GCC Code Coverage Report

Directory: ./
File: src/sys/classes/ds/impls/ghep/dsghep.c
Date: 2025-10-04 04:19:13
Exec Total Coverage
Lines: 132 144 91.7%
Functions: 8 8 100.0%
Branches: 439 833 52.7%
Line Branch Exec Source
1 /*
2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3 SLEPc - Scalable Library for Eigenvalue Problem Computations
4 Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain
5
6 This file is part of SLEPc.
7 SLEPc is distributed under a 2-clause BSD license (see LICENSE).
8 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
9 */
10
11 #include <slepc/private/dsimpl.h>
12 #include <slepcblaslapack.h>
13
14 342 static PetscErrorCode DSAllocate_GHEP(DS ds,PetscInt ld)
15 {
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 342 PetscFunctionBegin;
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 342 PetscCall(DSAllocateMat_Private(ds,DS_MAT_A));
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 342 PetscCall(DSAllocateMat_Private(ds,DS_MAT_B));
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 342 PetscCall(DSAllocateMat_Private(ds,DS_MAT_Q));
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 342 PetscCall(PetscFree(ds->perm));
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 342 PetscCall(PetscMalloc1(ld,&ds->perm));
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 68 PetscFunctionReturn(PETSC_SUCCESS);
23 }
24
25 10 static PetscErrorCode DSView_GHEP(DS ds,PetscViewer viewer)
26 {
27 10 PetscViewerFormat format;
28
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 10 PetscFunctionBegin;
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 10 PetscCall(PetscViewerGetFormat(viewer,&format));
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 10 if (format == PETSC_VIEWER_ASCII_INFO || format == PETSC_VIEWER_ASCII_INFO_DETAIL) PetscFunctionReturn(PETSC_SUCCESS);
32 ✗ PetscCall(DSViewMat(ds,viewer,DS_MAT_A));
33 ✗ PetscCall(DSViewMat(ds,viewer,DS_MAT_B));
34 ✗ if (ds->state>DS_STATE_INTERMEDIATE) PetscCall(DSViewMat(ds,viewer,DS_MAT_Q));
35 ✗ if (ds->omat[DS_MAT_X]) PetscCall(DSViewMat(ds,viewer,DS_MAT_X));
36 ✗ PetscFunctionReturn(PETSC_SUCCESS);
37 }
38
39 15748 static PetscErrorCode DSVectors_GHEP(DS ds,DSMatType mat,PetscInt *j,PetscReal *rnorm)
40 {
41 15748 PetscScalar *Z;
42 15748 const PetscScalar *Q;
43 15748 PetscInt ld = ds->ld;
44
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 15748 PetscFunctionBegin;
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 15748 PetscCheck(!rnorm,PetscObjectComm((PetscObject)ds),PETSC_ERR_SUP,"Not implemented yet");
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 15748 switch (mat) {
48 15748 case DS_MAT_X:
49 case DS_MAT_Y:
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 15748 if (j) {
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 10 PetscCall(MatDenseGetArray(ds->omat[mat],&Z));
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 10 if (ds->state>=DS_STATE_CONDENSED) {
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 10 PetscCall(MatDenseGetArrayRead(ds->omat[DS_MAT_Q],&Q));
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 10 PetscCall(PetscArraycpy(Z+(*j)*ld,Q+(*j)*ld,ld));
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 10 PetscCall(MatDenseRestoreArrayRead(ds->omat[DS_MAT_Q],&Q));
56 } else {
57 ✗ PetscCall(PetscArrayzero(Z+(*j)*ld,ld));
58 ✗ Z[(*j)+(*j)*ld] = 1.0;
59 }
60
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 10 PetscCall(MatDenseRestoreArray(ds->omat[mat],&Z));
61 } else {
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 15738 if (ds->state>=DS_STATE_CONDENSED) PetscCall(MatCopy(ds->omat[DS_MAT_Q],ds->omat[mat],SAME_NONZERO_PATTERN));
