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gradient.cpp
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55 lines (47 loc) · 1.7 KB
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/*******************************************************
* 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 <backend.hpp>
#include <common/ArrayInfo.hpp>
#include <common/err_common.hpp>
#include <gradient.hpp>
#include <handle.hpp>
#include <af/defines.h>
#include <af/image.h>
using af::dim4;
using arrayfire::getArray;
using detail::cdouble;
using detail::cfloat;
template<typename T>
static inline void gradient(af_array *grad0, af_array *grad1,
const af_array in) {
gradient<T>(getArray<T>(*grad0), getArray<T>(*grad1), getArray<T>(in));
}
af_err af_gradient(af_array *grows, af_array *gcols, const af_array in) {
try {
const ArrayInfo &info = getInfo(in);
af_dtype type = info.getType();
af::dim4 idims = info.dims();
DIM_ASSERT(2, info.elements() > 0);
af_array grad0;
af_array grad1;
AF_CHECK(af_create_handle(&grad0, idims.ndims(), idims.get(), type));
AF_CHECK(af_create_handle(&grad1, idims.ndims(), idims.get(), type));
switch (type) {
case f32: gradient<float>(&grad0, &grad1, in); break;
case c32: gradient<cfloat>(&grad0, &grad1, in); break;
case f64: gradient<double>(&grad0, &grad1, in); break;
case c64: gradient<cdouble>(&grad0, &grad1, in); break;
default: TYPE_ERROR(1, type);
}
std::swap(*grows, grad0);
std::swap(*gcols, grad1);
}
CATCHALL;
return AF_SUCCESS;
}