4 files changed, 37 insertions, 0 deletions
diff --git a/node_modules/es5-ext/math/imul/implement.js b/node_modules/es5-ext/math/imul/implement.js
new file mode 100644
index 000000000..bff57735b
--- /dev/null
+++ b/node_modules/es5-ext/math/imul/implement.js
@@ -0,0 +1,8 @@
+"use strict";
+
+if (!require("./is-implemented")()) {
+	Object.defineProperty(Math, "imul", { value: require("./shim"),
+		configurable: true,
+enumerable: false,
+writable: true });
+}
diff --git a/node_modules/es5-ext/math/imul/index.js b/node_modules/es5-ext/math/imul/index.js
new file mode 100644
index 000000000..a756d5949
--- /dev/null
+++ b/node_modules/es5-ext/math/imul/index.js
@@ -0,0 +1,5 @@
+"use strict";
+
+module.exports = require("./is-implemented")()
+	? Math.imul
+	: require("./shim");
diff --git a/node_modules/es5-ext/math/imul/is-implemented.js b/node_modules/es5-ext/math/imul/is-implemented.js
new file mode 100644
index 000000000..0f3291984
--- /dev/null
+++ b/node_modules/es5-ext/math/imul/is-implemented.js
@@ -0,0 +1,7 @@
+"use strict";
+
+module.exports = function () {
+	var imul = Math.imul;
+	if (typeof imul !== "function") return false;
+	return imul(-1, 8) === -8;
+};
diff --git a/node_modules/es5-ext/math/imul/shim.js b/node_modules/es5-ext/math/imul/shim.js
new file mode 100644
index 000000000..a14e5895b
--- /dev/null
+++ b/node_modules/es5-ext/math/imul/shim.js
@@ -0,0 +1,17 @@
+/* eslint no-bitwise: "off" */
+
+// Thanks: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference
+//         /Global_Objects/Math/imul
+
+"use strict";
+
+module.exports = function (val1, val2) {
+	var xh = (val1 >>> 16) & 0xffff
+	  , xl = val1 & 0xffff
+	  , yh = (val2 >>> 16) & 0xffff
+	  , yl = val2 & 0xffff;
+
+	// The shift by 0 fixes the sign on the high part
+	// the final |0 converts the unsigned value into a signed value
+	return (xl * yl + ((xh * yl + xl * yh) << 16 >>> 0)) | 0;
+};