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| 1 | +/***************************************************************************** |
| 2 | + Copyright (c) 2022, Intel Corp. |
| 3 | + All rights reserved. |
| 4 | +
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| 5 | + Redistribution and use in source and binary forms, with or without |
| 6 | + modification, are permitted provided that the following conditions are met: |
| 7 | +
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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 |
| 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 | +
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| 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 |
| 22 | + CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 23 | + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 24 | + INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 25 | + CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 26 | + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| 27 | + THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | +***************************************************************************** |
| 29 | +* Contents: Native middle-level C interface to LAPACK function zlangb |
| 30 | +* Author: Simon Märtens |
| 31 | +*****************************************************************************/ |
| 32 | + |
| 33 | +#include "lapacke_utils.h" |
| 34 | + |
| 35 | +double LAPACKE_zlangb_work( int matrix_layout, char norm, lapack_int n, |
| 36 | + lapack_int kl, lapack_int ku, |
| 37 | + const lapack_complex_double* ab, lapack_int ldab, |
| 38 | + double* work ) |
| 39 | +{ |
| 40 | + lapack_int info = 0; |
| 41 | + double res = 0.; |
| 42 | + if( matrix_layout == LAPACK_COL_MAJOR ) { |
| 43 | + /* Call LAPACK function and adjust info */ |
| 44 | + res = LAPACK_zlangb( &norm, &n, &kl, &ku, ab, &ldab, work ); |
| 45 | + } else if( matrix_layout == LAPACK_ROW_MAJOR ) { |
| 46 | + char norm_lapack; |
| 47 | + double* work_lapack = NULL; |
| 48 | + /* Check leading dimension(s) */ |
| 49 | + if( ldab < kl+ku+1 ) { |
| 50 | + info = -7; |
| 51 | + LAPACKE_xerbla( "LAPACKE_zlangb_work", info ); |
| 52 | + return info; |
| 53 | + } |
| 54 | + if( LAPACKE_lsame( norm, '1' ) || LAPACKE_lsame( norm, 'o' ) ) { |
| 55 | + norm_lapack = 'i'; |
| 56 | + } else if( LAPACKE_lsame( norm, 'i' ) ) { |
| 57 | + norm_lapack = '1'; |
| 58 | + } else { |
| 59 | + norm_lapack = norm; |
| 60 | + } |
| 61 | + /* Allocate memory for work array(s) */ |
| 62 | + if( LAPACKE_lsame( norm_lapack, 'i' ) ) { |
| 63 | + work_lapack = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,n) ); |
| 64 | + if( work_lapack == NULL ) { |
| 65 | + info = LAPACK_WORK_MEMORY_ERROR; |
| 66 | + goto exit_level_0; |
| 67 | + } |
| 68 | + } |
| 69 | + /* Call LAPACK function */ |
| 70 | + res = LAPACK_zlangb( &norm, &n, &ku, &kl, ab, &ldab, work ); |
| 71 | + /* Release memory and exit */ |
| 72 | + if( work_lapack ) { |
| 73 | + LAPACKE_free( work_lapack ); |
| 74 | + } |
| 75 | +exit_level_0: |
| 76 | + if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) { |
| 77 | + LAPACKE_xerbla( "LAPACKE_zlangb_work", info ); |
| 78 | + } |
| 79 | + } else { |
| 80 | + info = -1; |
| 81 | + LAPACKE_xerbla( "LAPACKE_zlangb_work", info ); |
| 82 | + } |
| 83 | + return res; |
| 84 | +} |
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