63 ✗ else PetscCall(DSSetIdentity(ds,mat));
64 }
65 3237 break;
66 ✗ case DS_MAT_U:
67 case DS_MAT_V:
68 ✗ SETERRQ(PetscObjectComm((PetscObject)ds),PETSC_ERR_SUP,"Not implemented yet");
69 ✗ default:
70 ✗ SETERRQ(PetscObjectComm((PetscObject)ds),PETSC_ERR_ARG_OUTOFRANGE,"Invalid mat parameter");
71 }
72
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 3237 PetscFunctionReturn(PETSC_SUCCESS);
73 }
74
75 15640 static PetscErrorCode DSSort_GHEP(DS ds,PetscScalar *wr,PetscScalar *wi,PetscScalar *rr,PetscScalar *ri,PetscInt *k)
76 {
77 15640 PetscInt n,l,i,*perm,ld=ds->ld;
78 15640 PetscScalar *A;
79
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 15640 PetscFunctionBegin;
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 15640 if (!ds->sc) PetscFunctionReturn(PETSC_SUCCESS);
82 15640 n = ds->n;
83 15640 l = ds->l;
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 15640 PetscCall(MatDenseGetArray(ds->omat[DS_MAT_A],&A));
85 15640 perm = ds->perm;
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 164160 for (i=l;i<n;i++) wr[i] = A[i+i*ld];
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 15640 if (rr) PetscCall(DSSortEigenvalues_Private(ds,rr,ri,perm,PETSC_FALSE));
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 15542 else PetscCall(DSSortEigenvalues_Private(ds,wr,NULL,perm,PETSC_FALSE));
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 164160 for (i=l;i<n;i++) A[i+i*ld] = wr[perm[i]];
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 164160 for (i=l;i<n;i++) wr[i] = A[i+i*ld];
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 15640 PetscCall(MatDenseRestoreArray(ds->omat[DS_MAT_A],&A));
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 15640 PetscCall(DSPermuteColumns_Private(ds,l,n,n,DS_MAT_Q,perm));
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 3217 PetscFunctionReturn(PETSC_SUCCESS);
94 }
95
96 15640 static PetscErrorCode DSSolve_GHEP(DS ds,PetscScalar *wr,PetscScalar *wi)
97 {
98 15640 PetscScalar *work,*A,*B,*Q;
99 15640 PetscBLASInt itype = 1,*iwork,info,n1,liwork,ld,lrwork=0,lwork;
100 15640 PetscInt off,i;
101 #if defined(PETSC_USE_COMPLEX)
102 7087 PetscReal *rwork,*rr;
103 #endif
104
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 15640 PetscFunctionBegin;
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 15640 PetscCall(PetscBLASIntCast(ds->n-ds->l,&n1));
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 15640 PetscCall(PetscBLASIntCast(ds->ld,&ld));
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 15640 PetscCall(PetscBLASIntCast(5*ds->n+3,&liwork));
109 #if defined(PETSC_USE_COMPLEX)
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 7087 PetscCall(PetscBLASIntCast(ds->n*ds->n+2*ds->n,&lwork));
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 7087 PetscCall(PetscBLASIntCast(2*ds->n*ds->n+5*ds->n+1+n1,&lrwork));
112 #else
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 8553 PetscCall(PetscBLASIntCast(2*ds->n*ds->n+6*ds->n+1,&lwork));
114 #endif
115
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 15640 PetscCall(DSAllocateWork_Private(ds,lwork,lrwork,liwork));
116 15640 work = ds->work;
117 15640 iwork = ds->iwork;
118 15640 off = ds->l+ds->l*ld;
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 15640 PetscCall(MatDenseGetArray(ds->omat[DS_MAT_A],&A));
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 15640 PetscCall(MatDenseGetArray(ds->omat[DS_MAT_B],&B));
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 15640 PetscCall(MatDenseGetArray(ds->omat[DS_MAT_Q],&Q));
122 #if defined(PETSC_USE_COMPLEX)
123 7087 rr = ds->rwork;
