module.cc

一个mips虚拟机非常好代码,使用C++来编写的,希望大家多学学,

#include <string.h>
#include "assert.hh"
#include "checkpoint.hh"
#include "cpu.hh"
#include "module.hh"
#include "simarg.hh"


// Serialization support.

Module::Module(Checkpoint &cp)
    : Serializable(cp), BasicModule(extract_line(cp))
{
    // done.
}

void
Module::checkpoint(Checkpoint &cp, bool parent) const
{
    assert(!parent);
    cp << name() << '\n';
}


// Tcl interfaces.

Module::Module(const SimArgs &args)
    : BasicModule(args[1])
{
    // done.
}

SimArg
Module::install_module(const SimArgs &args)
{
    if (args.length() < 2)
	throw Error("\"sim::install\" expects at least two arguments.");
    const char *name = args[0];
    Serializable *obj = find_type(name).create(args);
    if (!dynamic_cast<Module *>(obj))
	throw Error("\"%#s\" is not a module type.", name);
    if (dynamic_cast<CPU *>(obj) && args.length() < 3)
	throw Error("No CPU speed specified.");
    return "";
}

SimArg
Module::reset_all(const SimArgs &args)
{
    bool warm = false;
    if (args.length() > 1)
	throw Error("\"sim::reset\" expects at most one argument.");
    else if (args.length() == 1) {
	if (!strcmp(args[0], "cold"))
	    warm = false;
	else if (!strcmp(args[0], "warm"))
	    warm = true;
	else {
	    throw Error("Invalid argument to \"sim::reset\".");
	}
    }
    for (ObjectIterator i; i; ++i) {
	Module *mod = dynamic_cast<Module *>(&*i);
	if (mod) {
	    mod->reset(warm);
	}
    }
    return "";
}


// Search the object list for a module with the given name.
Module *
find_module(const char *name)
{
    for (ObjectIterator i; i; ++i) {
	Module *mod = dynamic_cast<Module *>(&*i);
	if (mod && !strcmp(mod->name(), name))
	    return mod;
    }
    return 0;
}