LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_sgtsvx_work()

lapack_int LAPACKE_sgtsvx_work ( int  matrix_layout,
char  fact,
char  trans,
lapack_int  n,
lapack_int  nrhs,
const float *  dl,
const float *  d,
const float *  du,
float *  dlf,
float *  df,
float *  duf,
float *  du2,
lapack_int ipiv,
const float *  b,
lapack_int  ldb,
float *  x,
lapack_int  ldx,
float *  rcond,
float *  ferr,
float *  berr,
float *  work,
lapack_int iwork 
)

Definition at line 35 of file lapacke_sgtsvx_work.c.

43{
44 lapack_int info = 0;
45 if( matrix_layout == LAPACK_COL_MAJOR ) {
46 /* Call LAPACK function and adjust info */
47 LAPACK_sgtsvx( &fact, &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2,
48 ipiv, b, &ldb, x, &ldx, rcond, ferr, berr, work, iwork,
49 &info );
50 if( info < 0 ) {
51 info = info - 1;
52 }
53 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
54 lapack_int ldb_t = MAX(1,n);
55 lapack_int ldx_t = MAX(1,n);
56 float* b_t = NULL;
57 float* x_t = NULL;
58 /* Check leading dimension(s) */
59 if( ldb < nrhs ) {
60 info = -15;
61 LAPACKE_xerbla( "LAPACKE_sgtsvx_work", info );
62 return info;
63 }
64 if( ldx < nrhs ) {
65 info = -17;
66 LAPACKE_xerbla( "LAPACKE_sgtsvx_work", info );
67 return info;
68 }
69 /* Allocate memory for temporary array(s) */
70 b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
71 if( b_t == NULL ) {
73 goto exit_level_0;
74 }
75 x_t = (float*)LAPACKE_malloc( sizeof(float) * ldx_t * MAX(1,nrhs) );
76 if( x_t == NULL ) {
78 goto exit_level_1;
79 }
80 /* Transpose input matrices */
81 LAPACKE_sge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
82 /* Call LAPACK function and adjust info */
83 LAPACK_sgtsvx( &fact, &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2,
84 ipiv, b_t, &ldb_t, x_t, &ldx_t, rcond, ferr, berr, work,
85 iwork, &info );
86 if( info < 0 ) {
87 info = info - 1;
88 }
89 /* Transpose output matrices */
90 LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
91 /* Release memory and exit */
92 LAPACKE_free( x_t );
93exit_level_1:
94 LAPACKE_free( b_t );
95exit_level_0:
96 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
97 LAPACKE_xerbla( "LAPACKE_sgtsvx_work", info );
98 }
99 } else {
100 info = -1;
101 LAPACKE_xerbla( "LAPACKE_sgtsvx_work", info );
102 }
103 return info;
104}
#define lapack_int
Definition: lapack.h:87
#define LAPACK_sgtsvx(...)
Definition: lapack.h:5986
#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
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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