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D_psi.c
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D_psi.c
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/***********************************************************************
*
* Copyright (C) 2001 Martin Luescher
* original code
* changed and extended for twisted mass 2002 Andrea Shindler
* 2007,2008 Carsten Urbach
*
* Blue Gene version Copyright (C) 2007 Carsten Urbach
* Block Dirac operator Copyright (C) 2008 Carsten Urbach
*
* 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/>.
*
* Action of a Dirac operator D (Wilson or twisted) on a given spinor field
*
* various versions including a block version.
*
*******************************************************************************/
#ifdef HAVE_CONFIG_H
# include<config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include "global.h"
#include "su3.h"
#include "sse.h"
#include "boundary.h"
#ifdef MPI
# include "xchange_lexicfield.h"
#endif
#include "update_backward_gauge.h"
#include "block.h"
#include "D_psi.h"
#include "solver/dirac_operator_eigenvectors.h"
static spinor tmpr;
#if (defined SSE23 || defined SSE33)
#elif (defined BGL && defined XLC)
/* We have 32 registers available */
static double _Complex reg00, reg01, reg02, reg03, reg04, reg05;
static double _Complex reg10, reg11, reg12, reg13, reg14, reg15;
/* For the gauge field, reuse the first three!*/
static double _Complex u00, u01, u02, u10, u11, u12;
static double _Complex reg20, reg21;
/* The following contains the result spinor (12 regs) */
static double _Complex rs00, rs01, rs02, rs10, rs11, rs12, rs20, rs21, rs22,
rs30, rs31, rs32;
/* this is the hopping part only */
void local_H(spinor * const rr, spinor * const s, su3 * u, int * _idx) {
int * idx = _idx;
su3 * restrict up ALIGN;
su3 * restrict um ALIGN;
spinor * restrict sp ALIGN;
spinor * restrict sm ALIGN;
#pragma disjoint(*s, *sp, *sm, *rr, *up, *um)
__alignx(16,rr);
__alignx(16,s);
/*********************** direction +0 ************************/
up = u;
sp = (spinor *) s + (*idx);
idx++;
um = up+1;
_prefetch_su3(um);
sm = (spinor *) s + (*idx);
_prefetch_spinor(sm);
idx++;
_bgl_load_reg0(sp->s0);
_bgl_load_reg1(sp->s1);
_bgl_load_reg0_up(sp->s2);
_bgl_load_reg1_up(sp->s3);
_bgl_vector_add_reg0();
_bgl_vector_add_reg1();
/* result is now in regx0, regx1, regx2 x = 0,1 */
_bgl_su3_multiply_double((*up));
_bgl_vector_cmplx_mul_double(phase_0);
_bgl_add_to_rs0_reg0();
_bgl_add_to_rs2_reg0();
_bgl_add_to_rs1_reg1();
_bgl_add_to_rs3_reg1();
/*********************** direction -0 ************************/
up = um+1;
_prefetch_su3(up);
sp = (spinor*) s + (*idx);
_prefetch_spinor(sp);
idx++;
_bgl_load_reg0(sm->s0);
_bgl_load_reg1(sm->s1);
_bgl_load_reg0_up(sm->s2);
_bgl_load_reg1_up(sm->s3);
_bgl_vector_sub_reg0();
_bgl_vector_sub_reg1();
_bgl_su3_inverse_multiply_double((*um));
_bgl_vector_cmplxcg_mul_double(phase_0);
