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23 
24 
25 
26 package org.graalvm.compiler.lir.aarch64;
27 
28 import static jdk.vm.ci.code.ValueUtil.asRegister;
29 
30 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
31 import org.graalvm.compiler.lir.LIRInstructionClass;
32 import org.graalvm.compiler.lir.Opcode;
33 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
34 
35 import jdk.vm.ci.code.Register;
36 import jdk.vm.ci.meta.AllocatableValue;
37 
38 @Opcode("SIGNEXTEND")
39 public class AArch64SignExtendOp extends AArch64LIRInstruction {
40     private static final LIRInstructionClass<AArch64SignExtendOp> TYPE = LIRInstructionClass.create(AArch64SignExtendOp.class);
41 
42     @Def protected AllocatableValue resultValue;
43     @Use protected AllocatableValue inputValue;
44     private final int fromBits;
45     private final int toBits;
46 
AArch64SignExtendOp(AllocatableValue resultValue, AllocatableValue inputValue, int fromBits, int toBits)47     public AArch64SignExtendOp(AllocatableValue resultValue, AllocatableValue inputValue, int fromBits, int toBits) {
48         super(TYPE);
49         this.resultValue = resultValue;
50         this.inputValue = inputValue;
51         this.fromBits = fromBits;
52         this.toBits = toBits;
53     }
54 
55     @Override
emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm)56     public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
57         Register result = asRegister(resultValue);
58         Register input = asRegister(inputValue);
59         masm.sxt(toBits <= 32 ? 32 : 64, fromBits, result, input);
60     }
61 }
62