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working on tensor

This commit is contained in:
Jiri Pittner 2024-04-06 06:37:17 +02:00
parent 2b20bff532
commit 42c03ef9de
2 changed files with 21 additions and 9 deletions
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2
tensor.cc
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@ -193,6 +193,7 @@ template<typename T>
void Tensor<T>::put(int fd) const
{
shape.put(fd,true);
groupsizes.put(fd,true);
cumsizes.put(fd,true);
data.put(fd,true);
}
@ -202,6 +203,7 @@ void Tensor<T>::get(int fd)
{
shape.get(fd,true);
myrank=calcrank(); //is not stored but recomputed
groupsizes.put(fd,true);
cumsizes.get(fd,true);
data.get(fd,true);
}

28
tensor.h
View File

@ -89,6 +89,7 @@ template<typename T>
class Tensor {
int myrank;
NRVec<indexgroup> shape;
NRVec<LA_largeindex> groupsizes; //group sizes of symmetry index groups (a function of shape but precomputed for efficiency)
NRVec<LA_largeindex> cumsizes; //cumulative sizes of symmetry index groups (a function of shape but precomputed for efficiency)
NRVec<T> data;
@ -101,12 +102,14 @@ private:
public:
//constructors
Tensor() : myrank(0) {};
Tensor(const NRVec<indexgroup> &s) : shape(s), data((int)getsize()), myrank(calcrank()) {data.clear();}; //general tensor
Tensor(const indexgroup &g) {shape.resize(1); shape[0]=g; data.resize(getsize()); myrank=calcrank(); data.clear();}; //tensor with a single index group
Tensor(const NRVec<indexgroup> &s) : shape(s), data((int)calcsize()), myrank(calcrank()) {}; //general tensor
Tensor(const indexgroup &g) {shape.resize(1); shape[0]=g; data.resize(calcsize()); myrank=calcrank();}; //tensor with a single index group
Tensor(const Tensor &rhs): myrank(rhs.myrank), shape(rhs.shape), groupsizes(rhs.groupsizes), cumsizes(rhs.cumsizes), data(rhs.data) {};
void clear() {data.clear();};
int rank() const {return myrank;};
int calcrank(); //is computed from shape
LA_largeindex getsize(); //set redundant data and return total size
LA_largeindex calcsize(); //set redundant data and return total size
LA_largeindex size() const {return data.size();};
void copyonwrite() {shape.copyonwrite(); data.copyonwrite();};
inline Signedpointer<T> lhs(const SUPERINDEX &I) {int sign; LA_largeindex i=index(&sign,I); return Signedpointer<T>(&data[i],sign);};
@ -116,18 +119,24 @@ public:
inline Signedpointer<T> lhs(LA_index i1...) {va_list args; int sign; LA_largeindex i; va_start(args,i1); i= vindex(&sign, i1,args); return Signedpointer<T>(&data[i],sign); };
inline T operator()(LA_index i1...) {va_list args; ; int sign; LA_largeindex i; va_start(args,i1); i= vindex(&sign, i1,args); if(sign==0) return 0; return sign>0 ?data[i] : -data[i];};
inline Tensor& operator=(const Tensor &rhs) {myrank=rhs.myrank; shape=rhs.shape; groupsizes=rhs.groupsizes; cumsizes=rhs.cumsizes; data=rhs.data; return *this;};
inline Tensor& operator*=(const T &a) {data*=a; return *this;};
inline Tensor operator*(const T &a) const {Tensor r(*this); r *=a; return r;};
inline Tensor& operator/=(const T &a) {data/=a; return *this;};
inline Tensor operator/(const T &a) const {Tensor r(*this); r /=a; return r;};
void put(int fd) const;
void get(int fd);
//@@@TODO - unwinding to full size in a specified index
//@@@TODO - contractions - basic and efficient
//@@@dodelat indexy
//@@@TODO - contractions - basic and efficient? first contraction in a single index; between a given group+index in group at each tensor
//@@@ dvojite rekurzivni loopover s callbackem - nebo iterator s funkci next???
//@@@nebo inverse index function?
//@@@ stream i/o na zaklade tohoto
//@@@permuteindexgroups
//@@@symmetreize a group, antisymmetrize a group, expand a (anti)symmetric grtoup
//@@@@@@+= -= + - on same shape
};
@ -148,8 +157,9 @@ return r;
template<typename T>
LA_largeindex Tensor<T>::getsize()
LA_largeindex Tensor<T>::calcsize()
{
groupsizes.resize(shape.size());
cumsizes.resize(shape.size());
LA_largeindex s=1;
for(int i=0; i<shape.size(); ++i)
@ -160,13 +170,13 @@ for(int i=0; i<shape.size(); ++i)
switch(shape[i].symmetry)
{
case 0:
s *= longpow(shape[i].range,shape[i].number);
s *= groupsizes[i] = longpow(shape[i].range,shape[i].number);
break;
case 1:
s *= simplicial(shape[i].number,shape[i].range);
s *= groupsizes[i] = simplicial(shape[i].number,shape[i].range);
break;
case -1:
s *= simplicial(shape[i].number,shape[i].range-shape[i].number+1);
s *= groupsizes[i] = simplicial(shape[i].number,shape[i].range-shape[i].number+1);
break;
default:
laerror("illegal index group symmetry");