124 7087 rwork = ds->rwork+n1;
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 7087 PetscCall(PetscBLASIntCast(ds->lrwork-n1,&lrwork));
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 7087 PetscCallBLAS("LAPACKsygvd",LAPACKsygvd_(&itype,"V","U",&n1,A+off,&ld,B+off,&ld,rr,work,&lwork,rwork,&lrwork,iwork,&liwork,&info));
127
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 76767 for (i=0;i<n1;i++) wr[ds->l+i] = rr[i];
128 #else
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 8553 PetscCallBLAS("LAPACKsygvd",LAPACKsygvd_(&itype,"V","U",&n1,A+off,&ld,B+off,&ld,wr+ds->l,work,&lwork,iwork,&liwork,&info));
130 #endif
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 15640 SlepcCheckLapackInfo("sygvd",info);
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 15640 PetscCall(PetscArrayzero(Q+ds->l*ld,n1*ld));
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 164160 for (i=ds->l;i<ds->n;i++) PetscCall(PetscArraycpy(Q+ds->l+i*ld,A+ds->l+i*ld,n1));
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 15640 PetscCall(PetscArrayzero(B+ds->l*ld,n1*ld));
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 15640 PetscCall(PetscArrayzero(A+ds->l*ld,n1*ld));
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 164160 for (i=ds->l;i<ds->n;i++) {
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 148520 if (wi) wi[i] = 0.0;
138 148520 B[i+i*ld] = 1.0;
139 148520 A[i+i*ld] = wr[i];
140 }
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 15640 PetscCall(MatDenseRestoreArray(ds->omat[DS_MAT_A],&A));
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 15640 PetscCall(MatDenseRestoreArray(ds->omat[DS_MAT_B],&B));
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 15640 PetscCall(MatDenseRestoreArray(ds->omat[DS_MAT_Q],&Q));
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 3217 PetscFunctionReturn(PETSC_SUCCESS);
145 }
146
147 #if !defined(PETSC_HAVE_MPIUNI)
148 730 static PetscErrorCode DSSynchronize_GHEP(DS ds,PetscScalar eigr[],PetscScalar eigi[])
149 {
150 730 PetscScalar *A,*B,*Q;
151 730 PetscInt ld=ds->ld,l=ds->l,k;
152 730 PetscMPIInt n,rank,off=0,size,ldn;
153
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 730 PetscFunctionBegin;
155 730 k = 2*(ds->n-l)*ld;
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 730 if (ds->state>DS_STATE_RAW) k += (ds->n-l)*ld;
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 730 if (eigr) k += (ds->n-l);
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 730 PetscCall(DSAllocateWork_Private(ds,k,0,0));
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 730 PetscCall(PetscMPIIntCast(k*sizeof(PetscScalar),&size));
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 730 PetscCall(PetscMPIIntCast(ds->n-l,&n));
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 730 PetscCall(PetscMPIIntCast(ld*(ds->n-l),&ldn));
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 730 PetscCall(MatDenseGetArray(ds->omat[DS_MAT_A],&A));
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 730 PetscCall(MatDenseGetArray(ds->omat[DS_MAT_B],&B));
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 730 if (ds->state>DS_STATE_RAW) PetscCall(MatDenseGetArray(ds->omat[DS_MAT_Q],&Q));
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 730 PetscCallMPI(MPI_Comm_rank(PetscObjectComm((PetscObject)ds),&rank));
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 730 if (!rank) {
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 365 PetscCallMPI(MPI_Pack(A+l*ld,ldn,MPIU_SCALAR,ds->work,size,&off,PetscObjectComm((PetscObject)ds)));
