1 /* 2 * Copyright (c) 2012, 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 package org.graalvm.compiler.hotspot.amd64; 24 25 import static jdk.vm.ci.amd64.AMD64.rsp; 26 27 import org.graalvm.compiler.asm.amd64.AMD64Address; 28 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; 29 import org.graalvm.compiler.lir.LIRInstructionClass; 30 import org.graalvm.compiler.lir.Opcode; 31 import org.graalvm.compiler.lir.amd64.AMD64LIRInstruction; 32 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 33 34 import jdk.vm.ci.code.Register; 35 36 @Opcode 37 final class AMD64HotSpotCRuntimeCallPrologueOp extends AMD64LIRInstruction { 38 public static final LIRInstructionClass<AMD64HotSpotCRuntimeCallPrologueOp> TYPE = LIRInstructionClass.create(AMD64HotSpotCRuntimeCallPrologueOp.class); 39 40 private final int threadLastJavaSpOffset; 41 private final Register thread; 42 43 AMD64HotSpotCRuntimeCallPrologueOp(int threadLastJavaSpOffset, Register thread) { 44 super(TYPE); 45 this.threadLastJavaSpOffset = threadLastJavaSpOffset; 46 this.thread = thread; 47 } 48 49 @Override 50 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) { 51 // save last Java frame 52 masm.movq(new AMD64Address(thread, threadLastJavaSpOffset), rsp); 53 } 54 }