1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 package org.graalvm.compiler.hotspot.aarch64;
  26 
  27 import static jdk.vm.ci.code.ValueUtil.asRegister;
  28 
  29 import jdk.vm.ci.aarch64.AArch64Kind;
  30 import jdk.vm.ci.code.Register;
  31 import jdk.vm.ci.meta.AllocatableValue;
  32 import jdk.vm.ci.meta.Constant;
  33 
  34 import org.graalvm.compiler.asm.aarch64.AArch64Address;
  35 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
  36 import org.graalvm.compiler.debug.GraalError;
  37 import org.graalvm.compiler.lir.LIRInstructionClass;
  38 import org.graalvm.compiler.lir.aarch64.AArch64LIRInstruction;
  39 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
  40 
  41 public final class AArch64HotSpotLoadAddressOp extends AArch64LIRInstruction {
  42 
  43     public static final LIRInstructionClass<AArch64HotSpotLoadAddressOp> TYPE = LIRInstructionClass.create(AArch64HotSpotLoadAddressOp.class);
  44 
  45     @Def({OperandFlag.REG}) protected AllocatableValue result;
  46     private final Constant constant;
  47     private final Object note;
  48 
  49     public AArch64HotSpotLoadAddressOp(AllocatableValue result, Constant constant, Object note) {
  50         super(TYPE);
  51         this.result = result;
  52         this.constant = constant;
  53         this.note = note;
  54     }
  55 
  56     @Override
  57     public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
  58         crb.recordInlineDataInCodeWithNote(constant, note);
  59         AArch64Kind kind = (AArch64Kind) result.getPlatformKind();
  60         int size = 0;
  61         switch (kind) {
  62             case DWORD:
  63                 size = 32;
  64                 break;
  65             case QWORD:
  66                 size = 64;
  67                 break;
  68             default:
  69                 throw GraalError.shouldNotReachHere("unexpected kind: " + kind);
  70         }
  71         if (crb.compilationResult.isImmutablePIC()) {
  72             Register dst = asRegister(result);
  73             masm.addressOf(dst);
  74             masm.ldr(size, dst, AArch64Address.createBaseRegisterOnlyAddress(dst));
  75         } else {
  76             masm.ldr(size, asRegister(result), masm.getPlaceholder(-1));
  77         }
  78     }
  79 }