56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
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/***************************************************************************************
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* This file includes functions that are used to decode integer to binary vectors
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* or the reverse operation
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***************************************************************************************/
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#include <cmath>
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/* Headers from vtrutil library */
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#include "vtr_assert.h"
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#include "openfpga_decode.h"
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/* begin namespace openfpga */
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namespace openfpga {
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/********************************************************************
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* Convert an integer to an one-hot encoding integer array
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********************************************************************/
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std::vector<size_t> ito1hot_vec(const size_t& in_int,
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const size_t& bin_len) {
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/* Make sure we do not have any overflow! */
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VTR_ASSERT ( (in_int <= bin_len) );
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/* Initialize */
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std::vector<size_t> ret(bin_len, 0);
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if (bin_len == in_int) {
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return ret; /* all zero case */
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}
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ret[in_int] = 1; /* Keep a good sequence of bits */
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return ret;
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}
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/********************************************************************
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* Converter an integer to a binary vector
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********************************************************************/
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std::vector<size_t> itobin_vec(const size_t& in_int,
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const size_t& bin_len) {
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std::vector<size_t> ret(bin_len, 0);
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/* Make sure we do not have any overflow! */
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VTR_ASSERT ( (in_int < pow(2., bin_len)) );
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size_t temp = in_int;
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for (size_t i = 0; i < bin_len; i++) {
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if (1 == temp % 2) {
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ret[i] = 1; /* Keep a good sequence of bits */
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}
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temp = temp / 2;
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}
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return ret;
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}
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} /* end namespace openfpga */
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