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lapacke_ssteqr_work.c File Reference
#include "lapacke_utils.h"

Go to the source code of this file.

Functions

lapack_int LAPACKE_ssteqr_work (int matrix_layout, char compz, lapack_int n, float *d, float *e, float *z, lapack_int ldz, float *work)

Function Documentation

◆ LAPACKE_ssteqr_work()

lapack_int LAPACKE_ssteqr_work ( int matrix_layout,
char compz,
lapack_int n,
float * d,
float * e,
float * z,
lapack_int ldz,
float * work )

Definition at line 35 of file lapacke_ssteqr_work.c.

38{
39 lapack_int info = 0;
40 if( matrix_layout == LAPACK_COL_MAJOR ) {
41 /* Call LAPACK function and adjust info */
42 LAPACK_ssteqr( &compz, &n, d, e, z, &ldz, work, &info );
43 if( info < 0 ) {
44 info = info - 1;
45 }
46 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
47 lapack_int ldz_t = MAX(1,n);
48 float* z_t = NULL;
49 /* Check leading dimension(s) */
50 if( ldz < n ) {
51 info = -7;
52 LAPACKE_xerbla( "LAPACKE_ssteqr_work", info );
53 return info;
54 }
55 /* Allocate memory for temporary array(s) */
56 if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
57 z_t = (float*)LAPACKE_malloc( sizeof(float) * ldz_t * MAX(1,n) );
58 if( z_t == NULL ) {
60 goto exit_level_0;
61 }
62 }
63 /* Transpose input matrices */
64 if( LAPACKE_lsame( compz, 'v' ) ) {
65 LAPACKE_sge_trans( matrix_layout, n, n, z, ldz, z_t, ldz_t );
66 }
67 /* Call LAPACK function and adjust info */
68 LAPACK_ssteqr( &compz, &n, d, e, z_t, &ldz_t, work, &info );
69 if( info < 0 ) {
70 info = info - 1;
71 }
72 /* Transpose output matrices */
73 if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
74 LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
75 }
76 /* Release memory and exit */
77 if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
78 LAPACKE_free( z_t );
79 }
80exit_level_0:
81 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
82 LAPACKE_xerbla( "LAPACKE_ssteqr_work", info );
83 }
84 } else {
85 info = -1;
86 LAPACKE_xerbla( "LAPACKE_ssteqr_work", info );
87 }
88 return info;
89}
#define lapack_int
Definition lapack.h:83
#define LAPACK_ssteqr(...)
Definition lapack.h:16487
#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
lapack_logical LAPACKE_lsame(char ca, char cb)
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)
n