Date: 2024-10-28T09:13:15+00:00

Actual source code: petsc-interface.c
slepc-3.22.1 2024-10-28
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      1: /* @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ */
      2: /* @@@ BLOPEX (version 1.1) LGPL Version 2.1 or above.See www.gnu.org. */
      3: /* @@@ Copyright 2010 BLOPEX team https://github.com/lobpcg/blopex     */
      4: /* @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ */
      5: /* This code was developed by Merico Argentati, Andrew Knyazev, Ilya Lashuk and Evgueni Ovtchinnikov */

      7: #include <slepcsys.h>
      8: #include <petscblaslapack.h>
      9: #include <interpreter.h>
     10: #include <temp_multivector.h>
     11: #include <fortran_matrix.h>
     12: #include "petsc-interface.h"

     14: static PetscRandom LOBPCG_RandomContext = NULL;

     16: #if !defined(PETSC_USE_COMPLEX)
     17: BlopexInt PETSC_dpotrf_interface (char *uplo,BlopexInt *n,double *a,BlopexInt * lda,BlopexInt *info)
     18: {
     19:   PetscBLASInt n_,lda_,info_;

     21:   /* type conversion */
     22:   n_ = *n;
     23:   lda_ = *lda;
     24:   info_ = *info;

     26:   LAPACKpotrf_(uplo,&n_,(PetscScalar*)a,&lda_,&info_);

     28:   *info = info_;
     29:   return 0;
     30: }

     32: BlopexInt PETSC_dsygv_interface (BlopexInt *itype,char *jobz,char *uplo,BlopexInt *n,double *a,BlopexInt *lda,double *b,BlopexInt *ldb,double *w,double *work,BlopexInt *lwork,BlopexInt *info)
     33: {
     34:   PetscBLASInt itype_,n_,lda_,ldb_,lwork_,info_;

     36:   itype_ = *itype;
     37:   n_ = *n;
     38:   lda_ = *lda;
     39:   ldb_ = *ldb;
     40:   lwork_ = *lwork;
     41:   info_ = *info;

     43:   LAPACKsygv_(&itype_,jobz,uplo,&n_,(PetscScalar*)a,&lda_,(PetscScalar*)b,&ldb_,(PetscScalar*)w,(PetscScalar*)work,&lwork_,&info_);

     45:   *info = info_;
     46:   return 0;
     47: }
     48: #else
     49: BlopexInt PETSC_zpotrf_interface (char *uplo,BlopexInt *n,komplex *a,BlopexInt* lda,BlopexInt *info)
     50: {
     51:   PetscBLASInt n_,lda_,info_;

     53:   /* type conversion */
     54:   n_ = *n;
     55:   lda_ = (PetscBLASInt)*lda;

     57:   LAPACKpotrf_(uplo,&n_,(PetscScalar*)a,&lda_,&info_);

     59:   *info = info_;
     60:   return 0;
     61: }

     63: BlopexInt PETSC_zsygv_interface (BlopexInt *itype,char *jobz,char *uplo,BlopexInt *n,komplex *a,BlopexInt *lda,komplex *b,BlopexInt *ldb,double *w,komplex *work,BlopexInt *lwork,double *rwork,BlopexInt *info)
     64: {
     65:   PetscBLASInt itype_,n_,lda_,ldb_,lwork_,info_;

     67:   itype_ = *itype;
     68:   n_ = *n;
     69:   lda_ = *lda;
     70:   ldb_ = *ldb;
     71:   lwork_ = *lwork;
     72:   info_ = *info;

     74:   LAPACKsygv_(&itype_,jobz,uplo,&n_,(PetscScalar*)a,&lda_,(PetscScalar*)b,&ldb_,(PetscReal*)w,(PetscScalar*)work,&lwork_,(PetscReal*)rwork,&info_);

     76:   *info = info_;
     77:   return 0;
     78: }
     79: #endif

     81: static void *PETSC_MimicVector(void *vvector)
     82: {
     83:   Vec temp;

     85:   PetscCallAbort(PETSC_COMM_SELF,VecDuplicate((Vec)vvector,&temp));
     86:   return (void*)temp;
     87: }

     89: static BlopexInt PETSC_DestroyVector(void *vvector)
     90: {
     91:   Vec v = (Vec)vvector;

     93:   PetscCall(VecDestroy(&v));
     94:   return 0;
     95: }

     97: static BlopexInt PETSC_InnerProd(void *x,void *y,void *result)
     98: {

    100:   PetscCall(VecDot((Vec)x,(Vec)y,(PetscScalar*)result));
    101:   return 0;
    102: }

    104: static BlopexInt PETSC_CopyVector(void *x,void *y)
    105: {

    107:   PetscCall(VecCopy((Vec)x,(Vec)y));
    108:   return 0;
    109: }

    111: static BlopexInt PETSC_ClearVector(void *x)
    112: {

    114:   PetscCall(VecSet((Vec)x,0.0));
    115:   return 0;
    116: }

    118: static BlopexInt PETSC_SetRandomValues(void* v,BlopexInt seed)
    119: {

    121:   /* note: without previous call to LOBPCG_InitRandomContext LOBPCG_RandomContext will be null,
    122:     and VecSetRandom will use internal petsc random context */

