int read_qdppp_lattice_fermion_double(int latdims[], double *LatticeFermion, char *fin)
{
long int buff_size=latdims[0]*latdims[1]*latdims[2]*latdims[3]*4*3*2*8; /*size in bytes of a single precision lattice fermion*/
int num_elem=buff_size/8;
int check_reading;
check_reading=read_qdppp_scidac_binary_data((void *)LatticeFermion, buff_size,fin);
if(check_reading == EXIT_FAILURE)
{
fprintf(stderr,"Error reading SCIDAC binary data\n");
exit(EXIT_FAILURE);
}
/*test the machine endianness*/
int check_end=endianness();
if(check_end == UNKNOWN_ENDIAN)
{
fprintf(stderr,"Error: machine endianess is unknown.\n");
exit(EXIT_FAILURE);
}
if(check_end == BIG_ENDIAN)
return; /*no swapping is needed*/
if(check_end == LITTLE_ENDIAN)
bswap_double(num_elem,LatticeFermion);
return;
}
extern void import_cnfg_ildg(char *in)
{
int my_rank,np[4],n,ie,tag,status,prec=0;
int i,l,ix,iy,iz,it,ixx;
n_uint64_t read_bytes,nbytes=0;
double plaq1,eps;
MPI_Status stat;
LimeReader *reader=NULL;
FILE *fin;
char lime_type_target[100]="ildg-binary-data";
char *lime_type;
MPI_Comm_rank(MPI_COMM_WORLD,&my_rank);
/* allocate IO-buffers */
if (ubuf==NULL)
alloc_ubuf_ildg(my_rank);
error(pud[VOLUME/2][0]==NULL,1,"import_cnfg [archive_ildg.c]",
"Double-precision gauge field is not allocated");
ie=check_machine();
if (my_rank==0)
{
fin=fopen(in,"rb");
error_root(fin==NULL,1,"import_cnfg [archive_ildg.c]",
"Unable to open input file");
reader=limeCreateReader(fin);
error( reader == (LimeReader *)NULL ,1,"import_cnfg [archive_ildg.c]",
"Unable to open LimeReader");
nbytes = (n_uint64_t)0;
/* set the file-pointer to the beginning of the "ildg-binary-data" tag
* in the LIME file */
while( (status = limeReaderNextRecord(reader)) != LIME_EOF ){
nbytes = limeReaderBytes(reader);
lime_type = limeReaderType(reader);
error((status!=LIME_SUCCESS),1,"import_cnfg [archive_ildg.c]",
"limeReaderNextRecord returned status %d and LIME_SUCCESS %d\n",
status,LIME_SUCCESS);
if (strcmp(lime_type,lime_type_target) != 0) continue;
break;
}
/* Decide whether the gauge file is stored in single or
* double precision format */
if ((int)nbytes==8*VOLUME*NPROC*3*3*4*2){
prec=8;
message("ILDG-file contains double precision gauge field\n");
}
else if ((int)nbytes==4*VOLUME*NPROC*3*3*4*2){
prec=4;
message("ILDG-file contains single precision gauge field\n");
}
else
error(1!=0,1,"import_cnfg [archive_ildg]",
"Lattice geometry doesn't match size of gauge field %d %d\n");
}
/* Now read the gauge file in steps of 4 SU(3) matrices */
for (it=0;it<N0;it++){
for (iz=0;iz<N3;iz++){
for (iy=0;iy<N2;iy++){
for (ix=0;ix<N1;ix++){
if(my_rank==0){
if(prec==8){
read_bytes = (n_uint64_t)(4*18*sizeof(double));
status = limeReaderReadData((double *)vbuf,&read_bytes, reader);
bswap_double(4*18,(double *)(vbuf));/* ILDG always big endian */
}
else if(prec==4){
read_bytes = (n_uint64_t)(4*18*sizeof(float));
status = limeReaderReadData((void *)vbuf_s,&read_bytes, reader);
bswap_float(4*18,(float *)(vbuf_s)); /* ILDG always big endian */
for (i=0;i<4;i++)
su3_copy_singletodouble((vbuf_s+i),(vbuf+i));
}
}
np[0]=it;
np[1]=ix;
np[2]=iy;
np[3]=iz;
n=ipr_global(np);
MPI_Barrier(MPI_COMM_WORLD);
if (n>0)
{
tag=mpi_tag();
if (my_rank==0)
MPI_Send((double*)(vbuf),4*18,MPI_DOUBLE,n,tag,
MPI_COMM_WORLD);
if (my_rank==n)
MPI_Recv((double*)(ubuf),4*18,MPI_DOUBLE,0,tag,
MPI_COMM_WORLD,&stat);
}
else if (my_rank==0)
for (l=0;l<(4);l++)
ubuf[l]=vbuf[l];
ixx = ((iy%L2)*L3 + (ix%L1)*L3*L2 + (it%L0)*L1*L2*L3);
if (my_rank==n)
set_links_ildg(ixx,iz);
}
}
}
}
plaq1=plaq_sum_dble()/(double)(6*NPROC*VOLUME);
message("Plaquette %f\n",plaq1);
message("Plaquette/3 %f\n",plaq1/3);
message("Please check consistency of average plaquette by hand\n");
eps=sqrt((double)(6*NPROC*VOLUME))*DBL_EPSILON;
}