
l = (LIS_SCALAR *)lis_malloc(n*sizeof(LIS_SCALAR),"lis_precon_create_sainv_csr::l");
if( l==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_SCALAR));
return LIS_OUT_OF_MEMORY;
}
u = (LIS_SCALAR *)lis_malloc(n*sizeof(LIS_SCALAR),"lis_precon_create_sainv_csr::u");
if( u==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_SCALAR));
return LIS_OUT_OF_MEMORY;
}
il = (LIS_INT *)lis_malloc(n*sizeof(LIS_INT),"lis_precon_create_sainv_csr::il");
if( il==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
iu = (LIS_INT *)lis_malloc(n*sizeof(LIS_INT),"lis_precon_create_sainv_csr::iu");
if( iu==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
ic = (LIS_INT *)lis_malloc(n*sizeof(LIS_INT),"lis_precon_create_sainv_csr::iu");
if( ic==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
wu = (LIS_INT *)lis_malloc(n*sizeof(LIS_INT),"lis_precon_create_sainv_csr::ww");
if( wu==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
wl = (LIS_INT *)lis_malloc(n*sizeof(LIS_INT),"lis_precon_create_sainv_csr::ww");
if( wl==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
pc = (LIS_INT *)lis_malloc(n*sizeof(LIS_INT),"lis_precon_create_sainv_csr::iu");
if( pc==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
lis_matrix_sort_csr(A);
err = lis_matrix_duplicate(A,&B);
if( err ) return err;
err = lis_matrix_convert_csr2csc(A,B);
if( err ) return err;
for(i=0;i<n;i++)
{
wu[i] = 0;
wl[i] = 0;
pc[i] = A->ptr[i];
}
for(i=0; i<n; i++)
{
/* nrm_inf(A[i,:]) */
nrm = 0.0;
for(j=A->ptr[i];j<A->ptr[i+1];j++)
{
nrm = _max(nrm,fabs(A->value[j]));
}
tol_dd = nrm * tol;
/* l = e_i */
/* u = e_i */
l[i] = 1.0;
u[i] = 1.0;
il[0] = i;
iu[0] = i;
cl = 1;
cu = 1;
wu[i] = 1;
wl[i] = 1;
cc = 0;
/* r = e_i^T*A */
for(j=A->ptr[i];j<A->ptr[i+1];j++)
{
jj = A->index[j];
r[jj] = A->value[j];
}
/* c = A_i = A*e_i */
for(j=B->ptr[i];j<B->ptr[i+1];j++)
{
jj = B->index[j];
c[jj] = B->value[j];
}
/* W_i = W_i - (r*Z_j/D_jj)*W_j */
for(j=0;j<i;j++)
{
t = 0.0;
for(k=0;k<Z->nnz[j];k++)
{
t += r[Z->index[j][k]]*Z->value[j][k];
}
t = t * d[j];
if( fabs(t) > tol_dd )
{
for(k=0;k<W->nnz[j];k++)
{
v = t * W->value[j][k];
if( fabs(v) > tol_dd )
{
jj = W->index[j][k];
if( wl[jj]==1 )
{
l[jj] -= v;
}
else
{
l[jj] = -v;
il[cl++] = jj;
wl[jj] = 1;
}
}
}
}
}
/* Z_i = Z_i - (W_j^T*c/D_jj)*Z_j */
for(j=0;j<i;j++)
{
t = 0.0;
for(k=0;k<W->nnz[j];k++)
{
t += c[W->index[j][k]]*W->value[j][k];
}
t = t * d[j];
if( fabs(t) > tol_dd )
{
for(k=0;k<Z->nnz[j];k++)
{
v = t * Z->value[j][k];
if( fabs(v) > tol_dd )
{
jj = Z->index[j][k];
if( wu[jj]==1 )
{
u[jj] -= v;
}
else
{
u[jj] = -v;
iu[cu++] = jj;
wu[jj] = 1;
}
}
}
}
}
/*
len = _min(lfil,cl);
for(j=0;j<cl;j++) tmp[j] = fabs(l[il[j]]);
lis_sort_di(0,cl-1,tmp,il);
lis_sort_i(0,len-1,il);
cl = len;
*/
/*
k = cl;
for(j=0;j<cl;j++)
{
if( fabs(l[il[j]])<= tol_dd )
{
wl[il[j]] = 0;
il[j] = n;
k--;
}
}
