1: /*
  2:   Defines matrix-matrix-matrix product routines for SeqAIJ matrices
  3:           D = A * B * C
  4: */
  5: #include <../src/mat/impls/aij/seq/aij.h>

  7: PetscErrorCode MatDestroy_SeqAIJ_MatMatMatMult(void* data)
  8: {
  9:   Mat_MatMatMatMult *matmatmatmult = (Mat_MatMatMatMult*)data;
 10:   PetscErrorCode    ierr;

 13:   MatDestroy(&matmatmatmult->BC);
 14:   PetscFree(matmatmatmult);
 15:   return(0);
 16: }

 18: PetscErrorCode MatMatMatMultSymbolic_SeqAIJ_SeqAIJ_SeqAIJ(Mat A,Mat B,Mat C,PetscReal fill,Mat D)
 19: {
 20:   PetscErrorCode    ierr;
 21:   Mat               BC;
 22:   Mat_MatMatMatMult *matmatmatmult;
 23:   char              *alg;

 26:   MatCheckProduct(D,5);
 27:   if (D->product->data) SETERRQ(PetscObjectComm((PetscObject)D),PETSC_ERR_PLIB,"Product data not empty");
 28:   MatCreate(PETSC_COMM_SELF,&BC);
 29:   MatMatMultSymbolic_SeqAIJ_SeqAIJ(B,C,fill,BC);

 31:   PetscStrallocpy(D->product->alg,&alg);
 32:   MatProductSetAlgorithm(D,"sorted"); /* set alg for D = A*BC */
 33:   MatMatMultSymbolic_SeqAIJ_SeqAIJ(A,BC,fill,D);
 34:   MatProductSetAlgorithm(D,alg); /* resume original algorithm */
 35:   PetscFree(alg);

 37:   /* create struct Mat_MatMatMatMult and attached it to D */
 38:   if (D->product->data) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Not yet coded");
 39:   PetscNew(&matmatmatmult);
 40:   matmatmatmult->BC   = BC;
 41:   D->product->data    = matmatmatmult;
 42:   D->product->destroy = MatDestroy_SeqAIJ_MatMatMatMult;

 44:   D->ops->matmatmultnumeric = MatMatMatMultNumeric_SeqAIJ_SeqAIJ_SeqAIJ;
 45:   return(0);
 46: }

 48: PetscErrorCode MatMatMatMultNumeric_SeqAIJ_SeqAIJ_SeqAIJ(Mat A,Mat B,Mat C,Mat D)
 49: {
 50:   PetscErrorCode    ierr;
 51:   Mat_MatMatMatMult *matmatmatmult;
 52:   Mat               BC;

 55:   MatCheckProduct(D,4);
 56:   if (!D->product->data) SETERRQ(PetscObjectComm((PetscObject)D),PETSC_ERR_PLIB,"Product data empty");
 57:   matmatmatmult = (Mat_MatMatMatMult*)D->product->data;
 58:   BC = matmatmatmult->BC;
 59:   if (!BC) SETERRQ(PetscObjectComm((PetscObject)D),PETSC_ERR_PLIB,"Missing BC mat");
 60:   if (!BC->ops->matmultnumeric) SETERRQ(PetscObjectComm((PetscObject)BC),PETSC_ERR_PLIB,"Missing numeric operation");
 61:   (*BC->ops->matmultnumeric)(B,C,BC);
 62:   if (!D->ops->matmultnumeric) SETERRQ(PetscObjectComm((PetscObject)D),PETSC_ERR_PLIB,"Missing numeric operation");
 63:   (*D->ops->matmultnumeric)(A,BC,D);
 64:   return(0);
 65: }