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 365 PetscCallMPI(MPI_Pack(B+l*ld,ldn,MPIU_SCALAR,ds->work,size,&off,PetscObjectComm((PetscObject)ds)));
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 365 if (ds->state>DS_STATE_RAW) PetscCallMPI(MPI_Pack(Q+l*ld,ldn,MPIU_SCALAR,ds->work,size,&off,PetscObjectComm((PetscObject)ds)));
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 365 if (eigr) PetscCallMPI(MPI_Pack(eigr+l,n,MPIU_SCALAR,ds->work,size,&off,PetscObjectComm((PetscObject)ds)));
171 }
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 1460 PetscCallMPI(MPI_Bcast(ds->work,size,MPI_BYTE,0,PetscObjectComm((PetscObject)ds)));
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 730 if (rank) {
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 365 PetscCallMPI(MPI_Unpack(ds->work,size,&off,A+l*ld,ldn,MPIU_SCALAR,PetscObjectComm((PetscObject)ds)));
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 365 PetscCallMPI(MPI_Unpack(ds->work,size,&off,B+l*ld,ldn,MPIU_SCALAR,PetscObjectComm((PetscObject)ds)));
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 365 if (ds->state>DS_STATE_RAW) PetscCallMPI(MPI_Unpack(ds->work,size,&off,Q+l*ld,ldn,MPIU_SCALAR,PetscObjectComm((PetscObject)ds)));
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 365 if (eigr) PetscCallMPI(MPI_Unpack(ds->work,size,&off,eigr+l,n,MPIU_SCALAR,PetscObjectComm((PetscObject)ds)));
178 }
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 730 PetscCall(MatDenseRestoreArray(ds->omat[DS_MAT_A],&A));
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 730 PetscCall(MatDenseRestoreArray(ds->omat[DS_MAT_B],&B));
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 730 if (ds->state>DS_STATE_RAW) PetscCall(MatDenseRestoreArray(ds->omat[DS_MAT_Q],&Q));
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 146 PetscFunctionReturn(PETSC_SUCCESS);
183 }
184 #endif
185
186 46628 static PetscErrorCode DSHermitian_GHEP(DS ds,DSMatType m,PetscBool *flg)
187 {
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 46628 PetscFunctionBegin;
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 46628 if (m==DS_MAT_A || m==DS_MAT_B) *flg = PETSC_TRUE;
190 15718 else *flg = PETSC_FALSE;
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 46628 PetscFunctionReturn(PETSC_SUCCESS);
192 }
193
194 /*MC
195 DSGHEP - Dense Generalized Hermitian Eigenvalue Problem.
196
197 Level: beginner
198
199 Notes:
200 The problem is expressed as A*X = B*X*Lambda, where both A and B are
201 real symmetric (or complex Hermitian) and B is positive-definite. Lambda
202 is a diagonal matrix whose diagonal elements are the arguments of DSSolve().
203 After solve, A is overwritten with Lambda, and B is overwritten with I.
204
205 No intermediate state is implemented, nor compact storage.
206
207 Used DS matrices:
208 + DS_MAT_A - first problem matrix
209 . DS_MAT_B - second problem matrix
210 - DS_MAT_Q - matrix of B-orthogonal eigenvectors, which is equal to X
211
212 Implemented methods:
213 . 0 - Divide and Conquer (_sygvd)
214
215 .seealso: DSCreate(), DSSetType(), DSType
216 M*/
217 342 SLEPC_EXTERN PetscErrorCode DSCreate_GHEP(DS ds)
218 {
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 342 PetscFunctionBegin;
220 342 ds->ops->allocate = DSAllocate_GHEP;
221 342 ds->ops->view = DSView_GHEP;
222 342 ds->ops->vectors = DSVectors_GHEP;
223 342 ds->ops->solve[0] = DSSolve_GHEP;
224 342 ds->ops->sort = DSSort_GHEP;
225 #if !defined(PETSC_HAVE_MPIUNI)
226 342 ds->ops->synchronize = DSSynchronize_GHEP;
227 #endif
228 342 ds->ops->hermitian = DSHermitian_GHEP;
229
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 342 PetscFunctionReturn(PETSC_SUCCESS);
230 }
231