hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir.aarch64/src/org/graalvm/compiler/lir/aarch64/AArch64Call.java - platform/libcore - Git at Google

 /*
  * Copyright (c) 2013, 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.lir.aarch64;

 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.ILLEGAL;
 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.STACK;
 import static jdk.vm.ci.aarch64.AArch64.r8;
 import static jdk.vm.ci.code.ValueUtil.asRegister;
 import static jdk.vm.ci.code.ValueUtil.isRegister;

 import org.graalvm.compiler.asm.Label;
 import org.graalvm.compiler.asm.aarch64.AArch64Assembler;
 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
 import org.graalvm.compiler.core.common.spi.ForeignCallLinkage;
 import org.graalvm.compiler.lir.LIRFrameState;
 import org.graalvm.compiler.lir.LIRInstructionClass;
 import org.graalvm.compiler.lir.Opcode;
 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;

 import jdk.vm.ci.code.Register;
 import jdk.vm.ci.meta.InvokeTarget;
 import jdk.vm.ci.meta.ResolvedJavaMethod;
 import jdk.vm.ci.meta.Value;

 public class AArch64Call {

     public abstract static class CallOp extends AArch64LIRInstruction {
         @Def({REG, ILLEGAL}) protected Value result;
         @Use({REG, STACK}) protected Value[] parameters;
         @Temp({REG, STACK}) protected Value[] temps;
         @State protected LIRFrameState state;

         protected CallOp(LIRInstructionClass<? extends CallOp> c, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
             super(c);
             this.result = result;
             this.parameters = parameters;
             this.state = state;
             this.temps = addStackSlotsToTemporaries(parameters, temps);
             assert temps != null;
         }

         @Override
         public boolean destroysCallerSavedRegisters() {
             return true;
         }
     }

     public abstract static class MethodCallOp extends CallOp {
         protected final ResolvedJavaMethod callTarget;

         protected MethodCallOp(LIRInstructionClass<? extends MethodCallOp> c, ResolvedJavaMethod callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
             super(c, result, parameters, temps, state);
             this.callTarget = callTarget;
         }
     }

     @Opcode("CALL_INDIRECT")
     public static class IndirectCallOp extends MethodCallOp {
         public static final LIRInstructionClass<IndirectCallOp> TYPE = LIRInstructionClass.create(IndirectCallOp.class);

         @Use({REG}) protected Value targetAddress;

         public IndirectCallOp(ResolvedJavaMethod callTarget, Value result, Value[] parameters, Value[] temps, Value targetAddress, LIRFrameState state) {
             this(TYPE, callTarget, result, parameters, temps, targetAddress, state);
         }

         protected IndirectCallOp(LIRInstructionClass<? extends IndirectCallOp> c, ResolvedJavaMethod callTarget, Value result, Value[] parameters, Value[] temps, Value targetAddress,
                         LIRFrameState state) {
             super(c, callTarget, result, parameters, temps, state);
             this.targetAddress = targetAddress;
         }

         @Override
         public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
             Register target = asRegister(targetAddress);
             indirectCall(crb, masm, target, callTarget, state);
         }

         @Override
         public void verify() {
             super.verify();
             assert isRegister(targetAddress) : "The current register allocator cannot handle variables to be used at call sites, " + "it must be in a fixed register for now";
         }
     }

     @Opcode("CALL_DIRECT")
     public abstract static class DirectCallOp extends MethodCallOp {
         public static final LIRInstructionClass<DirectCallOp> TYPE = LIRInstructionClass.create(DirectCallOp.class);

         public DirectCallOp(ResolvedJavaMethod target, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
             super(TYPE, target, result, parameters, temps, state);
         }

         protected DirectCallOp(LIRInstructionClass<? extends DirectCallOp> c, ResolvedJavaMethod callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
             super(c, callTarget, result, parameters, temps, state);
         }

         @Override
         public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
             directCall(crb, masm, callTarget, null, state);
         }
     }

     public abstract static class ForeignCallOp extends CallOp {
         protected final ForeignCallLinkage callTarget;
         protected final Label label;

         protected ForeignCallOp(LIRInstructionClass<? extends ForeignCallOp> c, ForeignCallLinkage callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state, Label label) {
             super(c, result, parameters, temps, state);
             this.callTarget = callTarget;
             this.label = label;
         }

         @Override
         public boolean destroysCallerSavedRegisters() {
             return callTarget.destroysRegisters();
         }

