Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.compiler.amd64/src/com/oracle/graal/compiler/amd64/AMD64LIRGenerator.java @ 12656:9334392ed279
Refactor ConvertNode.
author | Roland Schatz <roland.schatz@oracle.com> |
---|---|
date | Mon, 04 Nov 2013 11:25:10 +0100 |
parents | 7328f7def427 |
children | 4aec62c32a82 |
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/* * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code 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 General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.compiler.amd64; import static com.oracle.graal.api.code.ValueUtil.*; import static com.oracle.graal.lir.amd64.AMD64Arithmetic.*; import static com.oracle.graal.lir.amd64.AMD64BitManipulationOp.IntrinsicOpcode.*; import static com.oracle.graal.lir.amd64.AMD64Compare.*; import static com.oracle.graal.lir.amd64.AMD64MathIntrinsicOp.IntrinsicOpcode.*; import com.oracle.graal.amd64.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.asm.*; import com.oracle.graal.asm.amd64.AMD64Address.Scale; import com.oracle.graal.asm.amd64.AMD64Assembler.ConditionFlag; import com.oracle.graal.compiler.gen.*; import com.oracle.graal.graph.*; import com.oracle.graal.lir.*; import com.oracle.graal.lir.StandardOp.JumpOp; import com.oracle.graal.lir.amd64.*; import com.oracle.graal.lir.amd64.AMD64Arithmetic.BinaryCommutative; import com.oracle.graal.lir.amd64.AMD64Arithmetic.BinaryRegConst; import com.oracle.graal.lir.amd64.AMD64Arithmetic.BinaryRegReg; import com.oracle.graal.lir.amd64.AMD64Arithmetic.BinaryRegStack; import com.oracle.graal.lir.amd64.AMD64Arithmetic.BinaryRegStackConst; import com.oracle.graal.lir.amd64.AMD64Arithmetic.DivRemOp; import com.oracle.graal.lir.amd64.AMD64Arithmetic.FPDivRemOp; import com.oracle.graal.lir.amd64.AMD64Arithmetic.Unary1Op; import com.oracle.graal.lir.amd64.AMD64Arithmetic.Unary2Op; import com.oracle.graal.lir.amd64.AMD64Compare.CompareOp; import com.oracle.graal.lir.amd64.AMD64ControlFlow.BranchOp; import com.oracle.graal.lir.amd64.AMD64ControlFlow.CondMoveOp; import com.oracle.graal.lir.amd64.AMD64ControlFlow.FloatBranchOp; import com.oracle.graal.lir.amd64.AMD64ControlFlow.FloatCondMoveOp; import com.oracle.graal.lir.amd64.AMD64ControlFlow.ReturnOp; import com.oracle.graal.lir.amd64.AMD64ControlFlow.SequentialSwitchOp; import com.oracle.graal.lir.amd64.AMD64ControlFlow.SwitchRangesOp; import com.oracle.graal.lir.amd64.AMD64ControlFlow.TableSwitchOp; import com.oracle.graal.lir.amd64.AMD64Move.LeaOp; import com.oracle.graal.lir.amd64.AMD64Move.MembarOp; import com.oracle.graal.lir.amd64.AMD64Move.MoveFromRegOp; import com.oracle.graal.lir.amd64.AMD64Move.MoveToRegOp; import com.oracle.graal.lir.amd64.AMD64Move.StackLeaOp; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.phases.util.*; /** * This class implements the AMD64 specific portion of the LIR generator. */ public abstract class AMD64LIRGenerator extends LIRGenerator { private static final RegisterValue RAX_I = AMD64.rax.asValue(Kind.Int); private static final RegisterValue RAX_L = AMD64.rax.asValue(Kind.Long); private static final RegisterValue RDX_I = AMD64.rdx.asValue(Kind.Int); private static final RegisterValue RDX_L = AMD64.rdx.asValue(Kind.Long); private static final RegisterValue RCX_I = AMD64.rcx.asValue(Kind.Int); private class AMD64SpillMoveFactory implements LIR.SpillMoveFactory { @Override public LIRInstruction createMove(AllocatableValue result, Value input) { return AMD64LIRGenerator.this.createMove(result, input); } } public AMD64LIRGenerator(StructuredGraph graph, Providers providers, FrameMap frameMap, CallingConvention cc, LIR lir) { super(graph, providers, frameMap, cc, lir); lir.spillMoveFactory = new AMD64SpillMoveFactory(); } @Override public boolean canStoreConstant(Constant c) { // there is no immediate move of 64-bit constants on Intel