diff --git a/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf b/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf
index af2f09617a..a734cac377 100644
--- a/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf
+++ b/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf
@@ -46,10 +46,6 @@
   X64/CpuFlushTlb.nasm
   X64/CpuSleep.nasm
 
-  X64/CpuSleep.nasm| GCC
-  X64/CpuSleep.S | GCC
-  X64/CpuFlushTlb.nasm| GCC
-  X64/CpuFlushTlb.S | GCC
 
 [Sources.EBC]
   Ebc/CpuSleepFlushTlb.c
diff --git a/MdePkg/Library/BaseCpuLib/X64/CpuFlushTlb.S b/MdePkg/Library/BaseCpuLib/X64/CpuFlushTlb.S
deleted file mode 100644
index 05d916a589..0000000000
--- a/MdePkg/Library/BaseCpuLib/X64/CpuFlushTlb.S
+++ /dev/null
@@ -1,35 +0,0 @@
-#------------------------------------------------------------------------------
-# Copyright (c) 2006 - 2018, 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.
-#
-# Module Name:
-#
-#   CpuFlushTlb.Asm
-#
-# Abstract:
-#
-#   CpuFlushTlb function
-#
-# Notes:
-#
-#------------------------------------------------------------------------------
-
-ASM_GLOBAL ASM_PFX(CpuFlushTlb)
-
-#------------------------------------------------------------------------------
-# VOID
-# EFIAPI
-# CpuFlushTlb (
-#   VOID
-#   );
-#------------------------------------------------------------------------------
-ASM_PFX(CpuFlushTlb):
-    mov     %cr3, %rax
-    mov     %rax, %cr3
-    ret
diff --git a/MdePkg/Library/BaseCpuLib/X64/CpuSleep.S b/MdePkg/Library/BaseCpuLib/X64/CpuSleep.S
deleted file mode 100644
index cf763689d7..0000000000
--- a/MdePkg/Library/BaseCpuLib/X64/CpuSleep.S
+++ /dev/null
@@ -1,34 +0,0 @@
-#------------------------------------------------------------------------------ ;
-# Copyright (c) 2006 - 2008, 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.
-#
-# Module Name:
-#
-#   CpuSleep.S
-#
-# Abstract:
-#
-#   CpuSleep function
-#
-# Notes:
-#
-#------------------------------------------------------------------------------
-
-
-#------------------------------------------------------------------------------
-# VOID
-# EFIAPI
-# CpuSleep (
-#   VOID
-#   );
-#------------------------------------------------------------------------------
-ASM_GLOBAL ASM_PFX(CpuSleep)
-ASM_PFX(CpuSleep):
-    hlt
-    ret