lis_sort_i(0,cl-1,il);
cl = k;
k = cu;
for(j=0;j<cu;j++)
{
if( fabs(u[iu[j]])<= tol_dd )
{
wu[iu[j]] = 0;
iu[j] = n;
k--;
}
}
lis_sort_i(0,cu-1,iu);
cu = k;
*/
W->nnz[i] = cl;
if( cl > 0 )
{
W->index[i] = (LIS_INT *)malloc(cl*sizeof(LIS_INT));
W->value[i] = (LIS_SCALAR *)malloc(cl*sizeof(LIS_SCALAR));
memcpy(W->index[i],il,cl*sizeof(LIS_INT));
for(j=0;j<cl;j++)
{
W->value[i][j] = l[il[j]];
}
}
Z->nnz[i] = cu;
if( cu > 0 )
{
Z->index[i] = (LIS_INT *)malloc(cu*sizeof(LIS_INT));
Z->value[i] = (LIS_SCALAR *)malloc(cu*sizeof(LIS_SCALAR));
memcpy(Z->index[i],iu,cu*sizeof(LIS_INT));
for(j=0;j<cu;j++)
{
Z->value[i][j] = u[iu[j]];
}
}
for(j=A->ptr[i];j<A->ptr[i+1];j++) r[A->index[j]] = 0.0;
for(j=B->ptr[i];j<B->ptr[i+1];j++) c[B->index[j]] = 0.0;
for(j=0;j<cl;j++)
{
wl[il[j]] = 0;
l[il[j]] = 0.0;
}
for(j=0;j<cu;j++)
{
wu[iu[j]] = 0;
}
/* D_ii = W_i^T * A * Z_i */
cl = 0;
for(k=0;k<Z->nnz[i];k++)
{
ii = Z->index[i][k];
for(j=B->ptr[ii];j<B->ptr[ii+1];j++)
{
jj = B->index[j];
if( wl[jj]==0 )
{
l[jj] = B->value[j]*Z->value[i][k];
wl[jj] = 1;
il[cl++] = jj;
}
else
{
l[jj] += B->value[j]*Z->value[i][k];
}
}
}
t = 0.0;
for(j=0;j<W->nnz[i];j++)
{
k = W->index[i][j];
t += W->value[i][j] * l[k];
}
d[i] = 1.0 / t;
for(j=0;j<cl;j++) wl[il[j]] = 0;
}
lis_matrix_destroy(B);
lis_free2(11,r,c,il,l,wl,iu,u,wu,ic,pc,tmp);
precon->L = W;
precon->U = Z;
precon->D = D;
LIS_DEBUG_FUNC_OUT;
return LIS_SUCCESS;
}
LIS_INT lis_precon_create_ilut_csr(LIS_SOLVER solver, LIS_PRECON precon)
{
#ifdef _OPENMP
LIS_INT err;
LIS_INT i,j,k,ii,jj,kk;
LIS_INT is,ie,my_rank,nprocs;
LIS_INT n,nr,nnz,lfil,len;
LIS_SCALAR gamma,t,tol,toldd,m;
LIS_MATRIX A;
LIS_MATRIX_ILU L,U;
LIS_VECTOR D;
LIS_SCALAR tnorm, tolnorm;
LIS_SCALAR fact,lxu,*wn,*w;
LIS_INT lenu,lenl,col,jpos,jrow,upos,para;
LIS_INT *jbuf,*iw;
LIS_DEBUG_FUNC_IN;
A = solver->A;
n = A->n;
tol = solver->params[LIS_PARAMS_DROP-LIS_OPTIONS_LEN];
m = solver->params[LIS_PARAMS_RATE-LIS_OPTIONS_LEN];
gamma = solver->params[LIS_PARAMS_GAMMA-LIS_OPTIONS_LEN];
lfil = (LIS_INT)((double)A->nnz/(2.0*n))*m;
nprocs = omp_get_max_threads();
L = NULL;
U = NULL;
err = lis_matrix_ilu_create(n,1,&L);
if( err ) return err;
err = lis_matrix_ilu_create(n,1,&U);
if( err ) return err;
err = lis_matrix_ilu_setCR(L);
if( err ) return err;
err = lis_matrix_ilu_setCR(U);
if( err ) return err;
err = lis_vector_duplicate(A,&D);
if( err )
{
return err;
}
w = (LIS_SCALAR *)lis_malloc(nprocs*(n+1)*sizeof(LIS_SCALAR),"lis_precon_create_ilut_csr::w");
if( w==NULL )
{
LIS_SETERR_MEM(nprocs*(n+1)*sizeof(LIS_SCALAR));
return LIS_OUT_OF_MEMORY;
}
wn = (LIS_SCALAR *)lis_malloc(nprocs*n*sizeof(LIS_SCALAR),"lis_precon_create_ilut_csr::w");
if( wn==NULL )
{
LIS_SETERR_MEM(nprocs*n*sizeof(LIS_SCALAR));
return LIS_OUT_OF_MEMORY;
}
jbuf = (LIS_INT *)lis_malloc(nprocs*n*sizeof(LIS_INT),"lis_precon_create_ilut_csr::iw");
if( jbuf==NULL )
{
