LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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lapacke_sgtrfs_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:
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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
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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
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28*****************************************************************************
29* Contents: Native middle-level C interface to LAPACK function sgtrfs
30* Author: Intel Corporation
31*****************************************************************************/
32
33#include "lapacke_utils.h"
34
35lapack_int LAPACKE_sgtrfs_work( int matrix_layout, char trans, lapack_int n,
36 lapack_int nrhs, const float* dl,
37 const float* d, const float* du,
38 const float* dlf, const float* df,
39 const float* duf, const float* du2,
40 const lapack_int* ipiv, const float* b,
41 lapack_int ldb, float* x, lapack_int ldx,
42 float* ferr, float* berr, float* work,
43 lapack_int* iwork )
44{
45 lapack_int info = 0;
46 if( matrix_layout == LAPACK_COL_MAJOR ) {
47 /* Call LAPACK function and adjust info */
48 LAPACK_sgtrfs( &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2, ipiv, b,
49 &ldb, x, &ldx, ferr, berr, work, iwork, &info );
50 if( info < 0 ) {
51 info = info - 1;
52 }
53 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
54 lapack_int ldb_t = MAX(1,n);
55 lapack_int ldx_t = MAX(1,n);
56 float* b_t = NULL;
57 float* x_t = NULL;
58 /* Check leading dimension(s) */
59 if( ldb < nrhs ) {
60 info = -14;
61 LAPACKE_xerbla( "LAPACKE_sgtrfs_work", info );
62 return info;
63 }
64 if( ldx < nrhs ) {
65 info = -16;
66 LAPACKE_xerbla( "LAPACKE_sgtrfs_work", info );
67 return info;
68 }
69 /* Allocate memory for temporary array(s) */
70 b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
71 if( b_t == NULL ) {
73 goto exit_level_0;
74 }
75 x_t = (float*)LAPACKE_malloc( sizeof(float) * ldx_t * MAX(1,nrhs) );
76 if( x_t == NULL ) {
78 goto exit_level_1;
79 }
80 /* Transpose input matrices */
81 LAPACKE_sge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
82 LAPACKE_sge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
83 /* Call LAPACK function and adjust info */
84 LAPACK_sgtrfs( &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2, ipiv,
85 b_t, &ldb_t, x_t, &ldx_t, ferr, berr, work, iwork,
86 &info );
87 if( info < 0 ) {
88 info = info - 1;
89 }
90 /* Transpose output matrices */
91 LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
92 /* Release memory and exit */
93 LAPACKE_free( x_t );
94exit_level_1:
95 LAPACKE_free( b_t );
96exit_level_0:
97 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
98 LAPACKE_xerbla( "LAPACKE_sgtrfs_work", info );
99 }
100 } else {
101 info = -1;
102 LAPACKE_xerbla( "LAPACKE_sgtrfs_work", info );
103 }
104 return info;
105}
#define lapack_int
Definition: lapack.h:87
#define LAPACK_sgtrfs(...)
Definition: lapack.h:5835
#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_sgtrfs_work(int matrix_layout, char trans, lapack_int n, lapack_int nrhs, const float *dl, const float *d, const float *du, const float *dlf, const float *df, const float *duf, const float *du2, const lapack_int *ipiv, const float *b, lapack_int ldb, float *x, lapack_int ldx, float *ferr, float *berr, float *work, lapack_int *iwork)
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)
Definition: lapacke_utils.h:46