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/*****************************************************************************
sc_lv_base.cpp -- Arbitrary size logic vector class.
Original Author: Gene Bushuyev, Synopsys, Inc.
*****************************************************************************/
/*****************************************************************************
MODIFICATION LOG - modifiers, enter your name, affiliation, date and
changes you are making here.
Name, Affiliation, Date:
Description of Modification:
*****************************************************************************/
// $Log: sc_lv_base.cpp,v $
// Revision 1.2 2011/08/24 22:05:40 acg
// Torsten Maehne: initialization changes to remove warnings.
//
// Revision 1.1.1.1 2006/12/15 20:20:04 acg
// SystemC 2.3
//
// Revision 1.3 2006/01/13 18:53:53 acg
// Andy Goodrich: added $Log command so that CVS comments are reproduced in
// the source.
//
#include <sstream>
#include "systemc/ext/dt/bit/sc_lv_base.hh"
namespace sc_dt
{
// explicit template instantiations
template class sc_proxy<sc_lv_base>;
template class sc_proxy<sc_bv_base>;
void
sc_proxy_out_of_bounds(const char *msg, int64 val)
{
std::stringstream ss;
if (msg != NULL)
ss << msg;
if (val != 0)
ss << val;
SC_REPORT_ERROR("(E5) out of bounds", ss.str().c_str());
}
// ----------------------------------------------------------------------------
// CLASS : sc_lv_base
//
// Arbitrary size logic vector base class.
// ----------------------------------------------------------------------------
static const sc_digit data_array[] = {
SC_DIGIT_ZERO, ~SC_DIGIT_ZERO, SC_DIGIT_ZERO, ~SC_DIGIT_ZERO
};
static const sc_digit ctrl_array[] = {
SC_DIGIT_ZERO, SC_DIGIT_ZERO, ~SC_DIGIT_ZERO, ~SC_DIGIT_ZERO
};
void
sc_lv_base::init(int length_, const sc_logic& init_value)
{
// check the length
if (length_ <= 0) {
SC_REPORT_ERROR("zero length", 0);
sc_core::sc_abort(); // can't recover from here
}
// allocate memory for the data and control words
m_len = length_;
m_size = (m_len - 1) / SC_DIGIT_SIZE + 1;
m_data = new sc_digit[m_size * 2];
m_ctrl = m_data + m_size;
// initialize the bits to 'init_value'
sc_digit dw = data_array[init_value.value()];
sc_digit cw = ctrl_array[init_value.value()];
int sz = m_size;
for (int i = 0; i < sz; ++i) {
m_data[i] = dw;
m_ctrl[i] = cw;
}
clean_tail();
}
void
sc_lv_base::assign_from_string(const std::string &s)
{
// s must have been converted to bin
int len = m_len;
int s_len = s.length() - 1;
int min_len = sc_min(len, s_len);
int i = 0;
for (; i < min_len; ++i) {
char c = s[s_len - i - 1];
set_bit(i, sc_logic::char_to_logic[(int)c]);
}
// if formatted, fill the rest with sign(s), otherwise fill with zeros
sc_logic_value_t fill = (s[s_len] == 'F' ? sc_logic_value_t(s[0] - '0')
: sc_logic_value_t(0));
for (; i < len; ++i) {
set_bit(i, fill);
}
}
// constructors
sc_lv_base::sc_lv_base(const char *a) :
m_len(0), m_size(0), m_data(0), m_ctrl(0)
{
std::string s = convert_to_bin(a);
init(s.length() - 1);
assign_from_string(s);
}
sc_lv_base::sc_lv_base(const char *a, int length_) :
m_len(0), m_size(0), m_data(0), m_ctrl(0)
{
init(length_);
assign_from_string(convert_to_bin(a));
}
sc_lv_base::sc_lv_base(const sc_lv_base &a) :
sc_proxy<sc_lv_base>(), m_len(a.m_len), m_size(a.m_size),
m_data(new sc_digit[m_size * 2]), m_ctrl(m_data + m_size)
{
// copy the bits
int sz = m_size;
for (int i = 0; i < sz; ++i) {
m_data[i] = a.m_data[i];
m_ctrl[i] = a.m_ctrl[i];
}
}
// assignment operators
sc_lv_base &
sc_lv_base::operator = (const char *a)
{
assign_from_string(convert_to_bin(a));
return *this;
}
// returns true if logic vector contains only 0's and 1's
bool
sc_lv_base::is_01() const
{
int sz = m_size;
for (int i = 0; i < sz; ++i) {
if (m_ctrl[i] != 0) {
return false;
}
}
return true;
}
} // namespace sc_dt