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2 Copyright (c) 2014, Intel Corp.
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28 *****************************************************************************
29 * Contents: Native high-level C interface to LAPACK function sggevx
30 * Author: Intel Corporation
31 *****************************************************************************/
32
33 #include "lapacke_utils.h"
34
LAPACKE_sggevx(int matrix_layout,char balanc,char jobvl,char jobvr,char sense,lapack_int n,float * a,lapack_int lda,float * b,lapack_int ldb,float * alphar,float * alphai,float * beta,float * vl,lapack_int ldvl,float * vr,lapack_int ldvr,lapack_int * ilo,lapack_int * ihi,float * lscale,float * rscale,float * abnrm,float * bbnrm,float * rconde,float * rcondv)35 lapack_int LAPACKE_sggevx( int matrix_layout, char balanc, char jobvl,
36 char jobvr, char sense, lapack_int n, float* a,
37 lapack_int lda, float* b, lapack_int ldb,
38 float* alphar, float* alphai, float* beta, float* vl,
39 lapack_int ldvl, float* vr, lapack_int ldvr,
40 lapack_int* ilo, lapack_int* ihi, float* lscale,
41 float* rscale, float* abnrm, float* bbnrm,
42 float* rconde, float* rcondv )
43 {
44 lapack_int info = 0;
45 lapack_int lwork = -1;
46 lapack_logical* bwork = NULL;
47 lapack_int* iwork = NULL;
48 float* work = NULL;
49 float work_query;
50 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
51 LAPACKE_xerbla( "LAPACKE_sggevx", -1 );
52 return -1;
53 }
54 #ifndef LAPACK_DISABLE_NAN_CHECK
55 if( LAPACKE_get_nancheck() ) {
56 /* Optionally check input matrices for NaNs */
57 if( LAPACKE_sge_nancheck( matrix_layout, n, n, a, lda ) ) {
58 return -7;
59 }
60 if( LAPACKE_sge_nancheck( matrix_layout, n, n, b, ldb ) ) {
61 return -9;
62 }
63 }
64 #endif
65 /* Allocate memory for working array(s) */
66 if( LAPACKE_lsame( sense, 'b' ) || LAPACKE_lsame( sense, 'e' ) ||
67 LAPACKE_lsame( sense, 'v' ) ) {
68 bwork = (lapack_logical*)
69 LAPACKE_malloc( sizeof(lapack_logical) * MAX(1,n) );
70 if( bwork == NULL ) {
71 info = LAPACK_WORK_MEMORY_ERROR;
72 goto exit_level_0;
73 }
74 }
75 if( LAPACKE_lsame( sense, 'b' ) || LAPACKE_lsame( sense, 'n' ) ||
76 LAPACKE_lsame( sense, 'v' ) ) {
77 iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n+6) );
78 if( iwork == NULL ) {
79 info = LAPACK_WORK_MEMORY_ERROR;
80 goto exit_level_1;
81 }
82 }
83 /* Query optimal working array(s) size */
84 info = LAPACKE_sggevx_work( matrix_layout, balanc, jobvl, jobvr, sense, n, a,
85 lda, b, ldb, alphar, alphai, beta, vl, ldvl, vr,
86 ldvr, ilo, ihi, lscale, rscale, abnrm, bbnrm,
87 rconde, rcondv, &work_query, lwork, iwork,
88 bwork );
89 if( info != 0 ) {
90 goto exit_level_2;
91 }
92 lwork = (lapack_int)work_query;
93 /* Allocate memory for work arrays */
94 work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
95 if( work == NULL ) {
96 info = LAPACK_WORK_MEMORY_ERROR;
97 goto exit_level_2;
98 }
99 /* Call middle-level interface */
100 info = LAPACKE_sggevx_work( matrix_layout, balanc, jobvl, jobvr, sense, n, a,
101 lda, b, ldb, alphar, alphai, beta, vl, ldvl, vr,
102 ldvr, ilo, ihi, lscale, rscale, abnrm, bbnrm,
103 rconde, rcondv, work, lwork, iwork, bwork );
104 /* Release memory and exit */
105 LAPACKE_free( work );
106 exit_level_2:
107 if( LAPACKE_lsame( sense, 'b' ) || LAPACKE_lsame( sense, 'n' ) ||
108 LAPACKE_lsame( sense, 'v' ) ) {
109 LAPACKE_free( iwork );
110 }
111 exit_level_1:
112 if( LAPACKE_lsame( sense, 'b' ) || LAPACKE_lsame( sense, 'e' ) ||
113 LAPACKE_lsame( sense, 'v' ) ) {
114 LAPACKE_free( bwork );
115 }
116 exit_level_0:
117 if( info == LAPACK_WORK_MEMORY_ERROR ) {
118 LAPACKE_xerbla( "LAPACKE_sggevx", info );
119 }
120 return info;
121 }
122