LAPACK  3.9.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zgbsvx_work()

lapack_int LAPACKE_zgbsvx_work ( int  matrix_layout,
char  fact,
char  trans,
lapack_int  n,
lapack_int  kl,
lapack_int  ku,
lapack_int  nrhs,
lapack_complex_double *  ab,
lapack_int  ldab,
lapack_complex_double *  afb,
lapack_int  ldafb,
lapack_int *  ipiv,
char *  equed,
double *  r,
double *  c,
lapack_complex_double *  b,
lapack_int  ldb,
lapack_complex_double *  x,
lapack_int  ldx,
double *  rcond,
double *  ferr,
double *  berr,
lapack_complex_double *  work,
double *  rwork 
)

Definition at line 35 of file lapacke_zgbsvx_work.c.

45 {
46  lapack_int info = 0;
47  if( matrix_layout == LAPACK_COL_MAJOR ) {
48  /* Call LAPACK function and adjust info */
49  LAPACK_zgbsvx( &fact, &trans, &n, &kl, &ku, &nrhs, ab, &ldab, afb,
50  &ldafb, ipiv, equed, r, c, b, &ldb, x, &ldx, rcond, ferr,
51  berr, work, rwork, &info );
52  if( info < 0 ) {
53  info = info - 1;
54  }
55  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
56  lapack_int ldab_t = MAX(1,kl+ku+1);
57  lapack_int ldafb_t = MAX(1,2*kl+ku+1);
58  lapack_int ldb_t = MAX(1,n);
59  lapack_int ldx_t = MAX(1,n);
60  lapack_complex_double* ab_t = NULL;
61  lapack_complex_double* afb_t = NULL;
62  lapack_complex_double* b_t = NULL;
63  lapack_complex_double* x_t = NULL;
64  /* Check leading dimension(s) */
65  if( ldab < n ) {
66  info = -9;
67  LAPACKE_xerbla( "LAPACKE_zgbsvx_work", info );
68  return info;
69  }
70  if( ldafb < n ) {
71  info = -11;
72  LAPACKE_xerbla( "LAPACKE_zgbsvx_work", info );
73  return info;
74  }
75  if( ldb < nrhs ) {
76  info = -17;
77  LAPACKE_xerbla( "LAPACKE_zgbsvx_work", info );
78  return info;
79  }
80  if( ldx < nrhs ) {
81  info = -19;
82  LAPACKE_xerbla( "LAPACKE_zgbsvx_work", info );
83  return info;
84  }
85  /* Allocate memory for temporary array(s) */
86  ab_t = (lapack_complex_double*)
87  LAPACKE_malloc( sizeof(lapack_complex_double) * ldab_t * MAX(1,n) );
88  if( ab_t == NULL ) {
89  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
90  goto exit_level_0;
91  }
92  afb_t = (lapack_complex_double*)
93  LAPACKE_malloc( sizeof(lapack_complex_double) *
94  ldafb_t * MAX(1,n) );
95  if( afb_t == NULL ) {
96  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
97  goto exit_level_1;
98  }
99  b_t = (lapack_complex_double*)
100  LAPACKE_malloc( sizeof(lapack_complex_double) *
101  ldb_t * MAX(1,nrhs) );
102  if( b_t == NULL ) {
103  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
104  goto exit_level_2;
105  }
106  x_t = (lapack_complex_double*)
107  LAPACKE_malloc( sizeof(lapack_complex_double) *
108  ldx_t * MAX(1,nrhs) );
109  if( x_t == NULL ) {
110  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
111  goto exit_level_3;
112  }
113  /* Transpose input matrices */
114  LAPACKE_zgb_trans( matrix_layout, n, n, kl, ku, ab, ldab, ab_t, ldab_t );
115  if( LAPACKE_lsame( fact, 'f' ) ) {
116  LAPACKE_zgb_trans( matrix_layout, n, n, kl, kl+ku, afb, ldafb, afb_t,
117  ldafb_t );
118  }
119  LAPACKE_zge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
120  /* Call LAPACK function and adjust info */
121  LAPACK_zgbsvx( &fact, &trans, &n, &kl, &ku, &nrhs, ab_t, &ldab_t, afb_t,
122  &ldafb_t, ipiv, equed, r, c, b_t, &ldb_t, x_t, &ldx_t,
123  rcond, ferr, berr, work, rwork, &info );
124  if( info < 0 ) {
125  info = info - 1;
126  }
127  /* Transpose output matrices */
128  if( LAPACKE_lsame( fact, 'e' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
129  LAPACKE_lsame( *equed, 'c' ) || LAPACKE_lsame( *equed, 'r' ) ) ) {
130  LAPACKE_zgb_trans( LAPACK_COL_MAJOR, n, n, kl, ku, ab_t, ldab_t, ab,
131  ldab );
132  }
133  if( LAPACKE_lsame( fact, 'e' ) || LAPACKE_lsame( fact, 'n' ) ) {
134  LAPACKE_zgb_trans( LAPACK_COL_MAJOR, n, n, kl, kl+ku, afb_t,
135  ldafb_t, afb, ldafb );
136  }
137  if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
138  LAPACKE_lsame( *equed, 'c' ) || LAPACKE_lsame( *equed, 'r' ) ) ) {
139  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
140  }
141  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
142  /* Release memory and exit */
143  LAPACKE_free( x_t );
144 exit_level_3:
145  LAPACKE_free( b_t );
146 exit_level_2:
147  LAPACKE_free( afb_t );
148 exit_level_1:
149  LAPACKE_free( ab_t );
150 exit_level_0:
151  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
152  LAPACKE_xerbla( "LAPACKE_zgbsvx_work", info );
153  }
154  } else {
155  info = -1;
156  LAPACKE_xerbla( "LAPACKE_zgbsvx_work", info );
157  }
158  return info;
159 }
LAPACK_zgbsvx
void LAPACK_zgbsvx(char const *fact, char const *trans, lapack_int const *n, lapack_int const *kl, lapack_int const *ku, lapack_int const *nrhs, lapack_complex_double *AB, lapack_int const *ldab, lapack_complex_double *AFB, lapack_int const *ldafb, lapack_int *ipiv, char *equed, double *R, double *C, lapack_complex_double *B, lapack_int const *ldb, lapack_complex_double *X, lapack_int const *ldx, double *rcond, double *ferr, double *berr, lapack_complex_double *work, double *rwork, lapack_int *info)
lapack_int
#define lapack_int
Definition: lapack.h:83
lapack_complex_double
#define lapack_complex_double
Definition: lapack.h:63
LAPACK_COL_MAJOR
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
LAPACKE_free
#define LAPACKE_free(p)
Definition: lapacke.h:46
LAPACK_ROW_MAJOR
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
LAPACKE_malloc
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
LAPACK_TRANSPOSE_MEMORY_ERROR
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
LAPACKE_lsame
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
LAPACKE_xerbla
void LAPACKE_xerbla(const char *name, lapack_int info)
Definition: lapacke_xerbla.c:36
LAPACKE_zge_trans
void LAPACKE_zge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
Definition: lapacke_zge_trans.c:39
LAPACKE_zgb_trans
void LAPACKE_zgb_trans(int matrix_layout, lapack_int m, lapack_int n, lapack_int kl, lapack_int ku, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
Definition: lapacke_zgb_trans.c:39
MAX
#define MAX(x, y)
Definition: lapacke_utils.h:46
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