_bgl_add_to_rs0_reg0();
_bgl_sub_from_rs2_reg0();
_bgl_add_to_rs1_reg1();
_bgl_sub_from_rs3_reg1();
/*********************** direction +1 ************************/
um = up+1;
_prefetch_su3(um);
sm = (spinor*) s + (*idx);
_prefetch_spinor(sm);
idx++;
_bgl_load_reg0(sp->s0);
_bgl_load_reg1(sp->s1);
_bgl_load_reg0_up(sp->s3);
_bgl_load_reg1_up(sp->s2);
_bgl_vector_i_mul_add_reg0();
_bgl_vector_i_mul_add_reg1();
_bgl_su3_multiply_double((*up));
_bgl_vector_cmplx_mul_double(phase_1);
_bgl_add_to_rs0_reg0();
_bgl_i_mul_sub_from_rs3_reg0();
_bgl_add_to_rs1_reg1();
_bgl_i_mul_sub_from_rs2_reg1();
/*********************** direction -1 ************************/
up = um+1;
_prefetch_su3(up);
sp = (spinor*) s + (*idx);
_prefetch_spinor(sp);
idx++;
_bgl_load_reg0(sm->s0);
_bgl_load_reg1(sm->s1);
_bgl_load_reg0_up(sm->s3);
_bgl_load_reg1_up(sm->s2);
_bgl_vector_i_mul_sub_reg0();
_bgl_vector_i_mul_sub_reg1();
_bgl_su3_inverse_multiply_double((*um));
_bgl_vector_cmplxcg_mul_double(phase_1);
_bgl_add_to_rs0_reg0();
_bgl_add_to_rs1_reg1();
_bgl_i_mul_add_to_rs3_reg0();
_bgl_i_mul_add_to_rs2_reg1();
/*********************** direction +2 ************************/
um = up+1;
_prefetch_su3(um);
sm = (spinor*) s + (*idx);
_prefetch_spinor(sm);
idx++;
_bgl_load_reg0(sp->s0);
_bgl_load_reg1(sp->s1);
_bgl_load_reg1_up(sp->s2);
_bgl_load_reg0_up(sp->s3);
_bgl_vector_add_reg0();
_bgl_vector_sub_reg1();
_bgl_su3_multiply_double((*up));
_bgl_vector_cmplx_mul_double(phase_2);
_bgl_add_to_rs0_reg0();
_bgl_add_to_rs1_reg1();
_bgl_sub_from_rs2_reg1();
_bgl_add_to_rs3_reg0();
/*********************** direction -2 ************************/
up = um+1;
_prefetch_su3(up);
sp = (spinor*) s + (*idx);
_prefetch_spinor(sp);
idx++;
_bgl_load_reg0(sm->s0);
_bgl_load_reg1(sm->s1);
_bgl_load_reg1_up(sm->s2);
_bgl_load_reg0_up(sm->s3);
_bgl_vector_sub_reg0();
_bgl_vector_add_reg1();
_bgl_su3_inverse_multiply_double((*um));
_bgl_vector_cmplxcg_mul_double(phase_2);
_bgl_add_to_rs0_reg0();
_bgl_add_to_rs1_reg1();
_bgl_add_to_rs2_reg1();
_bgl_sub_from_rs3_reg0();
/*********************** direction +3 ************************/
um = up+1;
_prefetch_su3(um);
sm = (spinor*) s + (*idx);
_prefetch_spinor(sm);
_bgl_load_reg0(sp->s0);
_bgl_load_reg1(sp->s1);
_bgl_load_reg0_up(sp->s2);
_bgl_load_reg1_up(sp->s3);
_bgl_vector_i_mul_add_reg0();
_bgl_vector_i_mul_sub_reg1();
_bgl_su3_multiply_double((*up));
_bgl_vector_cmplx_mul_double(phase_3);
_bgl_add_to_rs0_reg0();
_bgl_add_to_rs1_reg1();
_bgl_i_mul_sub_from_rs2_reg0();
_bgl_i_mul_add_to_rs3_reg1();
/*********************** direction -3 ************************/
_bgl_load_reg0(sm->s0);
_bgl_load_reg1(sm->s1);
_bgl_load_reg0_up(sm->s2);
_bgl_load_reg1_up(sm->s3);
_bgl_vector_i_mul_sub_reg0();
_bgl_vector_i_mul_add_reg1();
_bgl_su3_inverse_multiply_double((*um));
_bgl_vector_cmplxcg_mul_double(phase_3);
_bgl_add_to_rs0_reg0();
_bgl_store_rs0(rr->s0);