switch (c.getKind()) { case Long: return Util.isInt(c.asLong()) && !getCodeCache().needsDataPatch(c); case Double: return false; case Object: return c.isNull(); default: return true; } } @Override public boolean canInlineConstant(Constant c) { switch (c.getKind()) { case Long: return NumUtil.isInt(c.asLong()) && !getCodeCache().needsDataPatch(c); case Object: return c.isNull(); default: return true; } } @Override public Variable emitMove(Value input) { Variable result = newVariable(input.getPlatformKind()); emitMove(result, input); return result; } protected AMD64LIRInstruction createMove(AllocatableValue dst, Value src) { if (src instanceof AMD64AddressValue) { return new LeaOp(dst, (AMD64AddressValue) src); } else if (isRegister(src) || isStackSlot(dst)) { return new MoveFromRegOp(dst, src); } else { return new MoveToRegOp(dst, src); } } @Override public void emitMove(AllocatableValue dst, Value src) { append(createMove(dst, src)); } @Override public AMD64AddressValue emitAddress(Value base, long displacement, Value index, int scale) { AllocatableValue baseRegister; long finalDisp = displacement; if (isConstant(base)) { if (asConstant(base).isNull()) { baseRegister = Value.ILLEGAL; } else if (asConstant(base).getKind() != Kind.Object && !getCodeCache().needsDataPatch(asConstant(base))) { finalDisp += asConstant(base).asLong(); baseRegister = Value.ILLEGAL; } else { baseRegister = load(base); } } else { baseRegister = asAllocatable(base); } AllocatableValue indexRegister; Scale scaleEnum; if (!index.equals(Value.ILLEGAL) && scale != 0) { scaleEnum = Scale.fromInt(scale); if (isConstant(index)) { finalDisp += asConstant(index).asLong() * scale; indexRegister = Value.ILLEGAL; } else { indexRegister = asAllocatable(index); } } else { indexRegister = Value.ILLEGAL; scaleEnum = Scale.Times1; } int displacementInt; if (NumUtil.isInt(finalDisp)) { displacementInt = (int) finalDisp; } else { displacementInt = 0; AllocatableValue displacementRegister = load(Constant.forLong(finalDisp)); if (baseRegister.equals(Value.ILLEGAL)) { baseRegister = displacementRegister; } else if (indexRegister.equals(Value.ILLEGAL)) { indexRegister = displacementRegister; scaleEnum = Scale.Times1; } else { baseRegister = emitAdd(baseRegister, displacementRegister); } } return new AMD64AddressValue(target().wordKind, baseRegister, indexRegister, scaleEnum, displacementInt); } protected AMD64AddressValue asAddressValue(Value address) { if (address instanceof AMD64AddressValue) { return (AMD64AddressValue) address; } else { return emitAddress(address, 0, Value.ILLEGAL, 0); } } @Override public Variable emitAddress(StackSlot address) { Variable result = newVariable(target().wordKind); append(new StackLeaOp(result, address)); return result; } @Override public void emitJump(LabelRef label) { append(new JumpOp(label)); } @Override public void emitCompareBranch(Value left, Value right, Condition cond, boolean unorderedIsTrue, LabelRef label) { boolean mirrored = emitCompare(left, right); Condition finalCondition = mirrored ? cond.mirror() : cond; switch (left.getKind().getStackKind()) { case Int: case Long: case Object: append(new BranchOp(finalCondition, label)); break; case Float: case Double: append(new FloatBranchOp(finalCondition, unorderedIsTrue, label)); break; default: throw GraalInternalError.shouldNotReachHere("" + left.getKind()); } } @Override protected void emitIndirectCall(IndirectCallTargetNode callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState callState) { AllocatableValue targetAddress = AMD64.rax.asValue(); emitMove(targetAddress, operand(callTarget.computedAddress())); append(new AMD64Call.IndirectCallOp(callTarget.target(), result, parameters, temps, targetAddress, callState)); } @Override public void emitOverflowCheckBranch(LabelRef destination, boolean negated) { append(new BranchOp(negated ? ConditionFlag.NoOverflow : ConditionFlag.Overflow, destination)); } @Override public void emitIntegerTestBranch(Value left, Value right, boolean negated, LabelRef label) { emitIntegerTest(left, right); append(new BranchOp(negated ? Condition.NE : Condition.EQ, label)); } @Override public Variable emitConditionalMove(Value left, Value right, Condition cond, boolean unorderedIsTrue, Value trueValue, Value falseValue) { boolean mirrored = emitCompare(left, right); Condition finalCondition = mirrored ? cond.mirror() : cond; Variable result = newVariable(trueValue.getKind()); switch (left.getKind().getStackKind()) { case Int: case Long: case Object: append(new CondMoveOp(result, finalCondition, load(trueValue), loadNonConst(falseValue))); break; case Float: case Double: append(new FloatCondMoveOp(result, finalCondition, unorderedIsTrue, load(trueValue), load(falseValue))); break; default: throw GraalInternalError.shouldNotReachHere("" + left.getKind()); } return result; } @Override public Variable emitIntegerTestMove(Value left, Value right, Value trueValue, Value falseValue) { emitIntegerTest(left, right); Variable result = newVariable(trueValue.getKind()); append(new CondMoveOp(result, Condition.EQ, load(trueValue), loadNonConst(falseValue))); return result; } private void emitIntegerTest(Value a, Value b) { assert a.getKind().getStackKind() == Kind.Int || a.getKind() == Kind.Long; if (LIRValueUtil.isVariable(b)) { append(new AMD64TestOp(load(b), loadNonConst(a))); } else { append(new AMD64TestOp(load(a), loadNonConst(b))); } } /** * This method emits the compare instruction, and may reorder the operands. It returns true if * it did so. * * @param a the left operand of the comparison * @param b the right operand of the comparison * @return true if the left and right operands were switched, false otherwise */ private boolean emitCompare(Value a, Value b) { Variable left; Value right; boolean mirrored; if (LIRValueUtil.isVariable(b)) { left = load(b); right = loadNonConst(a); mirrored = true; } else { left = load(a); right = loadNonConst(b); mirrored = false; } switch (left.getKind().getStackKind()) { case Int: append(new CompareOp(ICMP, left, right)); break; case Long: append(new CompareOp(LCMP, left, right)); break; case Object: append(new CompareOp(ACMP, left, right)); break; case Float: append(new CompareOp(FCMP, left, right)); break; case Double: append(new CompareOp(DCMP, left, right)); break; default: throw GraalInternalError.shouldNotReachHere(); } return mirrored; } @Override public void emitNullCheck(ValueNode v, DeoptimizingNode deoping) { assert v.kind() == Kind.Object; append(new AMD64Move.NullCheckOp(load(operand(v)), state(deoping))); } @Override public Variable emitNegate(Value inputVal) { AllocatableValue input = asAllocatable(inputVal); Variable result = newVariable(input.getKind()); switch (input.getKind()) { case Int: append(new Unary1Op(INEG, result, input)); break; case Long: append(new Unary1Op(LNEG, result, input)); break; case Float: append(new BinaryRegConst(FXOR, result, input, Constant.forFloat(Float.intBitsToFloat(0x80000000)))); break; case Double: append(new BinaryRegConst(DXOR, result, input, Constant.forDouble(Double.longBitsToDouble(0x8000000000000000L)))); break; default: throw GraalInternalError.shouldNotReachHere(); } return result; } @Override public Variable emitNot(Value inputVal) { AllocatableValue input = asAllocatable(inputVal); Variable result = newVariable(input.getKind()); switch (input.getKind()) { case Int: append(new Unary1Op(INOT, result, input)); break; case Long: append(new Unary1Op(LNOT, result, input)); break; default: throw GraalInternalError.shouldNotReachHere(); } return result; } private Variable emitBinary(AMD64Arithmetic op, boolean commutative, Value a, Value b) { if (isConstant(b)) { return emitBinaryConst(op, commutative, asAllocatable(a), asConstant(b)); } else