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tag: s20130827
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/*
* Copyright (c) 2012-2013 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
# include "nettypes.h"
# include <cassert>
using namespace std;
ivl_type_s::~ivl_type_s()
{
}
long ivl_type_s::packed_width(void) const
{
return 1;
}
vector<netrange_t> ivl_type_s::slice_dimensions() const
{
return vector<netrange_t>();
}
ivl_variable_type_t ivl_type_s::base_type() const
{
return IVL_VT_NO_TYPE;
}
bool ivl_type_s::get_signed() const
{
return false;
}
netarray_t::~netarray_t()
{
}
ivl_variable_type_t netarray_t::base_type() const
{
return element_type_->base_type();
}
unsigned long netrange_width(const vector<netrange_t>&packed)
{
unsigned wid = 1;
for (vector<netrange_t>::const_iterator cur = packed.begin()
; cur != packed.end() ; ++cur) {
unsigned use_wid = cur->width();
wid *= use_wid;
}
return wid;
}
/*
* Given a netrange_t list (which represent packed dimensions) and a
* prefix of calculated index values, calculate the canonical offset
* and width of the resulting slice. In this case, the "sb" argument
* is an extra index of the prefix.
*/
bool prefix_to_slice(const std::vector<netrange_t>&dims,
const std::list<long>&prefix, long sb,
long&loff, unsigned long&lwid)
{
assert(prefix.size() < dims.size());
size_t acc_wid = 1;
vector<netrange_t>::const_iterator pcur = dims.end();
for (size_t idx = prefix.size()+1 ; idx < dims.size() ; idx += 1) {
-- pcur;
acc_wid *= pcur->width();
}
lwid = acc_wid;
-- pcur;
if (sb < pcur->get_msb() && sb < pcur->get_lsb())
return false;
if (sb > pcur->get_msb() && sb > pcur->get_lsb())
return false;
long acc_off = 0;
if (pcur->get_msb() >= pcur->get_lsb())
acc_off += (sb - pcur->get_lsb()) * acc_wid;
else
acc_off += (pcur->get_lsb() - sb) * acc_wid;
if (prefix.empty()) {
loff = acc_off;
return true;
}
lwid *= pcur->width();
list<long>::const_iterator icur = prefix.end();
do {
-- pcur;
-- icur;
acc_wid *= pcur->width();
if (pcur->get_msb() >= pcur->get_lsb())
acc_off += (*icur - pcur->get_lsb()) * acc_wid;
else
acc_off += (pcur->get_lsb() - *icur) * acc_wid;
} while (icur != prefix.begin());
loff = acc_off;
return true;
}
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