_bgl_i_mul_add_to_rs2_reg0();
_bgl_store_rs2(rr->s2);
_bgl_add_to_rs1_reg1();
_bgl_store_rs1(rr->s1);
_bgl_i_mul_sub_from_rs3_reg1();
_bgl_store_rs3(rr->s3);
}
#else
static inline void p0add(spinor * restrict const s,
su3 * restrict const u, const _Complex double phase) {
static su3_vector chi, psi;
_vector_add(psi,s->s0, s->s2);
_su3_multiply(chi, (*u), psi);
_complex_times_vector(psi, phase, chi);
_vector_add_assign(tmpr.s0, psi);
_vector_add_assign(tmpr.s2, psi);
_vector_add(psi, s->s1, s->s3);
_su3_multiply(chi, (*u), psi);
_complex_times_vector(psi, phase, chi);
_vector_add_assign(tmpr.s1, psi);
_vector_add_assign(tmpr.s3, psi);
return;
}
static inline void m0add(spinor * restrict const s,
su3 * restrict const u, const _Complex double phase) {
static su3_vector chi, psi;
_vector_sub(psi, s->s0, s->s2);
_su3_inverse_multiply(chi, (*u), psi);
_complexcjg_times_vector(psi, phase, chi);
_vector_add_assign(tmpr.s0, psi);
_vector_sub_assign(tmpr.s2, psi);
_vector_sub(psi, s->s1, s->s3);
_su3_inverse_multiply(chi, (*u), psi);
_complexcjg_times_vector(psi, phase, chi);
_vector_add_assign(tmpr.s1, psi);
_vector_sub_assign(tmpr.s3, psi);
return;
}
static inline void p1add(spinor * restrict const s,
su3 * restrict const u, const _Complex double phase) {
static su3_vector chi, psi;
_vector_i_add(psi,s->s0,s->s3);
_su3_multiply(chi,(*u),psi);
_complex_times_vector(psi, phase, chi);
_vector_add_assign(tmpr.s0, psi);
_vector_i_sub_assign(tmpr.s3, psi);
_vector_i_add(psi, s->s1, s->s2);
_su3_multiply(chi, (*u), psi);
_complex_times_vector(psi, phase, chi);
_vector_add_assign(tmpr.s1, psi);
_vector_i_sub_assign(tmpr.s2, psi);
return;
}
static inline void m1add(spinor * restrict const s,
su3 * restrict const u, const _Complex double phase) {
static su3_vector chi, psi;
_vector_i_sub(psi,s->s0, s->s3);
_su3_inverse_multiply(chi,(*u), psi);
_complexcjg_times_vector(psi, phase, chi);
_vector_add_assign(tmpr.s0, psi);
_vector_i_add_assign(tmpr.s3, psi);
_vector_i_sub(psi, s->s1, s->s2);
_su3_inverse_multiply(chi, (*u), psi);
_complexcjg_times_vector(psi, phase, chi);
_vector_add_assign(tmpr.s1, psi);
_vector_i_add_assign(tmpr.s2, psi);
return;
}
static inline void p2add(spinor * restrict const s,
su3 * restrict const u, const _Complex double phase) {
static su3_vector chi, psi;
_vector_add(psi,s->s0,s->s3);
_su3_multiply(chi, (*u), psi);
_complex_times_vector(psi, phase, chi);
_vector_add_assign(tmpr.s0, psi);
_vector_add_assign(tmpr.s3, psi);
_vector_sub(psi,s->s1,s->s2);
_su3_multiply(chi, (*u), psi);
_complex_times_vector(psi, phase, chi);
_vector_add_assign(tmpr.s1, psi);
_vector_sub_assign(tmpr.s2, psi);
return;
}
static inline void m2add(spinor * restrict const s,
su3 * restrict const u, const _Complex double phase) {
static su3_vector chi, psi;
_vector_sub(psi, s->s0, s->s3);
_su3_inverse_multiply(chi, (*u), psi);
_complexcjg_times_vector(psi, phase, chi);
_vector_add_assign(tmpr.s0, psi);