         @Override
         public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
             emitCall(crb, masm);
         }

         protected abstract void emitCall(CompilationResultBuilder crb, AArch64MacroAssembler masm);
     }

     @Opcode("NEAR_FOREIGN_CALL")
     public static class DirectNearForeignCallOp extends ForeignCallOp {
         public static final LIRInstructionClass<DirectNearForeignCallOp> TYPE = LIRInstructionClass.create(DirectNearForeignCallOp.class);

         public DirectNearForeignCallOp(ForeignCallLinkage callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state, Label label) {
             super(TYPE, callTarget, result, parameters, temps, state, label);
         }

         @Override
         protected void emitCall(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
             directCall(crb, masm, callTarget, null, state, label);
         }
     }

     @Opcode("FAR_FOREIGN_CALL")
     public static class DirectFarForeignCallOp extends ForeignCallOp {
         public static final LIRInstructionClass<DirectFarForeignCallOp> TYPE = LIRInstructionClass.create(DirectFarForeignCallOp.class);

         public DirectFarForeignCallOp(ForeignCallLinkage callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state, Label label) {
             super(TYPE, callTarget, result, parameters, temps, state, label);
         }

         @Override
         protected void emitCall(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
             // We can use any scratch register we want, since we know that they have been saved
             // before calling.
             directCall(crb, masm, callTarget, r8, state, label);
         }
     }

     /**
      * Tests whether linkage can be called directly under all circumstances without the need for a
      * scratch register.
      *
      * Note this is a pessimistic assumption: This may return false despite a near call/jump being
      * adequate.
      *
      * @param linkage Foreign call description
      * @return true if foreign call can be called directly and does not need a scratch register to
      *         load the address into.
      */
     public static boolean isNearCall(ForeignCallLinkage linkage) {
         long maxOffset = linkage.getMaxCallTargetOffset();
         return maxOffset != -1 && AArch64MacroAssembler.isBranchImmediateOffset(maxOffset);
     }

     public static void directCall(CompilationResultBuilder crb, AArch64MacroAssembler masm, InvokeTarget callTarget, Register scratch, LIRFrameState info) {
         directCall(crb, masm, callTarget, scratch, info, null);
     }

     public static void directCall(CompilationResultBuilder crb, AArch64MacroAssembler masm, InvokeTarget callTarget, Register scratch, LIRFrameState info, Label label) {
         int before = masm.position();
         if (scratch != null) {
             /*
              * Offset might not fit into a 28-bit immediate, generate an indirect call with a 64-bit
              * immediate address which is fixed up by HotSpot.
              */
             masm.movNativeAddress(scratch, 0L);
             masm.blr(scratch);
         } else {
             // Address is fixed up by HotSpot.
             masm.bl(0);
         }
         if (label != null) {
             // We need this label to be the return address.
             masm.bind(label);
         }
         int after = masm.position();
         crb.recordDirectCall(before, after, callTarget, info);
         crb.recordExceptionHandlers(after, info);
         masm.ensureUniquePC();
     }

     public static void indirectCall(CompilationResultBuilder crb, AArch64MacroAssembler masm, Register dst, InvokeTarget callTarget, LIRFrameState info) {
         int before = masm.position();
         masm.blr(dst);
         int after = masm.position();
         crb.recordIndirectCall(before, after, callTarget, info);
         crb.recordExceptionHandlers(after, info);
         masm.ensureUniquePC();
     }

     public static void directJmp(CompilationResultBuilder crb, AArch64MacroAssembler masm, InvokeTarget target) {
         int before = masm.position();
         // Address is fixed up later by c++ code.
         masm.jmp();
         int after = masm.position();
         crb.recordDirectCall(before, after, target, null);
         masm.ensureUniquePC();
     }

     public static void indirectJmp(CompilationResultBuilder crb, AArch64MacroAssembler masm, Register dst, InvokeTarget target) {
         int before = masm.position();
         masm.jmp(dst);
         int after = masm.position();
         crb.recordIndirectCall(before, after, target, null);
         masm.ensureUniquePC();
     }

     public static void directConditionalJmp(CompilationResultBuilder crb, AArch64MacroAssembler masm, InvokeTarget target, AArch64Assembler.ConditionFlag cond) {
         int before = masm.position();
         masm.branchConditionally(cond);
         int after = masm.position();
         crb.recordDirectCall(before, after, target, null);
         masm.ensureUniquePC();
     }

