/*
* $Id$
*
* Copyright (C) 2003-2015 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.vm.x86.compiler.l2;
import org.jnode.assembler.x86.X86Register;
import org.jnode.vm.compiler.ir.Operand;
import org.jnode.vm.compiler.ir.RegisterPool;
import org.jnode.vm.objects.BootableArrayList;
/**
* @author Madhu Siddalingaiah
* @author Levente S\u00e1ntha
*/
public class X86RegisterPool extends RegisterPool<X86Register> {
private final BootableArrayList<X86Register> registers;
public X86RegisterPool() {
registers = new BootableArrayList<X86Register>();
//registers.add(X86Register.EDX); - long return
registers.add(X86Register.ECX);
registers.add(X86Register.EBX);
//registers.add(X86Register.EAX);
registers.add(X86Register.ESI);
//registers.add(X86Register.EDI);
// // not sure what to do with ESI and EDI just yet...
}
public X86Register request(int type) {
if (type == Operand.LONG) {
return null;
}
if (/* type == Operand.FLOAT || */type == Operand.DOUBLE) {
// throw new IllegalArgumentException("floats and double not yet
// supported");
return null;
}
int size = registers.size();
if (size == 0) {
return null;
} else {
return registers.remove(size - 1);
}
}
public void release(X86Register register) {
registers.add(register);
}
public boolean supports3AddrOps() {
return false;
}
}