_vector_sub_assign(tmpr.s3, psi);
_vector_add(psi, s->s1, s->s2);
_su3_inverse_multiply(chi, (*u),psi);
_complexcjg_times_vector(psi, phase, chi);
_vector_add_assign(tmpr.s1, psi);
_vector_add_assign(tmpr.s2, psi);
return;
}
static inline void p3add(spinor * restrict const s,
su3 * restrict const u, const _Complex double phase) {
static su3_vector chi, psi;
_vector_i_add(psi, s->s0, s->s2);
_su3_multiply(chi, (*u), psi);
_complex_times_vector(psi, phase, chi);
_vector_add_assign(tmpr.s0, psi);
_vector_i_sub_assign(tmpr.s2, psi);
_vector_i_sub(psi,s->s1, s->s3);
_su3_multiply(chi, (*u), psi);
_complex_times_vector(psi, phase, chi);
_vector_add_assign(tmpr.s1, psi);
_vector_i_add_assign(tmpr.s3, psi);
return;
}
static inline void m3addandstore(spinor * restrict const r, spinor * restrict const s,
su3 * restrict const u, const _Complex double phase) {
static su3_vector chi, psi;
_vector_i_sub(psi,s->s0, s->s2);
_su3_inverse_multiply(chi, (*u), psi);
_complexcjg_times_vector(psi, phase, chi);
_vector_add(r->s0, tmpr.s0, psi);
_vector_i_add(r->s2, tmpr.s2, psi);
_vector_i_add(psi, s->s1, s->s3);
_su3_inverse_multiply(chi, (*u), psi);
_complexcjg_times_vector(psi, phase, chi);
_vector_add(r->s1, tmpr.s1, psi);
_vector_i_sub(r->s3, tmpr.s3, psi);
return;
}
/* this is the hopping part only */
static inline void local_H(spinor * const rr, spinor * const s, su3 * restrict u, int * _idx) {
int * idx = _idx;
/****** direction +0 ******/
p0add(s + (*idx), u, phase_0);
u++;
idx++;
/****** direction -0 ******/
m0add(s + (*idx), u, phase_0);
u++;
idx++;
/****** direction +1 ******/
p1add(s + (*idx), u, phase_1);
u++;
idx++;
/****** direction -1 ******/
m1add(s + (*idx), u, phase_1);
u++;
idx++;
/****** direction +2 ******/
p2add(s + (*idx), u, phase_2);
u++;
idx++;
/****** direction -2 ******/
m2add(s + (*idx), u, phase_2);
u++;
idx++;
/****** direction +3 ******/
p3add(s + (*idx), u, phase_3);
u++;
idx++;
/****** direction -3 ******/
m3addandstore(rr, s + (*idx), u, phase_3);
return;
}
#endif
#if (defined SSE2 || defined SSE3)
static spinor rs __attribute__ ((aligned (16)));
/* Serially Checked ! */
void D_psi(spinor * const P, spinor * const Q){
int ix,iy,iz;
su3 *up,*um;
spinor *s,*sp,*sm,*rn;
static _Complex double fact1, fact2;
if(P==Q){
printf("Error in D_psi (operator.c):\n");
printf("Arguments must be differen spinor fields\n");
printf("Program aborted\n");
exit(1);
}
#ifdef _GAUGE_COPY2
if(g_update_gauge_copy) {
update_backward_gauge(g_gauge_field);
}
#endif
# if defined MPI
xchange_lexicfield(Q);
# endif
fact1 = 1. + g_mu * I;
fact2 = conj(fact1);
iy=g_iup[0][0];
sp=(spinor *) Q + iy;
up=&g_gauge_field[0][0];
/************************ loop over all lattice sites *************************/
for (ix=0;ix<VOLUME;ix++){
s=(spinor *) Q + ix;
_prefetch_spinor(s);
/******************************* direction +0 *********************************/
iy=g_idn[ix][0];
