LibJS: Add LessThan bytecode instruction :^)

3 files changed, 32 insertions, 0 deletions

diff --git a/Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp b/Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
index 5f349dd2ea..b6adc70c21 100644
--- a/Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
+++ b/Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
@@ -48,6 +48,9 @@ Optional<Bytecode::Register> BinaryExpression::generate_bytecode(Bytecode::Gener
     case BinaryOp::Subtraction:
         generator.emit<Bytecode::Op::Sub>(dst_reg, *lhs_reg, *rhs_reg);
         return dst_reg;
+    case BinaryOp::LessThan:
+        generator.emit<Bytecode::Op::LessThan>(dst_reg, *lhs_reg, *rhs_reg);
+        return dst_reg;
     default:
         TODO();
     }
diff --git a/Userland/Libraries/LibJS/Bytecode/Op.cpp b/Userland/Libraries/LibJS/Bytecode/Op.cpp
index 570bcff112..1d975150f7 100644
--- a/Userland/Libraries/LibJS/Bytecode/Op.cpp
+++ b/Userland/Libraries/LibJS/Bytecode/Op.cpp
@@ -26,6 +26,11 @@ void Sub::execute(Bytecode::Interpreter& interpreter) const
     interpreter.reg(m_dst) = sub(interpreter.global_object(), interpreter.reg(m_src1), interpreter.reg(m_src2));
 }
 
+void LessThan::execute(Bytecode::Interpreter& interpreter) const
+{
+    interpreter.reg(m_dst) = less_than(interpreter.global_object(), interpreter.reg(m_src1), interpreter.reg(m_src2));
+}
+
 void NewString::execute(Bytecode::Interpreter& interpreter) const
 {
     interpreter.reg(m_dst) = js_string(interpreter.vm(), m_string);
@@ -56,6 +61,11 @@ String Sub::to_string() const
     return String::formatted("Sub dst:{}, src1:{}, src2:{}", m_dst, m_src1, m_src2);
 }
 
+String LessThan::to_string() const
+{
+    return String::formatted("LessThan dst:{}, src1:{}, src2:{}", m_dst, m_src1, m_src2);
+}
+
 String NewString::to_string() const
 {
     return String::formatted("NewString dst:{}, string:\"{}\"", m_dst, m_string);
diff --git a/Userland/Libraries/LibJS/Bytecode/Op.h b/Userland/Libraries/LibJS/Bytecode/Op.h
index 93fc951483..14a6ef1f8f 100644
--- a/Userland/Libraries/LibJS/Bytecode/Op.h
+++ b/Userland/Libraries/LibJS/Bytecode/Op.h
@@ -69,6 +69,25 @@ private:
     Register m_src2;
 };
 
+class LessThan final : public Instruction {
+public:
+    LessThan(Register dst, Register src1, Register src2)
+        : m_dst(dst)
+        , m_src1(src1)
+        , m_src2(src2)
+    {
+    }
+
+    virtual ~LessThan() override { }
+    virtual void execute(Bytecode::Interpreter&) const override;
+    virtual String to_string() const override;
+
+private:
+    Register m_dst;
+    Register m_src1;
+    Register m_src2;
+};
+
 class NewString final : public Instruction {
 public:
     NewString(Register dst, String string)