#include <../src/mat/impls/baij/seq/baij.h> PetscErrorCode MatSolveTranspose_SeqBAIJ_4_NaturalOrdering_inplace(Mat A,Vec bb,Vec xx) { Mat_SeqBAIJ *a=(Mat_SeqBAIJ*)A->data; PetscErrorCode ierr; const PetscInt *diag=a->diag,n=a->mbs,*vi,*ai=a->i,*aj=a->j; PetscInt i,nz,idx,idt,oidx; const MatScalar *aa=a->a,*v; PetscScalar s1,s2,s3,s4,x1,x2,x3,x4,*x; PetscFunctionBegin; ierr = VecCopy(bb,xx);CHKERRQ(ierr); ierr = VecGetArray(xx,&x);CHKERRQ(ierr); /* forward solve the U^T */ idx = 0; for (i=0; i=0; i--) { v = aa + 16*diag[i] - 16; vi = aj + diag[i] - 1; nz = diag[i] - ai[i]; idt = 4*i; s1 = x[idt]; s2 = x[1+idt]; s3 = x[2+idt];s4 = x[3+idt]; while (nz--) { idx = 4*(*vi--); x[idx] -= v[0]*s1 + v[1]*s2 + v[2]*s3 + v[3]*s4; x[idx+1] -= v[4]*s1 + v[5]*s2 + v[6]*s3 + v[7]*s4; x[idx+2] -= v[8]*s1 + v[9]*s2 + v[10]*s3 + v[11]*s4; x[idx+3] -= v[12]*s1 + v[13]*s2 + v[14]*s3 + v[15]*s4; v -= 16; } } ierr = VecRestoreArray(xx,&x);CHKERRQ(ierr); ierr = PetscLogFlops(2.0*16*(a->nz) - 4.0*A->cmap->n);CHKERRQ(ierr); PetscFunctionReturn(0); } PetscErrorCode MatSolveTranspose_SeqBAIJ_4_NaturalOrdering(Mat A,Vec bb,Vec xx) { Mat_SeqBAIJ *a=(Mat_SeqBAIJ*)A->data; PetscErrorCode ierr; const PetscInt n=a->mbs,*vi,*ai=a->i,*aj=a->j,*diag=a->diag; PetscInt nz,idx,idt,j,i,oidx; const PetscInt bs =A->rmap->bs,bs2=a->bs2; const MatScalar *aa=a->a,*v; PetscScalar s1,s2,s3,s4,x1,x2,x3,x4,*x; PetscFunctionBegin; ierr = VecCopy(bb,xx);CHKERRQ(ierr); ierr = VecGetArray(xx,&x);CHKERRQ(ierr); /* forward solve the U^T */ idx = 0; for (i=0; i-nz; j--) { oidx = bs*vi[j]; x[oidx] -= v[0]*s1 + v[1]*s2 + v[2]*s3 + v[3]*s4; x[oidx+1] -= v[4]*s1 + v[5]*s2 + v[6]*s3 + v[7]*s4; x[oidx+2] -= v[8]*s1 + v[9]*s2 + v[10]*s3 + v[11]*s4; x[oidx+3] -= v[12]*s1 + v[13]*s2 + v[14]*s3 + v[15]*s4; v -= bs2; } x[idx] = s1;x[1+idx] = s2; x[2+idx] = s3; x[3+idx] = s4; idx += bs; } /* backward solve the L^T */ for (i=n-1; i>=0; i--) { v = aa + bs2*ai[i]; vi = aj + ai[i]; nz = ai[i+1] - ai[i]; idt = bs*i; s1 = x[idt]; s2 = x[1+idt]; s3 = x[2+idt]; s4 = x[3+idt]; for (j=0; jnz) - bs*A->cmap->n);CHKERRQ(ierr); PetscFunctionReturn(0); }