sm = (spinor *) Q + iy;
_prefetch_spinor(sm);
_sse_load(sp->s0);
_sse_load_up(sp->s2);
_sse_vector_add();
_sse_su3_multiply((*up));
_sse_vector_cmplx_mul(phase_0);
_sse_store_up(rs.s2);
_sse_load_up(s->s0);
_sse_vector_cmplx_mul(fact1);
/* _sse_vector_mul(fact1); */
_sse_load(rs.s2);
_sse_vector_add();
_sse_store(rs.s0);
_sse_load_up(s->s2);
_sse_vector_cmplx_mul(fact2);
/* _sse_vector_mul(fact1); */
_sse_load(rs.s2);
_sse_vector_add();
_sse_store(rs.s2);
um=&g_gauge_field[iy][0];
_prefetch_su3(um);
_sse_load(sp->s1);
_sse_load_up(sp->s3);
_sse_vector_add();
_sse_su3_multiply((*up));
_sse_vector_cmplx_mul(phase_0);
_sse_store_up(rs.s3);
_sse_load_up(s->s1);
_sse_vector_cmplx_mul(fact1);
/* _sse_vector_mul(fact1); */
_sse_load(rs.s3);
_sse_vector_add();
_sse_store(rs.s1);
_sse_load_up(s->s3);
_sse_vector_cmplx_mul(fact2);
/* _sse_vector_mul(fact1); */
_sse_load(rs.s3);
_sse_vector_add();
_sse_store(rs.s3);
/******************************* direction -0 *********************************/
iy=g_iup[ix][1];
sp = (spinor *) Q + iy;
_prefetch_spinor(sp);
_sse_load(sm->s0);
_sse_load_up(sm->s2);
_sse_vector_sub();
_sse_su3_inverse_multiply((*um));
_sse_vector_cmplxcg_mul(phase_0);
_sse_load(rs.s0);
_sse_vector_add();
_sse_store(rs.s0);
_sse_load(rs.s2);
_sse_vector_sub();
_sse_store(rs.s2);
up+=1;
_prefetch_su3(up);
_sse_load(sm->s1);
_sse_load_up(sm->s3);
_sse_vector_sub();
_sse_su3_inverse_multiply((*um));
_sse_vector_cmplxcg_mul(phase_0);
_sse_load(rs.s1);
_sse_vector_add();
_sse_store(rs.s1);
_sse_load(rs.s3);
_sse_vector_sub();
_sse_store(rs.s3);
/******************************* direction +1 *********************************/
iy=g_idn[ix][1];
sm = (spinor *) Q + iy;
_prefetch_spinor(sm);
_sse_load(sp->s0);
_sse_load_up(sp->s3);
_sse_vector_i_mul();
_sse_vector_add();
_sse_su3_multiply((*up));
_sse_vector_cmplx_mul(phase_1);
_sse_load(rs.s0);
_sse_vector_add();
_sse_store(rs.s0);
_sse_load(rs.s3);
_sse_vector_i_mul();
_sse_vector_sub();
_sse_store(rs.s3);
um=&g_gauge_field[iy][1];
_prefetch_su3(um);
_sse_load(sp->s1);
_sse_load_up(sp->s2);
_sse_vector_i_mul();
_sse_vector_add();
_sse_su3_multiply((*up));
_sse_vector_cmplx_mul(phase_1);
_sse_load(rs.s1);
_sse_vector_add();
_sse_store(rs.s1);
_sse_load(rs.s2);
_sse_vector_i_mul();
_sse_vector_sub();
_sse_store(rs.s2);
/******************************* direction -1 *********************************/
iy=g_iup[ix][2];
sp = (spinor *) Q + iy;
_prefetch_spinor(sp);
_sse_load(sm->s0);
_sse_load_up(sm->s3);
_sse_vector_i_mul();
_sse_vector_sub();
_sse_su3_inverse_multiply((*um));
_sse_vector_cmplxcg_mul(phase_1);
_sse_load(rs.s0);
_sse_vector_add();
_sse_store(rs.s0);
_sse_load(rs.s3);
_sse_vector_i_mul();
_sse_vector_add();
_sse_store(rs.s3);
up+=1;
_prefetch_su3(up);
_sse_load(sm->s1);
_sse_load_up(sm->s2);
_sse_vector_i_mul();
_sse_vector_sub();
_sse_su3_inverse_multiply((*um));
_sse_vector_cmplxcg_mul(phase_1);
