| /* |
| * Copyright (c) 2014, 2015, 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 jdk.vm.ci.sparc.SPARC.g0; |
| import static jdk.vm.ci.sparc.SPARC.i0; |
| import static jdk.vm.ci.sparc.SPARC.l7; |
| |
| import org.graalvm.compiler.asm.sparc.SPARCAddress; |
| import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler; |
| import org.graalvm.compiler.hotspot.HotSpotBackend; |
| import org.graalvm.compiler.lir.LIRInstructionClass; |
| import org.graalvm.compiler.lir.Opcode; |
| import org.graalvm.compiler.lir.asm.CompilationResultBuilder; |
| import org.graalvm.compiler.lir.sparc.SPARCLIRInstruction; |
| import org.graalvm.compiler.lir.sparc.SPARCSaveRegistersOp; |
| |
| import jdk.vm.ci.code.Register; |
| |
| /** |
| * Emits code that leaves a stack frame which is tailored to call the C++ method |
| * {@link HotSpotBackend#UNPACK_FRAMES Deoptimization::unpack_frames}. |
| */ |
| @Opcode("LEAVE_UNPACK_FRAMES_STACK_FRAME") |
| final class SPARCHotSpotLeaveUnpackFramesStackFrameOp extends SPARCLIRInstruction { |
| public static final LIRInstructionClass<SPARCHotSpotLeaveUnpackFramesStackFrameOp> TYPE = LIRInstructionClass.create(SPARCHotSpotLeaveUnpackFramesStackFrameOp.class); |
| |
| private final Register thread; |
| private final int threadLastJavaSpOffset; |
| private final int threadLastJavaPcOffset; |
| private final int threadJavaFrameAnchorFlagsOffset; |
| |
| SPARCHotSpotLeaveUnpackFramesStackFrameOp(Register thread, int threadLastJavaSpOffset, int threadLastJavaPcOffset, int threadJavaFrameAnchorFlagsOffset) { |
| super(TYPE); |
| this.thread = thread; |
| this.threadLastJavaSpOffset = threadLastJavaSpOffset; |
| this.threadLastJavaPcOffset = threadLastJavaPcOffset; |
| this.threadJavaFrameAnchorFlagsOffset = threadJavaFrameAnchorFlagsOffset; |
| } |
| |
| @Override |
| public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { |
| /* |
| * Safe thread register manually since we are not using LEAF_SP for {@link |
| * DeoptimizationStub#UNPACK_FRAMES}. |
| */ |
| masm.mov(l7, thread); |
| |
| SPARCAddress lastJavaPc = new SPARCAddress(thread, threadLastJavaPcOffset); |
| |
| // We borrow the threads lastJavaPC to transfer the value from float to i0 |
| masm.stdf(SPARCSaveRegistersOp.RETURN_REGISTER_STORAGE, lastJavaPc); |
| masm.ldx(lastJavaPc, i0); |
| |
| // Clear last Java frame values. |
| masm.stx(g0, lastJavaPc); |
| masm.stx(g0, new SPARCAddress(thread, threadLastJavaSpOffset)); |
| masm.stw(g0, new SPARCAddress(thread, threadJavaFrameAnchorFlagsOffset)); |
| } |
| } |