/*
* This file is part of the Jikes RVM project (http://jikesrvm.org).
*
* This file is licensed to You under the Eclipse Public License (EPL);
* You may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership.
*/
package org.jikesrvm.compilers.opt.bc2ir.ppc;
import org.jikesrvm.classloader.Atom;
import org.jikesrvm.classloader.MethodReference;
import org.jikesrvm.classloader.TypeReference;
import org.jikesrvm.compilers.opt.MagicNotImplementedException;
import org.jikesrvm.compilers.opt.bc2ir.BC2IR;
import org.jikesrvm.compilers.opt.bc2ir.GenerationContext;
import org.jikesrvm.compilers.opt.ir.Binary;
import org.jikesrvm.compilers.opt.ir.CacheOp;
import org.jikesrvm.compilers.opt.ir.Empty;
import org.jikesrvm.compilers.opt.ir.Load;
import org.jikesrvm.compilers.opt.ir.Operators;
import org.jikesrvm.compilers.opt.ir.Store;
import org.jikesrvm.compilers.opt.ir.operand.AddressConstantOperand;
import org.jikesrvm.compilers.opt.ir.operand.IntConstantOperand;
import org.jikesrvm.compilers.opt.ir.operand.Operand;
import org.jikesrvm.compilers.opt.ir.operand.RegisterOperand;
import org.jikesrvm.ppc.StackframeLayoutConstants;
import org.jikesrvm.runtime.MagicNames;
import org.vmmagic.unboxed.Offset;
/**
* This class implements the machine-specific magics for the opt compiler.
*
* @see org.jikesrvm.compilers.opt.ir.GenerateMagic for the machine-independent magics.
*/
public abstract class GenerateMachineSpecificMagic implements Operators, StackframeLayoutConstants {
/**
* "Semantic inlining" of methods of the Magic class
* Based on the methodName, generate a sequence of opt instructions
* that implement the magic, updating the stack as necessary
*
* @param bc2ir the bc2ir object that is generating the
* ir containing this magic
* @param gc == bc2ir.gc
* @param meth the RVMMethod that is the magic method
*/
public static boolean generateMagic(BC2IR bc2ir, GenerationContext gc, MethodReference meth)
throws MagicNotImplementedException {
Atom methodName = meth.getName();
if (methodName == MagicNames.getFramePointer) {
bc2ir.push(gc.temps.makeFPOp());
gc.allocFrame = true;
} else if (methodName == MagicNames.getTocPointer) {
bc2ir.push(gc.temps.makeJTOCOp(null, null));
} else if (methodName == MagicNames.getJTOC) {
bc2ir.push(gc.temps.makeTocOp());
} else if (methodName == MagicNames.getCallerFramePointer) {
Operand fp = bc2ir.popAddress();
RegisterOperand val = gc.temps.makeTemp(TypeReference.Address);
bc2ir.appendInstruction(Load.create(REF_LOAD,
val,
fp,
new AddressConstantOperand(Offset.fromIntSignExtend(
STACKFRAME_FRAME_POINTER_OFFSET)),
null));
bc2ir.push(val.copyD2U());
} else if (methodName == MagicNames.setCallerFramePointer) {
Operand val = bc2ir.popAddress();
Operand fp = bc2ir.popAddress();
bc2ir.appendInstruction(Store.create(REF_STORE,
val,
fp,
new AddressConstantOperand(Offset.fromIntSignExtend(
STACKFRAME_FRAME_POINTER_OFFSET)),
null));
} else if (methodName == MagicNames.getCompiledMethodID) {
Operand fp = bc2ir.popAddress();
RegisterOperand val = gc.temps.makeTempInt();
bc2ir.appendInstruction(Load.create(INT_LOAD,
val,
fp,
new AddressConstantOperand(Offset.fromIntSignExtend(
STACKFRAME_METHOD_ID_OFFSET)),
null));
bc2ir.push(val.copyD2U());
} else if (methodName == MagicNames.setCompiledMethodID) {
Operand val = bc2ir.popInt();
Operand fp = bc2ir.popAddress();
bc2ir.appendInstruction(Store.create(INT_STORE,
val,
fp,
new AddressConstantOperand(Offset.fromIntSignExtend(
STACKFRAME_METHOD_ID_OFFSET)),
null));
} else if (methodName == MagicNames.getNextInstructionAddress) {
Operand fp = bc2ir.popAddress();
RegisterOperand val = gc.temps.makeTemp(TypeReference.Address);
bc2ir.appendInstruction(Load.create(REF_LOAD,
val,
fp,
new AddressConstantOperand(Offset.fromIntSignExtend(
STACKFRAME_NEXT_INSTRUCTION_OFFSET)),
null));
bc2ir.push(val.copyD2U());
} else if (methodName == MagicNames.getReturnAddressLocation) {
Operand fp = bc2ir.popAddress();
RegisterOperand callerFP = gc.temps.makeTemp(TypeReference.Address);
RegisterOperand val = gc.temps.makeTemp(TypeReference.Address);
bc2ir.appendInstruction(Load.create(REF_LOAD,
callerFP,
fp,
new AddressConstantOperand(Offset.fromIntSignExtend(
STACKFRAME_FRAME_POINTER_OFFSET)),
null));
bc2ir.appendInstruction(Binary.create(REF_ADD,
val,
callerFP.copyRO(),
new IntConstantOperand(STACKFRAME_NEXT_INSTRUCTION_OFFSET)));
bc2ir.push(val.copyD2U());
} else if (methodName == MagicNames.isync) {
bc2ir.appendInstruction(Empty.create(READ_CEILING));
} else if (methodName == MagicNames.sync) {
bc2ir.appendInstruction(Empty.create(WRITE_FLOOR));
} else if (methodName == MagicNames.pause) {
// IA-specific
} else if (methodName == MagicNames.dcbst) {
bc2ir.appendInstruction(CacheOp.create(DCBST, bc2ir.popInt()));
} else if (methodName == MagicNames.dcbt) {
bc2ir.appendInstruction(CacheOp.create(DCBT, bc2ir.popInt()));
} else if (methodName == MagicNames.dcbtst) {
bc2ir.appendInstruction(CacheOp.create(DCBTST, bc2ir.popInt()));
} else if (methodName == MagicNames.dcbz) {
bc2ir.appendInstruction(CacheOp.create(DCBZ, bc2ir.popInt()));
} else if (methodName == MagicNames.dcbzl) {
bc2ir.appendInstruction(CacheOp.create(DCBZL, bc2ir.popInt()));
} else if (methodName == MagicNames.icbi) {
bc2ir.appendInstruction(CacheOp.create(ICBI, bc2ir.popInt()));
} else {
// Distinguish between magics that we know we don't implement
// (and never plan to implement) and those (usually new ones)
// that we want to be warned that we don't implement.
String msg = "Magic method not implemented: " + meth;
if (methodName == MagicNames.returnToNewStack) {
throw MagicNotImplementedException.EXPECTED(msg);
} else {
return false;
// throw MagicNotImplementedException.UNEXPECTED(msg);
}
}
return true;
}
}