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diff --git a/src/node_modules/es-abstract/2020/BigIntBitwiseOp.js b/src/node_modules/es-abstract/2020/BigIntBitwiseOp.js
new file mode 100644
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+++ b/src/node_modules/es-abstract/2020/BigIntBitwiseOp.js
@@ -0,0 +1,66 @@
+'use strict';
+
+var GetIntrinsic = require('../GetIntrinsic');
+
+var $TypeError = GetIntrinsic('%TypeError%');
+// var $BigInt = GetIntrinsic('%BigInt%', true);
+// var $pow = GetIntrinsic('%Math.pow%');
+
+// var BinaryAnd = require('./BinaryAnd');
+// var BinaryOr = require('./BinaryOr');
+// var BinaryXor = require('./BinaryXor');
+var Type = require('./Type');
+// var modulo = require('./modulo');
+
+// var zero = $BigInt && $BigInt(0);
+// var negOne = $BigInt && $BigInt(-1);
+// var two = $BigInt && $BigInt(2);
+
+// https://www.ecma-international.org/ecma-262/11.0/#sec-bigintbitwiseop
+
+module.exports = function BigIntBitwiseOp(op, x, y) {
+	if (op !== '&' && op !== '|' && op !== '^') {
+		throw new $TypeError('Assertion failed: `op` must be `&`, `|`, or `^`');
+	}
+	if (Type(x) !== 'BigInt' || Type(y) !== 'BigInt') {
+		throw new $TypeError('`x` and `y` must be BigInts');
+	}
+
+	if (op === '&') {
+		return x & y;
+	}
+	if (op === '|') {
+		return x | y;
+	}
+	return x ^ y;
+	/*
+	var result = zero;
+	var shift = 0;
+	while (x !== zero && x !== negOne && y !== zero && y !== negOne) {
+		var xDigit = modulo(x, two);
+		var yDigit = modulo(y, two);
+		if (op === '&') {
+			result += $pow(2, shift) * BinaryAnd(xDigit, yDigit);
+		} else if (op === '|') {
+			result += $pow(2, shift) * BinaryOr(xDigit, yDigit);
+		} else if (op === '^') {
+			result += $pow(2, shift) * BinaryXor(xDigit, yDigit);
+		}
+		shift += 1;
+		x = (x - xDigit) / two;
+		y = (y - yDigit) / two;
+	}
+	var tmp;
+	if (op === '&') {
+		tmp = BinaryAnd(modulo(x, two), modulo(y, two));
+	} else if (op === '|') {
+		tmp = BinaryAnd(modulo(x, two), modulo(y, two));
+	} else {
+		tmp = BinaryXor(modulo(x, two), modulo(y, two));
+	}
+	if (tmp !== 0) {
+		result -= $pow(2, shift);
+	}
+    return result;
+    */
+};