LibJS: Add builtin for Math.imul()

Author: https://github.com/awesomekling
Commit: https://github.com/LadybirdBrowser/ladybird/commit/714e8aec8a2
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4204

Libraries/LibJS/Bytecode/Builtins.h

@@ -19,6 +19,7 @@ namespace JS::Bytecode {
     O(MathExp, math_exp, Math, exp, 1)       \
     O(MathCeil, math_ceil, Math, ceil, 1)    \
     O(MathFloor, math_floor, Math, floor, 1) \
+    O(MathImul, math_imul, Math, imul, 2)    \
     O(MathRound, math_round, Math, round, 1) \
     O(MathSqrt, math_sqrt, Math, sqrt, 1)
 

Libraries/LibJS/Bytecode/Interpreter.cpp

@@ -2597,6 +2597,8 @@ static ThrowCompletionOr<Value> dispatch_builtin_call(Bytecode::Interpreter& int
         return TRY(MathObject::ceil_impl(interpreter.vm(), interpreter.get(arguments[0])));
     case Builtin::MathFloor:
         return TRY(MathObject::floor_impl(interpreter.vm(), interpreter.get(arguments[0])));
+    case Builtin::MathImul:
+        return TRY(MathObject::imul_impl(interpreter.vm(), interpreter.get(arguments[0]), interpreter.get(arguments[1])));
     case Builtin::MathRound:
         return TRY(MathObject::round_impl(interpreter.vm(), interpreter.get(arguments[0])));
     case Builtin::MathSqrt:

Libraries/LibJS/Runtime/MathObject.cpp

@@ -60,7 +60,7 @@ void MathObject::initialize(Realm& realm)
     define_native_function(realm, vm.names.fround, fround, 1, attr);
     define_native_function(realm, vm.names.f16round, f16round, 1, attr);
     define_native_function(realm, vm.names.hypot, hypot, 2, attr);
-    define_native_function(realm, vm.names.imul, imul, 2, attr);
+    define_native_function(realm, vm.names.imul, imul, 2, attr, Bytecode::Builtin::MathImul);
     define_native_function(realm, vm.names.log, log, 1, attr, Bytecode::Builtin::MathLog);
     define_native_function(realm, vm.names.log2, log2, 1, attr);
     define_native_function(realm, vm.names.log10, log10, 1, attr);
@@ -587,19 +587,25 @@ JS_DEFINE_NATIVE_FUNCTION(MathObject::hypot)
 }
 
 // 21.3.2.19 Math.imul ( x, y ), https://tc39.es/ecma262/#sec-math.imul
-JS_DEFINE_NATIVE_FUNCTION(MathObject::imul)
+ThrowCompletionOr<Value> MathObject::imul_impl(VM& vm, Value arg_a, Value arg_b)
 {
     // 1. Let a be ℝ(? ToUint32(x)).
-    auto a = TRY(vm.argument(0).to_u32(vm));
+    auto const a = TRY(arg_a.to_u32(vm));
 
     // 2. Let b be ℝ(? ToUint32(y)).
-    auto b = TRY(vm.argument(1).to_u32(vm));
+    auto const b = TRY(arg_b.to_u32(vm));
 
     // 3. Let product be (a × b) modulo 2^32.
     // 4. If product ≥ 2^31, return 𝔽(product - 2^32); otherwise return 𝔽(product).
     return Value(static_cast<i32>(a * b));
 }
 
+// 21.3.2.19 Math.imul ( x, y ), https://tc39.es/ecma262/#sec-math.imul
+JS_DEFINE_NATIVE_FUNCTION(MathObject::imul)
+{
+    return imul_impl(vm, vm.argument(0), vm.argument(1));
+}
+
 // 21.3.2.20 Math.log ( x ), https://tc39.es/ecma262/#sec-math.log
 ThrowCompletionOr<Value> MathObject::log_impl(VM& vm, Value x)
 {

Libraries/LibJS/Runtime/MathObject.h

@@ -27,6 +27,7 @@ public:
     static ThrowCompletionOr<Value> exp_impl(VM&, Value);
     static ThrowCompletionOr<Value> abs_impl(VM&, Value);
     static ThrowCompletionOr<Value> sum_precise_impl(VM&, Value);
+    static ThrowCompletionOr<Value> imul_impl(VM&, Value, Value);
 
 private:
     explicit MathObject(Realm&);