if (commutative && isConstant(a)) { return emitBinaryConst(op, commutative, asAllocatable(b), asConstant(a)); } else { return emitBinaryVar(op, commutative, asAllocatable(a), asAllocatable(b)); } } private Variable emitBinaryConst(AMD64Arithmetic op, boolean commutative, AllocatableValue a, Constant b) { switch (op) { case IADD: case LADD: case ISUB: case LSUB: case IAND: case LAND: case IOR: case LOR: case IXOR: case LXOR: if (NumUtil.isInt(b.asLong())) { Variable result = newVariable(a.getKind()); append(new BinaryRegConst(op, result, a, b)); return result; } break; case IMUL: case LMUL: if (NumUtil.isInt(b.asLong())) { Variable result = newVariable(a.getKind()); append(new BinaryRegStackConst(op, result, a, b)); return result; } break; } return emitBinaryVar(op, commutative, a, asAllocatable(b)); } private Variable emitBinaryVar(AMD64Arithmetic op, boolean commutative, AllocatableValue a, AllocatableValue b) { Variable result = newVariable(a.getKind()); if (commutative) { append(new BinaryCommutative(op, result, a, b)); } else { append(new BinaryRegStack(op, result, a, b)); } return result; } @Override public Variable emitAdd(Value a, Value b) { switch (a.getKind().getStackKind()) { case Int: return emitBinary(IADD, true, a, b); case Long: return emitBinary(LADD, true, a, b); case Float: return emitBinary(FADD, true, a, b); case Double: return emitBinary(DADD, true, a, b); default: throw GraalInternalError.shouldNotReachHere(); } } @Override public Variable emitSub(Value a, Value b) { switch (a.getKind().getStackKind()) { case Int: return emitBinary(ISUB, false, a, b); case Long: return emitBinary(LSUB, false, a, b); case Float: return emitBinary(FSUB, false, a, b); case Double: return emitBinary(DSUB, false, a, b); default: throw GraalInternalError.shouldNotReachHere(); } } @Override public Variable emitMul(Value a, Value b) { switch (a.getKind().getStackKind()) { case Int: return emitBinary(IMUL, true, a, b); case Long: return emitBinary(LMUL, true, a, b); case Float: return emitBinary(FMUL, true, a, b); case Double: return emitBinary(DMUL, true, a, b); default: throw GraalInternalError.shouldNotReachHere(); } } @Override protected boolean peephole(ValueNode valueNode) { if ((valueNode instanceof IntegerDivNode) || (valueNode instanceof IntegerRemNode)) { FixedBinaryNode divRem = (FixedBinaryNode) valueNode; FixedNode node = divRem.next(); while (node instanceof FixedWithNextNode) { FixedWithNextNode fixedWithNextNode = (FixedWithNextNode) node; if (((fixedWithNextNode instanceof IntegerDivNode) || (fixedWithNextNode instanceof IntegerRemNode)) && fixedWithNextNode.getClass() != divRem.getClass()) { FixedBinaryNode otherDivRem = (FixedBinaryNode) fixedWithNextNode; if (otherDivRem.x() == divRem.x() && otherDivRem.y() == divRem.y() && operand(otherDivRem) == null) { Value[] results = emitIntegerDivRem(operand(divRem.x()), operand(divRem.y()), (DeoptimizingNode) valueNode); if (divRem instanceof IntegerDivNode) { setResult(divRem, results[0]); setResult(otherDivRem, results[1]); } else { setResult(divRem, results[1]); setResult(otherDivRem, results[0]); } return true; } } node = fixedWithNextNode.next(); } } return false; } private void emitDivRem(AMD64Arithmetic op, Value a, Value b, LIRFrameState state) { AllocatableValue rax = AMD64.rax.asValue(a.getPlatformKind()); emitMove(rax, a); append(new DivRemOp(op, rax, asAllocatable(b), state)); } public Value[] emitIntegerDivRem(Value a, Value b, DeoptimizingNode deopting) { LIRFrameState state = state(deopting); switch (a.getKind().getStackKind()) { case Int: emitDivRem(IDIVREM, a, b, state); return new Value[]{emitMove(RAX_I), emitMove(RDX_I)}; case Long: emitDivRem(LDIVREM, a, b, state); return new Value[]{emitMove(RAX_L), emitMove(RDX_L)}; default: throw GraalInternalError.shouldNotReachHere(); } } @Override