LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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lapacke_dgghrd_work.c
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1/*****************************************************************************
2 Copyright (c) 2014, Intel Corp.
3 All rights reserved.
4
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6 modification, are permitted provided that the following conditions are met:
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8 * Redistributions of source code must retain the above copyright notice,
9 this list of conditions and the following disclaimer.
10 * Redistributions in binary form must reproduce the above copyright
11 notice, this list of conditions and the following disclaimer in the
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13 * Neither the name of Intel Corporation nor the names of its contributors
14 may be used to endorse or promote products derived from this software
15 without specific prior written permission.
16
17 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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25 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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28*****************************************************************************
29* Contents: Native middle-level C interface to LAPACK function dgghrd
30* Author: Intel Corporation
31*****************************************************************************/
32
33#include "lapacke_utils.h"
34
35lapack_int LAPACKE_dgghrd_work( int matrix_layout, char compq, char compz,
37 double* a, lapack_int lda, double* b,
38 lapack_int ldb, double* q, lapack_int ldq,
39 double* z, lapack_int ldz )
40{
41 lapack_int info = 0;
42 if( matrix_layout == LAPACK_COL_MAJOR ) {
43 /* Call LAPACK function and adjust info */
44 LAPACK_dgghrd( &compq, &compz, &n, &ilo, &ihi, a, &lda, b, &ldb, q,
45 &ldq, z, &ldz, &info );
46 if( info < 0 ) {
47 info = info - 1;
48 }
49 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50 lapack_int lda_t = MAX(1,n);
51 lapack_int ldb_t = MAX(1,n);
52 lapack_int ldq_t = MAX(1,n);
53 lapack_int ldz_t = MAX(1,n);
54 double* a_t = NULL;
55 double* b_t = NULL;
56 double* q_t = NULL;
57 double* z_t = NULL;
58 /* Check leading dimension(s) */
59 if( lda < n ) {
60 info = -8;
61 LAPACKE_xerbla( "LAPACKE_dgghrd_work", info );
62 return info;
63 }
64 if( ldb < n ) {
65 info = -10;
66 LAPACKE_xerbla( "LAPACKE_dgghrd_work", info );
67 return info;
68 }
69 if( ldq < n ) {
70 info = -12;
71 LAPACKE_xerbla( "LAPACKE_dgghrd_work", info );
72 return info;
73 }
74 if( ldz < n ) {
75 info = -14;
76 LAPACKE_xerbla( "LAPACKE_dgghrd_work", info );
77 return info;
78 }
79 /* Allocate memory for temporary array(s) */
80 a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
81 if( a_t == NULL ) {
83 goto exit_level_0;
84 }
85 b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,n) );
86 if( b_t == NULL ) {
88 goto exit_level_1;
89 }
90 if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
91 q_t = (double*)LAPACKE_malloc( sizeof(double) * ldq_t * MAX(1,n) );
92 if( q_t == NULL ) {
94 goto exit_level_2;
95 }
96 }
97 if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
98 z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,n) );
99 if( z_t == NULL ) {
101 goto exit_level_3;
102 }
103 }
104 /* Transpose input matrices */
105 LAPACKE_dge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
106 LAPACKE_dge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
107 if( LAPACKE_lsame( compq, 'v' ) ) {
108 LAPACKE_dge_trans( matrix_layout, n, n, q, ldq, q_t, ldq_t );
109 }
110 if( LAPACKE_lsame( compz, 'v' ) ) {
111 LAPACKE_dge_trans( matrix_layout, n, n, z, ldz, z_t, ldz_t );
112 }
113 /* Call LAPACK function and adjust info */
114 LAPACK_dgghrd( &compq, &compz, &n, &ilo, &ihi, a_t, &lda_t, b_t, &ldb_t,
115 q_t, &ldq_t, z_t, &ldz_t, &info );
116 if( info < 0 ) {
117 info = info - 1;
118 }
119 /* Transpose output matrices */
120 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
121 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
122 if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
123 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
124 }
125 if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
126 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
127 }
128 /* Release memory and exit */
129 if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
130 LAPACKE_free( z_t );
131 }
132exit_level_3:
133 if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
134 LAPACKE_free( q_t );
135 }
136exit_level_2:
137 LAPACKE_free( b_t );
138exit_level_1:
139 LAPACKE_free( a_t );
140exit_level_0:
141 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
142 LAPACKE_xerbla( "LAPACKE_dgghrd_work", info );
143 }
144 } else {
145 info = -1;
146 LAPACKE_xerbla( "LAPACKE_dgghrd_work", info );
147 }
148 return info;
149}
#define lapack_int
Definition: lapack.h:87
#define LAPACK_dgghrd(...)
Definition: lapack.h:5119
#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_int LAPACKE_dgghrd_work(int matrix_layout, char compq, char compz, lapack_int n, lapack_int ilo, lapack_int ihi, double *a, lapack_int lda, double *b, lapack_int ldb, double *q, lapack_int ldq, double *z, lapack_int ldz)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)