    124:   PetscCall(VecSetRandom((Vec)v,LOBPCG_RandomContext));
    125:   return 0;
    126: }

    128: static BlopexInt PETSC_ScaleVector(double alpha,void *x)
    129: {

    131:   PetscCall(VecScale((Vec)x,alpha));
    132:   return 0;
    133: }

    135: static BlopexInt PETSC_Axpy(void *alpha,void *x,void *y)
    136: {

    138:   PetscCall(VecAXPY((Vec)y,*(PetscScalar*)alpha,(Vec)x));
    139:   return 0;
    140: }

    142: static BlopexInt PETSC_VectorSize(void *x)
    143: {
    144:   PetscInt N;
    145:   (void)VecGetSize((Vec)x,&N);
    146:   return N;
    147: }

    149: int LOBPCG_InitRandomContext(MPI_Comm comm,PetscRandom rand)
    150: {
    151:   /* PetscScalar rnd_bound = 1.0; */

    153:   if (rand) {
    154:     PetscCall(PetscObjectReference((PetscObject)rand));
    155:     PetscCall(PetscRandomDestroy(&LOBPCG_RandomContext));
    156:     LOBPCG_RandomContext = rand;
    157:   } else PetscCall(PetscRandomCreate(comm,&LOBPCG_RandomContext));
    158:   return 0;
    159: }

    161: int LOBPCG_SetFromOptionsRandomContext(void)
    162: {
    163:   PetscCall(PetscRandomSetFromOptions(LOBPCG_RandomContext));

    165: #if defined(PETSC_USE_COMPLEX)
    166:   PetscCall(PetscRandomSetInterval(LOBPCG_RandomContext,(PetscScalar)PetscCMPLX(-1.0,-1.0),(PetscScalar)PetscCMPLX(1.0,1.0)));
    167: #else
    168:   PetscCall(PetscRandomSetInterval(LOBPCG_RandomContext,(PetscScalar)-1.0,(PetscScalar)1.0));
    169: #endif
    170:   return 0;
    171: }

    173: int LOBPCG_DestroyRandomContext(void)
    174: {

    176:   PetscCall(PetscRandomDestroy(&LOBPCG_RandomContext));
    177:   return 0;
    178: }

    180: int PETSCSetupInterpreter(mv_InterfaceInterpreter *i)
    181: {
    182:   i->CreateVector = PETSC_MimicVector;
    183:   i->DestroyVector = PETSC_DestroyVector;
    184:   i->InnerProd = PETSC_InnerProd;
    185:   i->CopyVector = PETSC_CopyVector;
    186:   i->ClearVector = PETSC_ClearVector;
    187:   i->SetRandomValues = PETSC_SetRandomValues;
    188:   i->ScaleVector = PETSC_ScaleVector;
    189:   i->Axpy = PETSC_Axpy;
    190:   i->VectorSize = PETSC_VectorSize;

    192:   /* Multivector part */

    194:   i->CreateMultiVector = mv_TempMultiVectorCreateFromSampleVector;
    195:   i->CopyCreateMultiVector = mv_TempMultiVectorCreateCopy;
    196:   i->DestroyMultiVector = mv_TempMultiVectorDestroy;

    198:   i->Width = mv_TempMultiVectorWidth;
    199:   i->Height = mv_TempMultiVectorHeight;
    200:   i->SetMask = mv_TempMultiVectorSetMask;
    201:   i->CopyMultiVector = mv_TempMultiVectorCopy;
    202:   i->ClearMultiVector = mv_TempMultiVectorClear;
    203:   i->SetRandomVectors = mv_TempMultiVectorSetRandom;
    204:   i->Eval = mv_TempMultiVectorEval;

    206: #if defined(PETSC_USE_COMPLEX)
    207:   i->MultiInnerProd = mv_TempMultiVectorByMultiVector_complex;
    208:   i->MultiInnerProdDiag = mv_TempMultiVectorByMultiVectorDiag_complex;
    209:   i->MultiVecMat = mv_TempMultiVectorByMatrix_complex;
    210:   i->MultiVecMatDiag = mv_TempMultiVectorByDiagonal_complex;
    211:   i->MultiAxpy = mv_TempMultiVectorAxpy_complex;
    212:   i->MultiXapy = mv_TempMultiVectorXapy_complex;
    213: #else
    214:   i->MultiInnerProd = mv_TempMultiVectorByMultiVector;
    215:   i->MultiInnerProdDiag = mv_TempMultiVectorByMultiVectorDiag;
    216:   i->MultiVecMat = mv_TempMultiVectorByMatrix;
    217:   i->MultiVecMatDiag = mv_TempMultiVectorByDiagonal;
    218:   i->MultiAxpy = mv_TempMultiVectorAxpy;
    219:   i->MultiXapy = mv_TempMultiVectorXapy;
    220: #endif

    222:   return 0;
    223: }