LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sggev_work()

lapack_int LAPACKE_sggev_work ( int  matrix_layout,
char  jobvl,
char  jobvr,
lapack_int  n,
float *  a,
lapack_int  lda,
float *  b,
lapack_int  ldb,
float *  alphar,
float *  alphai,
float *  beta,
float *  vl,
lapack_int  ldvl,
float *  vr,
lapack_int  ldvr,
float *  work,
lapack_int  lwork 
)

Definition at line 35 of file lapacke_sggev_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_sggev( &jobvl, &jobvr, &n, a, &lda, b, &ldb, alphar, alphai,
46  beta, vl, &ldvl, vr, &ldvr, work, &lwork, &info );
47  if( info < 0 ) {
48  info = info - 1;
49  }
50  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
51  lapack_int nrows_vl = LAPACKE_lsame( jobvl, 'v' ) ? n : 1;
52  lapack_int ncols_vl = LAPACKE_lsame( jobvl, 'v' ) ? n : 1;
53  lapack_int nrows_vr = LAPACKE_lsame( jobvr, 'v' ) ? n : 1;
54  lapack_int ncols_vr = LAPACKE_lsame( jobvr, 'v' ) ? n : 1;
55  lapack_int lda_t = MAX(1,n);
56  lapack_int ldb_t = MAX(1,n);
57  lapack_int ldvl_t = MAX(1,nrows_vl);
58  lapack_int ldvr_t = MAX(1,nrows_vr);
59  float* a_t = NULL;
60  float* b_t = NULL;
61  float* vl_t = NULL;
62  float* vr_t = NULL;
63  /* Check leading dimension(s) */
64  if( lda < n ) {
65  info = -6;
66  LAPACKE_xerbla( "LAPACKE_sggev_work", info );
67  return info;
68  }
69  if( ldb < n ) {
70  info = -8;
71  LAPACKE_xerbla( "LAPACKE_sggev_work", info );
72  return info;
73  }
74  if( ldvl < ncols_vl ) {
75  info = -13;
76  LAPACKE_xerbla( "LAPACKE_sggev_work", info );
77  return info;
78  }
79  if( ldvr < ncols_vr ) {
80  info = -15;
81  LAPACKE_xerbla( "LAPACKE_sggev_work", info );
82  return info;
83  }
84  /* Query optimal working array(s) size if requested */
85  if( lwork == -1 ) {
86  LAPACK_sggev( &jobvl, &jobvr, &n, a, &lda_t, b, &ldb_t, alphar,
87  alphai, beta, vl, &ldvl_t, vr, &ldvr_t, work, &lwork,
88  &info );
89  return (info < 0) ? (info - 1) : info;
90  }
91  /* Allocate memory for temporary array(s) */
92  a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
93  if( a_t == NULL ) {
95  goto exit_level_0;
96  }
97  b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,n) );
98  if( b_t == NULL ) {
100  goto exit_level_1;
101  }
102  if( LAPACKE_lsame( jobvl, 'v' ) ) {
103  vl_t = (float*)
104  LAPACKE_malloc( sizeof(float) * ldvl_t * MAX(1,ncols_vl) );
105  if( vl_t == NULL ) {
107  goto exit_level_2;
108  }
109  }
110  if( LAPACKE_lsame( jobvr, 'v' ) ) {
111  vr_t = (float*)
112  LAPACKE_malloc( sizeof(float) * ldvr_t * MAX(1,ncols_vr) );
113  if( vr_t == NULL ) {
115  goto exit_level_3;
116  }
117  }
118  /* Transpose input matrices */
119  LAPACKE_sge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
120  LAPACKE_sge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
121  /* Call LAPACK function and adjust info */
122  LAPACK_sggev( &jobvl, &jobvr, &n, a_t, &lda_t, b_t, &ldb_t, alphar,
123  alphai, beta, vl_t, &ldvl_t, vr_t, &ldvr_t, work, &lwork,
124  &info );
125  if( info < 0 ) {
126  info = info - 1;
127  }
128  /* Transpose output matrices */
129  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
130  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
131  if( LAPACKE_lsame( jobvl, 'v' ) ) {
132  LAPACKE_sge_trans( LAPACK_COL_MAJOR, nrows_vl, ncols_vl, vl_t,
133  ldvl_t, vl, ldvl );
134  }
135  if( LAPACKE_lsame( jobvr, 'v' ) ) {
136  LAPACKE_sge_trans( LAPACK_COL_MAJOR, nrows_vr, ncols_vr, vr_t,
137  ldvr_t, vr, ldvr );
138  }
139  /* Release memory and exit */
140  if( LAPACKE_lsame( jobvr, 'v' ) ) {
141  LAPACKE_free( vr_t );
142  }
143 exit_level_3:
144  if( LAPACKE_lsame( jobvl, 'v' ) ) {
145  LAPACKE_free( vl_t );
146  }
147 exit_level_2:
148  LAPACKE_free( b_t );
149 exit_level_1:
150  LAPACKE_free( a_t );
151 exit_level_0:
152  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
153  LAPACKE_xerbla( "LAPACKE_sggev_work", info );
154  }
155  } else {
156  info = -1;
157  LAPACKE_xerbla( "LAPACKE_sggev_work", info );
158  }
159  return info;
160 }
#define LAPACK_sggev(...)
Definition: lapack.h:4706
#define lapack_int
Definition: lapack.h:83
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
void LAPACKE_sge_trans(int matrix_layout, lapack_int m, lapack_int n, const float *in, lapack_int ldin, float *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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