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view graal/com.oracle.graal.lir.amd64/src/com/oracle/graal/lir/amd64/AMD64Compare.java @ 19001:5a79fa76b489
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author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Wed, 28 Jan 2015 04:05:07 +0100 |
parents | 9619ba4daf4c |
children | 8fc336a04d77 |
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/* * Copyright (c) 2011, 2014, 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.lir.amd64; import static com.oracle.graal.api.code.ValueUtil.*; import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.asm.*; import com.oracle.graal.asm.amd64.*; import com.oracle.graal.compiler.common.*; import com.oracle.graal.lir.*; import com.oracle.graal.lir.amd64.AMD64Move.MemOp; import com.oracle.graal.lir.asm.*; public enum AMD64Compare { BCMP, SCMP, ICMP, LCMP, ACMP, FCMP, DCMP; public static class CompareOp extends AMD64LIRInstruction { @Opcode private final AMD64Compare opcode; @Use({REG}) protected Value x; @Use({REG, STACK, CONST}) protected Value y; public CompareOp(AMD64Compare opcode, Value x, Value y) { this.opcode = opcode; this.x = x; this.y = y; } @Override public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) { emit(crb, masm, opcode, x, y); } @Override public void verify() { super.verify(); assert (name().startsWith("B") && x.getKind().getStackKind() == Kind.Int && y.getKind().getStackKind() == Kind.Int) || (name().startsWith("S") && x.getKind().getStackKind() == Kind.Int && y.getKind().getStackKind() == Kind.Int) || (name().startsWith("I") && x.getKind() == Kind.Int && y.getKind() == Kind.Int) || (name().startsWith("L") && x.getKind() == Kind.Long && y.getKind() == Kind.Long) || (name().startsWith("A") && x.getKind() == Kind.Object && y.getKind() == Kind.Object) || (name().startsWith("F") && x.getKind() == Kind.Float && y.getKind() == Kind.Float) || (name().startsWith("D") && x.getKind() == Kind.Double && y.getKind() == Kind.Double) : String.format( "%s(%s, %s)", opcode, x, y); } } public static class CompareMemoryOp extends MemOp { @Opcode private final AMD64Compare opcode; @Use({REG, CONST}) protected Value y; /** * Compare memory, constant or register, memory. */ public CompareMemoryOp(AMD64Compare opcode, Kind kind, AMD64AddressValue address, Value y, LIRFrameState state) { super(kind, address, state); this.opcode = opcode; this.y = y; } @Override protected void emitMemAccess(CompilationResultBuilder crb, AMD64MacroAssembler masm) { if (isRegister(y)) { switch (opcode) { case BCMP: masm.cmpb(asIntReg(y), address.toAddress()); break; case SCMP: masm.cmpw(asIntReg(y), address.toAddress()); break; case ICMP: masm.cmpl(asIntReg(y), address.toAddress()); break; case LCMP: masm.cmpq(asLongReg(y), address.toAddress()); break; case ACMP: masm.cmpptr(asObjectReg(y), address.toAddress()); break; case FCMP: masm.ucomiss(asFloatReg(y), address.toAddress()); break; case DCMP: masm.ucomisd(asDoubleReg(y), address.toAddress()); break; default: throw GraalInternalError.shouldNotReachHere(); } } else if (isConstant(y)) { switch (opcode) { case BCMP: masm.cmpb(address.toAddress(), crb.asIntConst(y)); break; case SCMP: masm.cmpw(address.toAddress(), crb.asIntConst(y)); break; case ICMP: masm.cmpl(address.toAddress(), crb.asIntConst(y)); break; case LCMP: if (NumUtil.isInt(crb.asLongConst(y))) { masm.cmpq(address.toAddress(), (int) crb.asLongConst(y)); } else { throw GraalInternalError.shouldNotReachHere(); } break; case ACMP: if (asConstant(y).isNull()) { masm.cmpq(address.toAddress(), 0); } else { throw GraalInternalError.shouldNotReachHere(); } break; default: throw GraalInternalError.shouldNotReachHere(); } } else { throw GraalInternalError.shouldNotReachHere(); } } @Override public void verify() { super.verify(); assert y instanceof Variable || y instanceof JavaConstant; assert kind != Kind.Long || !(y instanceof JavaConstant) || NumUtil.isInt(((JavaConstant) y).asLong()); } } public static void emit(CompilationResultBuilder crb, AMD64MacroAssembler masm, AMD64Compare opcode, Value x, Value y) { if (isRegister(x) && isRegister(y)) { switch (opcode) { case BCMP: masm.cmpb(asIntReg(x), asIntReg(y)); break; case SCMP: masm.cmpw(asIntReg(x), asIntReg(y)); break; case ICMP: masm.cmpl(asIntReg(x), asIntReg(y)); break; case LCMP: masm.cmpq(asLongReg(x), asLongReg(y)); break; case ACMP: masm.cmpptr(asObjectReg(x), asObjectReg(y)); break; case FCMP: masm.ucomiss(asFloatReg(x), asFloatReg(y)); break; case DCMP: masm.ucomisd(asDoubleReg(x), asDoubleReg(y)); break; default: throw GraalInternalError.shouldNotReachHere(); } } else if (isRegister(x) && isConstant(y)) { boolean isZero = ((JavaConstant) y).isDefaultForKind(); switch (opcode) { case BCMP: if (isZero) { masm.testl(asIntReg(x), asIntReg(x)); } else { masm.cmpb(asIntReg(x), crb.asIntConst(y)); } break; case SCMP: if (isZero) { masm.testl(asIntReg(x), asIntReg(x)); } else { masm.cmpw(asIntReg(x), crb.asIntConst(y)); } break; case ICMP: if (isZero) { masm.testl(asIntReg(x), asIntReg(x)); } else { masm.cmpl(asIntReg(x), crb.asIntConst(y)); } break; case LCMP: if (isZero) { masm.testq(asLongReg(x), asLongReg(x)); } else { masm.cmpq(asLongReg(x), crb.asIntConst(y)); } break; case ACMP: if (isZero) { masm.testq(asObjectReg(x), asObjectReg(x)); break; } else { throw GraalInternalError.shouldNotReachHere("Only null object constants are allowed in comparisons"); } case FCMP: masm.ucomiss(asFloatReg(x), (AMD64Address) crb.asFloatConstRef(y)); break; case DCMP: masm.ucomisd(asDoubleReg(x), (AMD64Address) crb.asDoubleConstRef(y)); break; default: throw GraalInternalError.shouldNotReachHere(); } } else if (isRegister(x) && isStackSlot(y)) { switch (opcode) { case BCMP: masm.cmpb(asIntReg(x), (AMD64Address) crb.asByteAddr(y)); break; case SCMP: masm.cmpw(asIntReg(x), (AMD64Address) crb.asShortAddr(y)); break; case ICMP: masm.cmpl(asIntReg(x), (AMD64Address) crb.asIntAddr(y)); break; case LCMP: masm.cmpq(asLongReg(x), (AMD64Address) crb.asLongAddr(y)); break; case ACMP: masm.cmpptr(asObjectReg(x), (AMD64Address) crb.asObjectAddr(y)); break; case FCMP: masm.ucomiss(asFloatReg(x), (AMD64Address) crb.asFloatAddr(y)); break; case DCMP: masm.ucomisd(asDoubleReg(x), (AMD64Address) crb.asDoubleAddr(y)); break; default: throw GraalInternalError.shouldNotReachHere(); } } else { throw GraalInternalError.shouldNotReachHere(); } } }