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/*
* Copyright (c) 2001-2016 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 "bufif.h"
# include "schedule.h"
# include "statistics.h"
# include <iostream>
# include <cassert>
vvp_fun_bufif::vvp_fun_bufif(bool en_invert, bool out_invert,
unsigned str0, unsigned str1)
: pol_(en_invert? 1 : 0), inv_(out_invert? 1 : 0)
{
drive0_ = str0;
drive1_ = str1;
count_functors_bufif += 1;
}
void vvp_fun_bufif::recv_vec4(vvp_net_ptr_t ptr, const vvp_vector4_t&bit,
vvp_context_t)
{
switch (ptr.port()) {
case 0:
bit_ = inv_? ~bit : bit;
break;
case 1:
en_ = pol_? ~bit : bit;
break;
default:
return;
}
vvp_vector8_t out (bit.size());
for (unsigned idx = 0 ; idx < bit.size() ; idx += 1) {
vvp_bit4_t b_en = en_.value(idx);
vvp_bit4_t b_bit = bit_.value(idx);
switch (b_en) {
case BIT4_0:
out.set_bit(idx, vvp_scalar_t(BIT4_Z,drive0_,drive1_));
break;
case BIT4_1:
if (bit4_is_xz(b_bit))
out.set_bit(idx, vvp_scalar_t(BIT4_X,drive0_,drive1_));
else
out.set_bit(idx, vvp_scalar_t(b_bit,drive0_,drive1_));
break;
default:
switch (b_bit) {
case BIT4_0:
out.set_bit(idx, vvp_scalar_t(BIT4_X,drive0_,0));
break;
case BIT4_1:
out.set_bit(idx, vvp_scalar_t(BIT4_X,0,drive1_));
break;
default:
out.set_bit(idx, vvp_scalar_t(BIT4_X,drive0_,drive1_));
break;
}
break;
}
}
ptr.ptr()->send_vec8(out);
}
void vvp_fun_bufif::recv_vec4_pv(vvp_net_ptr_t ptr, const vvp_vector4_t&bit,
unsigned base, unsigned vwid, vvp_context_t ctx)
{
recv_vec4_pv_(ptr, bit, base, vwid, ctx);
}
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