_sse_load(rs.s1);
_sse_vector_add();
_sse_store(rs.s1);
_sse_load(rs.s2);
_sse_vector_i_mul();
_sse_vector_add();
_sse_store(rs.s2);
/******************************* direction +2 *********************************/
iy=g_idn[ix][2];
sm = (spinor *) Q + iy;
_prefetch_spinor(sm);
_sse_load(sp->s0);
_sse_load_up(sp->s3);
_sse_vector_add();
_sse_su3_multiply((*up));
_sse_vector_cmplx_mul(phase_2);
_sse_load(rs.s0);
_sse_vector_add();
_sse_store(rs.s0);
_sse_load(rs.s3);
_sse_vector_add();
_sse_store(rs.s3);
um=&g_gauge_field[iy][2];
_prefetch_su3(um);
_sse_load(sp->s1);
_sse_load_up(sp->s2);
_sse_vector_sub();
_sse_su3_multiply((*up));
_sse_vector_cmplx_mul(phase_2);
_sse_load(rs.s1);
_sse_vector_add();
_sse_store(rs.s1);
_sse_load(rs.s2);
_sse_vector_sub();
_sse_store(rs.s2);
/******************************* direction -2 *********************************/
iy=g_iup[ix][3];
sp = (spinor *) Q + iy;
_prefetch_spinor(sp);
_sse_load(sm->s0);
_sse_load_up(sm->s3);
_sse_vector_sub();
_sse_su3_inverse_multiply((*um));
_sse_vector_cmplxcg_mul(phase_2);
_sse_load(rs.s0);
_sse_vector_add();
_sse_store(rs.s0);
_sse_load(rs.s3);
_sse_vector_sub();
_sse_store(rs.s3);
up+=1;
_prefetch_su3(up);
_sse_load(sm->s1);
_sse_load_up(sm->s2);
_sse_vector_add();
_sse_su3_inverse_multiply((*um));
_sse_vector_cmplxcg_mul(phase_2);
_sse_load(rs.s1);
_sse_vector_add();
_sse_store(rs.s1);
_sse_load(rs.s2);
_sse_vector_add();
_sse_store(rs.s2);
/******************************* direction +3 *********************************/
iy=g_idn[ix][3];
sm = (spinor *) Q + iy;
_prefetch_spinor(sm);
_sse_load(sp->s0);
_sse_load_up(sp->s2);
_sse_vector_i_mul();
_sse_vector_add();
_sse_su3_multiply((*up));
_sse_vector_cmplx_mul(phase_3);
_sse_load(rs.s0);
_sse_vector_add();
_sse_store(rs.s0);
_sse_load(rs.s2);
_sse_vector_i_mul();
_sse_vector_sub();
_sse_store(rs.s2);
um=&g_gauge_field[iy][3];
_prefetch_su3(um);
_sse_load(sp->s1);
_sse_load_up(sp->s3);
_sse_vector_i_mul();
_sse_vector_sub();
_sse_su3_multiply((*up));
_sse_vector_cmplx_mul(phase_3);
_sse_load(rs.s1);
_sse_vector_add();
_sse_store(rs.s1);
_sse_load(rs.s3);
_sse_vector_i_mul();
_sse_vector_add();
_sse_store(rs.s3);
/******************************* direction -3 *********************************/
iz=(ix+1+VOLUME)%VOLUME;
iy=g_iup[iz][0];
sp = (spinor *) Q + iy;
_prefetch_spinor(sp);
_sse_load(sm->s0);
_sse_load_up(sm->s2);
_sse_vector_i_mul();
_sse_vector_sub();
_sse_su3_inverse_multiply((*um));
_sse_vector_cmplxcg_mul(phase_3);
rn = (spinor *) P + ix;
_sse_load(rs.s0);
_sse_vector_add();
/* _sse_vector_mul(fact2); */
_sse_store_nt(rn->s0);
_sse_load(rs.s2);
_sse_vector_i_mul();
_sse_vector_add();
/* _sse_vector_mul(fact2); */
_sse_store_nt(rn->s2);
up=&g_gauge_field[iz][0];
_prefetch_su3(up);
_sse_load(sm->s1);
_sse_load_up(sm->s3);
_sse_vector_i_mul();
_sse_vector_add();
_sse_su3_inverse_multiply((*um));
_sse_vector_cmplxcg_mul(phase_3);
_sse_load(rs.s1);