public Value emitDiv(Value a, Value b, DeoptimizingNode deopting) { switch (a.getKind().getStackKind()) { case Int: emitDivRem(IDIV, a, b, state(deopting)); return emitMove(RAX_I); case Long: emitDivRem(LDIV, a, b, state(deopting)); return emitMove(RAX_L); case Float: { Variable result = newVariable(a.getPlatformKind()); append(new BinaryRegStack(FDIV, result, asAllocatable(a), asAllocatable(b))); return result; } case Double: { Variable result = newVariable(a.getPlatformKind()); append(new BinaryRegStack(DDIV, result, asAllocatable(a), asAllocatable(b))); return result; } default: throw GraalInternalError.shouldNotReachHere(); } } @Override public Value emitRem(Value a, Value b, DeoptimizingNode deopting) { switch (a.getKind().getStackKind()) { case Int: emitDivRem(IREM, a, b, state(deopting)); return emitMove(RDX_I); case Long: emitDivRem(LREM, a, b, state(deopting)); return emitMove(RDX_L); case Float: { Variable result = newVariable(a.getPlatformKind()); append(new FPDivRemOp(FREM, result, load(a), load(b))); return result; } case Double: { Variable result = newVariable(a.getPlatformKind()); append(new FPDivRemOp(DREM, result, load(a), load(b))); return result; } default: throw GraalInternalError.shouldNotReachHere(); } } @Override public Variable emitUDiv(Value a, Value b, DeoptimizingNode deopting) { LIRFrameState state = state(deopting); switch (a.getKind().getStackKind()) { case Int: emitDivRem(IUDIV, a, b, state); return emitMove(RAX_I); case Long: emitDivRem(LUDIV, a, b, state); return emitMove(RAX_L); default: throw GraalInternalError.shouldNotReachHere(); } } @Override public Variable emitURem(Value a, Value b, DeoptimizingNode deopting) { LIRFrameState state = state(deopting); switch (a.getKind().getStackKind()) { case Int: emitDivRem(IUREM, a, b, state); return emitMove(RDX_I); case Long: emitDivRem(LUREM, a, b, state); return emitMove(RDX_L); default: throw GraalInternalError.shouldNotReachHere(); } } @Override public Variable emitAnd(Value a, Value b) { switch (a.getKind().getStackKind()) { case Int: return emitBinary(IAND, true, a, b); case Long: return emitBinary(LAND, true, a, b); default: throw GraalInternalError.shouldNotReachHere(); } } @Override public Variable emitOr(Value a, Value b) { switch (a.getKind().getStackKind()) { case Int: return emitBinary(IOR, true, a, b); case Long: return emitBinary(LOR, true, a, b); default: throw GraalInternalError.shouldNotReachHere(); } } @Override public Variable emitXor(Value a, Value b) { switch (a.getKind().getStackKind()) { case Int: return emitBinary(IXOR, true, a, b); case Long: return emitBinary(LXOR, true, a, b); default: throw GraalInternalError.shouldNotReachHere(); } } private Variable emitShift(AMD64Arithmetic op, Value a, Value b) { Variable result = newVariable(a.getPlatformKind()); AllocatableValue input = asAllocatable(a); if (isConstant(b)) { append(new BinaryRegConst(op, result, input, asConstant(b))); } else { emitMove(RCX_I, b); append(new BinaryRegReg(op, result, input, RCX_I)); } return result; } @Override public Variable emitShl(Value a, Value b) { switch (a.getKind().getStackKind()) { case Int: return emitShift(ISHL, a, b); case Long: return emitShift(LSHL, a, b); default: throw GraalInternalError.shouldNotReachHere(); } } @Override public Variable emitShr(Value a, Value b) { switch (a.getKind().getStackKind()) { case Int: return emitShift(ISHR, a, b); case Long: return emitShift(LSHR, a, b); default: throw GraalInternalError.shouldNotReachHere(); } } @Override public Variable emitUShr(Value a, Value b) { switch (a.getKind().getStackKind()) { case Int: return emitShift(IUSHR, a, b); case Long: return emitShift(LUSHR, a, b); default: throw GraalInternalError.shouldNotReachHere(); } } private AllocatableValue emitConvertMove(Kind kind, AllocatableValue input) { Variable result = newVariable(kind); emitMove(result, input); return result; } private AllocatableValue emitConvert1Op(Kind kind, AMD64Arithmetic op, AllocatableValue input) { Variable result = newVariable(kind); append(new Unary1Op(op, result, input)); return result; } private AllocatableValue emitConvert2Op(Kind kind, AMD64Arithmetic op, AllocatableValue input) { Variable result = newVariable(kind); append(new Unary2Op(op, result, input)); return result; } @Override public AllocatableValue emitConvert(Kind from, Kind to, Value inputVal) { assert inputVal.getKind() == from.getStackKind(); AllocatableValue input = asAllocatable(inputVal); if (from == to) { return input; } switch (to) { case Byte: switch (from) { case Short: case Char: case Int: case Long: return emitConvert2Op(to, I2B, input); case Float: case Double: AllocatableValue intVal = emitConvert(from, Kind.Int, inputVal); return emitConvert(Kind.Int, to, intVal); } break; case Char: switch (from) { case Byte: case Short: case Int: case Long: return emitConvert1Op(to, I2C, input); case Float: case Double: AllocatableValue intVal = emitConvert(from, Kind.Int, inputVal); return emitConvert(Kind.Int, to, intVal); } break; case Short: switch (from) { case Byte: case Char: case Int: case Long: return emitConvert2Op(to, I2S, input); case Float: case Double: AllocatableValue intVal = emitConvert(from, Kind.Int, inputVal); return emitConvert(Kind.Int, to, intVal); } break; case Int: switch (from) { case Byte: case Short: case Char: return emitConvertMove(to, input); case Long: return emitConvert1Op(to, L2I, input); case Float: return emitConvert2Op(to, F2I, input); case Double: return emitConvert2Op(to, D2I, input); } break; case Long: switch (from) { case Byte: case Short: case Char: case Int: return emitConvert2Op(to, I2L, input); case Float: return emitConvert2Op(to, F2L, input); case Double: return emitConvert2Op(to, D2L, input); } break; case Float: switch (from) { case Byte: case Short: case Char: case Int: return emitConvert2Op(to, I2F, input); case Long: return emitConvert2Op(to, L2F, input); case Double: return emitConvert2Op(to, D2F, input); } break; case Double: switch (from) { case Byte: case Short: case Char: case Int: return emitConvert2Op(to, I2D, input); case Long: return emitConvert2Op(to, L2D, input); case Float: return emitConvert2Op(to, F2D, input); } break; } throw GraalInternalError.shouldNotReachHere(); } public AllocatableValue emitReinterpret(Kind to, Value inputVal) { Kind from = inputVal.getKind(); AllocatableValue input = asAllocatable(inputVal); // These cases require a move between CPU and FPU registers: switch (to) { case Int: switch (from) { case Float: case Double: return emitConvert2Op(to, MOV_F2I, input); } break; case Long: switch (from) { case Float: case Double: return emitConvert2Op(to, MOV_D2L, input); } break; case Float: switch (from) { case Int: case Long: return emitConvert2Op(to, MOV_I2F, input); } break; case Double: switch (from) { case Int: case Long: return emitConvert2Op(to, MOV_L2D, input); } break; } // Otherwise, just emit an ordinary move instruction. // Instructions that move or generate 32-bit register values also set the upper 32 // bits of the register to zero. // Consequently, there is no need for a special zero-extension move. return emitConvertMove(to, input); } @Override public void emitMembar(int barriers) { int necessaryBarriers = target().arch.requiredBarriers(barriers); if (target().isMP && necessaryBarriers != 0) { append(new MembarOp(necessaryBarriers)); } } @Override protected void emitForeignCall(ForeignCallLinkage linkage, Value result, Value[] arguments, Value[] temps, LIRFrameState info) { long maxOffset = linkage.getMaxCallTargetOffset(); if (maxOffset != (int) maxOffset) { append(new AMD64Call.DirectFarForeignCallOp(this, linkage, result, arguments, temps, info)); } else { append(new