inline void
MakeTriangular( UpperOrLower uplo, DistMatrix<T,U,V>& A )
{
#ifndef RELEASE
PushCallStack("MakeTriangular");
#endif
const int height = A.Height();
const int localHeight = A.LocalHeight();
const int localWidth = A.LocalWidth();
const int colShift = A.ColShift();
const int rowShift = A.RowShift();
const int colStride = A.ColStride();
const int rowStride = A.RowStride();
T* localBuffer = A.LocalBuffer();
const int ldim = A.LocalLDim();
if( uplo == LOWER )
{
#ifdef HAVE_OPENMP
#pragma omp parallel for
#endif
for( int jLocal=0; jLocal<localWidth; ++jLocal )
{
const int j = rowShift + jLocal*rowStride;
const int lastZeroRow = j-1;
if( lastZeroRow >= 0 )
{
const int boundary = std::min( lastZeroRow+1, height );
const int numZeroRows =
RawLocalLength( boundary, colShift, colStride );
MemZero( &localBuffer[jLocal*ldim], numZeroRows );
}
}
}
else
{
#ifdef HAVE_OPENMP
#pragma omp parallel for
#endif
for( int jLocal=0; jLocal<localWidth; ++jLocal )
{
const int j = rowShift + jLocal*rowStride;
const int firstZeroRow = j+1;
const int numNonzeroRows =
RawLocalLength(firstZeroRow,colShift,colStride);
if( numNonzeroRows < localHeight )
{
T* col = &localBuffer[numNonzeroRows+jLocal*ldim];
MemZero( col, localHeight-numNonzeroRows );
}
}
}
#ifndef RELEASE
PopCallStack();
#endif
}
inline void
MakeTrapezoidal
( LeftOrRight side, UpperOrLower uplo, int offset,
DistMatrix<T,U,V>& A )
{
#ifndef RELEASE
PushCallStack("MakeTrapezoidal");
#endif
const int height = A.Height();
const int width = A.Width();
const int localHeight = A.LocalHeight();
const int localWidth = A.LocalWidth();
const int colShift = A.ColShift();
const int rowShift = A.RowShift();
const int colStride = A.ColStride();
const int rowStride = A.RowStride();
T* localBuffer = A.LocalBuffer();
const int ldim = A.LocalLDim();
if( uplo == LOWER )
{
#ifdef HAVE_OPENMP
#pragma omp parallel for
#endif
for( int jLocal=0; jLocal<localWidth; ++jLocal )
{
const int j = rowShift + jLocal*rowStride;
const int lastZeroRow =
( side==LEFT ? j-offset-1
: j-offset+height-width-1 );
if( lastZeroRow >= 0 )
{
const int boundary = std::min( lastZeroRow+1, height );
const int numZeroRows =
RawLocalLength( boundary, colShift, colStride );
MemZero( &localBuffer[jLocal*ldim], numZeroRows );
}
}
}
else
{
#ifdef HAVE_OPENMP
#pragma omp parallel for
#endif
for( int jLocal=0; jLocal<localWidth; ++jLocal )
{
const int j = rowShift + jLocal*rowStride;
const int firstZeroRow =
( side==LEFT ? std::max(j-offset+1,0)
: std::max(j-offset+height-width+1,0) );
const int numNonzeroRows =
RawLocalLength(firstZeroRow,colShift,colStride);
if( numNonzeroRows < localHeight )
{
T* col = &localBuffer[numNonzeroRows+jLocal*ldim];
MemZero( col, localHeight-numNonzeroRows );
}
}
}
#ifndef RELEASE
PopCallStack();
#endif
}
