| /* |
| * Copyright (c) 2015, 2016, 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.sparc; |
| |
| import static org.graalvm.compiler.asm.sparc.SPARCAssembler.BPCC; |
| import static org.graalvm.compiler.asm.sparc.SPARCAssembler.CBCOND; |
| import static org.graalvm.compiler.asm.sparc.SPARCAssembler.INSTRUCTION_SIZE; |
| import static org.graalvm.compiler.asm.sparc.SPARCAssembler.Annul.ANNUL; |
| import static org.graalvm.compiler.asm.sparc.SPARCAssembler.BranchPredict.PREDICT_TAKEN; |
| import static org.graalvm.compiler.lir.sparc.SPARCMove.loadFromConstantTable; |
| import static jdk.vm.ci.code.ValueUtil.asRegister; |
| import static jdk.vm.ci.sparc.SPARC.g0; |
| |
| import org.graalvm.compiler.asm.Assembler.LabelHint; |
| import org.graalvm.compiler.asm.Label; |
| import org.graalvm.compiler.asm.sparc.SPARCAssembler.CC; |
| import org.graalvm.compiler.asm.sparc.SPARCAssembler.ConditionFlag; |
| import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler; |
| import org.graalvm.compiler.core.common.calc.Condition; |
| import org.graalvm.compiler.lir.LIRInstructionClass; |
| import org.graalvm.compiler.lir.LabelRef; |
| import org.graalvm.compiler.lir.SwitchStrategy; |
| import org.graalvm.compiler.lir.asm.CompilationResultBuilder; |
| import org.graalvm.compiler.lir.sparc.SPARCControlFlow; |
| import org.graalvm.compiler.lir.sparc.SPARCDelayedControlTransfer; |
| |
| import jdk.vm.ci.code.Register; |
| import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant; |
| import jdk.vm.ci.meta.AllocatableValue; |
| import jdk.vm.ci.meta.Constant; |
| import jdk.vm.ci.meta.Value; |
| import jdk.vm.ci.sparc.SPARC.CPUFeature; |
| |
| final class SPARCHotSpotStrategySwitchOp extends SPARCControlFlow.StrategySwitchOp { |
| public static final LIRInstructionClass<SPARCHotSpotStrategySwitchOp> TYPE = LIRInstructionClass.create(SPARCHotSpotStrategySwitchOp.class); |
| |
| SPARCHotSpotStrategySwitchOp(Value constantTableBase, SwitchStrategy strategy, LabelRef[] keyTargets, LabelRef defaultTarget, Value key, Value scratch) { |
| super(TYPE, constantTableBase, strategy, keyTargets, defaultTarget, key, scratch); |
| } |
| |
| public class HotSpotSwitchClosure extends SwitchClosure { |
| protected HotSpotSwitchClosure(Register keyRegister, Register constantBaseRegister, CompilationResultBuilder crb, SPARCMacroAssembler masm) { |
| super(keyRegister, constantBaseRegister, crb, masm); |
| } |
| |
| @Override |
| protected void conditionalJump(int index, Condition condition, Label target) { |
| if (keyConstants[index] instanceof HotSpotMetaspaceConstant) { |
| HotSpotMetaspaceConstant constant = (HotSpotMetaspaceConstant) keyConstants[index]; |
| CC conditionCode = constant.isCompressed() ? CC.Icc : CC.Xcc; |
| ConditionFlag conditionFlag = SPARCControlFlow.fromCondition(true, condition, false); |
| LabelHint hint = requestHint(masm, target); |
| |
| // Load constant takes one instruction |
| int cbCondPosition = masm.position() + INSTRUCTION_SIZE; |
| boolean canUseShortBranch = masm.hasFeature(CPUFeature.CBCOND) && SPARCControlFlow.isShortBranch(masm, cbCondPosition, hint, target); |
| |
| Register scratchRegister = asRegister(scratch); |
| final int byteCount = constant.isCompressed() ? 4 : 8; |
| loadFromConstantTable(crb, masm, byteCount, asRegister(constantTableBase), constant, scratchRegister, SPARCDelayedControlTransfer.DUMMY); |
| |
| if (canUseShortBranch) { |
| CBCOND.emit(masm, conditionFlag, conditionCode == CC.Xcc, keyRegister, scratchRegister, target); |
| } else { |
| masm.cmp(keyRegister, scratchRegister); |
| BPCC.emit(masm, conditionCode, conditionFlag, ANNUL, PREDICT_TAKEN, target); |
| masm.nop(); // delay slot |
| } |
| } else { |
| super.conditionalJump(index, condition, target); |
| } |
| } |
| } |
| |
| @Override |
| protected int estimateEmbeddedSize(Constant c) { |
| if (c instanceof HotSpotMetaspaceConstant) { |
| return ((HotSpotMetaspaceConstant) c).isCompressed() ? 4 : 8; |
| } else { |
| return super.estimateEmbeddedSize(c); |
| } |
| } |
| |
| @Override |
| public void emitCode(final CompilationResultBuilder crb, final SPARCMacroAssembler masm) { |
| final Register keyRegister = asRegister(key); |
| final Register constantBaseRegister = AllocatableValue.ILLEGAL.equals(constantTableBase) ? g0 : asRegister(constantTableBase); |
| strategy.run(new HotSpotSwitchClosure(keyRegister, constantBaseRegister, crb, masm)); |
| } |
| } |