LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
lapack_int LAPACKE_zsysvx_work ( int  matrix_layout,
char  fact,
char  uplo,
lapack_int  n,
lapack_int  nrhs,
const lapack_complex_double *  a,
lapack_int  lda,
lapack_complex_double *  af,
lapack_int  ldaf,
lapack_int *  ipiv,
const lapack_complex_double *  b,
lapack_int  ldb,
lapack_complex_double *  x,
lapack_int  ldx,
double *  rcond,
double *  ferr,
double *  berr,
lapack_complex_double *  work,
lapack_int  lwork,
double *  rwork 
)

Definition at line 36 of file lapacke_zsysvx_work.c.

46 {
47  lapack_int info = 0;
48  if( matrix_layout == LAPACK_COL_MAJOR ) {
49  /* Call LAPACK function and adjust info */
50  LAPACK_zsysvx( &fact, &uplo, &n, &nrhs, a, &lda, af, &ldaf, ipiv, b,
51  &ldb, x, &ldx, rcond, ferr, berr, work, &lwork, rwork,
52  &info );
53  if( info < 0 ) {
54  info = info - 1;
55  }
56  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
57  lapack_int lda_t = MAX(1,n);
58  lapack_int ldaf_t = MAX(1,n);
59  lapack_int ldb_t = MAX(1,n);
60  lapack_int ldx_t = MAX(1,n);
61  lapack_complex_double* a_t = NULL;
62  lapack_complex_double* af_t = NULL;
63  lapack_complex_double* b_t = NULL;
64  lapack_complex_double* x_t = NULL;
65  /* Check leading dimension(s) */
66  if( lda < n ) {
67  info = -7;
68  LAPACKE_xerbla( "LAPACKE_zsysvx_work", info );
69  return info;
70  }
71  if( ldaf < n ) {
72  info = -9;
73  LAPACKE_xerbla( "LAPACKE_zsysvx_work", info );
74  return info;
75  }
76  if( ldb < nrhs ) {
77  info = -12;
78  LAPACKE_xerbla( "LAPACKE_zsysvx_work", info );
79  return info;
80  }
81  if( ldx < nrhs ) {
82  info = -14;
83  LAPACKE_xerbla( "LAPACKE_zsysvx_work", info );
84  return info;
85  }
86  /* Query optimal working array(s) size if requested */
87  if( lwork == -1 ) {
88  LAPACK_zsysvx( &fact, &uplo, &n, &nrhs, a, &lda_t, af, &ldaf_t,
89  ipiv, b, &ldb_t, x, &ldx_t, rcond, ferr, berr, work,
90  &lwork, rwork, &info );
91  return (info < 0) ? (info - 1) : info;
92  }
93  /* Allocate memory for temporary array(s) */
94  a_t = (lapack_complex_double*)
95  LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
96  if( a_t == NULL ) {
97  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
98  goto exit_level_0;
99  }
100  af_t = (lapack_complex_double*)
101  LAPACKE_malloc( sizeof(lapack_complex_double) * ldaf_t * MAX(1,n) );
102  if( af_t == NULL ) {
103  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
104  goto exit_level_1;
105  }
106  b_t = (lapack_complex_double*)
107  LAPACKE_malloc( sizeof(lapack_complex_double) *
108  ldb_t * MAX(1,nrhs) );
109  if( b_t == NULL ) {
110  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
111  goto exit_level_2;
112  }
113  x_t = (lapack_complex_double*)
114  LAPACKE_malloc( sizeof(lapack_complex_double) *
115  ldx_t * MAX(1,nrhs) );
116  if( x_t == NULL ) {
117  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
118  goto exit_level_3;
119  }
120  /* Transpose input matrices */
121  LAPACKE_zsy_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
122  if( LAPACKE_lsame( fact, 'f' ) ) {
123  LAPACKE_zsy_trans( matrix_layout, uplo, n, af, ldaf, af_t, ldaf_t );
124  }
125  LAPACKE_zge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
126  /* Call LAPACK function and adjust info */
127  LAPACK_zsysvx( &fact, &uplo, &n, &nrhs, a_t, &lda_t, af_t, &ldaf_t,
128  ipiv, b_t, &ldb_t, x_t, &ldx_t, rcond, ferr, berr, work,
129  &lwork, rwork, &info );
130  if( info < 0 ) {
131  info = info - 1;
132  }
133  /* Transpose output matrices */
134  if( LAPACKE_lsame( fact, 'n' ) ) {
135  LAPACKE_zsy_trans( LAPACK_COL_MAJOR, uplo, n, af_t, ldaf_t, af,
136  ldaf );
137  }
138  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
139  /* Release memory and exit */
140  LAPACKE_free( x_t );
141 exit_level_3:
142  LAPACKE_free( b_t );
143 exit_level_2:
144  LAPACKE_free( af_t );
145 exit_level_1:
146  LAPACKE_free( a_t );
147 exit_level_0:
148  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
149  LAPACKE_xerbla( "LAPACKE_zsysvx_work", info );
150  }
151  } else {
152  info = -1;
153  LAPACKE_xerbla( "LAPACKE_zsysvx_work", info );
154  }
155  return info;
156 }
LAPACK_zsysvx
void LAPACK_zsysvx(char *fact, char *uplo, lapack_int *n, lapack_int *nrhs, const lapack_complex_double *a, lapack_int *lda, lapack_complex_double *af, lapack_int *ldaf, lapack_int *ipiv, const lapack_complex_double *b, lapack_int *ldb, lapack_complex_double *x, lapack_int *ldx, double *rcond, double *ferr, double *berr, lapack_complex_double *work, lapack_int *lwork, double *rwork, lapack_int *info)
LAPACKE_zsy_trans
void LAPACKE_zsy_trans(int matrix_layout, char uplo, lapack_int n, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
Definition: lapacke_zsy_trans.c:40
LAPACK_ROW_MAJOR
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
lapack_complex_double
#define lapack_complex_double
Definition: lapacke.h:90
MAX
#define MAX(x, y)
Definition: lapacke_utils.h:47
LAPACKE_free
#define LAPACKE_free(p)
Definition: lapacke.h:113
LAPACKE_malloc
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
LAPACKE_lsame
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
LAPACK_COL_MAJOR
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
LAPACKE_xerbla
void LAPACKE_xerbla(const char *name, lapack_int info)
Definition: lapacke_xerbla.c:37
lapack_int
#define lapack_int
Definition: lapacke.h:47
LAPACK_TRANSPOSE_MEMORY_ERROR
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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:40

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