LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sgesvx_work()

lapack_int LAPACKE_sgesvx_work ( int  matrix_layout,
char  fact,
char  trans,
lapack_int  n,
lapack_int  nrhs,
float *  a,
lapack_int  lda,
float *  af,
lapack_int  ldaf,
lapack_int ipiv,
char *  equed,
float *  r,
float *  c,
float *  b,
lapack_int  ldb,
float *  x,
lapack_int  ldx,
float *  rcond,
float *  ferr,
float *  berr,
float *  work,
lapack_int iwork 
)

Definition at line 36 of file lapacke_sgesvx_work.c.

43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_sgesvx( &fact, &trans, &n, &nrhs, a, &lda, af, &ldaf, ipiv,
48  equed, r, c, b, &ldb, x, &ldx, rcond, ferr, berr, work,
49  iwork, &info );
50  if( info < 0 ) {
51  info = info - 1;
52  }
53  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
54  lapack_int lda_t = MAX(1,n);
55  lapack_int ldaf_t = MAX(1,n);
56  lapack_int ldb_t = MAX(1,n);
57  lapack_int ldx_t = MAX(1,n);
58  float* a_t = NULL;
59  float* af_t = NULL;
60  float* b_t = NULL;
61  float* x_t = NULL;
62  /* Check leading dimension(s) */
63  if( lda < n ) {
64  info = -7;
65  LAPACKE_xerbla( "LAPACKE_sgesvx_work", info );
66  return info;
67  }
68  if( ldaf < n ) {
69  info = -9;
70  LAPACKE_xerbla( "LAPACKE_sgesvx_work", info );
71  return info;
72  }
73  if( ldb < nrhs ) {
74  info = -15;
75  LAPACKE_xerbla( "LAPACKE_sgesvx_work", info );
76  return info;
77  }
78  if( ldx < nrhs ) {
79  info = -17;
80  LAPACKE_xerbla( "LAPACKE_sgesvx_work", info );
81  return info;
82  }
83  /* Allocate memory for temporary array(s) */
84  a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
85  if( a_t == NULL ) {
87  goto exit_level_0;
88  }
89  af_t = (float*)LAPACKE_malloc( sizeof(float) * ldaf_t * MAX(1,n) );
90  if( af_t == NULL ) {
92  goto exit_level_1;
93  }
94  b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
95  if( b_t == NULL ) {
97  goto exit_level_2;
98  }
99  x_t = (float*)LAPACKE_malloc( sizeof(float) * ldx_t * MAX(1,nrhs) );
100  if( x_t == NULL ) {
102  goto exit_level_3;
103  }
104  /* Transpose input matrices */
105  LAPACKE_sge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
106  if( LAPACKE_lsame( fact, 'f' ) ) {
107  LAPACKE_sge_trans( matrix_layout, n, n, af, ldaf, af_t, ldaf_t );
108  }
109  LAPACKE_sge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
110  /* Call LAPACK function and adjust info */
111  LAPACK_sgesvx( &fact, &trans, &n, &nrhs, a_t, &lda_t, af_t, &ldaf_t,
112  ipiv, equed, r, c, b_t, &ldb_t, x_t, &ldx_t, rcond, ferr,
113  berr, work, iwork, &info );
114  if( info < 0 ) {
115  info = info - 1;
116  }
117  /* Transpose output matrices */
118  if( LAPACKE_lsame( fact, 'e' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
119  LAPACKE_lsame( *equed, 'c' ) || LAPACKE_lsame( *equed, 'r' ) ) ) {
120  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
121  }
122  if( LAPACKE_lsame( fact, 'e' ) || LAPACKE_lsame( fact, 'n' ) ) {
123  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, af_t, ldaf_t, af, ldaf );
124  }
125  if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
126  LAPACKE_lsame( *equed, 'c' ) || LAPACKE_lsame( *equed, 'r' ) ) ) {
127  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
128  }
129  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
130  /* Release memory and exit */
131  LAPACKE_free( x_t );
132 exit_level_3:
133  LAPACKE_free( b_t );
134 exit_level_2:
135  LAPACKE_free( af_t );
136 exit_level_1:
137  LAPACKE_free( a_t );
138 exit_level_0:
139  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
140  LAPACKE_xerbla( "LAPACKE_sgesvx_work", info );
141  }
142  } else {
143  info = -1;
144  LAPACKE_xerbla( "LAPACKE_sgesvx_work", info );
145  }
146  return info;
147 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
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: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
void LAPACK_sgesvx(char *fact, char *trans, lapack_int *n, lapack_int *nrhs, float *a, lapack_int *lda, float *af, lapack_int *ldaf, lapack_int *ipiv, char *equed, float *r, float *c, float *b, lapack_int *ldb, float *x, lapack_int *ldx, float *rcond, float *ferr, float *berr, float *work, lapack_int *iwork, lapack_int *info)
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