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LibJS: Implement bitwise unsigned right shift operator (>>>)

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Linus Groh 2020-04-23 15:43:10 +01:00 • committed by Andreas Kling
parent 502d1f5165
commit 396ecfa2d7
6 changed files with 108 additions and 0 deletions
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15
Libraries/LibJS/AST.cpp
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -328,6 +329,8 @@ Value BinaryExpression::execute(Interpreter& interpreter) const
return left_shift(interpreter, lhs_result, rhs_result);
case BinaryOp::RightShift:
return right_shift(interpreter, lhs_result, rhs_result);
case BinaryOp::UnsignedRightShift:
return unsigned_right_shift(interpreter, lhs_result, rhs_result);
case BinaryOp::InstanceOf:
return instance_of(interpreter, lhs_result, rhs_result);
}
@ -506,6 +509,9 @@ void BinaryExpression::dump(int indent) const
case BinaryOp::RightShift:
op_string = ">>";
break;
case BinaryOp::UnsignedRightShift:
op_string = ">>>";
break;
case BinaryOp::InstanceOf:
op_string = "instanceof";
break;
@ -761,6 +767,12 @@ Value AssignmentExpression::execute(Interpreter& interpreter) const
return {};
rhs_result = right_shift(interpreter, lhs_result, rhs_result);
break;
case AssignmentOp::UnsignedRightShiftAssignment:
lhs_result = m_lhs->execute(interpreter);
if (interpreter.exception())
return {};
rhs_result = unsigned_right_shift(interpreter, lhs_result, rhs_result);
break;
}
if (interpreter.exception())
return {};
@ -834,6 +846,9 @@ void AssignmentExpression::dump(int indent) const
case AssignmentOp::RightShiftAssignment:
op_string = ">>=";
break;
case AssignmentOp::UnsignedRightShiftAssignment:
op_string = ">>>=";
break;
}
ASTNode::dump(indent);