| /* |
| * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2018, Red Hat Inc. 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.lir.aarch64; |
| |
| import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.STACK; |
| import static jdk.vm.ci.code.ValueUtil.asStackSlot; |
| import static jdk.vm.ci.code.ValueUtil.isStackSlot; |
| |
| import java.util.Arrays; |
| |
| import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler; |
| import org.graalvm.compiler.lir.LIRInstructionClass; |
| import org.graalvm.compiler.lir.LIRValueUtil; |
| import org.graalvm.compiler.lir.Opcode; |
| import org.graalvm.compiler.lir.asm.CompilationResultBuilder; |
| |
| import jdk.vm.ci.code.Register; |
| import jdk.vm.ci.code.StackSlot; |
| import jdk.vm.ci.meta.AllocatableValue; |
| |
| /** |
| * Restores registers from stack slots. |
| */ |
| @Opcode("RESTORE_REGISTER") |
| public class AArch64RestoreRegistersOp extends AArch64LIRInstruction { |
| public static final LIRInstructionClass<AArch64RestoreRegistersOp> TYPE = LIRInstructionClass.create(AArch64RestoreRegistersOp.class); |
| |
| /** |
| * The slots from which the registers are restored. |
| */ |
| @Use(STACK) protected final AllocatableValue[] slots; |
| |
| /** |
| * The operation that saved the registers restored by this operation. |
| */ |
| private final AArch64SaveRegistersOp save; |
| |
| public AArch64RestoreRegistersOp(AllocatableValue[] values, AArch64SaveRegistersOp save) { |
| this(TYPE, values, save); |
| } |
| |
| protected AArch64RestoreRegistersOp(LIRInstructionClass<? extends AArch64RestoreRegistersOp> c, AllocatableValue[] values, AArch64SaveRegistersOp save) { |
| super(c); |
| assert Arrays.asList(values).stream().allMatch(LIRValueUtil::isVirtualStackSlot); |
| this.slots = values; |
| this.save = save; |
| } |
| |
| protected Register[] getSavedRegisters() { |
| return save.savedRegisters; |
| } |
| |
| protected void restoreRegister(CompilationResultBuilder crb, AArch64MacroAssembler masm, Register result, StackSlot input) { |
| AArch64Move.stack2reg(crb, masm, result.asValue(), input); |
| } |
| |
| @Override |
| public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) { |
| Register[] savedRegisters = getSavedRegisters(); |
| for (int i = 0; i < savedRegisters.length; i++) { |
| if (savedRegisters[i] != null) { |
| assert isStackSlot(slots[i]) : "not a StackSlot: " + slots[i]; |
| restoreRegister(crb, masm, savedRegisters[i], asStackSlot(slots[i])); |
| } |
| } |
| } |
| } |