1 files changed, 28 insertions, 0 deletions
diff --git a/MdePkg/Include/X64/Nasm.inc b/MdePkg/Include/X64/Nasm.inc
new file mode 100644
index 0000000000..129a330212
--- /dev/null
+++ b/MdePkg/Include/X64/Nasm.inc
@@ -0,0 +1,28 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+; This program and the accompanying materials
+; are licensed and made available under the terms and conditions of the BSD License
+; which accompanies this distribution.  The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php.
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+; Abstract:
+;
+;   This file provides macro definitions for NASM files.
+;
+;------------------------------------------------------------------------------
+
+%macro SETSSBSY        0
+    DB 0xF3, 0x0F, 0x01, 0xE8
+%endmacro
+
+%macro READSSP_RAX     0
+    DB 0xF3, 0x48, 0x0F, 0x1E, 0xC8
+%endmacro
+
+%macro INCSSP_RAX      0
+    DB 0xF3, 0x48, 0x0F, 0xAE, 0xE8
+%endmacro