LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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lapacke_cgesvd_work.c
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1/*****************************************************************************
2 Copyright (c) 2014, Intel Corp.
3 All rights reserved.
4
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are met:
7
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
12 documentation and/or other materials provided with the distribution.
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
20 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
21 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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25 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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27 THE POSSIBILITY OF SUCH DAMAGE.
28*****************************************************************************
29* Contents: Native middle-level C interface to LAPACK function cgesvd
30* Author: Intel Corporation
31*****************************************************************************/
32
33#include "lapacke_utils.h"
34
35lapack_int LAPACKE_cgesvd_work( int matrix_layout, char jobu, char jobvt,
38 float* s, lapack_complex_float* u,
41 lapack_int lwork, float* rwork )
42{
43 lapack_int info = 0;
44 if( matrix_layout == LAPACK_COL_MAJOR ) {
45 /* Call LAPACK function and adjust info */
46 LAPACK_cgesvd( &jobu, &jobvt, &m, &n, a, &lda, s, u, &ldu, vt, &ldvt,
47 work, &lwork, rwork, &info );
48 if( info < 0 ) {
49 info = info - 1;
50 }
51 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52 lapack_int nrows_u = ( LAPACKE_lsame( jobu, 'a' ) ||
53 LAPACKE_lsame( jobu, 's' ) ) ? m : 1;
54 lapack_int ncols_u = LAPACKE_lsame( jobu, 'a' ) ? m :
55 ( LAPACKE_lsame( jobu, 's' ) ? MIN(m,n) : 1);
56 lapack_int nrows_vt = LAPACKE_lsame( jobvt, 'a' ) ? n :
57 ( LAPACKE_lsame( jobvt, 's' ) ? MIN(m,n) : 1);
58 lapack_int ncols_vt = ( LAPACKE_lsame( jobvt, 'a' ) ||
59 LAPACKE_lsame( jobvt, 's' ) ) ? n : 1;
60 lapack_int lda_t = MAX(1,m);
61 lapack_int ldu_t = MAX(1,nrows_u);
62 lapack_int ldvt_t = MAX(1,nrows_vt);
63 lapack_complex_float* a_t = NULL;
64 lapack_complex_float* u_t = NULL;
65 lapack_complex_float* vt_t = NULL;
66 /* Check leading dimension(s) */
67 if( lda < n ) {
68 info = -7;
69 LAPACKE_xerbla( "LAPACKE_cgesvd_work", info );
70 return info;
71 }
72 if( ldu < ncols_u ) {
73 info = -10;
74 LAPACKE_xerbla( "LAPACKE_cgesvd_work", info );
75 return info;
76 }
77 if( ldvt < ncols_vt ) {
78 info = -12;
79 LAPACKE_xerbla( "LAPACKE_cgesvd_work", info );
80 return info;
81 }
82 /* Query optimal working array(s) size if requested */
83 if( lwork == -1 ) {
84 LAPACK_cgesvd( &jobu, &jobvt, &m, &n, a, &lda_t, s, u, &ldu_t, vt,
85 &ldvt_t, work, &lwork, rwork, &info );
86 return (info < 0) ? (info - 1) : info;
87 }
88 /* Allocate memory for temporary array(s) */
90 LAPACKE_malloc( sizeof(lapack_complex_float) * lda_t * MAX(1,n) );
91 if( a_t == NULL ) {
93 goto exit_level_0;
94 }
95 if( LAPACKE_lsame( jobu, 'a' ) || LAPACKE_lsame( jobu, 's' ) ) {
98 ldu_t * MAX(1,ncols_u) );
99 if( u_t == NULL ) {
101 goto exit_level_1;
102 }
103 }
104 if( LAPACKE_lsame( jobvt, 'a' ) || LAPACKE_lsame( jobvt, 's' ) ) {
105 vt_t = (lapack_complex_float*)
107 ldvt_t * MAX(1,n) );
108 if( vt_t == NULL ) {
110 goto exit_level_2;
111 }
112 }
113 /* Transpose input matrices */
114 LAPACKE_cge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
115 /* Call LAPACK function and adjust info */
116 LAPACK_cgesvd( &jobu, &jobvt, &m, &n, a_t, &lda_t, s, u_t, &ldu_t, vt_t,
117 &ldvt_t, work, &lwork, rwork, &info );
118 if( info < 0 ) {
119 info = info - 1;
120 }
121 /* Transpose output matrices */
122 LAPACKE_cge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
123 if( LAPACKE_lsame( jobu, 'a' ) || LAPACKE_lsame( jobu, 's' ) ) {
124 LAPACKE_cge_trans( LAPACK_COL_MAJOR, nrows_u, ncols_u, u_t, ldu_t,
125 u, ldu );
126 }
127 if( LAPACKE_lsame( jobvt, 'a' ) || LAPACKE_lsame( jobvt, 's' ) ) {
128 LAPACKE_cge_trans( LAPACK_COL_MAJOR, nrows_vt, n, vt_t, ldvt_t, vt,
129 ldvt );
130 }
131 /* Release memory and exit */
132 if( LAPACKE_lsame( jobvt, 'a' ) || LAPACKE_lsame( jobvt, 's' ) ) {
133 LAPACKE_free( vt_t );
134 }
135exit_level_2:
136 if( LAPACKE_lsame( jobu, 'a' ) || LAPACKE_lsame( jobu, 's' ) ) {
137 LAPACKE_free( u_t );
138 }
139exit_level_1:
140 LAPACKE_free( a_t );
141exit_level_0:
142 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
143 LAPACKE_xerbla( "LAPACKE_cgesvd_work", info );
144 }
145 } else {
146 info = -1;
147 LAPACKE_xerbla( "LAPACKE_cgesvd_work", info );
148 }
149 return info;
150}
#define LAPACK_cgesvd(...)
Definition: lapack.h:3387
#define lapack_int
Definition: lapack.h:87
#define lapack_complex_float
Definition: lapack.h:46
#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_cgesvd_work(int matrix_layout, char jobu, char jobvt, lapack_int m, lapack_int n, lapack_complex_float *a, lapack_int lda, float *s, lapack_complex_float *u, lapack_int ldu, lapack_complex_float *vt, lapack_int ldvt, lapack_complex_float *work, lapack_int lwork, float *rwork)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
#define MIN(x, y)
Definition: lapacke_utils.h:49
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_cge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *in, lapack_int ldin, lapack_complex_float *out, lapack_int ldout)