RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-31 07:38:10 +00:00
Code Issues Activity Actions

LibJS/Bytecode: Add fast path for LeftShift with Int32 operands

Browse source
This commit is contained in:
Andreas Kling 2024-03-04 10:01:40 +01:00
parent 8e04791480
commit a5e1e66abc
2 changed files with 16 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

14
Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
View file

@ -864,6 +864,20 @@ ThrowCompletionOr<void> RightShift::execute_impl(Bytecode::Interpreter& interpre
return {};
}
ThrowCompletionOr<void> LeftShift::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto const lhs = interpreter.get(m_lhs);
auto const rhs = interpreter.get(m_rhs);
if (lhs.is_int32() && rhs.is_int32() && rhs.as_i32() >= 0) {
auto const shift_count = static_cast<u32>(rhs.as_i32()) % 32;
interpreter.set(m_dst, Value(lhs.as_i32() << shift_count));
return {};
}
interpreter.set(m_dst, TRY(left_shift(vm, lhs, rhs)));
return {};
}
ThrowCompletionOr<void> LessThan::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();