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/*
* Copyright 2014-2015 The University of Queensland
* http://www.uq.edu.au
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <cusp/multiply.h>
#include <cusp/cds_matrix.h>
#include <cusp/print.h>
typedef cusp::device_memory MemorySpace;
typedef double ValueType;
int main(void)
{
// initialize matrix
// args are: num_rows, num_entries, num_diagonals, blocksize
cusp::cds_matrix<int, ValueType, MemorySpace> A(8,28,3,2);
A.diagonal_offsets[0] = -3;
A.diagonal_offsets[1] = 0;
A.diagonal_offsets[2] = 2;
A.values(6,0) = 11;
A.values(7,0) = 17;
A.values(6,1) = 23;
A.values(7,1) = 27;
A.values(0,2) = 1;
A.values(1,2) = 3;
A.values(0,3) = 5;
A.values(1,3) = 7;
A.values(2,2) = 8;
A.values(3,2) = 29;
A.values(2,3) = 31;
A.values(3,3) = 37;
A.values(4,2) = 41;
A.values(5,2) = -1;
A.values(4,3) = -3;
A.values(5,3) = -5;
A.values(6,2) = -7;
A.values(7,2) =-11;
A.values(6,3) =-13;
A.values(7,3) =-17;
A.values(0,4) = 21;
A.values(1,4) = 12;
A.values(0,5) = 14;
A.values(1,5) = -3;
A.values(2,4) = -7;
A.values(3,4) = 22;
A.values(2,5) =-31;
A.values(3,5) = 5;
// initialize input vector
cusp::array1d<ValueType, MemorySpace> x(8);
x[0] = 1;
x[1] = 2;
x[2] = 3;
x[3] = 5;
x[4] =-1;
x[5] =-3;
x[6] =-7;
x[7] =-5;
// allocate output vector
cusp::array1d<ValueType, MemorySpace> y(8);
// compute y = A * x
cusp::multiply(A, x, y);
// print y
cusp::print(y);
cusp::transposed_multiply(A, y, x);
// print x
cusp::print(x);
return 0;
}
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