HLS_Byte_Serializer/sources/CConverter/CConverterFromBytes.hpp

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/*
* Copyright or © or Copr. Université de Bretagne-Sud, Lab-STICC, Bordeaux-INP, IMS
* Contributor(s) : Camille Monière (2022)
*
* camille.moniere@univ-ubs.fr, camille.moniere@ims-bordeaux.fr
*
* This software is a computer program whose purpose is to simulate and implement C-type
* to bytes FPGA IPs.
*
* This software is governed by the CeCILL-B license under French law and
* abiding by the rules of distribution of free software. You can use,
* modify and/ or redistribute the software under the terms of the CeCILL-B
* license as circulated by CEA, CNRS and INRIA at the following URL
* "http://www.cecill.info".
*
* As a counterpart to the access to the source code and rights to copy,
* modify and redistribute granted by the license, users are provided only
* with a limited warranty and the software's author, the holder of the
* economic rights, and the successive licensors have only limited
* liability.
*
* In this respect, the user's attention is drawn to the risks associated
* with loading, using, modifying and/or developing or reproducing the
* software by the user in light of its specific status of free software,
* that may mean that it is complicated to manipulate, and that also
* therefore means that it is reserved for developers and experienced
* professionals having in-depth computer knowledge. Users are therefore
* encouraged to load and test the software's suitability as regards their
* requirements in conditions enabling the security of their systems and/or
* data to be ensured and, more generally, to use and operate it in the
* same conditions as regards security.
*
* The fact that you are presently reading this means that you have had
* knowledge of the CeCILL-B license and that you accept its terms.
*/
#ifndef _CONVERTER_FROM_BYTES_HPP_
#define _CONVERTER_FROM_BYTES_HPP_
#include <ap_int.h>
#include <cstdint>
#include <hls_stream.h>
template <uint32_t stream_len = 1, bool LittleEndian = true, bool use_sign = false>
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class CConverterFromBytes;
template <uint32_t stream_len>
class CConverterFromBytes<stream_len, true, false> {
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public:
template <typename T, uint32_t sizeofT = sizeof(T)>
static void process(hls::stream<uint8_t> & strm_in, hls::stream<T> & strm_out) {
#if !defined(XILINX_MAJOR)
static_assert(std::numeric_limits<T>::is_integer, "T must be an integer C-type.");
static_assert(std::is_unsigned<T>(), "T must be an unsigned type.");
#endif
LOOP_STR_B2T_LE:
for (uint32_t u = 0; u < stream_len; u++) {
ap_uint<sizeofT * 8> word_buffer = 0;
LOOP_BYTE_B2T_LE:
for (uint32_t v = 0; v < sizeofT; v++) {
const ap_uint<8> byte_buffer = strm_in.read();
word_buffer >>= 8;
word_buffer(sizeofT * 8 - 1, (sizeofT - 1) * 8) = byte_buffer.range();
}
strm_out.write(word_buffer);
}
}
};
template <uint32_t stream_len>
class CConverterFromBytes<stream_len, false, false> {
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public:
template <typename T, uint32_t sizeofT = sizeof(T)>
static void process(hls::stream<uint8_t> & strm_in, hls::stream<T> & strm_out) {
#if !defined(XILINX_MAJOR)
static_assert(std::numeric_limits<T>::is_integer, "T must be an integer C-type.");
static_assert(std::is_unsigned<T>(), "T must be an unsigned type.");
#endif
LOOP_STR_B2T_BE:
for (uint32_t u = 0; u < stream_len; u++) {
ap_uint<sizeofT * 8> word_buffer = 0;
LOOP_BYTE_B2T_BE:
for (uint32_t v = 0; v < sizeofT; v++) {
const ap_uint<8> byte_buffer = strm_in.read();
word_buffer <<= 8;
word_buffer += byte_buffer;
}
strm_out.write(word_buffer);
}
}
};
template <uint32_t stream_len>
class CConverterFromBytes<stream_len, true, true> {
public:
template <typename T, uint32_t sizeofT = sizeof(T)>
static void process(hls::stream<uint8_t> & strm_in, hls::stream<T> & strm_out) {
#if !defined(XILINX_MAJOR)
static_assert(std::numeric_limits<T>::is_integer, "T must be an integer C-type.");
static_assert(std::is_signed<T>(), "T must be a signed type.");
#endif
LOOP_STR_B2T_LE:
for (uint32_t u = 0; u < stream_len; u++) {
ap_int<sizeofT * 8> word_buffer = 0;
LOOP_BYTE_B2T_LE:
for (uint32_t v = 0; v < sizeofT; v++) {
const ap_uint<8> byte_buffer = strm_in.read();
word_buffer >>= 8;
word_buffer(sizeofT * 8 - 1, (sizeofT - 1) * 8) = byte_buffer.range();
}
strm_out.write(word_buffer);
}
}
};
template <uint32_t stream_len>
class CConverterFromBytes<stream_len, false, true> {
public:
template <typename T, uint32_t sizeofT = sizeof(T)>
static void process(hls::stream<uint8_t> & strm_in, hls::stream<T> & strm_out) {
#if !defined(XILINX_MAJOR)
static_assert(std::numeric_limits<T>::is_integer, "T must be an integer C-type.");
static_assert(std::is_signed<T>(), "T must be an signed type.");
#endif
LOOP_STR_B2T_BE:
for (uint32_t u = 0; u < stream_len; u++) {
ap_int<sizeofT * 8> word_buffer = 0;
LOOP_BYTE_B2T_BE:
for (uint32_t v = 0; v < sizeofT; v++) {
const ap_uint<8> byte_buffer = strm_in.read();
word_buffer <<= 8;
word_buffer(7, 0) = byte_buffer.range();
}
strm_out.write(word_buffer);
}
}
};
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#endif // _CONVERTER_FROM_BYTES_HPP_