 }
	/*
	* Copyright (c) 2013, 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.lir.aarch64;

	import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.ILLEGAL;
	import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
	import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.STACK;
	import static jdk.vm.ci.aarch64.AArch64.r8;
	import static jdk.vm.ci.code.ValueUtil.asRegister;
	import static jdk.vm.ci.code.ValueUtil.isRegister;

	import org.graalvm.compiler.asm.Label;
	import org.graalvm.compiler.asm.aarch64.AArch64Assembler;
	import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
	import org.graalvm.compiler.core.common.spi.ForeignCallLinkage;
	import org.graalvm.compiler.lir.LIRFrameState;
	import org.graalvm.compiler.lir.LIRInstructionClass;
	import org.graalvm.compiler.lir.Opcode;
	import org.graalvm.compiler.lir.asm.CompilationResultBuilder;

	import jdk.vm.ci.code.Register;
	import jdk.vm.ci.meta.InvokeTarget;
	import jdk.vm.ci.meta.ResolvedJavaMethod;
	import jdk.vm.ci.meta.Value;

	public class AArch64Call {

	public abstract static class CallOp extends AArch64LIRInstruction {
	@Def({REG, ILLEGAL}) protected Value result;
	@Use({REG, STACK}) protected Value[] parameters;
	@Temp({REG, STACK}) protected Value[] temps;
	@State protected LIRFrameState state;

	protected CallOp(LIRInstructionClass<? extends CallOp> c, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
	super(c);
	this.result = result;
	this.parameters = parameters;
	this.state = state;
	this.temps = addStackSlotsToTemporaries(parameters, temps);
	assert temps != null;
	}

	@Override
	public boolean destroysCallerSavedRegisters() {
	return true;
	}
	}

	public abstract static class MethodCallOp extends CallOp {
	protected final ResolvedJavaMethod callTarget;

	protected MethodCallOp(LIRInstructionClass<? extends MethodCallOp> c, ResolvedJavaMethod callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
	super(c, result, parameters, temps, state);
	this.callTarget = callTarget;
	}
	}

	@Opcode("CALL_INDIRECT")
	public static class IndirectCallOp extends MethodCallOp {
	public static final LIRInstructionClass<IndirectCallOp> TYPE = LIRInstructionClass.create(IndirectCallOp.class);

	@Use({REG}) protected Value targetAddress;

	public IndirectCallOp(ResolvedJavaMethod callTarget, Value result, Value[] parameters, Value[] temps, Value targetAddress, LIRFrameState state) {
	this(TYPE, callTarget, result, parameters, temps, targetAddress, state);
	}

	protected IndirectCallOp(LIRInstructionClass<? extends IndirectCallOp> c, ResolvedJavaMethod callTarget, Value result, Value[] parameters, Value[] temps, Value targetAddress,
	LIRFrameState state) {
	super(c, callTarget, result, parameters, temps, state);
	this.targetAddress = targetAddress;
	}

	@Override
	public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
	Register target = asRegister(targetAddress);
	indirectCall(crb, masm, target, callTarget, state);
	}

	@Override
	public void verify() {
	super.verify();
	assert isRegister(targetAddress) : "The current register allocator cannot handle variables to be used at call sites, " + "it must be in a fixed register for now";
	}
	}

	@Opcode("CALL_DIRECT")
	public abstract static class DirectCallOp extends MethodCallOp {
	public static final LIRInstructionClass<DirectCallOp> TYPE = LIRInstructionClass.create(DirectCallOp.class);

	public DirectCallOp(ResolvedJavaMethod target, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
	super(TYPE, target, result, parameters, temps, state);
	}

	protected DirectCallOp(LIRInstructionClass<? extends DirectCallOp> c, ResolvedJavaMethod callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
	super(c, callTarget, result, parameters, temps, state);
	}

	@Override
	public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
	directCall(crb, masm, callTarget, null, state);
	}
	}

	public abstract static class ForeignCallOp extends CallOp {
	protected final ForeignCallLinkage callTarget;
	protected final Label label;

	protected ForeignCallOp(LIRInstructionClass<? extends ForeignCallOp> c, ForeignCallLinkage callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state, Label label) {
	super(c, result, parameters, temps, state);
	this.callTarget = callTarget;
	this.label = label;
	}

	@Override
	public boolean destroysCallerSavedRegisters() {
	return callTarget.destroysRegisters();
	}

