Source code

001/*
002 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.lir.sparc;
024
025import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*;
026import static jdk.internal.jvmci.code.ValueUtil.*;
027import static jdk.internal.jvmci.sparc.SPARC.*;
028import jdk.internal.jvmci.code.*;
029import jdk.internal.jvmci.common.*;
030import jdk.internal.jvmci.meta.*;
031
032import com.oracle.graal.asm.sparc.*;
033import com.oracle.graal.asm.sparc.SPARCMacroAssembler.ScratchRegister;
034import com.oracle.graal.asm.sparc.SPARCMacroAssembler.Sethix;
035import com.oracle.graal.compiler.common.spi.*;
036import com.oracle.graal.lir.*;
037import com.oracle.graal.lir.asm.*;
038
039public class SPARCCall {
040
041    public abstract static class CallOp extends SPARCLIRInstruction {
042        @Def({REG, ILLEGAL}) protected Value result;
043        @Use({REG, STACK}) protected Value[] parameters;
044        @Temp protected Value[] temps;
045        @State protected LIRFrameState state;
046
047        protected CallOp(LIRInstructionClass<? extends CallOp> c, SizeEstimate size, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
048            super(c, size);
049            this.result = result;
050            this.parameters = parameters;
051            this.state = state;
052            this.temps = temps;
053            assert temps != null;
054        }
055
056        @Override
057        public boolean destroysCallerSavedRegisters() {
058            return true;
059        }
060    }
061
062    public abstract static class MethodCallOp extends CallOp {
063
064        protected final ResolvedJavaMethod callTarget;
065
066        protected MethodCallOp(LIRInstructionClass<? extends MethodCallOp> c, SizeEstimate size, ResolvedJavaMethod callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
067            super(c, size, result, parameters, temps, state);
068            this.callTarget = callTarget;
069        }
070
071    }
072
073    @Opcode("CALL_DIRECT")
074    public abstract static class DirectCallOp extends MethodCallOp {
075        private boolean emitted = false;
076        private int before = -1;
077
078        public DirectCallOp(LIRInstructionClass<? extends DirectCallOp> c, SizeEstimate size, ResolvedJavaMethod callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
079            super(c, size, callTarget, result, parameters, temps, state);
080        }
081
082        @Override
083        public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
084            if (!emitted) {
085                emitCallPrefixCode(crb, masm);
086                directCall(crb, masm, callTarget, null, state);
087            } else {
088                int after = masm.position();
089                if (after - before == 4) {
090                    masm.nop();
091                } else if (after - before == 8) {
092                    // everything is fine;
093                } else {
094                    JVMCIError.shouldNotReachHere("" + (after - before));
095                }
096                after = masm.position();
097                crb.recordDirectCall(before, after, callTarget, state);
098                crb.recordExceptionHandlers(after, state);
099                masm.ensureUniquePC();
100            }
101        }
102
103        @SuppressWarnings("unused")
104        public void emitCallPrefixCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
105            //
106        }
107
108        public void emitControlTransfer(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
109            assert !emitted;
110            emitCallPrefixCode(crb, masm);
111            before = masm.call(0);
112            emitted = true;
113        }
114
115        public void resetState() {
116            emitted = false;
117            before = -1;
118        }
119    }
120
121    @Opcode("CALL_INDIRECT")
122    public abstract static class IndirectCallOp extends MethodCallOp {
123        @Use({REG}) protected Value targetAddress;
124
125        protected IndirectCallOp(LIRInstructionClass<? extends IndirectCallOp> c, SizeEstimate size, ResolvedJavaMethod callTarget, Value result, Value[] parameters, Value[] temps,
126                        Value targetAddress, LIRFrameState state) {
127            super(c, size, callTarget, result, parameters, temps, state);
128            this.targetAddress = targetAddress;
129        }
130
131        @Override
132        public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
133            indirectCall(crb, masm, asRegister(targetAddress), callTarget, state);
134        }
135
136        @Override
137        public void verify() {
138            super.verify();
139            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";
140        }
141    }
142
143    public abstract static class ForeignCallOp extends CallOp {
144        public static final LIRInstructionClass<ForeignCallOp> TYPE = LIRInstructionClass.create(ForeignCallOp.class);
145
146        protected final ForeignCallLinkage callTarget;
147
148        public ForeignCallOp(LIRInstructionClass<? extends ForeignCallOp> c, SizeEstimate size, ForeignCallLinkage callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
149            super(c, size, result, parameters, temps, state);
150            this.callTarget = callTarget;
151        }
152
153        @Override
154        public boolean destroysCallerSavedRegisters() {
155            return callTarget.destroysRegisters();
156        }
157    }
158
159    @Opcode("NEAR_FOREIGN_CALL")
160    public static final class DirectNearForeignCallOp extends ForeignCallOp {
161        public static final LIRInstructionClass<DirectNearForeignCallOp> TYPE = LIRInstructionClass.create(DirectNearForeignCallOp.class);
162        public static final SizeEstimate SIZE = SizeEstimate.create(1);
163
164        public DirectNearForeignCallOp(ForeignCallLinkage linkage, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
165            super(TYPE, SIZE, linkage, result, parameters, temps, state);
166        }
167
168        @Override
169        public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
170            directCall(crb, masm, callTarget, null, state);
171        }
172    }
173
174    @Opcode("FAR_FOREIGN_CALL")
175    public static final class DirectFarForeignCallOp extends ForeignCallOp {
176        public static final LIRInstructionClass<DirectFarForeignCallOp> TYPE = LIRInstructionClass.create(DirectFarForeignCallOp.class);
177        public static final SizeEstimate SIZE = SizeEstimate.create(1);
178
179        public DirectFarForeignCallOp(ForeignCallLinkage callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
180            super(TYPE, SIZE, callTarget, result, parameters, temps, state);
181        }
182
183        @Override
184        public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
185            try (ScratchRegister scratch = masm.getScratchRegister()) {
186                directCall(crb, masm, callTarget, scratch.getRegister(), state);
187            }
188        }
189    }
190
191    public static void directCall(CompilationResultBuilder crb, SPARCMacroAssembler masm, InvokeTarget callTarget, Register scratch, LIRFrameState info) {
192        int before;
193        if (scratch != null) {
194            // offset might not fit a 30-bit displacement, generate an
195            // indirect call with a 64-bit immediate
196            before = masm.position();
197            new Sethix(0L, scratch, true).emit(masm);
198            masm.jmpl(scratch, 0, o7);
199        } else {
200            before = masm.call(0);
201        }
202        masm.nop();  // delay slot
203        int after = masm.position();
204        crb.recordDirectCall(before, after, callTarget, info);
205        crb.recordExceptionHandlers(after, info);
206        masm.ensureUniquePC();
207    }
208
209    public static void indirectJmp(CompilationResultBuilder crb, SPARCMacroAssembler masm, Register dst, InvokeTarget target) {
210        int before = masm.position();
211        new Sethix(0L, dst, true).emit(masm);
212        masm.jmp(new SPARCAddress(dst, 0));
213        masm.nop();  // delay slot
214        int after = masm.position();
215        crb.recordIndirectCall(before, after, target, null);
216        masm.ensureUniquePC();
217    }
218
219    public static void indirectCall(CompilationResultBuilder crb, SPARCMacroAssembler masm, Register dst, InvokeTarget callTarget, LIRFrameState info) {
220        int before = masm.jmpl(dst, 0, o7);
221        masm.nop();  // delay slot
222        int after = masm.position();
223        crb.recordIndirectCall(before, after, callTarget, info);
224        crb.recordExceptionHandlers(after, info);
225        masm.ensureUniquePC();
226    }
227}