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Add a make_const_0() function to create an all-zero constant net. 

Factor out the common code with make_const_x() and make_const_z().
This commit is contained in:
Martin Whitaker 2024-01-27 13:18:40 +00:00
parent 01e64861da
commit d0af41442b
2 changed files with 18 additions and 17 deletions
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30
netmisc.cc
View File

@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2001-2021 Stephen Williams (steve@icarus.com) * Copyright (c) 2001-2024 Stephen Williams (steve@icarus.com)
* *
* This source code is free software; you can redistribute it * This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU * and/or modify it in source code form under the terms of the GNU
@ -765,13 +765,12 @@ NetEConst* make_const_val_s(long value)
return res; return res;
} }
NetNet* make_const_x(Design*des, NetScope*scope, unsigned long wid) static NetNet* make_const_net(Design*des, NetScope*scope, verinum val)
{ {
verinum xxx (verinum::Vx, wid); NetConst*res = new NetConst(scope, scope->local_symbol(), val);
NetConst*res = new NetConst(scope, scope->local_symbol(), xxx);
des->add_node(res); des->add_node(res);
netvector_t*sig_vec = new netvector_t(IVL_VT_LOGIC, wid-1, 0); netvector_t*sig_vec = new netvector_t(IVL_VT_LOGIC, val.len() - 1, 0);
NetNet*sig = new NetNet(scope, scope->local_symbol(), NetNet::WIRE, sig_vec); NetNet*sig = new NetNet(scope, scope->local_symbol(), NetNet::WIRE, sig_vec);
sig->local_flag(true); sig->local_flag(true);
@ -779,18 +778,19 @@ NetNet* make_const_x(Design*des, NetScope*scope, unsigned long wid)
return sig; return sig;
} }
NetNet* make_const_0(Design*des, NetScope*scope, unsigned long wid)
{
return make_const_net(des, scope, verinum(verinum::V0, wid));
}
NetNet* make_const_x(Design*des, NetScope*scope, unsigned long wid)
{
return make_const_net(des, scope, verinum(verinum::Vx, wid));
}
NetNet* make_const_z(Design*des, NetScope*scope, unsigned long wid) NetNet* make_const_z(Design*des, NetScope*scope, unsigned long wid)
{ {
verinum xxx (verinum::Vz, wid); return make_const_net(des, scope, verinum(verinum::Vz, wid));
NetConst*res = new NetConst(scope, scope->local_symbol(), xxx);
des->add_node(res);
netvector_t*sig_vec = new netvector_t(IVL_VT_LOGIC, wid-1, 0);
NetNet*sig = new NetNet(scope, scope->local_symbol(), NetNet::WIRE, sig_vec);
sig->local_flag(true);
connect(sig->pin(0), res->pin(0));
return sig;
} }
NetExpr* condition_reduce(NetExpr*expr) NetExpr* condition_reduce(NetExpr*expr)

5
netmisc.h
View File

@ -1,7 +1,7 @@
#ifndef IVL_netmisc_H #ifndef IVL_netmisc_H
#define IVL_netmisc_H #define IVL_netmisc_H
/* /*
* Copyright (c) 1999-2021 Stephen Williams (steve@icarus.com) * Copyright (c) 1999-2024 Stephen Williams (steve@icarus.com)
* *
* This source code is free software; you can redistribute it * This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU * and/or modify it in source code form under the terms of the GNU
@ -330,8 +330,9 @@ extern NetEConst*make_const_val(unsigned long val);
extern NetEConst*make_const_val_s(long val); extern NetEConst*make_const_val_s(long val);
/* /*
* Make A const net * Make a const net.
*/ */
extern NetNet* make_const_0(Design*des, NetScope*scope, unsigned long wid);
extern NetNet* make_const_x(Design*des, NetScope*scope, unsigned long wid); extern NetNet* make_const_x(Design*des, NetScope*scope, unsigned long wid);
extern NetNet* make_const_z(Design*des, NetScope*scope, unsigned long wid); extern NetNet* make_const_z(Design*des, NetScope*scope, unsigned long wid);