LIS_SETERR_MEM(nprocs*n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
iw = (LIS_INT *)lis_malloc(nprocs*n*sizeof(LIS_INT),"lis_precon_create_ilut_csr::iw");
if( iw==NULL )
{
LIS_SETERR_MEM(nprocs*n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
#pragma omp parallel private(is,ie,my_rank,i,j,k,jj,tnorm,tolnorm,len,lenu,lenl,col,t,jpos,jrow,fact,lxu,upos)
{
my_rank = omp_get_thread_num();
LIS_GET_ISIE(my_rank,nprocs,n,is,ie);
for(i=is;i<ie;i++) iw[my_rank*n+i] = -1;
for(i=is;i<ie;i++)
{
tnorm = 0;
k = 0;
for(j=A->ptr[i];j<A->ptr[i+1];j++)
{
jj = A->index[j];
if( jj<is || jj>=ie ) continue;
tnorm += fabs(A->value[j]);
k++;
}
tnorm = tnorm / (double)k;
tolnorm = tol * tnorm;
lenu = 0;
lenl = 0;
jbuf[my_rank*n+i] = i;
w[my_rank*n+i] = 0;
iw[my_rank*n+i] = i;
for(j=A->ptr[i];j<A->ptr[i+1];j++)
{
col = A->index[j];
if( col<is || col>=ie ) continue;
t = A->value[j];
if( col < i )
{
jbuf[my_rank*n+lenl] = col;
iw[my_rank*n+col] = lenl;
w[my_rank*n+lenl] = t;
lenl++;
}
else if( col == i )
{
w[my_rank*n+i] = t;
}
else
{
lenu++;
jpos = i + lenu;
jbuf[my_rank*n+jpos] = col;
iw[my_rank*n+col] = jpos;
w[my_rank*n+jpos] = t;
}
}
j = -1;
len = 0;
while( ++j < lenl )
{
jrow = jbuf[my_rank*n+j];
jpos = j;
for(k=j+1;k<lenl;k++)
{
if( jbuf[my_rank*n+k]<jrow )
{
jrow = jbuf[my_rank*n+k];
jpos = k;
}
}
if( jpos!=j )
{
col = jbuf[my_rank*n+j];
jbuf[my_rank*n+j] = jbuf[my_rank*n+jpos];
jbuf[my_rank*n+jpos] = col;
iw[my_rank*n+jrow] = j;
iw[my_rank*n+col] = jpos;
t = w[my_rank*n+j];
w[my_rank*n+j] = w[my_rank*n+jpos];
w[my_rank*n+jpos] = t;
}
fact = w[my_rank*n+j] * D->value[jrow];
w[my_rank*n+j] = fact;
iw[my_rank*n+jrow] = -1;
for(k=0;k<U->nnz[jrow];k++)
{
col = U->index[jrow][k];
jpos = iw[my_rank*n+col];
lxu = -fact * U->value[jrow][k];
if( fabs(lxu) < tolnorm && jpos==-1 ) continue;
if( col >= i )
{
if( jpos == -1 )
{
lenu++;
upos = i + lenu;
jbuf[my_rank*n+upos] = col;
iw[my_rank*n+col] = upos;
w[my_rank*n+upos] = lxu;
}
else
{
w[my_rank*n+jpos] += lxu;
}
}
else
{
if( jpos == -1 )
{
jbuf[my_rank*n+lenl] = col;
iw[my_rank*n+col] = lenl;
w[my_rank*n+lenl] = lxu;
lenl++;
}
else
{
w[my_rank*n+jpos] += lxu;
}
}
}
}
iw[my_rank*n+i] = -1;
for(j=0;j<lenu;j++)
{
iw[ my_rank*n+jbuf[my_rank*n+i+j+1] ] = -1;
}
D->value[i] = 1.0 / w[my_rank*n+i];
len = _min(lfil,lenl);
for(j=0;j<lenl;j++)
{
wn[my_rank*n+j] = fabs(w[my_rank*n+j]);
iw[my_rank*n+j] = j;
}
lis_sort_di(0,lenl-1,&wn[my_rank*n],&iw[my_rank*n]);
lis_sort_i(0,len-1,&iw[my_rank*n]);
L->nnz[i] = len;
if( len>0 )
{
L->index[i] = (LIS_INT *)malloc(len*sizeof(LIS_INT));
L->value[i] = (LIS_SCALAR *)malloc(len*sizeof(LIS_SCALAR));
}
for(j=0;j<len;j++)
{
jpos = iw[my_rank*n+j];
L->index[i][j] = jbuf[my_rank*n+jpos];
L->value[i][j] = w[my_rank*n+jpos];
}
for(j=0;j<lenl;j++) iw[my_rank*n+j] = -1;
len = _min(lfil,lenu);
for(j=0;j<lenu;j++)
{
wn[my_rank*n+j] = fabs(w[my_rank*n+i+j+1]);
