1 /*
   2  * Copyright (c) 2015, 2018, 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.sparc;
  26 
  27 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
  28 import static jdk.vm.ci.code.ValueUtil.asRegister;
  29 
  30 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler;
  31 import org.graalvm.compiler.lir.LIRInstructionClass;
  32 import org.graalvm.compiler.lir.Opcode;
  33 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
  34 import org.graalvm.compiler.lir.sparc.SPARCLIRInstruction;
  35 
  36 import jdk.vm.ci.code.Register;
  37 import jdk.vm.ci.meta.AllocatableValue;
  38 import jdk.vm.ci.sparc.SPARCKind;
  39 
  40 /**
  41  * Jumps to the exception handler specified by {@link #address} and leaves the current window. It
  42  * does not modify the i7 register, as the exception handler stub expects the throwing pc in it.
  43  * <p>
  44  * See also:
  45  * <li>Runtime1::generate_handle_exception c1_Runtime1_sparc.cpp
  46  * <li>SharedRuntime::generate_deopt_blob at exception_in_tls_offset (sharedRuntime_sparc.cpp)
  47  */
  48 @Opcode("JUMP_TO_EXCEPTION_HANDLER")
  49 final class SPARCHotSpotJumpToExceptionHandlerOp extends SPARCLIRInstruction {
  50     public static final LIRInstructionClass<SPARCHotSpotJumpToExceptionHandlerOp> TYPE = LIRInstructionClass.create(SPARCHotSpotJumpToExceptionHandlerOp.class);
  51     public static final SizeEstimate SIZE = SizeEstimate.create(2);
  52 
  53     @Use(REG) AllocatableValue address;
  54 
  55     SPARCHotSpotJumpToExceptionHandlerOp(AllocatableValue address) {
  56         super(TYPE, SIZE);
  57         this.address = address;
  58     }
  59 
  60     @Override
  61     public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
  62         Register addrRegister = asRegister(address, SPARCKind.XWORD);
  63         masm.jmp(addrRegister);
  64         masm.restoreWindow();
  65     }
  66 }