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X_psi.c
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X_psi.c
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/***********************************************************************
*
* Copyright (C) 2011 Elena Garcia-Ramos
*
* This file is part of tmLQCD.
*
* tmLQCD is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* tmLQCD is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with tmLQCD. If not, see <http://www.gnu.org/licenses/>.
***********************************************************************/
#ifdef HAVE_CONFIG_H
# include<config.h>
#endif
#include <stdlib.h>
#ifdef HAVE_CONFIG_H
# include<config.h>
#endif
#include "global.h"
#include "su3.h"
#include "linalg_eo.h"
#include "D_psi.h"
#include "gamma.h"
#include "X_psi.h"
#include "tm_operators.h"
#include "read_input.h"
void DdaggerD_plus_M(spinor * const R, spinor * const S)
{
double g_muWithoutMStarSquare=g_mu;
g_mu=sqrt(g_mu*g_mu+mstarsq);
Q_pm_psi(R, S);
g_mu=g_muWithoutMStarSquare;
/* spinor *aux_ = NULL, *aux;
spinor *aux2_ = NULL, *aux2;
int N = VOLUMEPLUSRAND;
double twokmu, g_musq;
#if ( defined SSE || defined SSE2 || defined SSE3)
aux_=calloc(VOLUMEPLUSRAND+1, sizeof(spinor));
aux = (spinor *)(((unsigned long int)(aux_)+ALIGN_BASE)&~ALIGN_BASE);
aux2_=calloc(VOLUMEPLUSRAND+1, sizeof(spinor));
aux2 = (spinor *)(((unsigned long int)(aux2_)+ALIGN_BASE)&~ALIGN_BASE);
#else
aux_=calloc(VOLUMEPLUSRAND, sizeof(spinor));
aux = aux_;
aux2_=calloc(VOLUMEPLUSRAND, sizeof(spinor));
aux2 = aux2_;
#endif
assign(aux2, S, VOLUME);
// we have to apply DdagerD and M*^2 to the same field S
twokmu=g_mu;
g_mu=0.;
//org:
//D_psi(R, S);
//gamma5(aux, R, VOLUME);
//D_psi(R, aux);
//gamma5(R, R, VOLUME);
D_psi(aux, S);
gamma5(R, aux, VOLUME);
D_psi(aux,R);
gamma5(R, aux, VOLUME);
g_mu=twokmu;
g_musq=g_mu*g_mu;
assign_add_mul_r(R, aux2, mstarsq, VOLUME);
if(g_musq!=0) assign_add_mul_r(R, aux2, g_musq, VOLUME);
free(aux_);
free(aux2_);*/
}
#define X_psiSIterations 5000
#define X_psiSPrecision 1.e-6
void X_psi(spinor * const R, spinor * const S, double const mstarsq){
// double a = -2*mstar*mstar;
double a = -2*mstarsq;
double b = 1.;
double g_muWithoutMStarSquare=g_mu;
/*cg_her(out spinor, in spinor, max iter, solver precision, flag relative precision default 0, volume, operator to invert)*/
#ifdef HAVE_GPU
if(usegpu_flag)
{
if(g_proc_id == 0) printf("Using GPU for inversion\n");
// call mixed_solve_DiracDaggerDaggerD for double precision calculations on gpu - may be faster if the device supports compute capability >= 2.0 (fermi generation)
{//include M^{*2} into twisted mass g_mu => saves one assign_multiply_add;
g_mu=sqrt(g_mu*g_mu+mstarsq);
mixed_solve_DiracDaggerDirac ( R, S, X_psiSIterations, X_psiSPrecision, 0/*!rel_prec*/, VOLUME);
//mixed_solve_DiracDaggerDiracD( R, S, X_psiSIterations, X_psiSPrecision, 0/*!rel_prec*/, VOLUME);
g_mu=g_muWithoutMStarSquare;
}
}
else
#endif
{
if(g_proc_id == 0) printf("Using CPU for inversion\n");
cg_her( R, S, X_psiSIterations, X_psiSPrecision, 0, VOLUME, &DdaggerD_plus_M);
}
fflush(stdout);
/*//// Test
spinor *aux_ = NULL, *aux;
int N = VOLUMEPLUSRAND;
#if ( defined SSE || defined SSE2 || defined SSE3)
aux_=calloc(VOLUMEPLUSRAND+1, sizeof(spinor));
aux = (spinor *)(((unsigned long int)(aux_)+ALIGN_BASE)&~ALIGN_BASE);
#else
aux_=calloc(VOLUMEPLUSRAND, sizeof(spinor));
aux = aux_;
#endif
//Q_pm_psi_gpu(aux,R);
DdaggerD_plus_M(aux,R);
diff(aux,S,aux,N);
double t=square_norm(aux,N,1);
printf("TestMStar %lf\n",t);
exit(1);
*//// Test
assign_mul_add_mul_r( R, S, a, b, VOLUME);
}
void X_psiSquare(spinor * const R, spinor * const S, double const mstarsq)
{//inverts DD^+DD^+ instead of DD^+ but performs poorly
spinor *aux_,*aux;
{
#if ( defined SSE || defined SSE2 || defined SSE3 )
aux_=calloc(VOLUMEPLUSRAND+1, sizeof(spinor));
aux = (spinor *)(((unsigned long int)(aux_)+ALIGN_BASE)&~ALIGN_BASE);
#else
aux_=calloc(VOLUMEPLUSRAND, sizeof(spinor));
aux = aux_;
#endif
}
#ifdef HAVE_GPU
if(usegpu_flag)
{
if(g_proc_id == 0) printf("Using GPU for inversion\n");
// call mixed_solve_DiracDaggerDaggerD for double precision calculations on gpu - may be faster if the device supports compute capability >= 2.0 (fermi generation)
{//include M^{*2} into twisted mass g_mu => saves one assign_multiply_add;
double g_muWithoutMStarSquare=g_mu;
g_mu=sqrt(g_mu*g_mu+mstarsq);
mixed_solve_DiracDaggerDiracDiracDaggerDirac ( R, S, X_psiSIterations, X_psiSPrecision, 0/*!rel_prec*/, VOLUME);
//mixed_solve_DiracDaggerDiracDiracDagerDiracD( R, S, X_psiSIterations, X_psiSPrecision, 0/*!rel_prec*/, VOLUME);
g_mu=g_muWithoutMStarSquare;
}//R holds now the value of (D^+DD^+D)^-1 !
DdaggerD_plus_M(aux,R);
assign_mul_add_mul_r( R, aux, mstarsq, -1, VOLUME);
assign_mul_add_mul_r( R, S, 4*mstarsq, 1, VOLUME);//1-4mstarsq(-(D^+D+mstarsq)^-1 + mstarsq*(D^+D+mstarsq)^-2)
free(aux_);
fflush(stdout);
}
else
#endif
{
X_psi(aux, S, mstarsq);
X_psi(R, aux, mstarsq);
}
free(aux_);
}