iw[my_rank*n+j] = i+j+1;
}
lis_sort_di(0,lenu-1,&wn[my_rank*n],&iw[my_rank*n]);
lis_sort_i(0,len-1,&iw[my_rank*n]);
U->nnz[i] = len;
if( len>0 )
{
U->index[i] = (LIS_INT *)malloc(len*sizeof(LIS_INT));
U->value[i] = (LIS_SCALAR *)malloc(len*sizeof(LIS_SCALAR));
}
for(j=0;j<len;j++)
{
jpos = iw[my_rank*n+j];
U->index[i][j] = jbuf[my_rank*n+jpos];
U->value[i][j] = w[my_rank*n+jpos];
}
for(j=0;j<lenu;j++) iw[my_rank*n+j] = -1;
}
}
precon->L = L;
precon->U = U;
precon->D = D;
lis_free2(4,w,iw,wn,jbuf);
LIS_DEBUG_FUNC_OUT;
return LIS_SUCCESS;
#else
LIS_INT err;
LIS_INT i,j,k;
LIS_INT n,lfil,len;
LIS_SCALAR gamma,t,tol,m;
LIS_MATRIX A;
LIS_MATRIX_ILU L,U;
LIS_VECTOR D;
LIS_SCALAR tnorm, tolnorm;
LIS_SCALAR fact,lxu,*wn,*w;
LIS_INT lenu,lenl,col,jpos,jrow,upos;
LIS_INT *jbuf,*iw;
LIS_DEBUG_FUNC_IN;
A = solver->A;
n = A->n;
tol = solver->params[LIS_PARAMS_DROP-LIS_OPTIONS_LEN];
m = solver->params[LIS_PARAMS_RATE-LIS_OPTIONS_LEN];
gamma = solver->params[LIS_PARAMS_GAMMA-LIS_OPTIONS_LEN];
lfil = (LIS_INT)(((double)A->nnz/(2.0*n))*m);
L = NULL;
U = NULL;
err = lis_matrix_ilu_create(n,1,&L);
if( err ) return err;
err = lis_matrix_ilu_create(n,1,&U);
if( err ) return err;
err = lis_matrix_ilu_setCR(L);
if( err ) return err;
err = lis_matrix_ilu_setCR(U);
if( err ) return err;
err = lis_vector_duplicate(A,&D);
if( err )
{
return err;
}
w = (LIS_SCALAR *)lis_malloc((n+1)*sizeof(LIS_SCALAR),"lis_precon_create_ilut_csr::w");
if( w==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_SCALAR));
return LIS_OUT_OF_MEMORY;
}
wn = (LIS_SCALAR *)lis_malloc(n*sizeof(LIS_SCALAR),"lis_precon_create_ilut_csr::w");
if( wn==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_SCALAR));
return LIS_OUT_OF_MEMORY;
}
jbuf = (LIS_INT *)lis_malloc(n*sizeof(LIS_INT),"lis_precon_create_ilut_csr::iw");
if( jbuf==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
iw = (LIS_INT *)lis_malloc(n*sizeof(LIS_INT),"lis_precon_create_ilut_csr::iw");
if( iw==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
for(i=0;i<n;i++) iw[i] = -1;
for(i=0;i<n;i++)
{
tnorm = 0;
for(j=A->ptr[i];j<A->ptr[i+1];j++)
{
tnorm += fabs(A->value[j]);
}
tnorm = tnorm / (double)(A->ptr[i+1]-A->ptr[i]);
tolnorm = tol * tnorm;
lenu = 0;
lenl = 0;
jbuf[i] = i;
w[i] = 0;
iw[i] = i;
for(j=A->ptr[i];j<A->ptr[i+1];j++)
{
col = A->index[j];
#ifdef USE_MPI
if( col>n-1 ) continue;
#endif
t = A->value[j];
if( col < i )
{
jbuf[lenl] = col;
iw[col] = lenl;
w[lenl] = t;
lenl++;
}
else if( col == i )
{
w[i] = t;
}
else
{
lenu++;
jpos = i + lenu;
jbuf[jpos] = col;
iw[col] = jpos;
w[jpos] = t;
}
}
j = -1;
len = 0;
while( ++j < lenl )
{
jrow = jbuf[j];
jpos = j;
for(k=j+1;k<lenl;k++)
{
if( jbuf[k]<jrow )
{
jrow = jbuf[k];
jpos = k;
}
}
if( jpos!=j )
{
col = jbuf[j];
jbuf[j] = jbuf[jpos];
jbuf[jpos] = col;
iw[jrow] = j;
iw[col] = jpos;
t = w[j];
w[j] = w[jpos];
