Date: 2022-03-31T15:29:42+00:00

Actual source code: fnimpl.h
slepc-3.17.0 2022-03-31
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      1: /*
      2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
      4:    Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain

      6:    This file is part of SLEPc.
      7:    SLEPc is distributed under a 2-clause BSD license (see LICENSE).
      8:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      9: */

     11: #if !defined(SLEPCFNIMPL_H)
     12: #define SLEPCFNIMPL_H

     14: #include <slepcfn.h>
     15: #include <slepc/private/slepcimpl.h>

     17: SLEPC_EXTERN PetscBool FNRegisterAllCalled;
     18: SLEPC_EXTERN PetscErrorCode FNRegisterAll(void);
     19: SLEPC_EXTERN PetscLogEvent FN_Evaluate;

     21: typedef struct _FNOps *FNOps;

     23: struct _FNOps {
     24:   PetscErrorCode (*evaluatefunction)(FN,PetscScalar,PetscScalar*);
     25:   PetscErrorCode (*evaluatederivative)(FN,PetscScalar,PetscScalar*);
     26:   PetscErrorCode (*evaluatefunctionmat[FN_MAX_SOLVE])(FN,Mat,Mat);
     27:   PetscErrorCode (*evaluatefunctionmatvec[FN_MAX_SOLVE])(FN,Mat,Vec);
     28:   PetscErrorCode (*setfromoptions)(PetscOptionItems*,FN);
     29:   PetscErrorCode (*view)(FN,PetscViewer);
     30:   PetscErrorCode (*duplicate)(FN,MPI_Comm,FN*);
     31:   PetscErrorCode (*destroy)(FN);
     32: };

     34: #define FN_MAX_W 6

     36: struct _p_FN {
     37:   PETSCHEADER(struct _FNOps);
     38:   /*------------------------- User parameters --------------------------*/
     39:   PetscScalar    alpha;          /* inner scaling (argument) */
     40:   PetscScalar    beta;           /* outer scaling (result) */
     41:   PetscInt       method;         /* the method to compute matrix functions */
     42:   FNParallelType pmode;          /* parallel mode (redundant or synchronized) */

     44:   /*---------------------- Cached data and workspace -------------------*/
     45:   Mat            W[FN_MAX_W];    /* workspace matrices */
     46:   PetscInt       nw;             /* number of allocated W matrices */
     47:   PetscInt       cw;             /* current W matrix */
     48:   void           *data;
     49: };

     51: /*
     52:   FN_AllocateWorkMat - Allocate a work Mat of the same dimension of A and copy
     53:   its contents. The work matrix is returned in M and should be freed with
     54:   FN_FreeWorkMat().
     55: */
     56: static inline PetscErrorCode FN_AllocateWorkMat(FN fn,Mat A,Mat *M)
     57: {
     58:   PetscInt       n,na;
     59:   PetscBool      create=PETSC_FALSE;

     61:   *M = NULL;
     63:   if (fn->nw<=fn->cw) {
     64:     create=PETSC_TRUE;
     65:     fn->nw++;
     66:   } else {
     67:     MatGetSize(fn->W[fn->cw],&n,NULL);
     68:     MatGetSize(A,&na,NULL);
     69:     if (n!=na) {
     70:       MatDestroy(&fn->W[fn->cw]);
     71:       create=PETSC_TRUE;
     72:     }
     73:   }
     74:   if (create) {
     75:     MatDuplicate(A,MAT_COPY_VALUES,&fn->W[fn->cw]);
     76:     PetscLogObjectParent((PetscObject)fn,(PetscObject)fn->W[fn->cw]);
     77:   } else MatCopy(A,fn->W[fn->cw],SAME_NONZERO_PATTERN);
     78:   *M = fn->W[fn->cw];
     79:   fn->cw++;
     80:   PetscFunctionReturn(0);
     81: }

     83: /*
     84:   FN_FreeWorkMat - Release a work matrix created with FN_AllocateWorkMat().
     85: */
     86: static inline PetscErrorCode FN_FreeWorkMat(FN fn,Mat *M)
     87: {
     89:   fn->cw--;
     91:   *M = NULL;
     92:   PetscFunctionReturn(0);
     93: }

     95: SLEPC_INTERN PetscErrorCode FNSqrtmSchur(FN,PetscBLASInt,PetscScalar*,PetscBLASInt,PetscBool);
     96: SLEPC_INTERN PetscErrorCode FNSqrtmDenmanBeavers(FN,PetscBLASInt,PetscScalar*,PetscBLASInt,PetscBool);
     97: SLEPC_INTERN PetscErrorCode FNSqrtmNewtonSchulz(FN,PetscBLASInt,PetscScalar*,PetscBLASInt,PetscBool);
     98: SLEPC_INTERN PetscErrorCode FNSqrtmSadeghi(FN,PetscBLASInt,PetscScalar*,PetscBLASInt);
     99: SLEPC_INTERN PetscErrorCode SlepcNormAm(PetscBLASInt,PetscScalar*,PetscInt,PetscScalar*,PetscRandom,PetscReal*);
    100: SLEPC_INTERN PetscErrorCode FNEvaluateFunctionMat_Private(FN,Mat,Mat,PetscBool);
    101: SLEPC_INTERN PetscErrorCode FNEvaluateFunctionMatVec_Private(FN,Mat,Vec,PetscBool);
    102: SLEPC_INTERN PetscErrorCode FNEvaluateFunctionMat_Exp_Higham(FN,Mat,Mat); /* used in FNPHI */
    103: #if defined(PETSC_HAVE_CUDA)
    104: SLEPC_INTERN PetscErrorCode FNSqrtmDenmanBeavers_CUDAm(FN,PetscBLASInt,PetscScalar*,PetscBLASInt,PetscBool);
    105: SLEPC_INTERN PetscErrorCode FNSqrtmNewtonSchulz_CUDA(FN,PetscBLASInt,PetscScalar*,PetscBLASInt,PetscBool);
    106: SLEPC_INTERN PetscErrorCode FNSqrtmSadeghi_CUDAm(FN,PetscBLASInt,PetscScalar*,PetscBLASInt);
    107: #endif

    109: #endif