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LibJS: Add bytecode instructions for a bunch of unary operators

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~, !, +, -, typeof, and void.
This commit is contained in:
Linus Groh 2021-06-07 19:53:47 +01:00
parent 54fc7079c6
commit fa9bad912e
5 changed files with 175 additions and 1 deletions
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32
Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
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@ -93,6 +93,38 @@ Optional<Bytecode::Register> BinaryExpression::generate_bytecode(Bytecode::Gener
}
}
Optional<Bytecode::Register> UnaryExpression::generate_bytecode(Bytecode::Generator& generator) const
{
auto lhs_reg = m_lhs->generate_bytecode(generator);
VERIFY(lhs_reg.has_value());
auto dst_reg = generator.allocate_register();
switch (m_op) {
case UnaryOp::BitwiseNot:
generator.emit<Bytecode::Op::BitwiseNot>(dst_reg, *lhs_reg);
return dst_reg;
case UnaryOp::Not:
generator.emit<Bytecode::Op::Not>(dst_reg, *lhs_reg);
return dst_reg;
case UnaryOp::Plus:
generator.emit<Bytecode::Op::UnaryPlus>(dst_reg, *lhs_reg);
return dst_reg;
case UnaryOp::Minus:
generator.emit<Bytecode::Op::UnaryMinus>(dst_reg, *lhs_reg);
return dst_reg;
case UnaryOp::Typeof:
generator.emit<Bytecode::Op::Typeof>(dst_reg, *lhs_reg);
return dst_reg;
case UnaryOp::Void:
generator.emit<Bytecode::Op::Load>(dst_reg, js_undefined());
return dst_reg;
default:
TODO();
}
}
Optional<Bytecode::Register> NumericLiteral::generate_bytecode(Bytecode::Generator& generator) const
{
auto dst = generator.allocate_register();