w[jpos] = t;
}
fact = w[j] * D->value[jrow];
w[j] = fact;
iw[jrow] = -1;
for(k=0;k<U->nnz[jrow];k++)
{
col = U->index[jrow][k];
jpos = iw[col];
lxu = -fact * U->value[jrow][k];
if( fabs(lxu) < tolnorm && jpos==-1 ) continue;
if( col >= i )
{
if( jpos == -1 )
{
lenu++;
upos = i + lenu;
jbuf[upos] = col;
iw[col] = upos;
w[upos] = lxu;
}
else
{
w[jpos] += lxu;
}
}
else
{
if( jpos == -1 )
{
jbuf[lenl] = col;
iw[col] = lenl;
w[lenl] = lxu;
lenl++;
}
else
{
w[jpos] += lxu;
}
}
}
/* for(kk=0;kk<bs;kk++)
{
w[bs*len+kk] = -buf_fact[kk];
}
jbuf[len] = jrow;
len++;*/
}
iw[i] = -1;
for(j=0;j<lenu;j++)
{
iw[ jbuf[i+j+1] ] = -1;
}
D->value[i] = 1.0 / w[i];
len = _min(lfil,lenl);
for(j=0;j<lenl;j++)
{
wn[j] = fabs(w[j]);
iw[j] = j;
}
lis_sort_di(0,lenl-1,wn,iw);
lis_sort_i(0,len-1,iw);
L->nnz[i] = len;
if( len>0 )
{
L->index[i] = (LIS_INT *)malloc(len*sizeof(LIS_INT));
L->value[i] = (LIS_SCALAR *)malloc(len*sizeof(LIS_SCALAR));
}
for(j=0;j<len;j++)
{
jpos = iw[j];
L->index[i][j] = jbuf[jpos];
L->value[i][j] = w[jpos];
}
for(j=0;j<lenl;j++) iw[j] = -1;
len = _min(lfil,lenu);
for(j=0;j<lenu;j++)
{
wn[j] = fabs(w[i+j+1]);
iw[j] = i+j+1;
}
lis_sort_di(0,lenu-1,wn,iw);
lis_sort_i(0,len-1,iw);
U->nnz[i] = len;
if( len>0 )
{
U->index[i] = (LIS_INT *)malloc(len*sizeof(LIS_INT));
U->value[i] = (LIS_SCALAR *)malloc(len*sizeof(LIS_SCALAR));
}
for(j=0;j<len;j++)
{
jpos = iw[j];
U->index[i][j] = jbuf[jpos];
U->value[i][j] = w[jpos];
}
for(j=0;j<lenu;j++) iw[j] = -1;
}
precon->L = L;
precon->U = U;
precon->D = D;
lis_free2(4,w,iw,wn,jbuf);
LIS_DEBUG_FUNC_OUT;
return LIS_SUCCESS;
#endif
}
LIS_INT lis_precon_create_sainv_csr(LIS_SOLVER solver, LIS_PRECON precon)
{
LIS_INT err;
LIS_INT i,j,k,ii,jj,ik,jk;
LIS_INT n,annz,cl,cu;
LIS_INT *ww,*il,*iu;
LIS_SCALAR t,dd;
LIS_REAL tol,nrm;
LIS_SCALAR *d,*l,*u;
LIS_MATRIX A,B;
LIS_MATRIX_ILU W,Z;
LIS_VECTOR D;
LIS_DEBUG_FUNC_IN;
A = solver->A;
n = A->n;
tol = solver->params[LIS_PARAMS_DROP-LIS_OPTIONS_LEN];
annz = A->n / 10;
W = NULL;
ww = NULL;
d = NULL;
l = NULL;
u = NULL;
il = NULL;
iu = NULL;
err = lis_matrix_ilu_create(n,1,&W);
if( err ) return err;
err = lis_matrix_ilu_create(n,1,&Z);
if( err ) return err;
err = lis_matrix_ilu_setCR(W);
if( err ) return err;
err = lis_matrix_ilu_setCR(Z);
if( err ) return err;
err = lis_vector_duplicate(A,&D);
if( err ) return err;
d = D->value;
err = lis_matrix_ilu_premalloc(annz,W);
if( err ) return err;
err = lis_matrix_ilu_premalloc(annz,Z);
if( err ) return err;
l = (LIS_SCALAR *)lis_malloc(n*sizeof(LIS_SCALAR),"lis_precon_create_sainv_csr::l");
if( l==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_SCALAR));
return LIS_OUT_OF_MEMORY;
}
u = (LIS_SCALAR *)lis_malloc(n*sizeof(LIS_SCALAR),"lis_precon_create_sainv_csr::u");
if( u==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_SCALAR));
return LIS_OUT_OF_MEMORY;
}
