| /* |
| * 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 org.graalvm.compiler.hotspot.amd64; |
| |
| import static org.graalvm.compiler.lir.LIRValueUtil.asJavaConstant; |
| import static org.graalvm.compiler.lir.LIRValueUtil.isJavaConstant; |
| import static jdk.vm.ci.amd64.AMD64.rax; |
| import static jdk.vm.ci.amd64.AMD64.rbx; |
| import static jdk.vm.ci.code.ValueUtil.asRegister; |
| import static jdk.vm.ci.code.ValueUtil.isRegister; |
| |
| import org.graalvm.compiler.asm.amd64.AMD64Address; |
| import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; |
| import org.graalvm.compiler.debug.GraalError; |
| import org.graalvm.compiler.hotspot.HotSpotCounterOp; |
| import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig; |
| import org.graalvm.compiler.hotspot.meta.HotSpotRegistersProvider; |
| import org.graalvm.compiler.lir.LIRInstructionClass; |
| import org.graalvm.compiler.lir.Opcode; |
| import org.graalvm.compiler.lir.asm.CompilationResultBuilder; |
| |
| import jdk.vm.ci.code.Register; |
| import jdk.vm.ci.code.TargetDescription; |
| import jdk.vm.ci.meta.AllocatableValue; |
| import jdk.vm.ci.meta.Value; |
| |
| @Opcode("BenchMarkCounter") |
| public class AMD64HotSpotCounterOp extends HotSpotCounterOp { |
| public static final LIRInstructionClass<AMD64HotSpotCounterOp> TYPE = LIRInstructionClass.create(AMD64HotSpotCounterOp.class); |
| |
| @Alive({OperandFlag.STACK, OperandFlag.UNINITIALIZED}) private AllocatableValue backupSlot; |
| |
| public AMD64HotSpotCounterOp(String name, String group, Value increment, HotSpotRegistersProvider registers, GraalHotSpotVMConfig config, AllocatableValue backupSlot) { |
| super(TYPE, name, group, increment, registers, config); |
| this.backupSlot = backupSlot; |
| } |
| |
| public AMD64HotSpotCounterOp(String[] names, String[] groups, Value[] increments, HotSpotRegistersProvider registers, GraalHotSpotVMConfig config, AllocatableValue 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 GraalError.unimplemented("RAX and RBX are increment registers at 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 (isJavaConstant(incrementValue)) { |
| int increment = asInt(asJavaConstant(incrementValue)); |
| masm.incrementq(counterAddr, increment); |
| } else { |
| masm.addq(counterAddr, asRegister(incrementValue)); |
| } |
| |
| } |
| } |