1 files changed, 14 insertions, 0 deletions
diff --git a/src/runtime/os_windows_arm64.go b/src/runtime/os_windows_arm64.go
new file mode 100644
index 0000000..7e41344
--- /dev/null
+++ b/src/runtime/os_windows_arm64.go
@@ -0,0 +1,14 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package runtime
+
+import "unsafe"
+
+//go:nosplit
+func cputicks() int64 {
+	var counter int64
+	stdcall1(_QueryPerformanceCounter, uintptr(unsafe.Pointer(&counter)))
+	return counter
+}