TerminalInstructionReference.cc

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/*
    Copyright (c) 2002-2011 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the "Software"),
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    the rights to use, copy, modify, merge, publish, distribute, sublicense,
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    Software is furnished to do so, subject to the following conditions:
 
    The above copyright notice and this permission notice shall be included in
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    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 */
/**
 * @file TerminalInstructionAddress.cc
 *
 * Implementation of TerminalInstructionAddress class.
 *
 * @author Ari Metsähalme 2005 (ari.metsahalme-no.spam-tut.fi)
 * @author Pekka Jääskeläinen 2011
 * @note rating: red
 */
 
#include "TerminalInstructionReference.hh"
#include "InstructionReference.hh"
#include "Instruction.hh"
#include "TerminalBasicBlockReference.hh"
#include "BasicBlock.hh"
 
using namespace TTAMachine;
 
namespace TTAProgram {
 
/**
 * The constructor.
 *
 * @param value The value of the inline immediate (the address).
 * @param space The address space of the address the immediate refers to.
 * @param ref The instruction this address refers to.
 */
TerminalInstructionReference::TerminalInstructionReference(
    InstructionReference ref) : TerminalInstructionAddress(), ref_(ref) {
}
 
/**
 * The destructor.
 */
TerminalInstructionReference::~TerminalInstructionReference() {
}
 
/**
 * Returns the value of the immediate (instruction address).
 *
 * @return The value of the immediate (instruction address).
 */
Address
TerminalInstructionReference::address() const {
    return ref_.instruction().address();
}
 
/**
 * Returns a reference to the instruction to which the immediate points.
 *
 * @return A reference to the instruction to which the immediate points.
 * @exception WrongSubclass never.
 */
const InstructionReference&
TerminalInstructionReference::instructionReference() const {
    return ref_;
}
 
/**
 * Returns a reference to the instruction to which the immediate points.
 *
 * @return A reference to the instruction to which the immediate points.
 * @exception WrongSubclass never.
 */
InstructionReference&
TerminalInstructionReference::instructionReference() {
    return ref_;
}
 
/**
 * Set a new referred instruction.
 *
 * @param ref The new instruction reference.
 * @exception WrongSubclass never.
 */
void
TerminalInstructionReference::setInstructionReference(
    InstructionReference ref) {
    ref_ = ref;
}
 
/**
 * Creates an exact copy of the terminal and returns it.
 *
 * @return A copy of the terminal.
 */
Terminal*
TerminalInstructionReference::copy() const {
    return new TerminalInstructionReference(ref_);
}
 
/**
 * Checks if terminals are equal.
 *
 * @param other Terminal to compare.
 * @return true if terminals are equal.
 */
bool 
TerminalInstructionReference::equals(const Terminal& other) const {
 
    const TerminalBasicBlockReference* otherBBRef =
        dynamic_cast<const TerminalBasicBlockReference*>(&other);
    if (otherBBRef) {
        const BasicBlock& bb = otherBBRef->basicBlock();
        return &ref_.instruction() == &(bb.firstInstruction());
    }
 
    const TerminalInstructionReference* otherInsRef =
        dynamic_cast<const TerminalInstructionReference*>(&other);
    if (otherInsRef) {
        return otherInsRef->instructionReference() ==
            ref_;
    }
    return false;
}
 
}