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LibJS/JIT: Add fast path for Int32 & Int32

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This commit is contained in:
Andreas Kling 2023-11-03 08:47:35 +01:00
parent 17ae6edd8e
commit 82635083dc
2 changed files with 29 additions and 1 deletions
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29
Userland/Libraries/LibJS/JIT/Compiler.cpp
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@ -626,6 +626,35 @@ void Compiler::compile_less_than(Bytecode::Op::LessThan const& op)
end.link(m_assembler);
}
static Value cxx_bitwise_and(VM& vm, Value lhs, Value rhs)
{
return TRY_OR_SET_EXCEPTION(bitwise_and(vm, lhs, rhs));
}
void Compiler::compile_bitwise_and(Bytecode::Op::BitwiseAnd const& op)
{
load_vm_register(ARG1, op.lhs());
load_accumulator(ARG2);
Assembler::Label end {};
branch_if_both_int32(ARG1, ARG2, [&] {
// NOTE: Since both sides are Int32, we know that the upper 32 bits are nothing but the INT32_TAG.
// This means we can get away with just a simple 64-bit bitwise and.
m_assembler.bitwise_and(
Assembler::Operand::Register(ARG1),
Assembler::Operand::Register(ARG2));
store_accumulator(ARG1);
m_assembler.jump(end);
});
native_call((void*)cxx_bitwise_and);
store_accumulator(RET);
check_exception();
end.link(m_assembler);
}
static ThrowCompletionOr<Value> not_(VM&, Value value)
{
return Value(!value.to_boolean());