portelli/Grid
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Minor cosmetic changes

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This commit is contained in:
Guido Cossu
2017-09-15 11:48:36 +01:00
parent 91eaace19d
commit b542d349b8
1 changed files with 68 additions and 69 deletions
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65
lib/qcd/action/scalar/ScalarImpl.h
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@@ -91,6 +91,9 @@ class ScalarImplTypes {
#define USE_FFT_ACCELERATION
#ifdef USE_FFT_ACCELERATION
#define FFT_MASS 0.707
#endif
template <class S, unsigned int N>
@@ -113,8 +116,8 @@ class ScalarImplTypes {
typedef Field FermionField;
typedef Field PropagatorField;
static void MomentaSquare(ComplexField& out){
static void MomentaSquare(ComplexField &out)
{
GridBase *grid = out._grid;
const std::vector<int> &l = grid->FullDimensions();
ComplexField kmu(grid);
@@ -131,29 +134,27 @@ class ScalarImplTypes {
static void MomentumSpacePropagator(ComplexField &out, RealD m)
{
GridBase *grid = out._grid;
ComplexField one(grid); one = Complex(1.0,0.0);
ComplexField one(grid);
one = Complex(1.0, 0.0);
out = m * m;
MomentaSquare(out);
out = one / out;
}
static inline void generate_momenta(Field& P, GridParallelRNG& pRNG) {
static inline void generate_momenta(Field &P, GridParallelRNG &pRNG)
{
#ifndef USE_FFT_ACCELERATION
Group::GaussianFundamentalLieAlgebraMatrix(pRNG, P);
#else
Field Ptmp(P._grid), Pp(P._grid);
Group::GaussianFundamentalLieAlgebraMatrix(pRNG, Ptmp);
// if we change the mass I need a renormalization here
// transform and multiply by (M*M+p*p)^-1
GridCartesian *Grid = dynamic_cast<GridCartesian*>(P._grid);
FFT theFFT(Grid);
ComplexField p2(Grid);
RealD M = 1.0;
p2= zero;
Field Pgaussian(P._grid), Pp(P._grid);
ComplexField p2(P._grid); p2 = zero;
RealD M = FFT_MASS;
theFFT.FFT_all_dim(Pp,Ptmp,FFT::forward);
Group::GaussianFundamentalLieAlgebraMatrix(pRNG, Pgaussian);
FFT theFFT((GridCartesian*)P._grid);
theFFT.FFT_all_dim(Pp, Pgaussian, FFT::forward);
MomentaSquare(p2);
p2 += M * M;
p2 = sqrt(p2);
@@ -165,34 +166,34 @@ class ScalarImplTypes {
static inline Field projectForce(Field& P) {return P;}
static inline void update_field(Field& P, Field& U, double ep) {
static inline void update_field(Field &P, Field &U, double ep)
{
#ifndef USE_FFT_ACCELERATION
U += P * ep;
#else
// Here we can eventually add the Fourier acceleration
// FFT transform P(x) -> P(p)
// divide by (M^2+p^2) M external parameter (how to pass?)
// P'(p) = P(p)/(M^2+p^2)
// Transform back -> P'(x)
// U += P'(x)*ep
// the dynamic cast is safe
GridCartesian *Grid = dynamic_cast<GridCartesian*>(U._grid);
FFT theFFT(Grid);
Field Pp(Grid), Pnew(Grid);
std::vector<int> full_dim = Grid->FullDimensions();
Field Pp(U._grid), P_FFT(U._grid);
static ComplexField p2(U._grid);
RealD M = FFT_MASS;
FFT theFFT((GridCartesian*)U._grid);
theFFT.FFT_all_dim(Pp, P, FFT::forward);
RealD M = 1.0;
static bool first_call = true;
static ComplexField p2(Grid);
if (first_call){
if (first_call)
{
// avoid recomputing
MomentumSpacePropagator(p2, M);
first_call = false;
}
Pp *= p2;
theFFT.FFT_all_dim(Pnew,Pp,FFT::backward);
U += Pnew * ep;
theFFT.FFT_all_dim(P_FFT, Pp, FFT::backward);
U += P_FFT * ep;
#endif //USE_FFT_ACCELERATION
}
@@ -207,14 +208,12 @@ class ScalarImplTypes {
// 1 FFT needed U(x) -> U(p)
// M to be passed
GridCartesian *Grid = dynamic_cast<GridCartesian *>(U._grid);
FFT theFFT(Grid);
Field Up(Grid), Utilde(Grid);
std::vector<int> full_dim = Grid->FullDimensions();
FFT theFFT((GridCartesian*)U._grid);
Field Up(U._grid);
theFFT.FFT_all_dim(Up, U, FFT::forward);
RealD M = 1.0;
ComplexField p2(Grid);
RealD M = FFT_MASS;
ComplexField p2(U._grid);
MomentumSpacePropagator(p2, M);
Field Up2 = Up * p2;
// from the definition of the DFT we need to divide by the volume