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cholesky.cpp
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95 lines (78 loc) · 2.98 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 <cholesky.hpp>
#include <backend.hpp>
#include <common/ArrayInfo.hpp>
#include <common/err_common.hpp>
#include <handle.hpp>
#include <af/array.h>
#include <af/defines.h>
#include <af/lapack.h>
using detail::cdouble;
using detail::cfloat;
template<typename T>
static inline af_array cholesky(int *info, const af_array in,
const bool is_upper) {
return getHandle(cholesky<T>(info, getArray<T>(in), is_upper));
}
template<typename T>
static inline int cholesky_inplace(af_array in, const bool is_upper) {
return cholesky_inplace<T>(getArray<T>(in), is_upper);
}
af_err af_cholesky(af_array *out, int *info, const af_array in,
const bool is_upper) {
try {
const ArrayInfo &i_info = getInfo(in);
if (i_info.ndims() > 2) {
AF_ERROR("cholesky can not be used in batch mode", AF_ERR_BATCH);
}
af_dtype type = i_info.getType();
if (i_info.ndims() == 0) {
return af_create_handle(out, 0, nullptr, type);
}
DIM_ASSERT(
1, i_info.dims()[0] == i_info.dims()[1]); // Only square matrices
ARG_ASSERT(2, i_info.isFloating()); // Only floating and complex types
af_array output;
switch (type) {
case f32: output = cholesky<float>(info, in, is_upper); break;
case f64: output = cholesky<double>(info, in, is_upper); break;
case c32: output = cholesky<cfloat>(info, in, is_upper); break;
case c64: output = cholesky<cdouble>(info, in, is_upper); break;
default: TYPE_ERROR(1, type);
}
std::swap(*out, output);
}
CATCHALL;
return AF_SUCCESS;
}
af_err af_cholesky_inplace(int *info, af_array in, const bool is_upper) {
try {
const ArrayInfo &i_info = getInfo(in);
if (i_info.ndims() > 2) {
AF_ERROR("cholesky can not be used in batch mode", AF_ERR_BATCH);
}
af_dtype type = i_info.getType();
if (i_info.ndims() == 0) { return AF_SUCCESS; }
ARG_ASSERT(1, i_info.isFloating()); // Only floating and complex types
DIM_ASSERT(
1, i_info.dims()[0] == i_info.dims()[1]); // Only square matrices
int out;
switch (type) {
case f32: out = cholesky_inplace<float>(in, is_upper); break;
case f64: out = cholesky_inplace<double>(in, is_upper); break;
case c32: out = cholesky_inplace<cfloat>(in, is_upper); break;
case c64: out = cholesky_inplace<cdouble>(in, is_upper); break;
default: TYPE_ERROR(1, type);
}
std::swap(*info, out);
}
CATCHALL;
return AF_SUCCESS;
}