AMD64Call.DirectNearForeignCallOp(linkage, result, arguments, temps, info)); } } @Override public void emitBitCount(Variable result, Value value) { if (value.getKind().getStackKind() == Kind.Int) { append(new AMD64BitManipulationOp(IPOPCNT, result, asAllocatable(value))); } else { append(new AMD64BitManipulationOp(LPOPCNT, result, asAllocatable(value))); } } @Override public void emitBitScanForward(Variable result, Value value) { append(new AMD64BitManipulationOp(BSF, result, asAllocatable(value))); } @Override public void emitBitScanReverse(Variable result, Value value) { if (value.getKind().getStackKind() == Kind.Int) { append(new AMD64BitManipulationOp(IBSR, result, asAllocatable(value))); } else { append(new AMD64BitManipulationOp(LBSR, result, asAllocatable(value))); } } @Override public Value emitMathAbs(Value input) { Variable result = newVariable(input.getPlatformKind()); append(new BinaryRegConst(DAND, result, asAllocatable(input), Constant.forDouble(Double.longBitsToDouble(0x7FFFFFFFFFFFFFFFL)))); return result; } @Override public Value emitMathSqrt(Value input) { Variable result = newVariable(input.getPlatformKind()); append(new Unary2Op(SQRT, result, asAllocatable(input))); return result; } @Override public Value emitMathLog(Value input, boolean base10) { Variable result = newVariable(input.getPlatformKind()); append(new AMD64MathIntrinsicOp(base10 ? LOG10 : LOG, result, asAllocatable(input))); return result; } @Override public Value emitMathCos(Value input) { Variable result = newVariable(input.getPlatformKind()); append(new AMD64MathIntrinsicOp(COS, result, asAllocatable(input))); return result; } @Override public Value emitMathSin(Value input) { Variable result = newVariable(input.getPlatformKind()); append(new AMD64MathIntrinsicOp(SIN, result, asAllocatable(input))); return result; } @Override public Value emitMathTan(Value input) { Variable result = newVariable(input.getPlatformKind()); append(new AMD64MathIntrinsicOp(TAN, result, asAllocatable(input))); return result; } @Override public void emitByteSwap(Variable result, Value input) { append(new AMD64ByteSwapOp(result, input)); } @Override protected void emitReturn(Value input) { append(new ReturnOp(input)); } @Override protected void emitSequentialSwitch(Constant[] keyConstants, LabelRef[] keyTargets, LabelRef defaultTarget, Value key) { // Making a copy of the switch value is necessary because jump table destroys the input // value if (key.getKind() == Kind.Int || key.getKind() == Kind.Long) { append(new SequentialSwitchOp(keyConstants, keyTargets, defaultTarget, key, Value.ILLEGAL)); } else { assert key.getKind() == Kind.Object : key.getKind(); append(new SequentialSwitchOp(keyConstants, keyTargets, defaultTarget, key, newVariable(Kind.Object))); } } @Override protected void emitSwitchRanges(int[] lowKeys, int[] highKeys, LabelRef[] targets, LabelRef defaultTarget, Value key) { append(new SwitchRangesOp(lowKeys, highKeys, targets, defaultTarget, key)); } @Override protected void emitTableSwitch(int lowKey, LabelRef defaultTarget, LabelRef[] targets, Value key) { // Making a copy of the switch value is necessary because jump table destroys the input // value Variable tmp = emitMove(key); append(new TableSwitchOp(lowKey, defaultTarget, targets, tmp, newVariable(target().wordKind))); } @Override public void visitBreakpointNode(BreakpointNode node) { JavaType[] sig = new JavaType[node.arguments().size()]; for (int i = 0; i < sig.length; i++) { sig[i] = node.arguments().get(i).stamp().javaType(getMetaAccess()); } Value[] parameters = visitInvokeArguments(frameMap.registerConfig.getCallingConvention(CallingConvention.Type.JavaCall, null, sig, target(), false), node.arguments()); append(new AMD64BreakpointOp(parameters)); } @Override public void visitInfopointNode(InfopointNode i) { append(new InfopointOp(stateFor(i.getState()), i.reason)); } }