1 /*
   2  * Copyright (c) 2014, 2019, 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.lir.sparc;
  26 
  27 import static jdk.vm.ci.code.ValueUtil.asStackSlot;
  28 import static jdk.vm.ci.code.ValueUtil.isStackSlot;
  29 import static org.graalvm.compiler.lir.sparc.SPARCDelayedControlTransfer.DUMMY;
  30 
  31 import jdk.internal.vm.compiler.collections.EconomicSet;
  32 import org.graalvm.compiler.asm.sparc.SPARCAddress;
  33 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler;
  34 import org.graalvm.compiler.lir.LIRInstructionClass;
  35 import org.graalvm.compiler.lir.Opcode;
  36 import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp;
  37 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
  38 
  39 import jdk.vm.ci.code.Register;
  40 import jdk.vm.ci.code.RegisterValue;
  41 import jdk.vm.ci.code.StackSlot;
  42 import jdk.vm.ci.meta.AllocatableValue;
  43 import jdk.vm.ci.sparc.SPARC;
  44 
  45 /**
  46  * Saves registers to stack slots.
  47  */
  48 @Opcode("SAVE_REGISTER")
  49 public class SPARCSaveRegistersOp extends SaveRegistersOp implements SPARCLIRInstructionMixin {
  50     public static final LIRInstructionClass<SPARCSaveRegistersOp> TYPE = LIRInstructionClass.create(SPARCSaveRegistersOp.class);
  51     public static final Register RETURN_REGISTER_STORAGE = SPARC.d62;
  52     public static final SizeEstimate SIZE = SizeEstimate.create(32);
  53     private final SPARCLIRInstructionMixinStore store;
  54 
  55     /**
  56      *
  57      * @param savedRegisters the registers saved by this operation which may be subject to
  58      *            {@linkplain #remove(EconomicSet) pruning}
  59      * @param savedRegisterLocations the slots to which the registers are saved
  60      */
  61     public SPARCSaveRegistersOp(Register[] savedRegisters, AllocatableValue[] savedRegisterLocations) {
  62         super(TYPE, savedRegisters, savedRegisterLocations);
  63         this.store = new SPARCLIRInstructionMixinStore(SIZE);
  64     }
  65 
  66     @Override
  67     public void emitCode(CompilationResultBuilder crb) {
  68         SPARCMacroAssembler masm = (SPARCMacroAssembler) crb.asm;
  69         // Can be used with VIS3
  70         // new Movxtod(SPARC.i0, RETURN_REGISTER_STORAGE).emit(masm);
  71         // We abuse the first stackslot for transferring i0 to return_register_storage
  72         // assert slots.length >= 1;
  73         SPARCAddress slot0Address = (SPARCAddress) crb.asAddress(slots[0]);
  74         masm.stx(SPARC.i0, slot0Address);
  75         masm.lddf(slot0Address, RETURN_REGISTER_STORAGE);
  76 
  77         // Now save the registers
  78         for (int i = 0; i < savedRegisters.length; i++) {
  79             if (savedRegisters[i] != null) {
  80                 assert isStackSlot(slots[i]) : "not a StackSlot: " + slots[i];
  81                 Register savedRegister = savedRegisters[i];
  82                 StackSlot slot = asStackSlot(slots[i]);
  83                 SPARCAddress slotAddress = (SPARCAddress) crb.asAddress(slot);
  84                 RegisterValue input = savedRegister.asValue(slot.getValueKind());
  85                 SPARCMove.emitStore(input, slotAddress, slot.getPlatformKind(), DUMMY, null, crb, masm);
  86             }
  87         }
  88     }
  89 
  90     @Override
  91     public SPARCLIRInstructionMixinStore getSPARCLIRInstructionStore() {
  92         return store;
  93     }
  94 }