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23 
24 
25 
26 package org.graalvm.compiler.core.aarch64;
27 
28 import static org.graalvm.compiler.lir.LIRValueUtil.asConstant;
29 import static org.graalvm.compiler.lir.LIRValueUtil.isConstantValue;
30 import static org.graalvm.compiler.lir.LIRValueUtil.isStackSlotValue;
31 
32 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
33 import org.graalvm.compiler.core.common.type.DataPointerConstant;
34 import org.graalvm.compiler.debug.GraalError;
35 import org.graalvm.compiler.lir.LIRInstruction;
36 import org.graalvm.compiler.lir.aarch64.AArch64AddressValue;
37 import org.graalvm.compiler.lir.aarch64.AArch64LIRInstruction;
38 import org.graalvm.compiler.lir.aarch64.AArch64Move;
39 import org.graalvm.compiler.lir.aarch64.AArch64Move.LoadAddressOp;
40 import org.graalvm.compiler.lir.gen.LIRGeneratorTool.MoveFactory;
41 
42 import jdk.vm.ci.meta.AllocatableValue;
43 import jdk.vm.ci.meta.Constant;
44 import jdk.vm.ci.meta.JavaConstant;
45 import jdk.vm.ci.meta.Value;
46 
47 public class AArch64MoveFactory implements MoveFactory {
48 
49     @Override
createMove(AllocatableValue dst, Value src)50     public LIRInstruction createMove(AllocatableValue dst, Value src) {
51         boolean srcIsSlot = isStackSlotValue(src);
52         boolean dstIsSlot = isStackSlotValue(dst);
53         if (isConstantValue(src)) {
54             return createLoad(dst, asConstant(src));
55         } else if (src instanceof AArch64AddressValue) {
56             return new LoadAddressOp(dst, (AArch64AddressValue) src);
57         } else {
58             assert src instanceof AllocatableValue;
59             if (srcIsSlot && dstIsSlot) {
60                 throw GraalError.shouldNotReachHere(src.getClass() + " " + dst.getClass());
61             } else {
62                 return new AArch64Move.Move(dst, (AllocatableValue) src);
63             }
64         }
65     }
66 
67     @Override
createStackMove(AllocatableValue result, AllocatableValue input)68     public LIRInstruction createStackMove(AllocatableValue result, AllocatableValue input) {
69         return new AArch64Move.Move(result, input);
70     }
71 
72     @Override
createLoad(AllocatableValue dst, Constant src)73     public AArch64LIRInstruction createLoad(AllocatableValue dst, Constant src) {
74         if (src instanceof JavaConstant) {
75             JavaConstant javaConstant = (JavaConstant) src;
76             if (canInlineConstant(javaConstant)) {
77                 return new AArch64Move.LoadInlineConstant(javaConstant, dst);
78             } else {
79                 // return new AArch64Move.LoadConstantFromTable(javaConstant,
80                 // constantTableBaseProvider.getConstantTableBase(), dst);
81                 return new AArch64Move.LoadInlineConstant(javaConstant, dst);
82             }
83         } else if (src instanceof DataPointerConstant) {
84             return new AArch64Move.LoadDataOp(dst, (DataPointerConstant) src);
85         } else {
86             // throw GraalError.shouldNotReachHere(src.getClass().toString());
87             throw GraalError.unimplemented();
88         }
89     }
90 
91     @Override
createStackLoad(AllocatableValue result, Constant input)92     public LIRInstruction createStackLoad(AllocatableValue result, Constant input) {
93         return createLoad(result, input);
94     }
95 
96     @Override
canInlineConstant(Constant con)97     public boolean canInlineConstant(Constant con) {
98         if (con instanceof JavaConstant) {
99             JavaConstant c = (JavaConstant) con;
100             switch (c.getJavaKind()) {
101                 case Boolean:
102                 case Byte:
103                 case Char:
104                 case Short:
105                 case Int:
106                     return AArch64MacroAssembler.isMovableImmediate(c.asInt());
107                 case Long:
108                     return AArch64MacroAssembler.isMovableImmediate(c.asLong());
109                 case Object:
110                     return c.isNull();
111                 default:
112                     return false;
113             }
114         }
115         return false;
116     }
117 
118     @Override
allowConstantToStackMove(Constant value)119     public boolean allowConstantToStackMove(Constant value) {
120         return false;
121     }
122 
123 }
124