1 files changed, 22 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Include/X64/Nasm.inc b/roms/edk2/MdePkg/Include/X64/Nasm.inc
new file mode 100644
index 000000000..42412735e
--- /dev/null
+++ b/roms/edk2/MdePkg/Include/X64/Nasm.inc
@@ -0,0 +1,22 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+; 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