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LibJS/JIT: Compile the JumpNullish bytecode instruction

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This commit is contained in:
Andreas Kling 2023-10-27 16:22:27 +02:00
parent 17b2c7d965
commit d6756decb9
2 changed files with 24 additions and 0 deletions
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23
Userland/Libraries/LibJS/JIT/Compiler.cpp
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@ -183,6 +183,26 @@ void Compiler::compile_jump_conditional(Bytecode::Op::JumpConditional const& op)
m_assembler.jump(label_for(op.true_target()->block()));
}
void Compiler::compile_jump_nullish(Bytecode::Op::JumpNullish const& op)
{
load_vm_register(GPR0, Bytecode::Register::accumulator());
m_assembler.shift_right(
Assembler::Operand::Register(GPR0),
Assembler::Operand::Imm8(48));
m_assembler.bitwise_and(
Assembler::Operand::Register(GPR0),
Assembler::Operand::Imm32(IS_NULLISH_EXTRACT_PATTERN));
m_assembler.jump_if_equal(
Assembler::Operand::Register(GPR0),
Assembler::Operand::Imm32(IS_NULLISH_PATTERN),
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)
{
auto old_value = TRY_OR_SET_EXCEPTION(value.to_numeric(vm));
@ -958,6 +978,9 @@ OwnPtr<NativeExecutable> Compiler::compile(Bytecode::Executable& bytecode_execut
case Bytecode::Instruction::Type::JumpConditional:
compiler.compile_jump_conditional(static_cast<Bytecode::Op::JumpConditional const&>(op));
break;
case Bytecode::Instruction::Type::JumpNullish:
compiler.compile_jump_nullish(static_cast<Bytecode::Op::JumpNullish const&>(op));
break;
case Bytecode::Instruction::Type::Increment:
compiler.compile_increment(static_cast<Bytecode::Op::Increment const&>(op));
break;