1 files changed, 41 insertions, 0 deletions
diff --git a/MdePkg/Library/CompilerIntrinsicsLib/memset_ms.c b/MdePkg/Library/CompilerIntrinsicsLib/memset_ms.c
new file mode 100644
index 0000000000..5882cd28b0
--- /dev/null
+++ b/MdePkg/Library/CompilerIntrinsicsLib/memset_ms.c
@@ -0,0 +1,41 @@
+// ------------------------------------------------------------------------------
+//
+// Copyright (c) 2017, Pete Batard. All rights reserved.<BR>
+// Copyright (c) 2021, Arm Limited. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// ------------------------------------------------------------------------------
+
+#if defined (_M_ARM64)
+typedef unsigned __int64 size_t;
+#else
+typedef unsigned __int32 size_t;
+#endif
+
+void *
+memset (
+  void *,
+  int,
+  size_t
+  );
+
+#pragma intrinsic(memset)
+#pragma function(memset)
+void *
+memset (
+  void    *s,
+  int     c,
+  size_t  n
+  )
+{
+  unsigned char  *d;
+
+  d = s;
+
+  while (n-- != 0) {
+    *d++ = (unsigned char)c;
+  }
+
+  return s;
+}