LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cgbsvx_work()

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

Definition at line 36 of file lapacke_cgbsvx_work.c.

46 {
47  lapack_int info = 0;
48  if( matrix_layout == LAPACK_COL_MAJOR ) {
49  /* Call LAPACK function and adjust info */
50  LAPACK_cgbsvx( &fact, &trans, &n, &kl, &ku, &nrhs, ab, &ldab, afb,
51  &ldafb, ipiv, equed, r, c, b, &ldb, x, &ldx, rcond, ferr,
52  berr, work, rwork, &info );
53  if( info < 0 ) {
54  info = info - 1;
55  }
56  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
57  lapack_int ldab_t = MAX(1,kl+ku+1);
58  lapack_int ldafb_t = MAX(1,2*kl+ku+1);
59  lapack_int ldb_t = MAX(1,n);
60  lapack_int ldx_t = MAX(1,n);
61  lapack_complex_float* ab_t = NULL;
62  lapack_complex_float* afb_t = NULL;
63  lapack_complex_float* b_t = NULL;
64  lapack_complex_float* x_t = NULL;
65  /* Check leading dimension(s) */
66  if( ldab < n ) {
67  info = -9;
68  LAPACKE_xerbla( "LAPACKE_cgbsvx_work", info );
69  return info;
70  }
71  if( ldafb < n ) {
72  info = -11;
73  LAPACKE_xerbla( "LAPACKE_cgbsvx_work", info );
74  return info;
75  }
76  if( ldb < nrhs ) {
77  info = -17;
78  LAPACKE_xerbla( "LAPACKE_cgbsvx_work", info );
79  return info;
80  }
81  if( ldx < nrhs ) {
82  info = -19;
83  LAPACKE_xerbla( "LAPACKE_cgbsvx_work", info );
84  return info;
85  }
86  /* Allocate memory for temporary array(s) */
87  ab_t = (lapack_complex_float*)
88  LAPACKE_malloc( sizeof(lapack_complex_float) * ldab_t * MAX(1,n) );
89  if( ab_t == NULL ) {
91  goto exit_level_0;
92  }
93  afb_t = (lapack_complex_float*)
94  LAPACKE_malloc( sizeof(lapack_complex_float) * ldafb_t * MAX(1,n) );
95  if( afb_t == NULL ) {
97  goto exit_level_1;
98  }
99  b_t = (lapack_complex_float*)
101  ldb_t * MAX(1,nrhs) );
102  if( b_t == NULL ) {
104  goto exit_level_2;
105  }
106  x_t = (lapack_complex_float*)
108  ldx_t * MAX(1,nrhs) );
109  if( x_t == NULL ) {
111  goto exit_level_3;
112  }
113  /* Transpose input matrices */
114  LAPACKE_cgb_trans( matrix_layout, n, n, kl, ku, ab, ldab, ab_t, ldab_t );
115  if( LAPACKE_lsame( fact, 'f' ) ) {
116  LAPACKE_cgb_trans( matrix_layout, n, n, kl, kl+ku, afb, ldafb, afb_t,
117  ldafb_t );
118  }
119  LAPACKE_cge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
120  /* Call LAPACK function and adjust info */
121  LAPACK_cgbsvx( &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_cgb_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_cgb_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_cge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
140  }
141  LAPACKE_cge_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_cgbsvx_work", info );
153  }
154  } else {
155  info = -1;
156  LAPACKE_xerbla( "LAPACKE_cgbsvx_work", info );
157  }
158  return info;
159 }
void LAPACKE_cge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *in, lapack_int ldin, lapack_complex_float *out, lapack_int ldout)
void LAPACK_cgbsvx(char *fact, char *trans, lapack_int *n, lapack_int *kl, lapack_int *ku, lapack_int *nrhs, lapack_complex_float *ab, lapack_int *ldab, lapack_complex_float *afb, lapack_int *ldafb, lapack_int *ipiv, char *equed, float *r, float *c, lapack_complex_float *b, lapack_int *ldb, lapack_complex_float *x, lapack_int *ldx, float *rcond, float *ferr, float *berr, lapack_complex_float *work, float *rwork, lapack_int *info)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_float
Definition: lapacke.h:74
void LAPACKE_cgb_trans(int matrix_layout, lapack_int m, lapack_int n, lapack_int kl, lapack_int ku, const lapack_complex_float *in, lapack_int ldin, lapack_complex_float *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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