	@Override
	public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
	emitCall(crb, masm);
	}

	protected abstract void emitCall(CompilationResultBuilder crb, AArch64MacroAssembler masm);
	}

	@Opcode("NEAR_FOREIGN_CALL")
	public static class DirectNearForeignCallOp extends ForeignCallOp {
	public static final LIRInstructionClass<DirectNearForeignCallOp> TYPE = LIRInstructionClass.create(DirectNearForeignCallOp.class);

	public DirectNearForeignCallOp(ForeignCallLinkage callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state, Label label) {
	super(TYPE, callTarget, result, parameters, temps, state, label);
	}

	@Override
	protected void emitCall(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
	directCall(crb, masm, callTarget, null, state, label);
	}
	}

	@Opcode("FAR_FOREIGN_CALL")
	public static class DirectFarForeignCallOp extends ForeignCallOp {
	public static final LIRInstructionClass<DirectFarForeignCallOp> TYPE = LIRInstructionClass.create(DirectFarForeignCallOp.class);

	public DirectFarForeignCallOp(ForeignCallLinkage callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state, Label label) {
	super(TYPE, callTarget, result, parameters, temps, state, label);
	}

	@Override
	protected void emitCall(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
	// We can use any scratch register we want, since we know that they have been saved
	// before calling.
	directCall(crb, masm, callTarget, r8, state, label);
	}
	}

	/**
	* Tests whether linkage can be called directly under all circumstances without the need for a
	* scratch register.
	*
	* Note this is a pessimistic assumption: This may return false despite a near call/jump being
	* adequate.
	*
	* @param linkage Foreign call description
	* @return true if foreign call can be called directly and does not need a scratch register to
	* load the address into.
	*/
	public static boolean isNearCall(ForeignCallLinkage linkage) {
	long maxOffset = linkage.getMaxCallTargetOffset();
	return maxOffset != -1 && AArch64MacroAssembler.isBranchImmediateOffset(maxOffset);
	}

	public static void directCall(CompilationResultBuilder crb, AArch64MacroAssembler masm, InvokeTarget callTarget, Register scratch, LIRFrameState info) {
	directCall(crb, masm, callTarget, scratch, info, null);
	}

	public static void directCall(CompilationResultBuilder crb, AArch64MacroAssembler masm, InvokeTarget callTarget, Register scratch, LIRFrameState info, Label label) {
	int before = masm.position();
	if (scratch != null) {
	/*
	* Offset might not fit into a 28-bit immediate, generate an indirect call with a 64-bit
	* immediate address which is fixed up by HotSpot.
	*/
	masm.movNativeAddress(scratch, 0L);
	masm.blr(scratch);
	} else {
	// Address is fixed up by HotSpot.
	masm.bl(0);
	}
	if (label != null) {
	// We need this label to be the return address.
	masm.bind(label);
	}
	int after = masm.position();
	crb.recordDirectCall(before, after, callTarget, info);
	crb.recordExceptionHandlers(after, info);
	masm.ensureUniquePC();
	}

	public static void indirectCall(CompilationResultBuilder crb, AArch64MacroAssembler masm, Register dst, InvokeTarget callTarget, LIRFrameState info) {
	int before = masm.position();
	masm.blr(dst);
	int after = masm.position();
	crb.recordIndirectCall(before, after, callTarget, info);
	crb.recordExceptionHandlers(after, info);
	masm.ensureUniquePC();
	}

	public static void directJmp(CompilationResultBuilder crb, AArch64MacroAssembler masm, InvokeTarget target) {
	int before = masm.position();
	// Address is fixed up later by c++ code.
	masm.jmp();
	int after = masm.position();
	crb.recordDirectCall(before, after, target, null);
	masm.ensureUniquePC();
	}

	public static void indirectJmp(CompilationResultBuilder crb, AArch64MacroAssembler masm, Register dst, InvokeTarget target) {
	int before = masm.position();
	masm.jmp(dst);
	int after = masm.position();
	crb.recordIndirectCall(before, after, target, null);
	masm.ensureUniquePC();
	}

	public static void directConditionalJmp(CompilationResultBuilder crb, AArch64MacroAssembler masm, InvokeTarget target, AArch64Assembler.ConditionFlag cond) {
	int before = masm.position();
	masm.branchConditionally(cond);
	int after = masm.position();
	crb.recordDirectCall(before, after, target, null);
	masm.ensureUniquePC();
	}

	}