LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_sgehrd_work()

lapack_int LAPACKE_sgehrd_work ( int  matrix_layout,
lapack_int  n,
lapack_int  ilo,
lapack_int  ihi,
float *  a,
lapack_int  lda,
float *  tau,
float *  work,
lapack_int  lwork 
)

Definition at line 35 of file lapacke_sgehrd_work.c.

38{
39 lapack_int info = 0;
40 if( matrix_layout == LAPACK_COL_MAJOR ) {
41 /* Call LAPACK function and adjust info */
42 LAPACK_sgehrd( &n, &ilo, &ihi, a, &lda, tau, work, &lwork, &info );
43 if( info < 0 ) {
44 info = info - 1;
45 }
46 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
47 lapack_int lda_t = MAX(1,n);
48 float* a_t = NULL;
49 /* Check leading dimension(s) */
50 if( lda < n ) {
51 info = -6;
52 LAPACKE_xerbla( "LAPACKE_sgehrd_work", info );
53 return info;
54 }
55 /* Query optimal working array(s) size if requested */
56 if( lwork == -1 ) {
57 LAPACK_sgehrd( &n, &ilo, &ihi, a, &lda_t, tau, work, &lwork,
58 &info );
59 return (info < 0) ? (info - 1) : info;
60 }
61 /* Allocate memory for temporary array(s) */
62 a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
63 if( a_t == NULL ) {
65 goto exit_level_0;
66 }
67 /* Transpose input matrices */
68 LAPACKE_sge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
69 /* Call LAPACK function and adjust info */
70 LAPACK_sgehrd( &n, &ilo, &ihi, a_t, &lda_t, tau, work, &lwork, &info );
71 if( info < 0 ) {
72 info = info - 1;
73 }
74 /* Transpose output matrices */
75 LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
76 /* Release memory and exit */
77 LAPACKE_free( a_t );
78exit_level_0:
79 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
80 LAPACKE_xerbla( "LAPACKE_sgehrd_work", info );
81 }
82 } else {
83 info = -1;
84 LAPACKE_xerbla( "LAPACKE_sgehrd_work", info );
85 }
86 return info;
87}
#define LAPACK_sgehrd
Definition: lapack.h:2008
#define lapack_int
Definition: lapack.h:87
#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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