Immediate.cc

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/*
    Copyright (c) 2002-2009 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
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/**
 * @file Immediate.cc
 *
 * Implementation of Immediate class.
 *
 * @author Ari Metsähalme 2005 (ari.metsahalme-no.spam-tut.fi)
 * @note rating: red
 */
 
#include "Immediate.hh"
#include "Terminal.hh"
#include "InstructionTemplate.hh"
#include "TerminalImmediate.hh"
 
using namespace TTAMachine;
 
namespace TTAProgram {
 
/////////////////////////////////////////////////////////////////////////////
// Immediate
/////////////////////////////////////////////////////////////////////////////
 
/**
 * The constructor.
 *
 * Creates a long immediate with the given value. The value specifies,
 * implicitly, also the width of the instruction field(s) where the
 * immediate bits are encoded). The destination register and the set
 * of instruction slots where the immediate bits are encoded are also
 * given as parameters.
 *
 * The ownership of the destination terminal object will be passed to
 * the immediate.
 *
 * @param value Value of the immediate.
 * @param dst Destination register.
 */
 
// Immediate::Immediate(
//    SimValue value, Terminal* dst)
//     :
//    value_(value), dst_(dst) {
//}
 
Immediate::Immediate(TerminalImmediate* value, Terminal* dst)
    : value_(value), dst_(dst), parent_(nullptr) {}
 
/**
 * The destructor.
 */
Immediate::~Immediate() {
    if (dst_ != NULL) {
        delete dst_;
        dst_ = NULL;
    }
 
    if (value_ != NULL) {
        delete value_;
        value_ = NULL;
    }
}
 
/**
 * Returns the destination register of this immediate.
 *
 * @return The destination register of this immediate.
 */
const Terminal&
Immediate::destination() const {
    assert(dst_ != NULL);
    return *dst_;
}
 
/**
 * Returns the value of this immediate.
 *
 * @return The value of this immediate.
 */
TerminalImmediate&
Immediate::value() const {
    assert(value_ != NULL);
    return *value_;
}
 
/**
 * Sets the value of immediate.
 *
 * @param Value to set for immediate.
 */
void
Immediate::setValue(TerminalImmediate* value) {
    if (value_ != NULL) {
        delete value_;
    }
    value_ = value;
}
 
/**
 * Makes a copy of the immediate.
 *
 * The copy is identical, except that it is not registered to the
 * instruction of the original immediate (and therefore, any address it
 * refers to is not meaningful).
 *
 * @return A copy of the immediate.
 */
std::shared_ptr<Immediate>
Immediate::copy() const {
    return std::make_shared<Immediate>(
        dynamic_cast<TerminalImmediate*>(value_->copy()), dst_->copy());
}
 
}