1 files changed, 21 insertions, 0 deletions
diff --git a/src/stdbit/stdc_trailing_zeros_ull.cpp b/src/stdbit/stdc_trailing_zeros_ull.cpp
new file mode 100644
index 000000000000..77cb20cb1ba4
--- /dev/null
+++ b/src/stdbit/stdc_trailing_zeros_ull.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of stdc_trailing_zeros_ull -------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/stdbit/stdc_trailing_zeros_ull.h"
+
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(unsigned, stdc_trailing_zeros_ull,
+                   (unsigned long long value)) {
+  return static_cast<unsigned>(cpp::countr_zero(value));
+}
+
+} // namespace LIBC_NAMESPACE