Mercurial > hg > truffle
view graal/com.oracle.graal.lir.amd64/src/com/oracle/graal/lir/amd64/AMD64Compare.java @ 6329:92bc58dc5b5e
More clean up and documentation in api.code and api.meta.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 07 Sep 2012 13:40:53 +0200 |
parents | 141b15521a39 |
children | 85c1b84f8fd9 |
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/* * Copyright (c) 2011, 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.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.graph.*; import com.oracle.graal.lir.asm.*; import com.oracle.max.asm.target.amd64.*; public enum AMD64Compare { 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(TargetMethodAssembler tasm, AMD64MacroAssembler masm) { emit(tasm, masm, opcode, x, y); } @Override protected void verify() { super.verify(); assert (name().startsWith("I") && x.getKind() == Kind.Int && y.getKind().stackKind() == Kind.Int) || (name().startsWith("I") && x.getKind() == Kind.Jsr && y.getKind() == Kind.Jsr) || (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); } } public static void emit(TargetMethodAssembler tasm, AMD64MacroAssembler masm, AMD64Compare opcode, Value x, Value y) { if (isRegister(y)) { switch (opcode) { 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 (isConstant(y)) { switch (opcode) { case ICMP: masm.cmpl(asIntReg(x), tasm.asIntConst(y)); break; case LCMP: masm.cmpq(asLongReg(x), tasm.asIntConst(y)); break; case ACMP: if (((Constant) y).isNull()) { masm.cmpq(asObjectReg(x), 0); break; } else { throw GraalInternalError.shouldNotReachHere("Only null object constants are allowed in comparisons"); } case FCMP: masm.ucomiss(asFloatReg(x), tasm.asFloatConstRef(y)); break; case DCMP: masm.ucomisd(asDoubleReg(x), tasm.asDoubleConstRef(y)); break; default: throw GraalInternalError.shouldNotReachHere(); } } else { switch (opcode) { case ICMP: masm.cmpl(asIntReg(x), tasm.asIntAddr(y)); break; case LCMP: masm.cmpq(asLongReg(x), tasm.asLongAddr(y)); break; case ACMP: masm.cmpptr(asObjectReg(x), tasm.asObjectAddr(y)); break; case FCMP: masm.ucomiss(asFloatReg(x), tasm.asFloatAddr(y)); break; case DCMP: masm.ucomisd(asDoubleReg(x), tasm.asDoubleAddr(y)); break; default: throw GraalInternalError.shouldNotReachHere(); } } } }