il = (LIS_INT *)lis_malloc(n*sizeof(LIS_INT),"lis_precon_create_sainv_csr::il");
if( il==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
iu = (LIS_INT *)lis_malloc(n*sizeof(LIS_INT),"lis_precon_create_sainv_csr::iu");
if( iu==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
ww = (LIS_INT *)lis_malloc(n*sizeof(LIS_INT),"lis_precon_create_sainv_csr::ww");
if( ww==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
err = lis_matrix_duplicate(A,&B);
if( err ) return err;
err = lis_matrix_convert_csr2csc(A,B);
if( err )
{
return err;
}
for(i=0;i<n;i++) ww[i] = 0;
for(i=0;i<n;i++)
{
W->value[i][0] = 1.0;
W->index[i][0] = i;
W->nnz[i] = 1;
Z->value[i][0] = 1.0;
Z->index[i][0] = i;
Z->nnz[i] = 1;
}
for(i=0; i<n; i++)
{
/* nrm_inf(A[i,:]) */
nrm = 0.0;
for(j=A->ptr[i];j<A->ptr[i+1];j++)
{
nrm = _max(nrm,fabs(A->value[j]));
}
nrm = 1.0/nrm;
/* l = AZ_i */
cl = 0;
memset(l,0,n*sizeof(LIS_SCALAR));
for(k=0;k<Z->nnz[i];k++)
{
ii = Z->index[i][k];
for(j=B->ptr[ii];j<B->ptr[ii+1];j++)
{
jj = B->index[j];
if( jj>i )
{
l[jj] += B->value[j]*Z->value[i][k];
if( ww[jj]==0 )
{
ww[jj] = 1;
il[cl++] = jj;
}
}
}
}
for(k=0;k<cl;k++) ww[il[k]] = 0;
/* u = W_i'A */
cu = 0;
memset(u,0,n*sizeof(LIS_SCALAR));
for(k=0;k<W->nnz[i];k++)
{
ii = W->index[i][k];
for(j=A->ptr[ii];j<A->ptr[ii+1];j++)
{
jj = A->index[j];
#ifdef USE_MPI
if( jj>n-1 ) continue;
#endif
u[jj] += A->value[j]*W->value[i][k];
if( jj>i && ww[jj]==0 )
{
ww[jj] = 1;
iu[cu++] = jj;
}
}
}
for(k=0;k<cu;k++) ww[iu[k]] = 0;
/* d_ii = uZ_i or W_i'l */
t = 0.0;
for(k=0;k<Z->nnz[i];k++)
{
t += u[Z->index[i][k]]*Z->value[i][k];
}
d[i] = 1.0/t;
/* for j>i, l_j!=0 */
/* w_j = w_j - (l_j/d_ii)*w_i */
for(jj=0;jj<cl;jj++)
{
j = il[jj];
dd = l[j]*d[i];
for(k=0;k<W->nnz[j];k++)
{
ww[W->index[j][k]] = k+1;
}
for(ik=0;ik<W->nnz[i];ik++)
{
jk = ww[W->index[i][ik]];
if( jk!=0 )
{
t = dd*W->value[i][ik];
if( fabs(t)*nrm > tol )
{
W->value[j][jk-1] -= t;
}
}
else
{
t = dd*W->value[i][ik];
if( fabs(t)*nrm > tol )
{
if( W->nnz[j] == W->nnz_ma[j] )
{
W->nnz_ma[j] += annz;
err = lis_matrix_ilu_realloc(j,W->nnz_ma[j],W);
if( err ) return err;
}
jk = W->nnz[j];
W->index[j][jk] = W->index[i][ik];
W->value[j][jk] = -t;
W->nnz[j]++;
}
}
}
for(k=0;k<W->nnz[j];k++)
{
ww[W->index[j][k]] = 0;
}
}
/* for j>i, u_j!=0 */
/* z_j = z_j - (u_j/d_ii)*z_i */
for(jj=0;jj<cu;jj++)
{
j = iu[jj];
dd = u[j]*d[i];
for(k=0;k<Z->nnz[j];k++)
{
ww[Z->index[j][k]] = k+1;
}
for(ik=0;ik<Z->nnz[i];ik++)
{
jk = ww[Z->index[i][ik]];
if( jk!=0 )
{
t = dd*Z->value[i][ik];
if( fabs(t)*nrm > tol )
{
Z->value[j][jk-1] -= t;
}
}
else
{
t = dd*Z->value[i][ik];
if( fabs(t)*nrm > tol )
{
if( Z->nnz[j] == Z->nnz_ma[j] )
{
Z->nnz_ma[j] += annz;
err = lis_matrix_ilu_realloc(j,Z->nnz_ma[j],Z);
if( err ) return err;
}
jk = Z->nnz[j];
Z->index[j][jk] = Z->index[i][ik];
Z->value[j][jk] = -t;
Z->nnz[j]++;
}
}
}
for(k=0;k<Z->nnz[j];k++)
