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LibJS/JIT: Compile the JumpNullish bytecode instruction
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2 changed files with 24 additions and 0 deletions
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@ -183,6 +183,26 @@ void Compiler::compile_jump_conditional(Bytecode::Op::JumpConditional const& op)
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m_assembler.jump(label_for(op.true_target()->block()));
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}
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void Compiler::compile_jump_nullish(Bytecode::Op::JumpNullish const& op)
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{
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load_vm_register(GPR0, Bytecode::Register::accumulator());
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m_assembler.shift_right(
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Assembler::Operand::Register(GPR0),
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Assembler::Operand::Imm8(48));
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m_assembler.bitwise_and(
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Assembler::Operand::Register(GPR0),
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Assembler::Operand::Imm32(IS_NULLISH_EXTRACT_PATTERN));
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m_assembler.jump_if_equal(
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Assembler::Operand::Register(GPR0),
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Assembler::Operand::Imm32(IS_NULLISH_PATTERN),
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label_for(op.true_target()->block()));
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m_assembler.jump(label_for(op.false_target()->block()));
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}
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[[maybe_unused]] static Value cxx_increment(VM& vm, Value value)
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{
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auto old_value = TRY_OR_SET_EXCEPTION(value.to_numeric(vm));
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@ -958,6 +978,9 @@ OwnPtr<NativeExecutable> Compiler::compile(Bytecode::Executable& bytecode_execut
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case Bytecode::Instruction::Type::JumpConditional:
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compiler.compile_jump_conditional(static_cast<Bytecode::Op::JumpConditional const&>(op));
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break;
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case Bytecode::Instruction::Type::JumpNullish:
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compiler.compile_jump_nullish(static_cast<Bytecode::Op::JumpNullish const&>(op));
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break;
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case Bytecode::Instruction::Type::Increment:
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compiler.compile_increment(static_cast<Bytecode::Op::Increment const&>(op));
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break;
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