A high-performance general-purpose compute library

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helloworld/helloworld.cpp
/*******************************************************
* Copyright (c) 2014, ArrayFire
* All rights reserved.
*
* This file is distributed under 3-clause BSD license.
* The complete license agreement can be obtained at:
* http://arrayfire.com/licenses/BSD-3-Clause
********************************************************/
#include <arrayfire.h>
#include <cstdio>
#include <cstdlib>
using namespace af;
int main(int argc, char* argv[]) {
try {
// Select a device and display arrayfire info
int device = argc > 1 ? atoi(argv[1]) : 0;
af::setDevice(device);
af::info();
printf("Create a 5-by-3 matrix of random floats on the GPU\n");
array A = randu(5, 3, f32);
af_print(A);
printf("Element-wise arithmetic\n");
array B = sin(A) + 1.5;
af_print(B);
printf("Negate the first three elements of second column\n");
B(seq(0, 2), 1) = B(seq(0, 2), 1) * -1;
af_print(B);
printf("Fourier transform the result\n");
array C = fft(B);
af_print(C);
printf("Grab last row\n");
array c = C.row(end);
af_print(c);
printf("Scan Test\n");
dim4 dims(16, 4, 1, 1);
array r = constant(2, dims);
af_print(r);
printf("Scan\n");
array S = af::scan(r, 0, AF_BINARY_MUL);
af_print(S);
printf("Create 2-by-3 matrix from host data\n");
float d[] = {1, 2, 3, 4, 5, 6};
array D(2, 3, d, afHost);
af_print(D);
printf("Copy last column onto first\n");
D.col(0) = D.col(end);
af_print(D);
// Sort A
printf("Sort A and print sorted array and corresponding indices\n");
array vals, inds;
sort(vals, inds, A);
af_print(vals);
af_print(inds);
} catch (af::exception& e) {
fprintf(stderr, "%s\n", e.what());
throw;
}
return 0;
}
arrayfire.h
af::array
A multi dimensional data container.
Definition array.h:37
af::dim4
Generic object that represents size and shape.
Definition dim4.hpp:26
af::exception
An ArrayFire exception class.
Definition exception.h:22
af::exception::what
virtual const char * what() const
Returns an error message for the exception in a string format.
Definition exception.h:46
af::seq
seq is used to create sequences for indexing af::array
Definition seq.h:46
f32
@ f32
32-bit floating point values
Definition defines.h:211
AF_BINARY_MUL
@ AF_BINARY_MUL
Definition defines.h:432
afHost
@ afHost
Host pointer.
Definition defines.h:234
af::array::col
array::array_proxy col(int index)
Returns a reference to a col.
af::array::row
array::array_proxy row(int index)
Returns a reference to a row.
af::info
AFAPI void info()
af::setDevice
AFAPI void setDevice(const int device)
Sets the current device.
af::scan
AFAPI array scan(const array &in, const int dim=0, binaryOp op=AF_BINARY_ADD, bool inclusive_scan=true)
C++ Interface to scan an array (generalized) over a given dimension.
af
Definition algorithm.h:15
af_print
#define af_print(...)
Definition util.h:148