Mercurial > hg > truffle
view graal/com.oracle.graal.lir.amd64/src/com/oracle/graal/lir/amd64/AMD64ZapRegistersOp.java @ 17115:9a0bf0c3b21e
[SPARC] Use VIS3 moves between fp and gp registers when available
author | Stefan Anzinger <stefan.anzinger@oracle.com> |
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date | Tue, 16 Sep 2014 11:49:23 -0700 |
parents | c0b8d395368b |
children | 9619ba4daf4c |
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/* * Copyright (c) 2013, 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.lir.LIRInstruction.OperandFlag.*; import static com.oracle.graal.lir.amd64.AMD64SaveRegistersOp.*; import java.util.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.asm.amd64.*; import com.oracle.graal.lir.*; import com.oracle.graal.lir.StandardOp.SaveRegistersOp; import com.oracle.graal.lir.asm.*; /** * Writes well known garbage values to registers. */ @Opcode("ZAP_REGISTER") public final class AMD64ZapRegistersOp extends AMD64LIRInstruction implements SaveRegistersOp { /** * The registers that are zapped. */ protected final Register[] zappedRegisters; /** * The garbage values that are written to the registers. */ @Use({CONST}) protected Constant[] zapValues; public AMD64ZapRegistersOp(Register[] zappedRegisters, Constant[] zapValues) { this.zappedRegisters = zappedRegisters; this.zapValues = zapValues; } @Override public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) { for (int i = 0; i < zappedRegisters.length; i++) { if (zappedRegisters[i] != null) { RegisterValue registerValue = zappedRegisters[i].asValue(zapValues[i].getLIRKind()); AMD64Move.move(crb, masm, registerValue, zapValues[i]); } } } public boolean supportsRemove() { return true; } public int remove(Set<Register> doNotSave) { return prune(doNotSave, zappedRegisters); } public RegisterSaveLayout getMap(FrameMap frameMap) { return new RegisterSaveLayout(new Register[0], new int[0]); } }