sizes.h

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#pragma once
#ifdef   __USE_MKL__
#define  USE_BLAS
#include <mkl.h>
#elif (defined AMD_BLAS||defined OPENBLAS)
#define  USE_BLAS
#include <cblas.h>
#elif defined GSL_BLAS
#define  USE_BLAS
#include <gsl/gsl_cblas.h>
#endif
#ifdef   USE_GPU
#include <cuda.h>
#include <cuda_runtime_api.h>
#include <cublas_v2.h>
extern cublasHandle_t cublas_handle;
extern cublasStatus_t cublas_status;
extern cudaMemPool_t mempool;
#define cudaDeviceSynchronise() cudaDeviceSynchronize()
#endif
#ifdef __CUDACC__
#include <thrust_complex.h>
#include <thrust/reduce.h>
#include <thrust/device_vector.h>
#else
#include <complex.h>
#define  Complex_f   float complex
#define  Complex     double complex
#endif

#define  FILELEN  64
// Common block definition for parallel variables

#define  nx 24
#if(nx<1)
#error "nx is expected it to be greater than or equal to 1"
#endif
 
// Keep original restriction of single spatial extent

#define  ny    nx
#if(ny<1)
#error "ny is expected it to be greater than or equal to 1"
#endif

#define  nz    nx
#if(nz<1)
#error "nz is expected it to be greater than or equal to 1"
#endif

#define  nt 24
#if(nt<1)
#error "nt is expected it to be greater than or equal to 1"
#endif

#define  gvol    (nx*ny*nz*nt)
#define  gvol3   (nx*ny*nz)

#define  npx   1
#if(npx<1)
#error "npx is expected it to be greater than or equal to 1"
#elif(nx%npx!=0)
#error "npx should be a divisor of nx"
#endif
 
// Initially restrict to npz = npy = npx
// This allows us to have a single ksize variable

#define  npy   npx
#if(npy<1)
#error "npy is expected it to be greater than or equal to 1"
#elif(ny%npy!=0)
#error "npy should be a divisor of ny"
#endif

#define  npz   npx
#if(npz<1)
#error "npz is expected it to be greater than or equal to 1"
#elif(nz%npz!=0)
#error "npz should be a divisor of nz"
#endif

#define  npt   1
#if(npt<1)
#error "npt is expected it to be greater than or equal to 1"
#elif(nt%npt!=0)
#error "npt should be a divisor of nt"
#endif

#define  nproc (npx*npy*npz*npt)
#if (defined USE_GPU && nproc>1)
#error   "Multi-GPU is not yet supported"
#endif

#define  nthreads 8
 
//    Existing parameter definitions.
#define  ksizex   (nx/npx)
#define  ksizey   (ny/npy)
#define  ksizez   (nz/npz)

#define  ksize ksizex

#define  ksizet   (nt/npt)
#define  nf 1

#define  kvol  (ksizet*ksizez*ksizey*ksizex)
#define  kvol3 (ksizez*ksizey*ksizex)
 
//     integer, parameter :: niterc=2*gvol  
//      #define niterc 2*gvol
//    jis: hard limit to avoid runaway trajectories
#if   (nx*ny*nz*nt<=16384)
#define  niterc   gvol
#elif (nx>=(3*nt)/2)
#define  niterc   gvol3
#else
#define  niterc   (gvol/4)
#endif
//    Constants for dimensions.
#define  nc 2
#define  nadj  3
#define  ndirac   4
#define  ndim  4
#define  ngorkov  8

#define  kmom  (ndim*nadj*kvol)
#define  kferm (nc*ngorkov*kvol)
#define  kferm2   (nc*ndirac*kvol)
#if(npx>1)
#define  halox (ksizey*ksizez*ksizet)
#else
#define  halox 0
#endif
#if(npy>1)
#define  haloy (ksizex*ksizez*ksizet)
#else
#define  haloy 0
#endif
#if(npz>1)
#define  haloz (ksizex*ksizey*ksizet)
#else
#define  haloz 0
#endif
#if(npt>1)
#define  halot (ksizex*ksizey*ksizez)
#else
#define  halot 0
#endif
#define  halo  (2*(halox+haloy+haloz+halot))

#define  kvolHalo    (kvol+halo)
#define  kfermHalo   (nc*ngorkov*kvolHalo)
#define  kferm2Halo  (nc*ndirac*kvolHalo)
#define  kmomHalo (ndim*nadj*kvolHalo)
 
//    These all used to be multipled by kferm or kferm2 at the start of Congradq or Congradp
//    On 20240516 in Room 2.19 of the Lloyd building of Trinity we copped that doing so means that the residue is larger
//    if running on a smaller number of cores. In the extreme GPU case the subvolume is the entire volume so the residue
//    can be several orders of magnitude larger than in the smallest sublattice case.
//    Instead, we rescale all the default residues here by sqrt(kferm) or sqrt(kferm2). No matter what size sublattice
//    we use now, the residue will match that of a 2^3X4 sublattice used in the earlier FORTRAN runs
#define  respbp   3.2E-5
#define  rescgg   2.26E-5 
#define  rescga   2.26E-8 
 
 
#ifdef   __AVX512F__
#ifdef __unix__
#warning AVX512 detected
#elif (defined WIN32||_WIN32)
#pragma message("AVX512 detected")
#endif
#define  AVX   64
#elif defined  __AVX__
#ifdef __unix__
#warning AVX or AVX2 detected
#elif (defined WIN32||_WIN32)
#pragma message("AVX or AVX2 detected")
#endif
#define  AVX   32
#else
#ifdef __unix__
#warning No AVX detected, assuming SSE is present
#elif (defined WIN32||_WIN32)
#pragma message("No AVX detected, assuming SSE is present")
#endif
#define  AVX   16
#endif
 
#ifdef   USE_GPU
extern dim3 dimBlock;
extern dim3 dimGrid;
extern dim3 dimBlockOne;
extern dim3 dimGridOne;
#define  USE_BLAS
#endif