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LibJS/JIT: Compile the JumpUndefined instruction

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This commit is contained in:
Simon Wanner 2023-10-30 00:39:58 +01:00 • committed by Andreas Kling
parent a16082c6a5
commit fd059d4e4a
2 changed files with 18 additions and 0 deletions
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17
Userland/Libraries/LibJS/JIT/Compiler.cpp
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@ -212,6 +212,23 @@ void Compiler::compile_jump_nullish(Bytecode::Op::JumpNullish const& op)
m_assembler.jump(label_for(op.false_target()->block())); m_assembler.jump(label_for(op.false_target()->block()));
} }
void Compiler::compile_jump_undefined(Bytecode::Op::JumpUndefined const& op)
{
load_vm_register(GPR0, Bytecode::Register::accumulator());
m_assembler.shift_right(
Assembler::Operand::Register(GPR0),
Assembler::Operand::Imm(48));
m_assembler.jump_if(
Assembler::Operand::Register(GPR0),
Assembler::Condition::EqualTo,
Assembler::Operand::Imm(UNDEFINED_TAG),
label_for(op.true_target()->block()));
m_assembler.jump(label_for(op.false_target()->block()));
}
[[maybe_unused]] static Value cxx_increment(VM& vm, Value value) [[maybe_unused]] static Value cxx_increment(VM& vm, Value value)
{ {
auto old_value = TRY_OR_SET_EXCEPTION(value.to_numeric(vm)); auto old_value = TRY_OR_SET_EXCEPTION(value.to_numeric(vm));

1
Userland/Libraries/LibJS/JIT/Compiler.h
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@ -74,6 +74,7 @@ private:
O(Jump, jump) \ O(Jump, jump) \
O(JumpConditional, jump_conditional) \ O(JumpConditional, jump_conditional) \
O(JumpNullish, jump_nullish) \ O(JumpNullish, jump_nullish) \
O(JumpUndefined, jump_undefined) \
O(Increment, increment) \ O(Increment, increment) \
O(Decrement, decrement) \ O(Decrement, decrement) \
O(EnterUnwindContext, enter_unwind_context) \ O(EnterUnwindContext, enter_unwind_context) \