203 lines
7.4 KiB
C
203 lines
7.4 KiB
C
#ifndef __target_H
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#define __target_H
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/*
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* Copyright (c) 1998-1999 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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#if !defined(WINNT) && !defined(macintosh)
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#ident "$Id: target.h,v 1.48 2000/11/04 01:54:01 steve Exp $"
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#endif
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# include "netlist.h"
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/*
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* This header file describes the types and constants used to describe
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* the possible target output types of the compiler. The backends
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* provide one of these in order to tell the previous steps what the
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* backend is able to do.
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*/
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/*
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* The backend driver is hooked into the compiler, and given a name,
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* by creating an instance of the target structure. The structure has
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* the name that the compiler will use to locate the driver, and a
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* pointer to a target_t object that is the actual driver.
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*/
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struct target {
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const char* name;
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struct target_t* meth;
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};
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/*
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* The emit process uses a target_t driver to send the completed
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* design to a file. It is up to the driver object to follow along in
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* the iteration through the design, generating output as it can.
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*/
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struct target_t {
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virtual ~target_t();
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/* Start the design. This sets the main output file stream
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that the target should use. */
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virtual bool start_design(const Design*) =0;
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/* This is called once for each scope in the design, before
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anything else is called. */
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virtual void scope(const NetScope*);
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/* Output an event object. Called for each named event in the scope. */
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virtual void event(const NetEvent*);
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/* Output a signal (called for each signal) */
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virtual void signal(const NetNet*) =0;
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/* Output a memory (called for each memory object) */
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virtual void memory(const NetMemory*);
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/* Output a defined task. */
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virtual void task_def(const NetTaskDef*);
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virtual void func_def(const NetFuncDef*);
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/* LPM style components are handled here. */
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virtual void lpm_add_sub(const NetAddSub*);
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virtual void lpm_clshift(const NetCLShift*);
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virtual void lpm_compare(const NetCompare*);
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virtual void lpm_divide(const NetDivide*);
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virtual void lpm_modulo(const NetModulo*);
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virtual void lpm_ff(const NetFF*);
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virtual void lpm_mult(const NetMult*);
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virtual void lpm_mux(const NetMux*);
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virtual void lpm_ram_dq(const NetRamDq*);
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/* Output a gate (called for each gate) */
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virtual void logic(const NetLogic*);
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virtual bool bufz(const NetBUFZ*);
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virtual void udp(const NetUDP*);
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virtual void udp_comb(const NetUDP_COMB*);
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virtual void net_assign(const NetAssign_*);
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virtual void net_case_cmp(const NetCaseCmp*);
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virtual bool net_cassign(const NetCAssign*);
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virtual bool net_const(const NetConst*);
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virtual bool net_force(const NetForce*);
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virtual void net_probe(const NetEvProbe*);
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/* Output a process (called for each process). It is up to the
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target to recurse if desired. */
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virtual bool process(const NetProcTop*);
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/* Various kinds of process nodes are dispatched through these. */
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virtual void proc_assign(const NetAssign*);
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virtual void proc_assign_mem(const NetAssignMem*);
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virtual void proc_assign_nb(const NetAssignNB*);
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virtual void proc_assign_mem_nb(const NetAssignMemNB*);
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virtual bool proc_block(const NetBlock*);
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virtual void proc_case(const NetCase*);
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virtual bool proc_cassign(const NetCAssign*);
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virtual void proc_condit(const NetCondit*);
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virtual bool proc_deassign(const NetDeassign*);
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virtual bool proc_delay(const NetPDelay*);
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virtual bool proc_disable(const NetDisable*);
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virtual bool proc_force(const NetForce*);
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virtual void proc_forever(const NetForever*);
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virtual bool proc_release(const NetRelease*);
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virtual void proc_repeat(const NetRepeat*);
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virtual bool proc_trigger(const NetEvTrig*);
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virtual void proc_stask(const NetSTask*);
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virtual void proc_utask(const NetUTask*);
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virtual bool proc_wait(const NetEvWait*);
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virtual void proc_while(const NetWhile*);
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/* Done with the design. */
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virtual void end_design(const Design*);
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};
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/* This class is used by the NetExpr class to help with the scanning
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of expressions. */
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struct expr_scan_t {
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virtual ~expr_scan_t();
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virtual void expr_const(const NetEConst*);
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virtual void expr_concat(const NetEConcat*);
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virtual void expr_memory(const NetEMemory*);
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virtual void expr_scope(const NetEScope*);
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virtual void expr_sfunc(const NetESFunc*);
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virtual void expr_signal(const NetESignal*);
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virtual void expr_subsignal(const NetESubSignal*);
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virtual void expr_ternary(const NetETernary*);
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virtual void expr_ufunc(const NetEUFunc*);
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virtual void expr_unary(const NetEUnary*);
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virtual void expr_binary(const NetEBinary*);
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};
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/* The emit functions take a design and emit it to the output stream
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using the specified target. If the target is given by name, it is
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located in the target_table and used. */
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extern bool emit(const Design*des, const char*type);
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/* This function takes a fully qualified verilog name (which may have,
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for example, dots in it) and produces a mangled version that can be
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used by most any language. */
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extern string mangle(const string&str);
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/* This is the table of supported output targets. It is a null
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terminated array of pointers to targets. */
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extern const struct target *target_table[];
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/*
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* $Log: target.h,v $
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* Revision 1.48 2000/11/04 01:54:01 steve
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* Modifications in support of gcc 2.96
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*
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* Revision 1.47 2000/09/26 01:35:43 steve
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* Remove the obsolete NetEIdent class.
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*
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* Revision 1.46 2000/09/17 21:26:16 steve
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* Add support for modulus (Eric Aardoom)
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*
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* Revision 1.45 2000/09/02 20:54:21 steve
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* Rearrange NetAssign to make NetAssign_ separate.
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*
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* Revision 1.44 2000/08/27 15:51:51 steve
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* t-dll iterates signals, and passes them to the
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* target module.
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*
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* Some of NetObj should return char*, not string.
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*
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* Revision 1.43 2000/08/14 04:39:57 steve
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* add th t-dll functions for net_const, net_bufz and processes.
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*
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* Revision 1.42 2000/08/09 03:43:45 steve
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* Move all file manipulation out of target class.
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*
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* Revision 1.41 2000/08/08 01:50:42 steve
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* target methods need not take a file stream.
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*
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* Revision 1.40 2000/07/29 16:21:08 steve
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* Report code generation errors through proc_delay.
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*
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* Revision 1.39 2000/07/27 05:13:44 steve
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* Support elaboration of disable statements.
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*
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* Revision 1.38 2000/05/11 23:37:27 steve
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* Add support for procedural continuous assignment.
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*
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* Revision 1.37 2000/05/04 03:37:59 steve
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* Add infrastructure for system functions, move
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* $time to that structure and add $random.
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*/
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#endif
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