boolbv_replication.cpp

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/*******************************************************************\
 
Module:
 
Author: Daniel Kroening, kroening@kroening.com
 
\*******************************************************************/
 
#include "boolbv.h"
 
#include <util/arith_tools.h>
#include <util/bitvector_expr.h>
 
bvt boolbvt::convert_replication(const replication_exprt &expr)
{
  std::size_t width=boolbv_width(expr.type());
 
  mp_integer times = numeric_cast_v<mp_integer>(expr.times());
 
  bvt bv;
  bv.resize(width);
 
  const std::size_t u_times = numeric_cast_v<std::size_t>(times);
  const bvt &op = convert_bv(expr.op());
 
  INVARIANT(
    op.size() * u_times == bv.size(),
    "result bitvector width shall be equal to the operand bitvector width times"
    "the number of replications");
 
  std::size_t bit_idx = 0;
 
  for(std::size_t i = 0; i < u_times; i++)
  {
    for(const auto &bit : op)
    {
      bv[bit_idx] = bit;
      bit_idx++;
    }
  }
 
  return bv;
}