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LibJS/JIT: Compile the Yield instruction

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This commit is contained in:
Simon Wanner 2023-11-02 21:53:20 +01:00 • committed by Andreas Kling
parent e400682fb1
commit 4671520c0a
2 changed files with 42 additions and 1 deletions
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39
Userland/Libraries/LibJS/JIT/Compiler.cpp
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@ -1685,6 +1685,45 @@ void Compiler::compile_async_iterator_close(Bytecode::Op::AsyncIteratorClose con
check_exception();
}
static Value cxx_continuation(VM& vm, Value value, Value continuation, Value is_await)
{
auto object = Object::create(*vm.current_realm(), nullptr);
object->define_direct_property("result", value.value_or(js_undefined()), JS::default_attributes);
object->define_direct_property("continuation", continuation, JS::default_attributes);
object->define_direct_property("isAwait", is_await, JS::default_attributes);
return object;
}
void Compiler::compile_continuation(Optional<Bytecode::Label> continuation, bool is_await)
{
load_accumulator(ARG1);
if (continuation.has_value()) {
// FIXME: If we get a pointer, which is not accurately representable as a double
// will cause this to explode
auto continuation_value = Value(static_cast<double>(bit_cast<u64>(&continuation->block())));
m_assembler.mov(
Assembler::Operand::Register(ARG2),
Assembler::Operand::Imm(continuation_value.encoded()));
} else {
m_assembler.mov(
Assembler::Operand::Register(ARG2),
Assembler::Operand::Imm(Value(0).encoded()));
}
m_assembler.mov(
Assembler::Operand::Register(ARG3),
Assembler::Operand::Imm(Value(is_await).encoded()));
native_call((void*)cxx_continuation);
store_vm_register(Bytecode::Register::return_value(), RET);
// FIXME: This should run the finalizer if it is a return
jump_to_exit();
}
void Compiler::compile_yield(Bytecode::Op::Yield const& op)
{
compile_continuation(op.continuation(), false);
}
void Compiler::jump_to_exit()
{
m_assembler.jump(m_exit_label);