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view graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotCounterOp.java @ 22130:3f01bf8c02eb
mx: mxMxDir should be absolute (fixes Library.get_path()).
author | Danilo Ansaloni <danilo.ansaloni@oracle.com> |
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date | Tue, 30 Jun 2015 12:32:51 +0200 |
parents | 0e095e2c24e2 |
children | 3285aa5a60f8 |
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/* * Copyright (c) 2015, 2015, 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.hotspot.amd64; import jdk.internal.jvmci.code.*; import jdk.internal.jvmci.hotspot.*; import jdk.internal.jvmci.meta.*; import static jdk.internal.jvmci.amd64.AMD64.*; import static jdk.internal.jvmci.code.ValueUtil.*; import static jdk.internal.jvmci.common.JVMCIError.*; import com.oracle.graal.asm.amd64.*; import com.oracle.graal.hotspot.*; import com.oracle.graal.hotspot.meta.*; import com.oracle.graal.lir.*; import com.oracle.graal.lir.asm.*; @Opcode("BenchMarkCounter") public class AMD64HotSpotCounterOp extends HotSpotCounterOp { public static final LIRInstructionClass<AMD64HotSpotCounterOp> TYPE = LIRInstructionClass.create(AMD64HotSpotCounterOp.class); @Alive({OperandFlag.STACK, OperandFlag.UNINITIALIZED}) private StackSlotValue backupSlot; public AMD64HotSpotCounterOp(String name, String group, Value increment, HotSpotRegistersProvider registers, HotSpotVMConfig config, StackSlotValue backupSlot) { super(TYPE, name, group, increment, registers, config); this.backupSlot = backupSlot; } public AMD64HotSpotCounterOp(String[] names, String[] groups, Value[] increments, HotSpotRegistersProvider registers, HotSpotVMConfig config, StackSlotValue backupSlot) { super(TYPE, names, groups, increments, registers, config); this.backupSlot = backupSlot; } @Override public void emitCode(CompilationResultBuilder crb) { AMD64MacroAssembler masm = (AMD64MacroAssembler) crb.asm; TargetDescription target = crb.target; Register scratch; // It can happen that the rax register is the increment register, in this case we do not // want to spill it to the stack. if (!contains(increments, rax)) { scratch = rax; } else if (!contains(increments, rbx)) { scratch = rbx; } else { // In this case rax and rbx are used as increment. Either we implement a third register // or we implement a spillover the value from rax to rbx or vice versa during // emitIncrement(). throw unimplemented("RAX and RBX are increment registers a the same time, spilling over the scratch register is not supported right now"); } // address for counters array AMD64Address countersArrayAddr = new AMD64Address(thread, config.jvmciCountersThreadOffset); Register countersArrayReg = scratch; // backup scratch register masm.movq((AMD64Address) crb.asAddress(backupSlot), scratch); // load counters array masm.movptr(countersArrayReg, countersArrayAddr); CounterProcedure emitProcedure = (counterIndex, increment, displacement) -> emitIncrement(masm, countersArrayReg, increment, displacement); forEachCounter(emitProcedure, target); // restore scratch register masm.movq(scratch, (AMD64Address) crb.asAddress(backupSlot)); } /** * Tests if the array contains the register. */ private static boolean contains(Value[] increments, Register register) { for (Value increment : increments) { if (isRegister(increment) && asRegister(increment).equals(register)) { return true; } } return false; } private static void emitIncrement(AMD64MacroAssembler masm, Register countersArrayReg, Value incrementValue, int displacement) { // address for counter value AMD64Address counterAddr = new AMD64Address(countersArrayReg, displacement); // increment counter (in memory) if (isConstant(incrementValue)) { int increment = asInt(asConstant(incrementValue)); masm.incrementq(counterAddr, increment); } else { masm.addq(counterAddr, asRegister(incrementValue)); } } }