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jiri 2009-11-12 11:09:30 +00:00
parent 91d130e0f7
commit 87be923400
1 changed files with 33 additions and 1 deletions
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34
sparsesmat.cc
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@ -58,7 +58,7 @@ for(SPMatindex k=0; k<nn; ++k) //summation loop
//make multiply via blas
NRMat<T> prod=av.otimes(bv,false,alpha);
//scatter the results
//scatter the results -- probably the computational bottleneck
for(i=0; i<prod.nrows(); ++i) for(j=0; j<prod.ncols(); ++j)
add(ai[i],bi[j],prod(i,j),false);
@ -85,10 +85,42 @@ return *this;
}
template <class T>
void SparseSMat<T>::axpy(const T alpha, const SparseSMat &x, const bool transp)
{
if(nn!=x.nn) laerror("incompatible matrix dimensions in SparseSMat::axpy");
if(alpha==(T)0) return;
copyonwrite();
for(SPMatindex i=0; i<nn; ++i) if(x.v[i])
{
if(!v[i]) v[i] = new std::map<SPMatindex,T>;
typename std::map<SPMatindex,T>::iterator p;
for(p=x.v[i]->begin(); p!=x.v[i]->end(); ++p) (*v[i])[p->first] = p->second * alpha;
}
}
template <class T>
void SparseSMat<T>::gemv(const T beta, NRVec<T> &r, const char trans, const T alpha, const NRVec<T> &x) const
{
if(nn!=r.size() || nn!= x.size()) laerror("incompatible matrix vector dimensions in SparseSMat::gemv");
r *= beta;
if(alpha == (T)0) return;
r.copyonwrite();
for(SPMatindex i=0; i<nn; ++i) if(v[i])
{
typename std::map<SPMatindex,T>::iterator p;
for(p=v[i]->begin(); p!=v[i]->end(); ++p) r[i] += x[p->first] * p->second * alpha ;
}
}
#define INSTANTIZE(T) \
template void SparseSMat<T>::gemm(const T beta, const SparseSMat &a, const char transa, const SparseSMat &b, const char transb, const T alpha); \
template SparseSMat<T> & SparseSMat<T>::operator*=(const T &a); \
template void SparseSMat<T>::gemv(const T beta, NRVec<T> &r, const char trans, const T alpha, const NRVec<T> &x) const; \
template void SparseSMat<T>::axpy(const T alpha, const SparseSMat &x, const bool transp); \
INSTANTIZE(double)