_sse_vector_add();
/* _sse_vector_mul(fact2); */
_sse_store_nt(rn->s1);
_sse_load(rs.s3);
_sse_vector_i_mul();
_sse_vector_sub();
/* _sse_vector_mul(fact2); */
_sse_store_nt(rn->s3);
/******************************** end of loop *********************************/
}
}
#elif ((defined BGL) && (defined XLC))
/**********************************
*
* Blue Gene/L Version
*
* Author: Carsten Urbach
*
**********************************/
/* Checked! */
void D_psi(spinor * const P, spinor * const Q){
int ix,iy,iz;
static _Complex double fact1;
su3 * restrict up ALIGN;
su3 * restrict um ALIGN;
spinor * restrict s ALIGN;
spinor * restrict sp ALIGN;
spinor * restrict sm ALIGN;
spinor * restrict rn ALIGN;
#pragma disjoint(*s, *sp, *sm, *rn, *up, *um, *P, *Q)
__alignx(16,P);
__alignx(16,Q);
#ifdef _GAUGE_COPY
if(g_update_gauge_copy) {
update_backward_gauge(g_gauge_field);
}
#endif
# if (defined MPI && !(defined _NO_COMM))
xchange_lexicfield(Q);
# endif
fact1 = 1.0 + g_mu * I;
iy=g_iup[0][0];
sp=(spinor *) Q + iy;
up=&g_gauge_field[0][0];
/**************** loop over all lattice sites ******************/
for(ix = 0; ix < VOLUME; ix++){
s=(spinor *) Q + ix;
rn = (spinor *) P + ix;
/*********************** direction +0 ************************/
iy=g_idn[ix][0];
um=&g_gauge_field[iy][0];
_prefetch_su3(um);
sm = (spinor*) Q + iy;
_prefetch_spinor(sm);
_bgl_load_reg0(sp->s0);
_bgl_load_reg1(sp->s1);
_bgl_load_reg0_up(sp->s2);
_bgl_load_reg1_up(sp->s3);
_bgl_vector_add_reg0();
_bgl_vector_add_reg1();
/* result is now in regx0, regx1, regx2 x = 0,1 */
_bgl_su3_multiply_double((*up));
_bgl_vector_cmplx_mul_double(phase_0);
_bgl_load_rs0(s->s0);
_bgl_load_rs1(s->s1);
_bgl_load_rs2(s->s2);
_bgl_load_rs3(s->s3);
_bgl_vector_cmplx_mul_rs(fact1);
_bgl_add_to_rs0_reg0();
_bgl_add_to_rs2_reg0();
_bgl_add_to_rs1_reg1();
_bgl_add_to_rs3_reg1();
/*********************** direction -0 ************************/
iy=g_iup[ix][1];
up+=1;
_prefetch_su3(up);
sp = (spinor *) Q + iy;
_prefetch_spinor(sp);
_bgl_load_reg0(sm->s0);
_bgl_load_reg1(sm->s1);
_bgl_load_reg0_up(sm->s2);
_bgl_load_reg1_up(sm->s3);
_bgl_vector_sub_reg0();
_bgl_vector_sub_reg1();
_bgl_su3_inverse_multiply_double((*um));
_bgl_vector_cmplxcg_mul_double(phase_0);
_bgl_add_to_rs0_reg0();
_bgl_sub_from_rs2_reg0();
_bgl_add_to_rs1_reg1();
_bgl_sub_from_rs3_reg1();
/*********************** direction +1 ************************/
iy=g_idn[ix][1];
um=&g_gauge_field[iy][1];
_prefetch_su3(um);
sm = (spinor *) Q + iy;
_prefetch_spinor(sm);
_bgl_load_reg0(sp->s0);
_bgl_load_reg1(sp->s1);
_bgl_load_reg0_up(sp->s3);
_bgl_load_reg1_up(sp->s2);
_bgl_vector_i_mul_add_reg0();
_bgl_vector_i_mul_add_reg1();
_bgl_su3_multiply_double((*up));
_bgl_vector_cmplx_mul_double(phase_1);
_bgl_add_to_rs0_reg0();
_bgl_i_mul_sub_from_rs3_reg0();
_bgl_add_to_rs1_reg1();
_bgl_i_mul_sub_from_rs2_reg1();
/*********************** direction -1 ************************/