119 lines
3.3 KiB
C++
119 lines
3.3 KiB
C++
/*
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* Copyright (c) 2001-2005 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: bufif.cc,v 1.14 2005/06/22 00:04:48 steve Exp $"
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#endif
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# include "bufif.h"
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# include "schedule.h"
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# include "statistics.h"
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# include <iostream>
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# include <assert.h>
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vvp_fun_bufif::vvp_fun_bufif(bool en_invert, bool out_invert,
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unsigned str0, unsigned str1)
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: pol_(en_invert? 1 : 0), inv_(out_invert? 1 : 0)
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{
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drive0_ = str0;
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drive1_ = str1;
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count_functors_bufif += 1;
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}
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void vvp_fun_bufif::recv_vec4(vvp_net_ptr_t ptr, const vvp_vector4_t&bit)
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{
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switch (ptr.port()) {
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case 0:
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bit_ = inv_? ~bit : bit;
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break;
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case 1:
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en_ = pol_? ~bit : bit;
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break;
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default:
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return;
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}
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vvp_vector8_t out (bit.size());
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for (unsigned idx = 0 ; idx < bit.size() ; idx += 1) {
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vvp_bit4_t b_en = en_.value(idx);
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vvp_bit4_t b_bit = bit_.value(idx);
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switch (b_en) {
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case BIT4_0:
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out.set_bit(idx, vvp_scalar_t(BIT4_Z,drive0_,drive1_));
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break;
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case BIT4_1:
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if (bit4_is_xz(b_bit))
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out.set_bit(idx, vvp_scalar_t(BIT4_X,drive0_,drive1_));
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else
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out.set_bit(idx, vvp_scalar_t(b_bit,drive0_,drive1_));
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break;
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default:
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switch (b_bit) {
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case BIT4_0:
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out.set_bit(idx, vvp_scalar_t(BIT4_X,drive0_,0));
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break;
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case BIT4_1:
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out.set_bit(idx, vvp_scalar_t(BIT4_X,0,drive1_));
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break;
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default:
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out.set_bit(idx, vvp_scalar_t(BIT4_X,drive0_,drive1_));
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break;
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}
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break;
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}
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}
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vvp_send_vec8(ptr.ptr()->out, out);
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}
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/*
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* $Log: bufif.cc,v $
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* Revision 1.14 2005/06/22 00:04:48 steve
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* Reduce vvp_vector4 copies by using const references.
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*
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* Revision 1.13 2005/06/02 16:02:11 steve
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* Add support for notif0/1 gates.
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* Make delay nodes support inertial delay.
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* Add the %force/link instruction.
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*
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* Revision 1.12 2005/04/13 06:34:20 steve
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* Add vvp driver functor for logic outputs,
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* Add ostream output operators for debugging.
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*
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* Revision 1.11 2005/03/12 04:27:42 steve
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* Implement VPI access to signal strengths,
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* Fix resolution of ambiguous drive pairs,
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* Fix spelling of scalar.
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*
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* Revision 1.10 2005/02/07 22:42:42 steve
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* Add .repeat functor and BIFIF functors.
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*
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* Revision 1.9 2002/09/06 04:56:28 steve
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* Add support for %v is the display system task.
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* Change the encoding of H and L outputs from
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* the bufif devices so that they are logic x.
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*
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* Revision 1.8 2002/08/12 01:35:07 steve
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* conditional ident string using autoconfig.
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*/
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