{
ww[Z->index[j][k]] = 0;
}
}
}
lis_matrix_destroy(B);
lis_free2(5,l,u,ww,il,iu);
precon->L = W;
precon->U = Z;
precon->D = D;
LIS_DEBUG_FUNC_OUT;
return LIS_SUCCESS;
}
LIS_INT lis_precon_create_ilut_bsr(LIS_SOLVER solver, LIS_PRECON precon)
{
LIS_INT err;
LIS_INT i,j,k,kk,bnr,bs;
LIS_INT n,nr,annz,lfil,len;
LIS_SCALAR gamma,t,tol,m;
LIS_MATRIX A;
LIS_MATRIX_ILU L,U;
LIS_MATRIX_DIAG D;
LIS_SCALAR tnorm, tolnorm;
LIS_SCALAR buf_ns[16],buf_fact[16],*xnrm,*wn,*w;
LIS_INT lenu,lenl,col,jpos,jrow,upos,para;
LIS_INT *jbuf,*iw;
LIS_DEBUG_FUNC_IN;
A = solver->A;
n = A->n;
nr = A->nr;
bnr = A->bnr;
bs = bnr*bnr;
tol = solver->params[LIS_PARAMS_DROP-LIS_OPTIONS_LEN];
m = solver->params[LIS_PARAMS_RATE-LIS_OPTIONS_LEN];
gamma = solver->params[LIS_PARAMS_GAMMA-LIS_OPTIONS_LEN];
annz = 10+A->bnnz / A->nr;
lfil = (LIS_INT)(((double)A->bnnz/(2.0*nr))*m);
L = NULL;
U = NULL;
err = lis_matrix_ilu_create(nr,bnr,&L);
if( err ) return err;
err = lis_matrix_ilu_create(nr,bnr,&U);
if( err ) return err;
err = lis_matrix_ilu_setCR(L);
if( err ) return err;
err = lis_matrix_ilu_setCR(U);
if( err ) return err;
err = lis_matrix_diag_duplicateM(A,&D);
if( err )
{
return err;
}
w = (LIS_SCALAR *)lis_malloc(bs*(nr+1)*sizeof(LIS_SCALAR),"lis_precon_create_iluc_csr::w");
if( w==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_SCALAR));
return LIS_OUT_OF_MEMORY;
}
xnrm = (LIS_SCALAR *)lis_malloc(nr*sizeof(LIS_SCALAR),"lis_precon_create_iluc_csr::w");
if( xnrm==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_SCALAR));
return LIS_OUT_OF_MEMORY;
}
wn = (LIS_SCALAR *)lis_malloc(nr*sizeof(LIS_SCALAR),"lis_precon_create_iluc_csr::w");
if( wn==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_SCALAR));
return LIS_OUT_OF_MEMORY;
}
jbuf = (LIS_INT *)lis_malloc(n*sizeof(LIS_INT),"lis_precon_create_iluc_csr::iw");
if( jbuf==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
iw = (LIS_INT *)lis_malloc(nr*sizeof(LIS_INT),"lis_precon_create_iluc_csr::iw");
if( iw==NULL )
{
LIS_SETERR_MEM(n*sizeof(LIS_INT));
return LIS_OUT_OF_MEMORY;
}
for(i=0;i<nr;i++) iw[i] = -1;
for(i=0;i<nr;i++)
{
tnorm = 0;
for(j=A->bptr[i];j<A->bptr[i+1];j++)
{
lis_array_nrm2(bs,&A->value[bs*j],&t);
tnorm = _max(t,tnorm);
}
tolnorm = tol * tnorm;
lenu = 1;
lenl = 0;
jbuf[i] = i;
memset(&w[bs*i],0,bs*sizeof(LIS_SCALAR));
iw[i] = i;
for(j=A->bptr[i];j<A->bptr[i+1];j++)
{
col = A->bindex[j];
lis_array_nrm2(bs,&A->value[bs*j],&t);
if( t<tolnorm && col!=i ) continue;
if( col < i )
{
jbuf[lenl] = col;
iw[col] = lenl;
memcpy(&w[bs*lenl],&A->value[bs*j],bs*sizeof(LIS_SCALAR));
lenl++;
}
else if( col == i )
{
memcpy(&w[bs*i],&A->value[bs*j],bs*sizeof(LIS_SCALAR));
}
else
{
jpos = i + lenu;
jbuf[jpos] = col;
iw[col] = jpos;
memcpy(&w[bs*jpos],&A->value[bs*j],bs*sizeof(LIS_SCALAR));
lenu++;
}
}
j = -1;
len = 0;
while( ++j < lenl )
{
jrow = jbuf[j];
jpos = j;
