LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_ssyevr()

lapack_int LAPACKE_ssyevr ( int  matrix_layout,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
float *  a,
lapack_int  lda,
float  vl,
float  vu,
lapack_int  il,
lapack_int  iu,
float  abstol,
lapack_int *  m,
float *  w,
float *  z,
lapack_int  ldz,
lapack_int *  isuppz 
)

Definition at line 35 of file lapacke_ssyevr.c.

40{
41 lapack_int info = 0;
42 lapack_int liwork = -1;
43 lapack_int lwork = -1;
44 lapack_int* iwork = NULL;
45 float* work = NULL;
46 lapack_int iwork_query;
47 float work_query;
48 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
49 LAPACKE_xerbla( "LAPACKE_ssyevr", -1 );
50 return -1;
51 }
52#ifndef LAPACK_DISABLE_NAN_CHECK
53 if( LAPACKE_get_nancheck() ) {
54 /* Optionally check input matrices for NaNs */
55 if( LAPACKE_ssy_nancheck( matrix_layout, uplo, n, a, lda ) ) {
56 return -6;
57 }
58 if( LAPACKE_s_nancheck( 1, &abstol, 1 ) ) {
59 return -12;
60 }
61 if( LAPACKE_lsame( range, 'v' ) ) {
62 if( LAPACKE_s_nancheck( 1, &vl, 1 ) ) {
63 return -8;
64 }
65 }
66 if( LAPACKE_lsame( range, 'v' ) ) {
67 if( LAPACKE_s_nancheck( 1, &vu, 1 ) ) {
68 return -9;
69 }
70 }
71 }
72#endif
73 /* Query optimal working array(s) size */
74 info = LAPACKE_ssyevr_work( matrix_layout, jobz, range, uplo, n, a, lda, vl,
75 vu, il, iu, abstol, m, w, z, ldz, isuppz,
76 &work_query, lwork, &iwork_query, liwork );
77 if( info != 0 ) {
78 goto exit_level_0;
79 }
80 liwork = iwork_query;
81 lwork = (lapack_int)work_query;
82 /* Allocate memory for work arrays */
83 iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
84 if( iwork == NULL ) {
85 info = LAPACK_WORK_MEMORY_ERROR;
86 goto exit_level_0;
87 }
88 work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
89 if( work == NULL ) {
90 info = LAPACK_WORK_MEMORY_ERROR;
91 goto exit_level_1;
92 }
93 /* Call middle-level interface */
94 info = LAPACKE_ssyevr_work( matrix_layout, jobz, range, uplo, n, a, lda, vl,
95 vu, il, iu, abstol, m, w, z, ldz, isuppz, work,
96 lwork, iwork, liwork );
97 /* Release memory and exit */
98 LAPACKE_free( work );
99exit_level_1:
100 LAPACKE_free( iwork );
101exit_level_0:
102 if( info == LAPACK_WORK_MEMORY_ERROR ) {
103 LAPACKE_xerbla( "LAPACKE_ssyevr", info );
104 }
105 return info;
106}
lapack_int
#define lapack_int
Definition: lapack.h:87
LAPACK_WORK_MEMORY_ERROR
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
LAPACK_COL_MAJOR
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
LAPACKE_free
#define LAPACKE_free(p)
Definition: lapacke.h:46
LAPACKE_ssyevr_work
lapack_int LAPACKE_ssyevr_work(int matrix_layout, char jobz, char range, char uplo, lapack_int n, float *a, lapack_int lda, float vl, float vu, lapack_int il, lapack_int iu, float abstol, lapack_int *m, float *w, float *z, lapack_int ldz, lapack_int *isuppz, float *work, lapack_int lwork, lapack_int *iwork, lapack_int liwork)
Definition: lapacke_ssyevr_work.c:35
LAPACK_ROW_MAJOR
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
LAPACKE_get_nancheck
int LAPACKE_get_nancheck(void)
Definition: lapacke_nancheck.c:42
LAPACKE_malloc
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
LAPACKE_lsame
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
LAPACKE_xerbla
void LAPACKE_xerbla(const char *name, lapack_int info)
Definition: lapacke_xerbla.c:36
LAPACKE_s_nancheck
lapack_logical LAPACKE_s_nancheck(lapack_int n, const float *x, lapack_int incx)
Definition: lapacke_s_nancheck.c:36
LAPACKE_ssy_nancheck
lapack_logical LAPACKE_ssy_nancheck(int matrix_layout, char uplo, lapack_int n, const float *a, lapack_int lda)
Definition: lapacke_ssy_nancheck.c:36
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