for(k=j+1;k<lenl;k++)
{
if( jbuf[k]<jrow )
{
jrow = jbuf[k];
jpos = k;
}
}
if( jpos!=j )
{
col = jbuf[j];
jbuf[j] = jbuf[jpos];
jbuf[jpos] = col;
iw[jrow] = j;
iw[col] = jpos;
memcpy(buf_ns,&w[bs*j],bs*sizeof(LIS_SCALAR));
memcpy(&w[bs*j],&w[bs*jpos],bs*sizeof(LIS_SCALAR));
memcpy(&w[bs*jpos],buf_ns,bs*sizeof(LIS_SCALAR));
}
/* lis_array_matmat(bnr,&D->value[bs*jrow],&w[bs*j],buf_fact,LIS_INS_VALUE);*/
lis_array_matinv(bnr,&D->value[bs*jrow],&w[bs*j],buf_fact);
iw[jrow] = -1;
lis_array_nrm2(bs,buf_fact,&t);
if( t * xnrm[jrow] <= tolnorm ) continue;
for(k=0;k<U->nnz[jrow];k++)
{
col = U->index[jrow][k];
lis_array_matmat(bnr,buf_fact,&U->value[jrow][bs*k],buf_ns,LIS_INS_VALUE);
jpos = iw[col];
lis_array_nrm2(bs,buf_ns,&t);
if( t < tolnorm && jpos == -1 )
{
continue;
}
if( col >= i )
{
if( jpos == -1 )
{
upos = i + lenu;
jbuf[upos] = col;
iw[col] = upos;
memcpy(&w[bs*upos],buf_ns,bs*sizeof(LIS_SCALAR));
lenu++;
}
else
{
for(kk=0;kk<bs;kk++)
{
w[bs*jpos+kk] += buf_ns[kk];
}
}
}
else
{
if( jpos == -1 )
{
jbuf[lenl] = col;
iw[col] = lenl;
memcpy(&w[bs*lenl],buf_ns,bs*sizeof(LIS_SCALAR));
lenl++;
}
else
{
for(kk=0;kk<bs;kk++)
{
w[bs*jpos+kk] += buf_ns[kk];
}
}
}
}
for(kk=0;kk<bs;kk++)
{
w[bs*len+kk] = -buf_fact[kk];
}
jbuf[len] = jrow;
len++;
}
lenl = len;
len = _min(lfil,lenl);
for(j=0;j<lenl;j++)
{
lis_array_nrm2(bs,&w[bs*j],&wn[j]);
iw[j] = j;
}
lis_sort_di(0,lenl-1,wn,iw);
lis_sort_i(0,len-1,iw);
L->nnz[i] = len;
if( len>0 )
{
L->index[i] = (LIS_INT *)malloc(len*sizeof(LIS_INT));
L->value[i] = (LIS_SCALAR *)malloc(bs*len*sizeof(LIS_SCALAR));
}
for(j=0;j<len;j++)
{
jpos = iw[j];
L->index[i][j] = jbuf[jpos];
memcpy(&L->value[i][bs*j],&w[bs*jpos],bs*sizeof(LIS_SCALAR));
}
for(j=0;j<lenl;j++) iw[j] = -1;
len = _min(lfil,lenu);
for(j=1;j<lenu;j++)
{
jpos = i+j;
lis_array_nrm2(bs,&w[bs*jpos],&wn[j-1]);
iw[j-1] = jpos;
}
para = lenu - 1;
lis_sort_di(0,para-1,wn,iw);
lis_sort_i(0,len-2,iw);
U->nnz[i] = len-1;
if( len>1 )
{
U->index[i] = (LIS_INT *)malloc((len-1)*sizeof(LIS_INT));
U->value[i] = (LIS_SCALAR *)malloc(bs*(len-1)*sizeof(LIS_SCALAR));
}
lis_array_nrm2(bs,&w[bs*i],&t);
for(j=0;j<len-1;j++)
{
jpos = iw[j];
U->index[i][j] = jbuf[jpos];
memcpy(&U->value[i][bs*j],&w[bs*jpos],bs*sizeof(LIS_SCALAR));
t = _max(t,wn[j]);
}
for(j=0;j<lenu-1;j++) iw[j] = -1;
xnrm[i] = t;
memcpy(&D->value[bs*i],&w[bs*i],bs*sizeof(LIS_SCALAR));
if( i==nr-1 )
{
switch(bnr)
{
case 2:
if( n%2!=0 )
{
D->value[4*(nr-1)+3] = 1.0;
}
break;
case 3:
if( n%3==1 )
{
D->value[9*(nr-1)+4] = 1.0;
D->value[9*(nr-1)+8] = 1.0;
}
else if( n%3==2 )
{
D->value[9*(nr-1)+8] = 1.0;
}
break;
}
}
/* lis_array_invGauss(bnr,&D->value[bs*i]);*/
lis_array_LUdecomp(bnr,&D->value[bs*i]);
for(j=0;j<lenu;j++)
{
iw[ jbuf[i+j] ] = -1;
}
}
precon->L = L;
precon->U = U;
precon->WD = D;
lis_free2(5,w,iw,xnrm,wn,jbuf);
LIS_DEBUG_FUNC_OUT;
return LIS_SUCCESS;
}
